bluuebunny/crossref_metadata_2025 huggingface dataset:
Isotopic Dating and Geological Significance of Stratiform Orebody in Gejiu Tin Deposit, Yunnan, China
Authors: Li Ying Shu , Cai Yan , Chen Jiao Jiao , Chen Nan , Wang Lun , Zhang Yi Ke , He Da Qing
Published: December 2012

Gejiu tin ore deposit is a famous tin-polymetallic deposit in the world because of its enormous metal reserves. Besides tin, there are copper, lead, zinc, silver, iron, sulphur, tungsten, bismuth, indium and rare earth elements. It was believed that there mainly are skarn-type tin deposit, stratiform tin deposit and basalt-type copper deposit in Gejiu tin orefield. The stratiform tin deposit are distributed in Lutangba, Malage and Huangmaoshan, which are hosted by carbonate rocks of Gejiu formation in Middle Triassic Series. 40Ar-39Ar dating of cassiterite from the sratiform tin deposit in Lutangba yields plateau age of 202.18±2.35Ma and isochron age of 206.81±3.23 Ma respectively. The ages are obviously older than those of the ore of the skarn type deposit of the Yanshanian epoch．The mineralization is the seabed exhalative hydrothermal sedimentary mineralization of the Indosinia epoch.
The Application Extension of the Four Key Controlling Factors for the Formation of Lithologic Pool in Hongliuquan Area, Qaidam Basin
Authors: Chen Kai , Liu Zhen , Zhang Jun Hui
Published: December 2012

In order to research the application extension of the viewpoint of the four key factors controlling formation process of lithologic traps, the paper was dissected lithologic reservoir dynamically, mainly analyzing the paleo-fluid dynamics, paleo-hydrocarbon migration pathway, paleo-critical physical properties of reservoirs and paleo-sealing conditions of the traps in formation of hydrocarbon accumulation period. The results show that they recover the limited and most important factors for formation of lithologic traps and come back the formation process of lithologic traps availably, and it also can used to be evaluated low exploration basin dynamically, compositely analyzed key factors controlling formation process of lithologic traps and selected advantaged target area. The application of this methodology indicates that it could be widely used in the dynamic formation of lithologic traps and dynamical evaluation of low exploration basin in Hongliuquan area, Qaidam basin.
Application of 3G Technology in Coal Mine Monitoring System
Authors: Ma Yong Li
Published: December 2012

Aiming at the present situation of complex environment and safety monitoring system in coal mine, this article proposes one kind design scheme about wireless system in coal mine monitoring based on the 3G technology, introduces the hardware and software design. The system makes use of monitoring terminal completed field data collection and processing, image and alarm signal are accessed internet through the 3G wireless network, realize remote monitoring center real-time video monitoring on the mine site.
The Simevariogram and its Application in a Tin Ore Deposit of China
Authors: Li Ying Shu , Cai Yan , Chen Nan , Chen Jiao Jiao , Wang Lun , Zhang Yi Ke , He Da Qing
Published: December 2012

Simevariogram can preferably reflect basic characteristics of regionalized variables of one orebody in geology, especially it can reflect structrural change of the variables by random change of the variables. It’s proved that using ordinary kriging method and a traditional method are generally coincident and the deposit in China undergoes early biochemical sedimentary mineralization and later granitic superimposed mineralization.
Water Controlling Research of Complex Fault Structures in Wugou Mine
Authors: Zhang Wen Quan , Li Wei , Zhang Guang Peng , Zhang Gui Bin
Published: December 2012

Once the lead abutment pressure influence the fault structure, its internal rock mass is damaged easily while the fault structures are the most vulnerable of mining influence weak link. If the fault structures conduct the aquifer, the mine water inrush will occur. This paper researchs water level of Taiyuan limestone aquifer with three-dimensional form simulation and analyzes mine water movement characteristics and the change of water level and hydraulic contact of each aquifer combining with complex geological conditions of Wugou mine, aiming at tectonic evolution and tectonic combination characteristic of the mine, according to the long observation hole material. Combining with water pressure test results and drilling and geophysical prospecting achievement, using daubing coefficient method to analyze sealing of fault structure, we conclude that faults are pressure-torsional normal faults which their fault zone is compact and has high strength so we can narrow even do not leave set fault waterproof pillar in Wugou mine.
Modeling and Simulation of the Aircraft Deicing Vehicle Based on Pro/E
Authors: Xing Zhi Wei , Lv Yong
Published: December 2012

The domestic QYZ5200TCB aircraft deicing vehicle is studied. Three dimensional solid modeling, virtual assembly, dynamic simulation, interference check and kinetic modeling are performed to the manipulator and Leveling Mechanism of the aircraft deicing vehicle under Pro/Engineer environment. The Virtual Prototype Development and Design is realized under the Pro/Engineer environment， which founds a basis for the further design optimization 、analysis and manufacture of products.
Influence of Pulp pH on Flotation of Fluorite and Calcite
Authors: Zhao Wen Juan , Liu Dian Wen , Li Hong Shuai , Feng Qi Cheng , Xu Guo Yin , Yuan Jing Jie , Jia Xiao Dong
Published: December 2012

