bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research and Application of Flocculant for Oilfield Wastewater Treatment Based on Fracturing Wastewater
Authors: Song Chunyan , Zhao Jingang , Huang Shan , Wang Xiaohui , Li Li , Meng Zhaoyu , Chen Chao 
Published: September 2020

Abstract
In view of the characteristics of high viscosity, high turbidity and high oil content in the oilfield fracturing operation wastewater, the Fenton oxidation-flocculation treatment method is used to reinject the fracturing wastewater, and the pH value, Fenton reagent and flocculation of the wastewater The dosage of agent and the time interval of adding flocculant to the effect of fracturing wastewater oxidation and flocculation treatment. The results show that: according to the conditions of 30% hydrogen peroxide (volume percentage) dosage of 0.2% and FeSO4 dosage of 20mg / L Fenton oxidation was carried out for 30min, and then flocculation treatment was carried out under the conditions of PAC dosage of 70mg / L, PAM dosage of 3mg / L, and stirring speed of 100r / min for 30min, then into the SBR reactor for 8h aeration and sedimentation for 1h, then treated The COD of post-fracturing wastewater decreased from 4132.92mg / L to 190.38mg / L, and its removal rate could reach 95.4%. The combined process has far better treatment effect on wastewater than the single micro-electrolysis, Fenton oxidation or flocculation process, and the method is simple and easy to use, and the utilization rate of the agent is high.
Development and Application of Petroleum Development Equipment Integrity Management System Based on Wireless Sensor
Authors: Fan Lu , Zhang Xiaohan , Yue Yu 
Published: September 2020

Abstract
This paper designs and implements a large-scale instrument and equipment monitoring system from the perspective of the current management of large-scale instruments and equipment for petroleum development. The system is interoperable with the current petroleum extraction equipment management system and the large life cycle management system of large-scale instruments and equipment, combined with wireless sensor network technology, real-time monitoring of large-scale equipment. The system facilitates the management of large instruments and equipment by large instrument and equipment management departments and improves the efficiency of petroleum development equipment management.
Comprehensive prevention and control of coal and gas outburst in south second well of Liziya coal mine
Authors: Wang Bo 
Published: September 2020

Abstract
Based on the analysis of the present situation and existing problems of coal and gas outburst in the second South well of Liziya coal mine, and adhering to the concept of comprehensive gas control, the field test and design of the main mining K1 coal seam are carried out respectively from the outburst prevention prediction sensitive index and critical value, regional outburst prevention measures, hydraulic fracturing permeability enhancement measures and local outburst prevention measures. The critical value of outburst prevention prediction sensitive index in the test area is: k1m = 0.40 Ml / g · Min1 / 2, Sm = 4.3kg/m; in the production area, the bottom rock pre drainage tunnel through layer drilling pre drainage, the coal tunnel through layer strip pre drainage, the double tunnel layout drilling pre drainage are used to improve the gas drainage rate by hydraulic fracturing and permeability enhancement measures, fundamentally eliminate the risk of coal and gas outburst, and realize the safe production of the mine.
Experimental study on the gas desorption law of lump coal in coal mine goaf
Authors: Dai Linchao 
Published: September 2020

Abstract
In order to accurately predict the coal mine goaf gas emission and evaluate the goaf gas resources, a self-designed atmospheric pressure coal desorption measurement device was used to conduct a long-term (lasting 140 days) gas desorption rule experiment of goaf lump coal, the effect of lump coal size on gas desorption law was analyzed. The research results show that the desorption rate of lump coals of different sizes (3cm, 5cm, 8cm, 13cm) has a negative exponential function relationship with time. And the cumulative amount of gas desorption basically increases with the increase of lump coal size, the initial gas desorption rate basically increases with the increase of the lump coal size.
Optimized design of new composite drill
Authors: Bai Zongxi 
Published: September 2020

