bluuebunny/crossref_metadata_2025 huggingface dataset:
Clinical audit on medical treatment of infective endocarditis in Assiut University Children’s Hospital
Authors: Mohammed Nagwa A. , Zaki Basem S. , Ahmed Faisal A.
Published: January 2024

Background

Despite advances in diagnostic tools and therapy approaches over the last few decades, pediatric infective endocarditis (IE) remains a complicated condition. IE is associated with considerable morbidity and death.

Aim of the work

This research aims to revise the medical treatment of pediatric patients with IE who were admitted to the Cardiology Unit at Assiut University Children Hospital (AUCH) and how much it is adherent to the international guidelines of American Heart Association (AHA), in addition, to evaluate their outcome.

Subjects and methods

This clinical audit was conducted on 30 pediatric patients with IE who were admitted to the Pediatric Cardiology Unit, AUCH, Egypt from March 2020 to February 2021. In all, 76.7% of enrolled cases with IE received vancomycin 40 mg/kg per 24 h IV in 2 or 3 divided doses and 23.3% received Ceftriaxone at a dose of 100 mg/kg per dose IV or IM daily. Then the treatment was modified according to the blood culture sensitivity test for at least 4 weeks and up to 6–8 weeks in some cases. Transthoracic echocardiography (TTE) was performed for all cases at the beginning, and after finishing the treatment protocol. Evaluation for the development of complications among the studied cases was done.

Results

The median age of the studied participants was 7 years, 83.3% were males. According to Modified Duke Criteria, 73.3% had a definite diagnosis of IE, and 26.7% had a possible diagnosis of IE. All studied cases received immediate assessment, and general and systematic examination. The echocardiographic examination which was done revealed that 83.0% of the studied participants have no valvular lesions. After receiving the empirical treatment, all studied patients received antibiotic therapy according to the blood culture and sensitivity test results. A significant decrease in IVSD, LVESD, LVPWD diameters, and thickness, and a significant improvement in left ventricular systolic function (LVEF and LVFS) was observed in IE patients after receiving treatment. Other cardiac diameters show improvement but do not reach a significant level. Also, the vegetation size shows a significant reduction. Regarding the final outcome of the IE patients who were admitted to AUCH, 53.3% achieved recovery while 46.7% deteriorated.

Conclusion

The international guidelines for the management of IE-diseased children were successfully followed by the Cardiac Unit of AUCH, on average, 85.0% (as we used ceftriaxone as an empirical treatment which is not recommended by AHA), and are associated with a high success rate.
Evaluation of children with syncope
Authors: El_deen Zeinab M. , Nazeer Merna E. , Ahmed Faisal A.
Published: January 2024

Background

Syncope is one of the most prevalent paroxysmal disorders in children and adolescents. It is a transient, self-limited loss of conscious and postural tone that is followed by a full recovery spontaneously and without any neurological consequences.

Aim

The objective of this internal audit is to assess how much the staff at Assiut University Children Hospital (AUCH) are sticking to the agreed upon unit’s protocol regarding how to deal with children or adolescent with syncopal attacks.

Patients and methods

This clinical audit was conducted on 150 pediatric patients with syncope who were admitted to Assiut University Children Hospital, Egypt during the period from the start of January 2021 up to the end of June 2022. Data was systematically collected regarding medical history, general, and systematic examination including chest, cardiac, abdominal, and neurological examination. Duration of syncopal attack (minutes), prodrome history, related symptoms (as chest pain or palpitations), and triggers (as hyperventilation, pain, stress, or effort) were all collected.

Results

The mean age of the studied participants was 11.96 ± 2.47 years (range 1.5–15 years), with slight female sex predominance. The neurocardiogenic causes (vasovagal, VVS) were the main cause for syncopal attacks among our studied cases, followed by neurologic causes in 17.3%. Collectively, we could say that our institution is successfully following the recommended protocol of our institution for the management of syncopal attacks in children and adolescents.

Conclusion

The recommended protocol of our institution for the management of syncopal attacks in children and adolescents was successfully followed by the staff members at Assiut University Children Hospital.
Assessment of routine use of critical view of safety in laparoscopic cholecystectomy, prospective cohort study
Authors: Sayed Mostafa M. , Ewees Mohammed K. , Romany Abanoub K. Henry
Published: January 2024

Background

The reported frequency of biliary injuries has tripled to 0.4% since the advent and widespread usage of laparoscopic cholecystectomy in the 1990s. The goal of this study: in terms of practicality and safety, is to evaluate the effectiveness of a critical perspective on safety during laparoscopic cholecystectomy.

Patients and Methods

This prospective cohort research included 100 patients who received laparoscopic cholecystectomy between 2018 and 2021 at Assiut University Hospital and Assiut Police Hospital.