Pulp pH value plays a significant role in the froth flotation. Especially in the flotation of fluorite, the performance of flotation will be affected greatly by pulp pH. MO, a new kind of modified fatty acid was used as collector, and H2SO4 and Na2CO3 were used to regulate pulp pH in the experiment. The mechanism of influence of pulp pH on flotation of fluorite and calcite was investigated by such parameters as fluorite recovery, zeta potentials and the infrared spectroscopy about minerals at different pulp pH values. As is shown in the results, the point of zero charge(PZC) of fluorite is pH=9.5 and the PZC of calcite is pH=8.5. The optimum pulp pH of the flotation of fluorite and calcite is determined as 9.5~10 and 8~9 respectively. pH value should be controlled above 9 to depress calcite. Finally, 9.5~10 was determined as the optimum pH to float the fluorite from the calcium-containing fluorite ores.
Cyanide Leaching Experiment Research on Gold - Bearing Tailings
Authors: Jiang Mei Guang , Liu Quan Jun , Xiao Hong , Yang Jun Long
Published: December 2012

The gold grade of the gold mine is high，because of the him particle size is fine，after flotation and gravity separation,the grade of gold is 3.5g/t,In order to increase economic efficiency and improve the resource utilization,this paper studies cyanide leaching of gold ore on the tailings,With studying experiment,the grade of gold is approximately 0.17g/t.the leaching rate of gold is nearly 95%.
Beneficiation of Ultrafine Cassiterite from a Tin Tailings by Flotation
Authors: Zhou Yong Cheng , Tong Xiong , Wang Xiao , Deng Zheng Bin , Xie Xian , Xie Feng
Published: December 2012

With the continuous depletion of primary tin ores, tin tailings has become an important source for the production of tin; however, the large-scale utilization of tin tailings is disappointedly scarce, due to its leanness in valuable minerals and insufficient methods available for processing such low-grade tailings. A flotation process has been used on a laboratory scale to investigate the effects of various reagents such as salicylhydroxamic acid, lead nitrate, sodium hexametaphosphate and pine oil on tin recovery at neutral pulp. Because cassiterite is friable and a large amount of fines and slimes were generated, usually de-sliming is used to prevent slime coating and to increase the recovery of tin. However, analyses have shown that fine particles in the sample mostly contain tin, thus de-sliming was not suggested. By applying the process, ultrafine cassiterite could be efficiently recovered from the slime tailings, and the concentrate assaying 1.82% Sn with a recovery of 76.90% was obtained.
Conveying Characteristics of a New-Type Dry Separator
Authors: Zhu Xue Shuai , Wei Lu Bin , Wang Yan
Published: December 2012

The bed stiffness and install angle of the separator were determined by experiment. The high stiffness distributor with 6.5° reverse angle is suitable. Heavy product conveying velocity and efficiency were investigated at various air flows and throwing indexes. The results show air flow and throwing index have significant effect on velocity and efficiency in the conveying. When the conveying time was 20s, with the increasing of air flow and throwing index, the velocity and efficiency improved accordingly. Accordingly, when the conveying time was up to 40s, the efficiency tended to be stable and was above 90%.
Study on Preparation of Water-Soluble DRA for High Water Heavy Oil Well and Field Application Evaluation
Authors: Long Zheng Jun , Fu Ya Rong , Li Dong Qing , Fu Li Xia , Fu Qian
Published: December 2012

The high water content of heavy oil emulsions are O / W or W / O unstable estate, to solve the problem of heavy oil wells in the viscosity, after a large number of laboratory tests, a water-soluble drag reduction agent(DRA) with excellent drag reducing effect for high water heavy oil well is developed. The water-soluble DRA does not have combustible nature and solves also the problem of the security risk commonly used lower flash point viscosity reducing agent in paraffin oil well. The formulations and preparation method of the water-soluble drag reduction agent are introduced and the field applications are evaluated in this paper. The applications of more than 110 oil wells in Fifth Oil Production Plant in North China Oilfield have shown that the heavy oil viscosity reduction and drag reduction effects of water-soluble DRA are remarkable, and the hot wash cycle of oil well is prolonged.
Identification and Distribution of Lower Cretaceous Source Rocks in Ying’er Sag, Jiuquan Basin
Authors: Zhou Yi Bo , Liu Guang Di , Zhong Jia Yi
Published: December 2012

Based on the sequence stratigraphy study, the relation between dark mudstone ratio and sedimentary facies in different system tracts is observed and used to forcast the distribution of dark mudstones in the main formation combining with seismic data and well log. However, not all dark mudstones can generate hydrocarbon, so the source rock quality is quoted to calculate the thickness of the source rock within mudstone. The results show that the favored source rock in lake progressive system tracts and the bottom of highstand system tracts of Xiagou Formation and Chijinpu Formation are related to a group of reflectors with medium-strong amplitude, medium-low frequency and medium to comparatively good lateral continuity. The source rock of Xiagou Formation with high organic content and wide-range distribution is the major hydrocarbon source in Ying’er Sag, while Chijinpu Formation with thick dark mudstones is the potential source rock and the target of the further exploration.
Prospecting Direction and Geological Characteristics of the Jiwa Area, Nima County, Tibet
Authors: Wang Jian Guo
Published: December 2012