Abstract
In drilling engineering, the timeliness of the drill bit is very important, which affects the drilling speed and drilling cost. This paper starts from the rock breaking mechanism of the drill bit and the feedback of on-site construction, and analyzes the relative position of the composite drill bit PDC blade-roller For the impact of mechanical drilling speed and load distribution, a new type of composite drill bit was optimized and designed to form a two-level cutting composite drill bit. The new composite drill is designed for two-stage cutting mode. The stepped wellbore after two-stage cutting produces an equivalent steering angle, which can effectively reduce local head loss. The new composite drill bit can increase the mechanical drilling speed, reduce the cost of oil and gas extraction, and adapt to the future drilling dynamic needs.
Structural characteristics and prospecting direction of coal-based graphite deposits in Feng county area, China
Authors: Wei Yunxun , Lv Lushi , Li Congcong 
Published: September 2020

Abstract
The Fengxian coal-based graphite deposit in Shaanxi province is located in the southern western section of the Northern Qinling Massif in Shaanxi Province and is an important graphite metallogenic belt in the Qinling massif. The results show that the main structural styles of the graphite deposit in Fengxian county, Shaanxi province are “S” - type folds, nappe structure and superimposed fold. After mineralization, it has experienced at least two strong tectonic movements. In the early stage, the compressive stress is dominated by near-NS direction, while in the later stage, the compressive stress is dominated by NWW direction, which is superimposed with the near-East-west fold. Combined with the characteristics of structural ore control, it is found that the focus of ore prospecting in the study area lies in the 5th and 6th strata of Caoliangyi Formation, east of Laochang.
Application of controlled blasting technology in mountain excavation under complex conditions
Authors: Qiao Wei 
Published: September 2020

Abstract
The blasting conditions of the site leveling project of a green power and renewable energy limited company are extremely complex. There are construction facilities on both sides of the excavated hill, and expressways and county roads on the front of the excavated hill. In order to control the impact of rolling stones, blasting vibration, blasting flying stones on surrounding buildings, bridges and culverts, pre-embedded industrial water pipes, highways and roadbeds during the excavation of mountain bodies, precise controlled blasting and comprehensive vibration reduction techniques such as weak loosening, controlling the maximum single-shot (single-segment) charge, hole-by-hole blasting, dispersed charge sectional blasting, axial spacing and radial uncoupled charge are proposed. Pre-splitting blasting technology is used to stabilize the slope in slope engineering and trench blasting technology is used in excavation of cut-off ditch. The technology guarantees the normal opening of the frontal expressway and county road during the excavation operation, and does not affect the safe production of the company. This technology guarantees that the excavation of mountain body will not affect the normal opening of frontal expressway and county road, and will not affect the safety of production of the company.
Analysis on the effect of comprehensive adjustments measures for the Second Type Reservoir in the Eastern Block of Beierxi
Authors: Yan Pei 
Published: September 2020

AbstractThe second type reservoirs in the Eastern Block of Beierxi were put into production in December 2005 and October 2009. The block, a total of three production stages: the first stage (September 2009 - January 2015) for the production of initial water flooding production stage, perforated SII1- SII15+16 reservoir groups, and product some series adjustments in November 2014, blocking SII1-9 reservoir group, opening SIII reservoir group; The second stage (From January 1, 2015 to May 8, 2015) is the pre-slug stage of polymer injection; The third stage (From May 8, 2015 to the present stage) is the ternary main slug stage, entering the effective period. This article based on the fine reservoir geological characteristics of anatomy, using fine geologic research results, combined with the notes in the process of ternary dynamic reflection, and we also targeted comprehensive measures in order to adjust the work, control water cut increase rate, improve the block effect situation, and ultimately maximize recovery.
Design and Experimental Research of the Inbuilt Oil Collection System for the Oil Spill Recovery Ship
Authors: Zou Yunfei , Zhang Panpan , Zhang Dewen , He Rui 
Published: September 2020