Results

According to the data, just one individual out of 100 suffered from bleeding, another from a bile leak, and no one suffered from liver or viscus damage.

Conclusion

The most secure approach to comprehend the triangle’s design is from the vital aspect of safety, and understanding so significantly aids in the prevention of ductal harm. Significant bile duct damage and accompanying complications may be avoided by employing Critical View of Safety in clinical practice.
Prevalence, correlates, and treatment gap of mental illnesses among middle age and elderly population of India
Authors: Jana Animesh , Verma Priyanka , Sinha Abhinav , Kanungo Srikanta , Pati Sanghamitra
Published: January 2024

Introduction:

Mental health issues are increasing globally and low- and middle-income countries contribute 80% of the total burden. In India, the proportion of mental illnesses contributing to the total disease burden has become twofold since 1990. Despite this high prevalence, a greater part of the affected people are deprived of proper care. Henceforth, this study was planned to estimate the prevalence of mental illnesses among middle age and older adults of India and determining the treatment gap across people suffering from various mental illnesses.

Methods:

A cross-sectional analytical study was conducted using the data from Longitudinal Aging Study in India Wave I, (2017–2018). Regression analysis was done to understand the association of mental illness with different sociodemographic factors. Ninety-five percentage confidence interval were considered a measure of uncertainty.

Results:

The prevalence of mental illness was found to be 31.23%. About 65.67% of the participants having Alzheimer’s/dementia and 61.06% of the participants having depression were not receiving any treatment. Females, smokers, nonworking, participants with no formal education, and those living without partner are found to be at higher risk of developing mental illness.

Conclusion:

A larger proportion of the middle age and older adults in India are affected with mental illnesses and the majority of them are left untreated. Failing to overcome this, treatment gap can cause a rise in indirect economic cost leading to poverty. Therefore, it is imperative for India to invest more on mental health services.
Health literacy in low- and middle-income countries
Authors: Bruand Pierre-Emile , Magne Julien , Guerchet Maëlenn , Aboyans Victor , Preux Pierre-Marie
Published: January 2024

Health literacy (HL) is defined as a person’s ability to access, understand, appraise, and apply health information in order to make sound health decisions. It has emerged as a key determinant of health outcomes, more particularly in noncommunicable diseases (NCDs). Low HL has been associated with lower use of health-care services and poorer health outcomes, including increased morbidity and mortality. During the second meeting of the EMAC-AOC Group (Epidemiology of Chronic Diseases – Central and Western Africa), HL and NCDs in low- and middle-income countries (LMICs) were discussed to explore options for interventional studies in sub-Saharan Africa on NCDs’ prevention and control. We reviewed how HL is defined, how it is associated with health outcomes and health inequities, and what instruments are available to assess it. Several published studies, systematic reviews, especially in LMICs, as well as national and international recommendations were discussed to explore potential approaches to improve HL in a study evaluating interventions for the prevention and control of NCDs in Africa.
The profile of patients with undiagnosed type 2 diabetes mellitus in urban communities, South Trinidad, 2019–2020
Authors: Dharamraj Kavita , Jogie Jeremy , Chang Christopher , Rampaul Sarah , Roopchan Dylon , Ramlal Daniella , Wong Darien
Published: January 2024

Aim:

The aim is to profile patients with undiagnosed type 2 diabetes (T2D) mellitus in urban communities in South Trinidad, 2019–2020.

Settings and Design:

This cross-sectional study took place in grocery stores and malls in urban communities, in South Trinidad, from November 2019 to January 2020.

Subjects and Methods:

Adults between the ages of 40–60, body mass index ≥23 kg/m2; undiagnosed with T2D, and who gave informed consent were enrolled in the study, through convenience sampling (n = 86). The main outcome measures were glycemic states that were assessed using glycated hemoglobin clinical cut points of <5.7%, 5.7%–6.4%, and ≥6.5%. Differences in demographic, socio-economic, risk factors, and clinical measurements among glycemic states were compared using Chi-square test for categorical data and one-way ANOVA for continuous nonparametric data.

Results:

Eighty-six participants were included in the analysis: 54.7% were normoglycemic; 33.7% prediabetic and 11.6% were newly diagnosed diabetics. The mean (standard deviation) age was 50.36 (6.36), with more females (77.91%) and East Indians (56.98%). Hypertension was the most common comorbidity seen, 29.07%. Sixty percent of persons had a first-degree family history of T2D mellitus. At high risk for developing a chronic noncommunicable disease: 67.44% of females with a waist:hip ratio >0.85 and 19.77% of males with a waist:hip ratio >0.9. Alcohol consumption was linked to higher glycemic states (P = 0.045). However, no statistically significant correlations were found between all other risk factors assessed and glycemic states.