It is a low degree of geological studiedness in Jiwa area, the published synthesis and other reliable data is rare. By adopting similar analogy and comprehensive analysis methods, it found that the content is the highest about Au, As, Sb, Cu and W based on the relationship of the distribution of elements and time, this characteristic has reflected the evolution characteristics of carbonate in Palaeozoic in this area. The content is the highest about Pb, Zn, Ag and Cd in volcanic rock strata in Paleogene-Neogene, it reflected that the characteristic of elements associations related to intermediate-acidic volcanic activity. The content is the highest about Au, Ag and Sn in strata in Quaternary, which would forms gold deposits (spots), it reflected mainly the characteristic of elements mineral enrichment related with weathering origin in period. There are three minerals-ore combination types of wolframite-molybdenum-bismuthinite-chalcopyrite-pyrite quartz vein type, wolframite-molybdenum-bismuthinite-chalcopyrite-pyrite mica-quartz type, tungsten-molybden- limonite ores-oxidised type. Prospecting direction is Au-Pb-Zn hydrothermal filling type, the Cu deposit of sand-type and skarn-type copper polymetallic deposit. It has very important theory and real sense via scientific investigation of main geologic characteristics and metallogenic models research in Jiwa area.
A New Model of Critical Liquid Carrying in Gas Wells
Authors: Liu Rong He , Zhang Ben Quan , Feng Wen Guang
Published: December 2012

Based on the Turner’s liquid-loading model for gas wells, combined with Liquid Membrane Breaking Theory and Law of energy Conservation, a new liquid-loading model for mist flow in wave shaped crushing mode for gas-liquid wells was put forward, and a new equation for critical liquid-loading gas flow rate estimation was derived. The results show that the lowest conditions for liquid loading is that most of liquid drops can continuously move upward in gas flow, and when radii of liquid drops are smaller than 1600μm, liquid drops in the wellbore are basically in spherical shape. The critical liquid-carrying gas flow rate, in gas wells, calculated with this new model, is more reasonable and accurate.
Application of Combination Forecast Model in Polymer Flooding Oil Production Prediction
Authors: Ding Xian Feng
Published: December 2012

Results of polymer flooding oil production forecast will directly affect annual planning and long-term planning deployment in oil field development, so the choice of forecasting model is particularly important. On the basis of briefly introducing the optimal combination forecast model, the optimal combination forecast model is established based on the Weibull prediction, HCZ prediction and generalized Weng forecasting methods. The weight coefficient of the optimal combination forecast model is determined by the criterion of the minimum square sum of the forecasting error. It realizes that the production prediction model is optimal combination. The precision of the optimal combination forecast model is compared and analyzed with the other prediction models, such as Weibull prediction model, HCZ prediction model and generalized Weng model by using the real data. It proves that the optimal combination forecast model of polymer flooding is effective and practical.
The Application of Geological Reserve Abundance in the Research of Remaining Oil
Authors: Fu Cheng , Huang Bin
Published: December 2012

This template explains and demonstrates how to prepare your camera-ready paper for Describing the distribution of remaining oil quantitatively by applying geological reserve abundance has been put forward this paper, which can avoid the one-sidedness when describing the remaining oil by remaining oil saturation, so as to provide reliable basis for tapping the potential of remaining oil. By using this method in the study of remaining oil in the west of South-eight Block, the effectiveness of measures used for tapping the potential of remaining oil has been enhanced and the development effect also has been obviously improved. Therefore, this method has certain significance to the description of the remaining oil.
Controlling Factors for Reservoirs Distribution of the Putaohua Oil Layer in the Saozhao Sag
Authors: Sun Yu , Ma Shi Zhong , Yan Bai Quan , Chen Chen
Published: December 2012

Types of found reservoirs and its distribution characteristics of Putaohua oil layer in the Sanzhao Sag were analyzed. The controlling factors of hydrocarbon distribution were investigated. Sanzhao Sag is Sag-wide oil-bearing, but its distribution of oil and water is extremely complicated. The reservoir types are mainly fault block reservoirs, low amplitude structure reservoirs, fault-lithologic reservoirs and lithologic reservoirs. The distribution of reservoirs is mainly controlled by three geological factors: first, long-term inherited nose-like structure is predominant direction of petroleum migration; it induced oil and gas migration at a critical period of hydrocarbon accumulation and formed oil-gas accumulation area. Second, fault across main-line of hydrocarbon migration and high angle skew plug off hydrocarbon, and its side adjacent to Sag is a large number of hydrocarbon accumulation areas. Third, multi-fault region can easily form a fault (-lithological) reservoir accumulation area in the slope of sag.
Optimizing Well Spacing Using Srkachef Relational Expression
Authors: Song Heng , Zhao Lun , Fan Zi Fei , Wu Xue Lin , Li Jian Xin
Published: December 2012

With the remarkable improvement in recognition concerning the feature of the reservoir, a comprehensive adjustment is required to be made during the process of field development. Among currently prevalent methods, well pattern thickening is regarded as the most effective way to maintain or boost the oil productivity. However, to avoid the consequent high development cost of this method, optimizing a reasonable well spacing becomes a necessity to ensure a desirable effect of exploitation as well as an advanced level of economic effectiveness. In this paper, the author sets Zhanazhol Oilfield as an example and uses Srkachef relational expression to provide an accurate method, in which gives a detailed illustration about optimizing economic limit well spacing and economic optimal well spacing in different thickness reservoirs. Given its favorable adaptability, this method will become a valuable reference for the oilfield development in relation to well pattern deployment and thickening in late period.
The Enrichment Mechanism of PGE and Characteristic of MSZ in HW Mining Area in Great Dyke Zimbabwe
Authors: Zhang Wei , Zhu Gu Chang , Wu Yan Zhi
Published: December 2012