Abstract
The inbuilt oil collection system of the oil spill recovery ship is based on the principle of downward belt skimmer. The system adopts a composite structure, which is integrated with the downward belt skimmer and the upward belt device. The skimmer is used for oil recovery and the upward conveyor belt device is used for rubbish disposal. In this paper, experiments in the test hull and test pool were carried out to investigate the performance of the inbuilt oil collection system such as the recovery rate, the recovery efficiency and the waste adaptability. The test results show that the oil spill recovery system has the advantages of compact structure, high recovery rate and efficiency, high adaptability of garbage, high safety of operation and so on.
Research on the Sulfate-resistant Chemical Attack Mechanism of Concrete with Mineral Admixture
Authors: Yang Zhuo , Huang Yineng , Zhu Lie , Liu Tong , Xu Pan , Hou Zhenkun 
Published: September 2020

Abstract
Durability is the most important factor for evaluating the service life of concrete, and the chemical attack of sulfate is an important factor affecting the durability of concrete. In this paper, fly ash, slag, metakaolin and silica fume were used as mineral admixtures to explore their impact on sulfate chemical attack, and the chemical attack mechanism of sulphate was deeply analyzed, the results showed that: the incorporation of fly ash, slag, and silica fume effectively improves the sulfate-resistant chemical attack capacity of concrete. The concrete was chemically attacked 30d in sulfate solution, which will increased its compressive strength and quality, it was mainly due to the secondary hydration reaction of fly ash and slag, part Ca (OH)2 reacted with Na2SO4 solution to generate gypsum and ettringite, and made the internal structure of concrete more compact. As the age of sulfate chemical attack increases, the ettringite expands with water, and causes concrete to be expanded or peeled. Silica fume mainly provides more active SiO2 for the secondary hydration reaction, consumes more Ca (OH)2, and reduces the formation of ettringite.
Development Status and Technical and Economic Analysis of Ethanol Gasoline for Automobile in China
Authors: Li Zhenhua , Hu Xiaoting , Zhang Qingqing 
Published: September 2020

Abstract
With the shortage of petroleum resources and the aggravation of environmental pollution, the research of alternative fuel for automobile is paid more and more attention. As a relatively clean fuel, ethanol gasoline can significantly reduce the emission of harmful substances in automobile exhaust. Compared with ordinary gasoline, it has the advantages of high octane number, good antiknock performance and high oxygen content. But it also has disadvantages such as low combustion heat value, large latent heat of evaporation, corrosion to metals, poor and compatibility with some engine materials, etc. The three factors affecting the development of ethanol gasoline are resources, technology and economic benefits. Although China is the third largest ethanol production and consumption country in the world, its resource conditions are not as good as those of the United States and Brazil. Under the current market and industrial policy environment, the overall benefits of domestic fuel ethanol production enterprises are poor. Cellulosic ethanol technology is the key technology to restrict the development of ethanol gasoline. Only when the second generation of biofuels pass the economic test, can the use of ethanol gasoline be promoted nationwide.
Monitoring dynamic deformation of communication tower using photography dynamic monitoring system
Authors: Ge Yongquan , Yu Chengxin , Liu Xiaodong , Wang Ronghui 
Published: September 2020

Abstract
With the advent of next-generation cellular mobile communication technology, the world ushered in a new communications tower construction boom to protect the safe operation of the communication towers without delay. In this paper, we monitored the dynamic deformation of the communication tower using the PDMS (photography dynamic monitoring system). Results showed that the tower is integrity and stability; The deformation is conform to the China national standard. The PDMS can monitor the tower in a non-contact, it has a characteristic of strong robustness, excellent flexibility and low cost.
Study on the co-mining mode of coal and gas in protective layer of coal seam group
Authors: Yuan Benqing 
Published: September 2020

Abstract
In view of the occurrence conditions of coal seam groups in most mining areas in China, the protective layer mining mode is mainly adopted to carry out gas treatment in regional coal seam. In this paper, based on the pressure relief mining of the protective layer, the principle, type and geological conditions of the co-mining mode of the protective layer coal and gas under the condition of coal seam group are analyzed.
Study on the Performance of Fiber-Latex-Calcium Carbonate Whisker Gas Storage Cement
Authors: Wang Yu , Zhang Jingfu , Jin Chunyu , Chen Xun 
Published: September 2020