Conclusion:

There were no statistically significant associations for risk factors, except for alcohol consumption, among glycemic states.
No association between adult height and Parkinson’s disease
Authors: Jeong Younggee , Choi Seulggie , Park Sang Min , Hwang In Cheol
Published: January 2024

There is a relative lack of evidence on Parkinson’s disease (PD) associated with adult height. From the National Health Insurance Service-National Sample Cohort, data from 116,139 participants aged 40–80 years who conducted health examinations during 2002–2003 were extracted. Newly occurred PD events were identified during 2004–2013. During a mean follow-up of 9.7 years, 725 participants were newly diagnosed with PD. The crude model showed that taller individuals were at lower risk for PD, but the association became insignificant on adjustments for covariates, particularly age.
Prevalence of tobacco consumption among the Northeast population of India
Authors: Singal Kusum , Malik Vivek Singh , Sachdeva Meenakshi , Chauhan Anil , Singh Manvi , Rana Monika , Pradhan Pranita , Bharali Mintu Dewri , Singh Meenu
Published: January 2024

Background and Objectives:

Widespread use of tobacco among Indians has been associated with several lung diseases; however, the exact prevalence of tobacco use, particularly in the northeastern region of India, is not known. Therefore, we conducted a systematic review and meta-analysis to evaluate the prevalence of tobacco use among the northeast population of India.

Methodology:

Four electronic databases were searched using the appropriate search strategy. A systematic search yielded 15 articles that were included in this review. Out of these, 13 studies were found to be eligible for meta-analysis. Risk of bias was assessed using the Hoy et al. scale. Statistical analysis was done using the STATA version 16.

Results:

Data from 453,844 participants, mean age range of 15–60 years, were collected from the northeastern states. The overall pooled prevalence estimate for the tobacco consumption reported was found to be 44.71% (95% confidence interval [CI]: 16.48%–72.93%). Manipur reported comparatively higher tobacco consumption than the other eastern northeastern states 45.13% (95% CI: 7.26%–72.93%). A higher pooled prevalence was found for the employed (31.10%; 95% CI: 24.83%–83.00%) versus unemployed (26.96%; 95% CI: 22.07%–31.86%), and literates (40.36%; 95% CI: 16.19%–64.54%) versus illiterates (19.87%; 95% CI: 3.95%–35.79%). In addition, smokeless tobacco (29.10%; 95% CI: 9.33%–48.88%) consumption was reportedly higher than that of smoked tobacco (22.96%; 95% CI: 1.74%–44.18%). Gender subgroup analysis showed a higher prevalence in males (28.59%; 95% CI: 24.16%–33.02%) as compared to females (25.77%; 95% CI: 17.68%–33.86%).

Conclusion:

A higher prevalence of tobacco use among the northeastern region of India, particularly males, the employed class, and illiterate people, suggests a dire need of more effective awareness programs to reduce tobacco consumption.
On the growth of Fourier multipliers
Authors: Battseren Bat-Od
Published: January 2024

We define a sequence of functions, namely, tame cuts, in the Fourier algebra

A(G)

of a locally compact group

G

, which satisfies certain convergence and growth conditions. This new consideration allows us to give a group admitting a Fourier multiplier that is not completely bounded. Furthermore, we show that the induction map

MA(\Gamma)\rightarrow MA(G)

is not always continuous. We also show how Liao’s property

(T_{\mathrm{Schur}},G,K)

opposes tame cuts. Some examples are provided.
Magnetic Particles, Fluorescent Wet Method, Dry Powder
Authors:   AMS K Non Destructive Methods and Processes Committee
Published: January 2024

This specification covers fluorescent magnetic particles in the form of a dry powder.
Assessment of the state of children after COVID-19 and other acute respiratory infections using the ISARIC COVID-19 survey
Authors: Chernyavskaya Anastasia S. , Simonova Olga I. , Rumyantsev Mikhail A. , Baimukhambetova Dina , Ezhova Anastasia A. , Pavlova Mariia S. , Petrova Polina Y. , Assanova Ramina , Gripp Marat R.
Published: January 2024