Zimbabwe Great Dyke is a mafic-ultramafic lithosome intruded the Zimbabwe Craton. MSZ(Main Sulfide Zone) is the most important layer which contains substantial amount of PGE(Platinum Group Elements). PGE are concentrated in bottom of MSZ layer because of the intimate relationship between the content of Cu&Ni and enrichment of PGE. Acid vein rocks did not formed in the same period with the ore and adjacent rocks. Plenty of sulfide can be found in MSZ in pyroxenite, Sulfide in ore was owe to homogeneous of geochemistry process in the magamtic segregation cycle, while them in gabbro and fractures were simply by the post magmatic thermal solution activities.
The Effects of Gap Size on Flooding in Vertical Narrow Rectangular Channels
Authors: Li Xi Chuan , Sun Zhong Ning
Published: December 2012

In this paper, counter-current gas--liquid two-phase flow and onset of flooding in vertical narrow rectangular channels were studied. In order to study the flow pattern, during counter-current flow and determine conditions associated with the onset of flooding, the flow pattern and pressure drop were investigated by visual experiments. The results show that the flow characteristics and the tendency of pressure drop in vertical narrow rectangular channels were similarly with the conventional channels. However, the maximum of pressure drop appeared at the completed carrying up of flooding in vertical narrow rectangular channels, and it appeared at the onset of flooding in conventional channels. Flooding gas velocities decrease as the gap size decreases; The gas velocity required for flooding increases as the gap size increases at the same liquid flow rate.
Finite Element Analysis of the Base of the Auxiliary Supporting Equipment of the Self-Propelled Road Header Based on ANSYS
Authors: Luan Li Jun , Qi Jian Feng , Ma Mu Jia , Gu Xin Yue , Yao Li Ze
Published: December 2012

Through the static analysis of the base of the auxiliary supporting equipment of the self-propelled road header, by ANSYS software base are static finite element simulation calculation. The finite element simulation method in the research that the move of roadheader auxiliary support base on the reliability of the static equipment is Reliability and accuracy. For accurate analysis self-advance of roadheader auxiliary support equipment of static base provides an efficient way
Research of Moving Table with Aluminum Foam-Filled Structure
Authors: Xu Ping , Xiao Zhen , Tan Hai Nan , Yu Ying Hua
Published: December 2012

In order to explore the changes of static and dynamic characteristics of machine tool components in which aluminum foam material was used, the characteristics of the prototype table and filled structure one was analyzed by ANSYS.It is shown that static and dynamic characteristics of machine tool can be improved by using aluminum foam-filled structure.Compared with cast iron material,the inherent frequency of table with aluminum foam-filled structure significantly improved,resonant response amplitude has decreased.It was accord with the requirements in the lightweight and high dynamic performance under the condition of ultra-high speed processing.
Parametric Modeling of Transition Tube with Constant Section Area along Straight, Circular and Oblique Central Route on CATIA
Authors: Meng Xiang Bao , Wang Lei , Pan Zi Jian
Published: December 2012

Parametric modeling of transition tubes were implemented based on constant cross section area assumption along the main central routes on CATIA software. The key objective of modeling these similar structures is to provide more geometric configuration options and modifications of micro channels for multi phase flow systems. The modeling processes were parameterized and analyzed by CATIA “Generative Shape Design” module with the help of “Parameters” and “Relations” functions. The surface models are all designed in circular cross sections that are constrained in two ways: one is perpendicular to the main central routes of the tube for planar transitional junction, and another is, perpendicular to the sub-branch central routes for oblique transitional junction three dimensionally. Next work is emphasized on numerical simulation and experimental investigation with these geometric structures in a multi phase flow system.
The Selection of High-Power Shearer Output Shaft Bearing and the Roller Bearing Selecting Expert System
Authors: Zhao Li Juan , Chen Lu
Published: December 2012

This paper is based on a coal winning machine cutting part simulation project cooperated with a mining machinery group. Because of coal winning machine actual working environment is very bad, the objects’ physical and mechanical properties are quite uncertain, coal winning machine output shaft bearing vulnerable to damage, so choose the right bearing is very important. In this paper, the output shaft bearings’ stress is calculated by Matlab and the concrete working condition is analysed, mainly to bearing life, as a supplement to clearance, precision, and price and so on, then the types of the output shaft is determined. In the Visual C6.0 integrated development environment, judge principles can be translated into the computer program statements and input them into the MFC software to create roller bearing selecting Expert System. Friendly interface realizes a direct and fast man-machine dialogue in Visual C6.0, and you can find the suitable bearing type quickly by inputing bearings’ basic parameters in the environment which under the control of the process of reasoning.
Based on Pro/Toolkit Parametric Design of the Longitudinal Roadheader Cutting Head
Authors: Zhao Li Juan , Wu Zheng Jun , Tian Zhen
Published: December 2012