Abstract
A cement slurry system was designed and optimized in order to meet the strict operation and production requirements of the gas storage well cementing. System formula was G cement +1.5% filtrate reducer +1% dispersant +0.5% defoamer +10% calcium carbonate whisker +8% polychloroprene latex +0.08% polypropylene fiber +0.09%PVA fiber + water. Evaluation experiments showed that the engineering properties of cement slurry system were well, such as good rheology, low water loss, no free liquid, wide adjusted range of thickening time, good anti channeling ability and good suspension stability. The experiment results of cement mechanical strength showed that the 7 days tensile strength of the cement specimen was increased 62.3% higher than that of the neat cement grout, while the 7 days compressive strength was increased 47% and the elastic modulus was reduced 41.7% compared to the standard peak. The micro-structure and morphology of gas storage cement specimens were observed and the mechanism of cement strength enhanced by fiber, latex and calcium carbonate whisker were studied that fiber and calcium carbonate whisker bridged the cracks, reduced cracked tip stress concentration, effectively prevented the development and diffusion of cracks, enhanced cement deformability and reduced the elastic modulus; polychloroprene latex formed latex film on the surface of cement particles and fiber, which improved the cementing strength and the interface micro-structure between fiber and cement, reduced the stress concentration caused by mutant materials, improve the toughness of cement stone greatly.
Study on geothermal genesis in Juxian area, Shandong Province
Authors: Yang Huisan , Sun Yunchuan , Jiang Tianqi 
Published: September 2020

Abstract
In order to explore and develop geothermal resources in Juxian area, Shandong Province has studied the causes of geothermal in Juxian area. On the basis of field investigation, drilling and logging, and water quality inspection in Juxian area, the metallogenic conditions were analyzed from the aspects of geothermal source, geothermal storage, caprock, and geothermal channel formed by geothermal water, and finally the geothermal causes in Juxian area. The surface water and atmospheric precipitation in the study area infiltrated through the fault near the Yishu fault, and after 3,150 m deep circulation, the heat was obtained by the normal geothermal heating method, while dissolving the mineral components in the surrounding rock, and finally gathered in the Qingshan Group andesite, It forms high-quality hot mineral water rich in minerals such as fluorine, strontium, lithium, metaboric acid and metasilicic acid. The andesite caprocks of the Qingshan Group effectively hindered the loss of the geothermal water and heat energy of the geothermal water gathered here. The geothermal water enters the geothermal well through faults and strata dissolution holes, and surges up to the surface.
Analysis and optimization of hemispherical gable reconstruction scheme for old coal shed
Authors: Yang Chenguang 
Published: September 2020

Abstract
Nowadays, many old dry coal sheds are able to meet the structural safety requirements. However, due to the high requirements of environmental indicators in recent years, the open coal shed on both sides is unable to meet the environmental protection specifications. Aiming at the further closed design of the old dry coal shed, the design scheme is adopted, and the transformation scheme of the hemispherical gable wall is adopted, and the parameter optimization is carried out, which can be used for reference in the future design. And a wide range of promotion and implementation.
Study on the integrated system of prediction of the range of volcanic collapse in Changbai Mountain
Authors: Li Chengyang , Lang Qiuling , Zhang Fengshun , Zhao Dekun , Liu Honglin , Zhou Jun 
Published: September 2020

Abstract
In view of the large amount of geological data, dispersion and the lack of time-consuming and error-prone and other routine statistics, the scope of volcanic collapse in Changbai Mountain area is comprehensively calculated. Analysis of relevant impact factors, such as rock, slope height, slope, human factors, etc. Using UDEC to simulate collapse and then use SPSS software to predict the range of influence and to carry out linear regression. Then analyze its correlation and discreteness, draw the linear regression equation, establish the prediction system of the range of the volcano collapse of Changbai Mountain, and reach the database management and scope.
Influence of Topographical Factors on Spatial Distribution Characteristics of Soil Nutrients in Qinba Mountain Area
Authors: Hua Dongwen , Li Juan , Xu Yan 
Published: September 2020