Introduction. The state of children had suffered from COVID-19 causes various persistent symptoms affecting on patient well-being and quality of life which is a significant healthcare issue.
The aim of the work. To assess health and well-being of children following COVID-19 and other acute respiratory infections.
Materials and methods. This is a case-control study including children with history of PCR-confirmed COVID-19 (n = 261) and other acute respiratory infections (n = 198). Patients were assessed 6 months and 1 year after the infection using the International Severe Acute Respiratory and Emerging Infection Consortium (ISARIC) COVID-19 questionnaire for children. The prevalence of symptoms including fatigue, weakness, lack of energy, as well as the emotional well-being, social relationships, and social activity of children was evaluated.
Results. Children with history of COVID-19 in six months had significantly higher rates of weakness and decreased school attendance compared to children with other acute respiratory infections. 12 months after infection, children in the case group were significantly more likely to experience poor concentration, weakness, a decreased sense of belonging and school attendance. However, 12 months after infection, control group had significantly higher rates of fatigue.
Conclusion. Children with a history of mild COVID-19 and other acute respiratory infections may experience ongoing health problems for 1 year after the infection, requiring greater attention from healthcare professionals and family members.
Course of Helicobacter pylori-associated gastritis in adolescents with hypovitaminosis D
Authors: Anikina Ksenia A. , Polivanova Tamara V. , Vshivkov Vitaliy A.
Published: January 2024

Introduction. The multifactorial nature of the occurrence and phasing of inflammatory changes in the gastric mucosa determine the need to search for conditions that can affect the slowing of the progression of gastritis in children.
Aim: to determine the manifestations of Helicobacter pylori-associated antrum gastritis in adolescents with hypovitaminosis D.
Material and methods. Ninety three 12–17 years adolescents with a morphologically confirmed diagnosis of gastritis were exa­mined. The content of vitamin D in the blood was determined using the ELISA method. Adolescents were divided into groups depending on the level of vitamin D supply and the period of solar insolation at the time of the examination.
Results. H. pylori infection in adolescents with hypovitaminosis D had a pronounced tendency to increase — 75% (53.6% in child­ren with sufficient vitamin D levels; p = 0.067).
The frequency of H. pylori among adolescents examined during low solar insolation was higher than during high solar insolation (p = 0.015). During the period of low solar insolation, the highest rates of H. pylori infection in children were found among adolescents with vitamin D deficiency (88.2% compared to 62.1% among children with a normal vitamin D supply; p = 0.057). During the period of high insolation, H. pylori infection was approximately the same (p = 0.82).
Antral gastritis with high activity was predominantly detected in adolescents infected with H. pylori and its frequency did not depend on the level of vitamin D in the blood.
Conclusion. Hypovitaminosis D is associated with H. pylori-associated gastritis, characterized by greater activity of the inflammatory process and has a clear relationship with the intensity of solar insolation.
The effectiveness of the use of synbiotics in the complex therapy of acute intestinal infections in children
Authors: Sutovskaya Diana V. , Litvinov Daniil I.
Published: January 2024

Relevance. Acute intestinal infections in children retain a high value in the structure of child morbidity and mortality, which necessitates the search for means and methods for their active treatment and improvement of prognosis.
Aim: to determine the effectiveness of the use of synbiotics in the complex therapy of acute intestinal infections in children at the outpatient stage.
Materials and methods. Fifty 6–17 years children with mild or moderate acute intestinal infections were examined. The patients were divided into the main group (30 children) and the control group (20 children), the groups were comparable. Patients from the main group, along with pathogenetic therapy, received a combination of Lacticaseibacillus paracasei DG I-1572 DSM 34154
(L. casei DG) and fructooligosaccharides (FOS), and children from the control group received only pathogenetic and symptomatic treatment. Clinical symptoms were evaluated over following up included temperature, frequency and, nature of stool, presence and severity of dyspeptic manifestations, nausea, frequency of vomiting, presence and severity of abdominal pain syndrome. Statistical data processing was carried out using statistical analysis Statistica v. 13.0 (StatSoft Inc., USA).
Results. The combined use of L. casei DG and FOS in the pathogenetic therapy of acute intestinal infections reduces the time of relief of clinical manifestations. The severity of abdominal pain syndrome regresses significantly faster when using this synbiotic. Norma­lization of the frequency and nature of stool occurs significantly faster with the simultaneous appointment of pathogenetic therapy and the synbiotic. The combination of L. casei DG and FOS has demonstrated a high safety profile, side effects have not been reported.
Conclusion. It is advisable to prescribe the combination of L. casei DG and FOS from the first day of acute intestinal infections alongside with pathogenetic and symptomatic therapy to achieve a clinical effect more quickly.
Epidemiology of digestive diseases in children in modern conditions: regional data as a reflection of Russian trends
Authors: Vikhareva Elena G. , Kovalenko Tatiana V.
Published: January 2024