Through to the analysis and design of cutting head, three-dimensional molding software Pro/E as the foundation, and vc++6.0 as a Second development tools, as well as achieved automatic update and assembly of the parts of cutting head, and shorten the design cycle.The environment of achieving cutting head in parametric CAD,the coal industry special equipment for coal mine normalized components parametric design has the great significance,for parametric designed of other products, provided valuable experience, great value.
IEC61850-Based Analysis of Coal Mine Ground Transformer Substation Integrated Automation Communication System
Authors: Gao Yong Xin
Published: December 2012

Places of importance of coal mine ground transformer substation in mine electric power supply, according to this article the IEC61850 standard, through the analysis of the function of substation secondary equipment, from the structure of integrated substation automation system-oriented, hierarchical and logical interfaces and interoperability focus analysis of IED, making coal mine ground transformer substation integrated automation communication systems tend to be reasonable. This article is intended to point out that the IEC61850 standard application supports peer to peer traffic patterns, GOOSE information transmission mechanisms will be hard to be effective in reducing IED device wiring, greatly simplifies design and experiment of secondary system for engineering application interoperability between different manufacturers when IED provides effective support.
Numerical Simulation and Test Research on Knurl Interference Connection
Authors: Zhao Jun Jie , Lu Zhai Jun , Xie Su Chao
Published: December 2012

In this paper, the knurl press fit connection for motor shaft have been researched through numerical simulation and test method. A shaft with knurl press fit have been built in 3 dimensional and a finite element model then been built based it. The press in process been researched deeply and a verification test have been made to compare. After compare the calculated result and test result, the difference between simulated result and test result was small, then the relationship between interference value of press fit and max transferred torque moment was researched. The method used in this paper can be a way to research knurl press fit.
Design of Drilling-Slotting Equipment with High-Pressure Water Jet for Coal Bed
Authors: Tang Zhi , Pan Yi Shan , Gong Shao Qi , Tang Ju Peng
Published: December 2012

Aiming at the problems of high stress, poor permeability and low gas drainage rate in deep mining, An integrative equipment is designed with high-pressure water jet, based on the principle of drilling, slotting, pressure relief and improving permeability together with the high-pressure water jet. This equipment can realize high-pressure drilling, low pressure punching, 360° high-pressure slotting and so on. In the multifunctional spray head, more slotting nozzle sections improve the slotting efficiency; also enhance the press-relief and permeability effect. The noise elimination cover decreases machine noise and improves the work environment. This equipment has important significance to improve gas drainage rate and prevent the dynamic catastrophe of the coal-bed.
Effect Research of Leg Arrangement Mode for Mechanics Analysis of 2-Legs Shield Powered Support
Authors: Li Ming Zhong , Niu Yan Qi , Xin Jia Xiang , Wang Chun Yan
Published: December 2012

The leg arrangement mode has impacts on several mechanics parameters of 2-legs shield powered support, which would lead to bad effect on coal mine safety production if unreasonable. In this paper, the mechanics model of 2-legs shield powered support has been established; the influence of inclined angle and position of leg on the resultant force of the canopy, the canopy resultant force action point , and the load intensity on the front edge of base for 2-legs shield powered support base has been analyzed. The research can provide theory basis and feasible method for reasonable leg arrangement.
Study of the Wheel of Abrasive Belt Based on Forming Polishing Technology
Authors: Wang Ke , Zhao Zheng Qing , Sun Xing Wei
Published: December 2012

The wheel of abrasive belt is a special-shaped coated abrasive which has the advantage of good polishing quality, long life, and high efficiency, low cost and so on. Base on the features of the wheel of abrasive belt, through analyzing the basic motion relation of forming polishing spiral surface screw, the wheel of abrasive belt’s profile shape curve could be calculated by establishing the contact line equation of screw spiral surfaces with the wheel of abrasive belt rotating surfaces. Software to verify the correctness of the profile shape calculated, and in accordance with the wheel of abrasive belt profile shape curve to programming NC program. Start with the dressing experiments of the wheel of abrasive belt. Through analysis and research to get the wheel of abrasive belt’s profile shape curve meet the forming polishing standard.
Impact Dynamic Analysis of Horizontally Vibrated Conveyor with Coulomb Friction Modeling
Authors: Song Chao Sheng , Huang Qi Ming , Gao Zhan , Xu Jie
Published: December 2012

This paper introduces dynamic impact analysis as an effective technique for studying the response of horizontal vibrated conveyor with time-varying impact excitation by the falling of the scrap. A two degree-of-freedoms impact dynamic model is formulated considering the static and dynamic coulomb friction between the scrap and chute. Then the time integration algorithm was applied in the program to solve the dynamic equations. Using the proposed method, the impact effects of ideal single scrap and multiple scraps on the dynamic response of the conveyor were analyzed. Computational results reveal numerous interesting dynamic characteristics which can be used to forecast and control the vibration of the scrap and conveyor system.
Structure Optimization on Sensitivity Analysis for Ultra-Supercritical Bypass Valve
Authors: Yu Long , Yu Shu Rong
Published: December 2012