Abstract
To study the spatial distribution characteristics of soil nutrients in different micro-topography and their correlation with topographic factors, to provide reference basis for soil resource nutrient management and ecological environment construction in other areas with the same topography. This paper is based on 150 soil samples from 3 main tea-producing areas in Shangnan County, and analysis methods such as sampling analysis of variance and correlation analysis are applied to soil organic matter, total nitrogen, available potassium, and available effects under different micro-topography (slope, aspect, and slope position). The spatial distribution characteristics of phosphorus were analyzed and the correlation between soil nutrients and topographic factors was explored. The results showed that the contents of soil organic matter, total nitrogen, available phosphorus and available potassium in the surface layer (0-10cm) of the study area were significantly higher than those in the middle and lower layers of soil, all of which were of moderate intensity variation. Soil total nitrogen, available potassium, available phosphorus and organic matter content are affected to some extent by slope, aspect and slope position. In general, soil total nitrogen, organic matter content and slope position are significantly negatively correlated (P <0.05), and the slope direction showed a very significant positive correlation (P <0.01), while the soil available potassium and available phosphorus had a negative correlation with the slope position and slope (P <0.05).
Research on Disaster Prevention Technology of Remote Sensing Image Segmentation of Ocean Big Data Platform Based on Internet of Things
Authors: Zhang Ying , Lu Kai 
Published: September 2020

Abstract
In order to further improve the ability of disaster prevention and mitigation informatization, this article starts from the idea of comprehensive planning and construction, draws on the physiological principles of modern division of labor, and clearly coordinates the various components of the Internet of Things. The Internet of Things, big data, artificial intelligence and other information technologies, based on the Internet of Things-based ocean big data platform remote sensing image segmentation disaster prevention technology research theory, proposed a smart marine engineering construction plan, from the construction of the marine environment 3D monitoring system Ocean construction data platform, development of marine application systems, information standards and specifications, plan design and many other aspects. The platform’s remote sensing image segmentation disaster prevention technology covers marine environmental protection, disaster prevention and mitigation, islands, marine law enforcement, marine economy, marine fisheries and many other commercial fields. The research results have been practiced in the construction of smart oceans in many coastal provinces and cities in China, and have important reference significance for the construction of smart oceans in other coastal provinces and cities.
Analysis and Application of Shock Absorption Measures for High-rise Inpatient Building of a Hospital in High Intensity Fortification Area
Authors: Luo Fajiang , Li Peng , Meng Zhaohu , Li Yong , Han Guangzhao , Xuan Du , Lin Zhijun , Liu Yuhong 
Published: September 2020

Abstract
A proposed 22-storey hospital building is located in an area with 8-degree seismic fortification and is a reinforced concrete frame-shear wall structure. Through the establishment of structural model, calculation and comparative analysis are carried out by using ETBAS and PERFORM-3D software. The viscous damping wall is used for energy dissipation and damping, and the optimal damping scheme is determined by multi round time history analysis and optimal adjustment of the number and location of dampers.
Analysis of Pit Corner Effect of Special-shaped Foundation Pit of Subway Station
Authors: Tan Junbin , Zheng Xiangyi , Sun Yang , Shao Guojian , Chen Yubo 
Published: September 2020

Abstract
Based on the deep foundation pit project of Maluan North Station of Xiamen Metro Line 2, a large number of monitoring points were set up to monitor the foundation pit in order to study the deformation law and the pit corner effect during the excavation of the special-shaped foundation pit. By analyzing on-site monitoring data and numerically simulating the excavation of special-shaped foundation pits, this study found that the lateral deformation of diaphragm wall and ground settlement at the corner of the pit all exhibited obvious pit corner effect. The maximum lateral displacement of the long-side diaphragm wall is slightly larger than that of the short-side diaphragm wall. The maximum ground settlement at the corner of the pit is less than the maximum ground settlement behind diaphragm wall. Moreover, the differential ground settlement around the pit corner is obvious.