Introduction. Pathology of the digestive organs is one of the factors influencing the health indicators in children.
Purpose of the work: to characterize current trends in the epidemiology of digestive diseases in children in the Udmurt Republic (UR).
Materials and methods. The epidemiological features of digestive diseases in 0–14 and 15–17 years children were studied on the base on official statistics for the period from 2012 to 2022. The polynomial approximation method was used for forecasting.
Results. There is a decrease in the prevalence of pathology of the digestive organs in 0–14 years children from 153.0 in 2012 to 75.0 in 2022 per 1000 children of the corresponding age, the average annual rate of decline was –6.3%. The predicted indicator will be 32.3 per 1000 children of the corresponding age in 2025. Similar trend in the prevalence of gastroenterological pathology were noted in the age group of 15–17 years: since 2012, this indicator has decreased by 1.9 times from 187.4 to 93.8 per 1000 children of the corresponding age with an average annual rate of decline of –6.3%. The predicted prevalence of gastroenterological pathology in 15–17 years children in the region will be 69.8 per 1000 children of the corresponding age in 2025. Since 2012, the trend in morbidity is characterized by a decrease in rates in both age groups with a higher rate of decline in the UR: from –10.6% in 0–14 years (Russia: –5.5%) to –7.7% in 15–17 years old (Russia: –3.0%). The predicted incidence rate in the UR will be 19.2 in 2025 for children 0–14 years old; 18.6 for children 15–17 years old.
Conclusion. The established patterns indicate a decrease in the prevalence and morbidity of digestive organs among the child population of the UR.
Primary immunodeficiency in the 9-year child
Authors: Aliskandieva Zuleykha A. , Aliskandiev Alaudin M. , Idrisova Rakhmat M. , Izrailov Magomed I. , Amirova Kistaman М.
Published: January 2024

Primary immunodeficiency conditions are a heterogeneous group of disorders caused by defects in various parts of the immune system, manifested in the form of recurrent infectious and autoimmune diseases of varying severity. The authors describe own clinical observation to determine the principles of diagnosis and treatment of primary immunodeficiency in children in modern conditions. The average age of diagnosis of an immunodeficiency condition has been established to be best over 30 days, but often this time increases to several years. The data of the enrolment of primary immunodeficiency states of the Republic of Dagestan on the diagnosis and permanent replacement therapy of immunodeficiency states is also presented.
ANALYSIS OF THE STRUCTURE OF MICRO INJURY OF WORKERS IN THE CONSTRUCTION INDUSTRY
Authors:   Belgorod National Technological University named after S.D. Shukhov, SEMEYKIN A.YU , TOMAROVSHCHENKO O.N. ,   Belgorod National Technological University named after S.D. Shukhov, PETROVA V.A. ,   Belgorod National Technological University named after S.D. Shukhov, SARYCHEV V.I. ,   Tula State University
Published: January 2024

The article considers the problem of forecasting and operational assessment of the distribution of the probability of occurrence of micro-injuries of workers. Experimental data were obtained as a result of approbation of the “System for improving labor safety for recording, analyzing and predicting micro-injuries ” based on software in construction organizations in the Belgorod region. Single-factor analysis of variance was used in the processing of experimental data to identify the most significant indicators that affect the likelihood of a microinjury to an employee. Models of the distribution of micro-injuries by gender, age, length of service and type of micro-injuries of workers are presented. The boundaries of "vulnerable" categories of workers are determined, for which it is necessary to develop effective measures to optimize the functioning of the occupational health and safety management system and injury prevention. A model for accounting and assessing micro injury has been developed based on the analysis of variance of the database registered through the software package of the digital platform implemented in construction organizations.
USE OF PEAT AS A HEAVY METAL SORBENT
Authors:   Ural State Mining University, VALIEV N.G.O. , LABZIN M.S. ,   Ural State Mining University, USMANOV A.I. ,   Institute of Mining, Ural Branch of the Russian Academy of Sciences, ZAVYALOV S.S. ,   Ural State Mining University
Published: January 2024

Territories of accumulated environmental damage have a negative impact on all components of the environment, lead to deterioration of the sanitary and epidemiological state in the regions. One of the main pollutants of the ecosystem are heavy metals, the sources of which are industrial enterprises. Currently, technologies aimed at limiting the mobility of heavy metals in soils and technogenic soils are being developed and implemented. The sorbent-oriented method is the most promising. It involves the use of natural materials to solve environmental problems. The use of local types of minerals for land reclamation is a priority in the Russian Federation. Peat is a universal natural material that is used in many sectors of the national economy. It can be used as a sorbent-meliorant for the adsorption of heavy metal ions during reclamation work on disturbed lands and as an organic fertilizer to improve physico-chemical properties and increase soil fertility. The article presents the results of studies of sorption of a number of heavy metals (Cu2+, Cd2+, Pb2+, Cr3+, Cr6+) by modified peat. Studies have shown that peat-based sorbent meliorant can be used in the process of developing environmental measures in terms of ecological rehabilitation of disturbed native ecosystems.
RADIAL COMPENSATOR TO REDUCE THE LEVEL OF EMERGENCY IN OIL PRODUCTS WELLS
Authors:   Almetyevsk State Oil Institute, VAKHITOVA R.I. , SARACHEVA D.A. ,   Almetyevsk State Oil Institute, URAZAKOV K.R. ,   Ufa State Petroleum Technical University
Published: January 2024