Given mathematics model and boundary conditions of the structure optimization for ultra-supercritical bypass valve (UBV) in operation. FEM results showed that 10 design variables and 178 sampling points are chosen for iteration, and the relationship between maximum equivalent stress and structure parameters are obtained by sensitivity analysis. By using Monte-Carlo method, the quantity of optimized sampling point can be reduced by 17% and calculation time is reduced clearly. The higher sensitivity parameters affecting target function are found by contrasting response degree, and improving the parameters directly is the way that enhances intensity of the UBV. Base on the sensitivity analysis, the linearized equivalent stress of weak place in the UBV can be reduced by 44% with the safety performance enhanced.
Dynamic Characteristics of the Backhoe Excavator Bucket Based on Pro/E and ANSYS
Authors: Wang Chun Hua , Gao Yang , Zhang Ying Ying , Li Cheng Long
Published: December 2012

In this paper, the actual working conditions in the excavator bucket load in the mining process and foreign load has random features of Pro/E and finite element analysis software ANSYS to establish the bucket entity model, based on rock mechanics, material nonlinear analysis theoretical Construction of the soil constitutive model simulation, and the bucket of the different movement of the force, respectively bucket two main conditions the stress and displacement contours and analysis of the ultimate stress values and bucket stress characteristics is to improve the bucket force and work performance, improve safety and efficiency of the bucket work to provide a basis.
Thermodynamic Analysis for Organic Rankine Cycle Recovery System in Industrial Waste Heat
Authors: Yang Xin Le , Dai Wen Zhi , Ren Chang Zai
Published: December 2012

For recovering low temperature waste heat from industrial process efficiently, the organic Rankine cycle (ORC) was puts forward to use for thermal power generation. The flue gas parameter of waste heat from a cement kiln was set the research object and ORC system thermal analysis model was established using R123 as working fluid. A calculation program was carried and two main factors were given and the influence rules of thermodynamic performance were analyzed. The results show that the net work of system increases first and then decreased with the evaporating temperature and pressure and a parabolic rule is formed. The maximum net work is 4510kW and corresponding optimum evaporating temperature and optimal evaporating pressure are 140 °C and 1.46MPa respectively; The thermal efficiency increases with evaporating temperature and evaporating pressure increasing. The highest thermal efficiency can reach 12.68%.
Research of Rock Mechanical Mechanics in Steeply Dipping Seam Mining
Authors: Liu Jun , Yue Gao Wei
Published: December 2012

In steeply dipping working face rock movement, failure characteristics and distribution law of abutment pressure obviously affects seam mining. This paper takes the long wall for large inclined angle fully mechanized face of coal mine as the project background. The theoretical analysis and numerical simulation are adopted to study the break mechanism of the rock layer in steeply dipping seam mining; Through the numerical simulation results shows that the basic features are obtained, which are the biggest stress coefficient, abutment pressure of plastic area, roof weighting step，and convergence between roof and floor in working face．Based on the pressure appearance of the steeply dipping seam mining, control technology is given for the working face support stability, the work equipment prevent tumble and glide，and adjacent rock in the period of pressure. The study has a practice meaning in reducing coal mining accidents and improving the safety in steeply dipping seam mining.
Research on Module Selection Method in the Modular Design of CNC Machine Tool
Authors: Zhang Chao Biao , Wang Peng Jia , Sheng Zhong Qi , Liu Yong Xian
Published: December 2012

In modular design of product, seeking the optimal matching module and realize the optimal combination of product configuration is very important. This paper analyzes the module selection strategy in modular design of CNC machine tool, give the module selection algorithm. Relevant theory of fuzzy similarity optimal ratio is introduced on the search for the optimal matching module, and module selection system is developed by MATLAB. Finally, through an example, prove the effectiveness of the proposed algorithm and convenience of module selection system.
The Research on Instant Contact Deformation of Round Link Chain Based on Symmetric Penalty Function Method
Authors: Li Wei Kang , Mao Jun
Published: December 2012

In order to analyze deformation and stress state of round link chain which it is generated by instant impact for sudden loading between the chains during the working condition, the method of symmetric penalty function was adopted to analyze contact between round link chains; and the finite element software ANSYS LS-DYNA was further used to carry on nonlinear contact analysis, the displacement curves , the stress and deformation with time were gained during the process of impact by simulating the process of the instant impact of chains. The results show that it is circular to the contact area of round link chains and it is the main reasons of damage that the greater stress and deformation of impact is caused when time lasts 0.05s through theoretical analysis and finite element analysis software. The theory equations of load conditions and the method of finite elements can provide a theoretical basis and simulation methods for analyzing the round link chain driving in a variety of different working conditions under the conditions of impact.
Finite Element and Modal Analysis of Key Components of Horizontal Vibrating Centrifuge
Authors: Ren Lan Zhu , Zeng Lin Lin , Zhang Xin
Published: December 2012

This article analyzed the finite element on horizontal centrifuge of VM1400, established finite element model of the corresponding parts and gave the vibration modes of the various movements. Through the stress, strain, displacement calculation and modal analysis of the various components, the conclusions include that the level 1 of the vibrating body and the secondary vibrating body do the regular axial horizontal linear reciprocating motion, there is relative displacement between the two bodies, and the vibration frequency is close to the operating frequency.
Fault Tree Analysis on Hydraulic System Causing Fire of Heavy Self-Dumping Truck
Authors: Su Chang , Su Wei Jia
Published: December 2012