The main cause of accidents with submersible installations of electric centrifugal pumps is an increased level of vibration of the installation. An important way to protect against increased vibration level is vibration isolation. The authors propose a radial compensator to reduce the formation of limit values of stress concentrations in the tubing string, to prevent them from breaking to the bottom of the well, twisting the electrical cable of the submersible pumping unit. In order to evaluate the efficiency of using a radial compensator, tests were performed on a vertical automated VIG-98 test bench. The vibration level was measured using the mean square vibration velocity in mm/s using the Diamex vibration analyzer. Conducted a test of the selected pump in the well without the use of a radial compensator. The magnitude of the vibration was 1.79 mm/s. Conducted a test of the selected pump in the well using a radial compensator. The magnitude of the vibration was 1.49 mm/s. Comparison of the results of the vibration values of the submersible pumping unit showed that the use of a radial compensator as part of the installation of an electrical centrifugal pump made it possible to reduce the magnitude of vibration rates by 18 %.
METHODOLOGY FOR EVALUATING THE SUSTAINABILITY OF EXISTING VERTICAL SHAFTS
Authors:   JSC ", MASHIN A.N. ,   Transinzhstroy "
Published: January 2024

Dozens of vertical shafts of mining enterprises are in operation in the Russian Federation, with a service life of 40-50 years or more. Most of them require repair and restoration work of varying degrees of complexity. This publication presents a methodology that allows assessing the stability of near-hole rocks in five categories, taking into account indicators of relative strength, core quality, support-mass contact, water cut and hole life. The category is determined on the basis of the calculated value of the integral stability criterion, which takes into account the influence of the main factors. The article considers the algorithm for determining each of the factors, while for the first time it is proposed to take into account such an indicator as the quality of the contact "support - rock mass", which can be assessed as a result of a wellbore survey using geophysical methods. It was noted that in shafts in an inoperable technical condition, the main length of which belongs to IV and V categories of stability, it is required to carry out work on their reconstruction with a change in design parameters...
WASTE-FREE TAILINGS DISPOSAL TECHNOLOGY ENRICHMENT OF DONBASS
Authors:   Moscow Polytechnic University, GOLIK V.I. , BURDZIEVA O.G. ,   Vladikavkaz Scientific Centre of the Russian Academy of Sciences
Published: January 2024

The prospects of waste-free utilization of coal enrichment tailings are considered. The concept of radical utilization of coal production waste with their inclusion in the natural cycle is detailed. The prospects of a new technology of metal leaching in high-speed mills with mechanochemical activation of processes are evaluated. The recommended technology provides an increase in the profitability of coal mining and radically solves environmental issues.
ON THE STABILITY OF THE MAIN BENCHMARKS OF OBSERVATION STATIONS DURING THE UNDER-MINING OF THE EARTH’S SURFACE
Authors:   Institute for Problems of Integrated Development of Subsoil named after Academician N.V. Melnikov of the Russian Academy of Sciences, KULIBABA S.B. , ROZHKO M.D. ,   Republican Academic Research and Design Institute of Mining Geology, Geomechanics, Geophysics and Mine Surveying Ministry of Science and Higher Education of the Russian Federation
Published: January 2024

Based on the results of field observations, the negative impact of the lack of stability of the main benchmarks of observation stations on the accuracy of the instrumental determination of the earth's surface subsidence in the process of movement is shown. It has been established that under the influence of various uncontrolled factors, the vertical displacements of the main benchmarks can reach 25... 60 % of the maximum subsidence in the displacement trough.
ENVIRONMENTAL RISKS OF LIFE ACTIVITIES OF PEOPLE IN INDUSTRIAL CITIES
Authors:   Perm National Research Polytechnic University, PAZDNIKOVA N.P. , KONSTANTINOVA M.V. ,   Irkutsk National Research Technical University, GOLIK V.I. ,   Moscow Polytechnic University,   Vladikavkaz Scientific Centre of the Russian Academy of Sciences, SARYCHEV V.I. ,   Tula State University
Published: January 2024

The article proves the importance of assessing the impact of environmental risks on the level of life of people living and working in industrial cities. A methodology is proposed that includes a methodology for identifying and assessing the level of environmental risks through the system of environmental insurance of industrial enterprises based on forecasting and reservation methods. The methodology was tested on the example of industrial cities of the Perm Territory, as a result of which, within the framework of the study, the dependence of the amount of damage caused by enterprises to the environment on the amount of budget expenditures directed to environmental protection was revealed. A comparative assessment of the environmental risks of life was carried out before the introduction of the environmental insurance system and after that, which proved a decrease in the level of environmental risks of the territory.
THE EFFECT OF REINFORCING MATERIALS OF MINING TOOLS ON THEIR EXPLOSION SAFETY DURING USE
Authors:   State University of Management, LINNIK YU.N. , ZHABIN A.B. ,   Tula State University, LINNIK V.YU. ,   State University of Management, RAJABOV Z.R. ,   Moscow Polytechnic University
Published: January 2024

In many cases, the cause of explosions of dangerous concentrations of dust-methane-air mixtures in coal mines is the frictional contact of the ends with the destroyed mountain massif. In this regard, many scientists are conducting studies on the explosiveness of the use of cutters in mines, but they are mainly aimed not at establishing the causes of methane ignition, but at improving the systems for the pressure of methane flares. The probability of methane ignition, along with other factors, depends on the reinforcement material of the mining tool, which is one of the controversial issues of Russian and foreign researchers. In this regard, studies were carried out aimed at establishing the influence of various materials reinforcing cutters on the likelihood of methane ignition during rock cutting, for which a special stand was made. The results of the experiments showed that the explosions of the methane-air mixture are determined not by the intensity of sparking of the cutter material when it wears out, but by the accumulation of thermal energy, when the critical level of which is reached, the mixture explodes. Moreover, critical energy is achieved faster when cutting rock with harder reinforcing materials.
DEVELOPMENT AND CONDITION OF THE APPLIED TYPES OF MINING TECHNOLOGY AND DEVELOPMENT SYSTEMS IN THE KUZBASS SECTIONS
Authors:   LLC ", NENASHEV A.S. ,   Publishing House of subsoil use and mining sciences", FEDOTENKO V.S. , FEDOTENKO N.A. ,   Academician N.V. Melnikov Institute of Problems of Integrated Development of Mineral Resources of the Russian Academy of Sciences
Published: January 2024

A retrospective analysis of the development, state and types of open-pit mining technology and systems for the development of coal mines in Kuzbass has been carried out. It is shown that during the mining of deposits, the open spaces left on the sections after the completion of mining operations from the workings and the mountains of external dumps are prone to erosive manifestations and change for the worse the relief of the earth's surface and the state of the air environment of the territory that has developed in natural conditions. At the same time, the absence of a systematic approach to the restoration of the lands disturbed by open mining operations at the coal mines of the basins, as well as a system for the complete development of all layers of the coal formation on the cut working horizons determines the need to reduce the areas of the disturbed surfaces of the cut field by open mining and reduce the withdrawal of land areas for external rock dumps.
EARTH SCIENCES - WOULDN'T FORGET MAN
Authors:   North Caucasus Mining and Metallurgical Institute (State Technological University), ALEKSEEV I.A. , CHEDZHEMOV S.R. ,   North Caucasus Mining and Metallurgical Institute (State Technological University)
Published: January 2024

Planet Earth is the cradle of human civilization. Today, it is on the brink of disaster. The relevance of the article is due to the attempt to present their own vision of solving those problems that have posed the challenges of our time to humanity: man-made disasters, environmental pollution, devaluation of universal values of the family and upbringing, the threat of military clashes, both nuclear and biological. Over the years, they do not disappear, but become more and more likely, and in these conditions the importance of research united by the general theme of Earth and environmental sciences increases significantly. Research methods are based on the laws of dialectics, general scientific and special methods of knowledge of truth, deductive and inductive, concrete to abstract. The authors believe that in the matter of a comprehensive study of the Earth, an integral approach based on the social and humanitarian sciences that study human behavior in all areas of his activity and natural sciences is necessary. Earth and environmental sciences are productively supplemented by directions in the field of legal and psychological and pedagogical sciences.
ANTHROPOGENIC IMPACT OF MINERAL FORMATIONS ON ENVIRONMENTAL COMPONENTS
Authors:   Tula State University, KACHURIN N.M. , PROKHOROV D.O. ,   Tula State University, LUSKIN G.G. ,   LLC "Roscontract", AMBARTSUMOV D.A. ,   "NPP "Ruskhimsintez" LLC
Published: January 2024