The fire accident of heavy mineral self-dumping truck is one of the most serious disaster in mine safety production. Research on the reasons that cause fire accident is an important study for ensuring safety production. By analyzing three elements that constitute self-dumping truck fire accident, the characteristics and easy ignition points as well as major combustion parts of self-dumping truck fire accident, we confirm that the hydraulic system leakage is the major factor that causes fire. To find out the fault reason of hydraulic system oil leakage, we analyze the composition and working principle of self-dumping truck, establish leakage fault tree of hydraulic system. Based on logic relationships between each fault and fire, we get the following conclusion: hydraulic tubing damage is the highest probability event that causes oil leakage fault. In addition, we should pay attention to spare parts management factor, correct driving factor and equipment management factor. We also propose the prevention measures of leakage and fire
Simulation Analysis of Large Forging Equipment Cartridge Valve
Authors: Dong Rong Bao , Li Zheng Chun , Xu Wen Xin , Xie Miao
Published: December 2012

For the purpose of optimizing the dynamic characteristics of large forging equipment multilevel cartridge valves, according to the structure and principle of the Rexroth’s LC series cartridge elements, using AMESim simulation software, the influence of forging equipment cartridge valves switching characteristics be discussed respectively from the damping R2, the damping R1, the load pressure. The results show that the damping R1, the damping R2, the system pressure, and the work load to cartridge valves switching characteristics have certain effect. The research gives a method for analyzing and adjusting the cartridge valve response characteristics.
Diagnosis and Management of the Polluted Hydraulic Oil
Authors: Kang Wen Long , Wang Yang
Published: December 2012

Hydraulic technology is widely applied in various fields of national economy, so the performance of hydraulic system directly influences all aspects of the economic benefits. The status of hydraulic oil is important for the working performance of hydraulic system.The pollution of hydraulic oil is a reason，which causes the fault of hydraulic system And it will cause the failure of system and loss of benefit. So it's very important that the fault of hydraulic system be diagnosed and treated. This paper introduces hydraulic oil pollution and the method of diagnosing and treating it.
Based on Fluid Digital Transmission and Control Theory on Application of Digital Hydraulic Valve
Authors: Li Wen Hua , Du Yu Ling
Published: December 2012

A digital hydraulic valve is a new control theory and method, it is through the electronic control unit installed in a conventional valve, and integrated processing, the formation of a wide variety of digital valve，By the digital-to-analog conversion element is directly connected with the computer. Using the computer output pulse number and frequency to control electro hydraulic system pressure and measurement. The system proposed can make the hydraulic system has the advantages of high efficiency, high speed, high reliability. And used Matlab/Simulink software to control system performance simulation analysis, experiment and simulation results show that, this system has great application prospect and practical value.
Preparation and Tribological Properties of Nb1-xTixSe2 Micro/Nanoparticles
Authors: Liang Jia Qing , Li Chang Sheng , Tang Hua , Zhang Yi , Li Wen Jing , Hu Zhi Li , Wang Fen
Published: December 2012

Nb1-xTixSe2(x=0～1) micro/nano-particles have been successfully prepared via solid-state thermal (750°C) reaction between microsized Nb, Ti with Se powders under seal environment in a seal quartz tube and characterization by X-ray diffractometer and scanning electron microscopy. It was found that the morphologies of the as-prepared products changed from microplates to micro-nanoparticles or aggregations composed of layer structure with the doping of Ti. And the amount of regular hexagonal microplates evidently reduced and nanoscaled particles increased with the increase of the contents of Ti dopant within a certain limit (1-20 atwt. %). The tribological properties of the as-prepared products as additives in paraffin were investigated by UMT-2 multispecimen tribotester. By the addition of Nb1-xTixSe2micro/nanoparticles in paraffin, the antiwear ability was improved and the friction coefficient was decreased. The paraffin with Nb1-xTixSe2micro/nanoparticles showed better tribological properties than that with pure NbSe2. A combination of the molecule-bearing mechanism of sliding friction, and fill in-repair work between the rubbing surfaces can explain the good friction and wear properties of Nb1-xTixSe2micro/nanoparticles.
Study on Using Independently Developed Equipment for Mine’s Axial-Flow Main Ventilator Performance Test
Authors: Ni Wen Yao , Meng Zhao Zhao
Published: December 2012

Performance test for operating mine’s ventilators are generally on-line, hence the test effect mainly depend on a full-prepared anemometry that should find a section where ventilating current is relatively still. While in the condition of on-line test, the only appropriate test site is in the annular contraction section of the leading device; but this section does not have an enough sectional area to fixate Pitot tubes. Therefore, the key to measure the performance of the ventilator is to develop a special equipment to transmit the wind pressure, and replace old Pitot tubes to install in the leading device. This paper introduce the design principle and manufacture method of this independently-developed wind-pressure measuring equipment, meanwhile calibrate the pressure transmission’s effect with standard Pitot tube and put this equipment in practical. After field measurement, the equipment can effectively transmit wind pressure, and its characteristic performance curve tallies with the standard one, therefore attain the final goal of measuring a ventilator’s wind pressure. Furthermore, in different specifications of ventilator, the equipment can adapt itself to different physical dimensions of annular contraction section. All in all, the equipment is scientific, reasonable and easy to be popularized in the mechanical ventilation mines.
Research on the Differences of the Pore Characteristics with Different Destroyed-Type Coals
Authors: Qi Ling Ling , Wang Zhao Feng , Yang Hong Min
Published: December 2012

In order to investigate the pore characteristics of the different destroyed-types of coals and its effects of coal and gas outburst, this article studyed the low temperature nitrogen adsorption curve, specific surface area, pore volume and its distribution with the method of low-temperature nitrogen adsorption, also studed their changes with the different destroyed-type of coals, and the influences of pore shape and distribution for coal and gas outburst. The results showed that three different destroyed-types of coals have loops, the pore shapes of the coals mainly open-shaped, maybe also contain the flask-shaped. The raw coal has more open-shaped pores, fragmentated coal contains a large number of micropore, the crushed coal richs micropore and mesopore. The crushed coal in the large aperture of the medium relative pressure range mainly has open-shaped pore, then in maller pore size range of low relative pressure mainly has closed pore. With the increasing of destroyed-degree, the porosity increased, the anti-destruction capability reduced, the coal is more easily broken, then the risk of outburst is greater.
Finite Element Analysis and Optimization Design of ZY5600-16-34 Hydraulic Support’s Shield Beam
Authors: Pu Zhi Xin , Deng Quan Gang
Published: December 2012

Taking the ZY5600-16-34 hydraulic support as the research object, using Pro/E software to build its shield beam’s three-dimensional model, and use ANSYS software to take finite element analysis on intensity of the shield beam. Then optimize its structure based on this. Through taking new finite element analysis on the new model, the results show that the optimization design is effective to increase the strength of shield beam's damageable parts, to provide a beneficial reference for the shield beam’s design.
The Design of Intelligent Charger for Electric Car
Authors: Sun Yuan Jing , Xiao Meng , Li Na Na , Yang Cui Ying
Published: December 2012

This thesis designed a high degree of intelligence charger to solve the Lead-acid batteries’ problems. The design of charger including two parts, hardware design and software design. PIC16F877 is the core control component in hardware part, on this basis, design the corresponding peripheral circuits .And the designing of hardware circuit and driver software of the whole system is explained in detail.
Data Acquisition System Based on uC/OS-III Embedded System
Authors: Li Wen Hua , Zheng Jin Yu , Yu Chen
Published: December 2012

This paper presents a data collection system based on C8051F040 processor and real-time embedded operating system uC/OS-III. The hardware part design, uC/OS-III transplant process and notes, system processes are discussed in detail. This system takes the modular design ideas and reasonable task-assigned strategy, make software is easy to code and modify, realizes real-time, high speed data acquisition.
The Remote Monitoring and Fault Diagnosis System of Coal Mine Main Fan
Authors: Wang Hui , Zhao Di
Published: December 2012

In order to ensure the safety and stability of coal mine main fan’s operation, the system uses programmable controller PLC as the control core, uses integrated transmitter, the man-machine interface touch screen and PC configuration software, achieving real-time monitoring and state control of the main fan’s performance, state parameter, electrical parameter, and uses PowerBuilder 9.0 system development software to build the fan’s fault diagnosis expert system, realizing the comprehensive fault diagnosis of the fan, providing accurate expert advice and repair scheme. It uses advanced Ethernet technology to realize the communication between PC and scene control system. The realization of the main fan’s automation management ensures the stability and reliability of the fan’s running.
Intermetallic Compound Formation on Solder Alloy/Cu-Substrate Interface Using Lead-Free Sn-0.7Cu/Recycled-Aluminum Composite Solder
Authors: Somidin Flora , Mohd Salleh Mohd Arif Anuar , Ahmad Khairel Rafezi
Published: December 2012

Feasibility of using recycled-Aluminum (re-Al) as reinforcement particulates in Sn-0.7Cu is assessed by powder technology method, whereby re-Al particulates are produced from discarded aluminum beverage cans. This paper focuses on the intermetallic compound (IMC) formation study between the fabricated solder composite on Cu-substrate. Throughout this study, four different composition of Sn-0.7Cu/re-Al (0.0, 3.0, 3.5, 4.0 wt.%) were studied. X-ray diffraction (XRD) was used to analyze the IMCs phase formation between the interfaces. New IMC phase of Cu9Al4 was detected beside Cu6Sn5 and Cu3Sn in the composite solder samples. However, Sn-0.7Cu/3.0re-Al showed least formation of brittle IMCs compared to the monolithic solder.
Surface Morphology and Si 2p Binding Energy Investigation of Multilayer Porous Silicon Nanostructure
Authors: Mohd Radzi Ahmad Afif Safwan , Yarmo M.A. , Rusop M. , Abdullah Saifollah
Published: December 2012

Multilayer structure of porous silicon was fabricated using electrochemical etching method. Average thickness of multilayer structure was verified. Surface morphology from Atomic Force Microscopy (AFM) shows that surface roughness was decreased when higher etching time applied to the samples. Si 2p binding energies were corresponded to the composition of void within the silicon which prompted the formation of porous silicon nanostructure. Depth profiling technique from X-Ray photoelectron spectroscopy (XPS) was used for compositional determination of porous silicon layers since samples porosity varied according to current density applied during the electrochemical etching process. Multilayer porous silicon is a high potential candidate for Bragg grating waveguide device.