The analysis of known classifications and typifications of anthropogenic impacts on the geological, natural or environment has been made. The types of environmental pollution as a result of anthropogenic impact are considered. It has been established that when considering the impact of anthropogenic mineral formations on the main components of the geological environment, soils and artificial soils, rocks, terrain relief, groundwater and geodynamic processes are to be distinguished. For the environment, additional consideration needs to be given to vegetation and surface water. When liquidating mining enterprises, in order to assess the anthropogenic impact of mineral formations on the components of the environment, it is advisable to consider the factors of interaction between anthropogenic mineral formations and the environment, such as deformations, vertical water filtration, water erosion, and wind erosion.
ON THE SAFE OPERATION OF THE UNDERWATER SHUTTLE TANKER OF HYDROCARBONS
Authors:   Gubkin Russian State University of Oil and Gas (National Research University), HALVORSEN A.L. , EREMIN N.A. ,   Gubkin Russian State University of Oil and Gas (National Research University),   Institute of Oil and Gas Problems of the Russian Academy of Sciences (IPNG RAS)
Published: January 2024

The article presents the results of the study "Providing a control system for the trajectory of an underwater shuttle tanker of hydrocarbons". The purpose of the work is to study the safe operation of an underwater shuttle tanker (Subsea Shuttle Tanker, SST) during ascents and dives in an accident-free operational zone (Safety Operating Envelope, SOE). The analysis of scientific and technical literature on the design of underwater shuttle tankers, their operating conditions inside the safe operational zone, including in emergency situations, is carried out. The paper analyzes scenarios of possible emergencies.
IMPROVEMENT OF THE TECHNOLOGY FOR THE DEVELOPMENT OF QUARTZ DEPOSITS ON THE BASIS OF COMBINED EXTRACTION
Authors:   Mining Institute of the Khabarovsk Federal Research Center of the Far Eastern Branch of the Russian Academy of Sciences Reference, CHEBAN A.YU.
Published: January 2024

It is possible to increase the efficiency of development of vein quartz deposits by increasing the yield of conditioned fractions of quartz raw materials. The article proposes a technology for combined mining, which consists in the advanced extraction of inclusions of the highest quality quartz by drilling large-diameter cores, as well as the use of an improved scheme for explosive loosening of the contact zone of overburden and quartz to reduce the negative impact of the explosion. The use of borehole charges of reduced diameter with cumulative cavities provides a shielding layer of uniform power, and, consequently, more effective protection of quartz from the damaging effects of an explosion. Extraction of the remaining reserves of quartz, predominantly of ordinary quality, is carried out using a hydraulic hammer.
COMPARATIVE ANALYSIS OF CATAGENESIS IN SCREEN CLAY ROCKS IN AINCIENT TRIAS-PALEOZOIC AND YOUNG LOWER PLIRCENE DEPOSITS OF SOUTH MANGISHLAK AND WESTERN BOART OF SOTHIN CASPIAN DEPRESSION
Authors:   Azerbaijan State Oil and Industry University, KHALIFA-ZADEH CH.M. , EFENDIYEVA Z.JA. ,   Azerbaijan State Oil and Industry University, VALIEV N.G. ,   Ural State Mining University, HAMASHAYEVA-MURADOVA S.YA. ,   Azerbaijan State Oil and Industry University
Published: January 2024

The event of catagenesisi in stratisfere is plays main role in alteration and formation of sedimentary rocks and sedimentary useful minerals. The first of all under subsidence sedimentary fasins and sedimentary rocks lost petrophysics puculdrity under oction of thermobar-ic factors. Rockformation minerals as quartz feldshpats an carbonate take plays is erosive and distructive and in same time in contrary direction is condacts transformation terrigenous and carbonate minerals to new minerals. Under catagenesis in the intensive catagenic processes determine role plays primery composition of sedimentary rocks and duration stay it’s in the zone of catagenesis. Authors of the article in order proves action to time of staying sedimentary rocks to catagenetic processes conducted in concrete factice materials specially investigation, which disclosed scole alterations of sedimentary rocks in stratisfere. For standing task has been used comparative analysis of catagenesis the example of permo-triassic rocks of Southn Manqishlak and fraqmental lastern precaucasus and Pliocene deposits of western boart of South Caspian...
ELECTROMAGNETIC VORTEXMETHOD OF ACTION ON WATER MEDIA FOR THEIR PURIFICATION
Authors:   «LOGOS» LLC, NEFEDOV V.I. , GRABOVA I.A. ,   «LOGOS» LLC, DUBALSKY V.E. , SIMANKIN A.F. ,   Tula State University
Published: January 2024

The process of multifactorial influence of various forces for purification of polluted water media is considered. These effects on polluted waters are carried out by electromagnetic fields of various configurations and vortex gravitational forces of the whirlpool. For experimental verification of the proposed purification method, a laboratory installation was made, including a device for creating magnetic fields of various types and a reactor that creates a whirlpool from the liquid being cleaned. The effectiveness of the proposed method was tested on the purification of three types: wastewater, chemical waste of paint and varnish production and the liquid phase after alcohol bard - food production waste. During wastewater treatment, good results were obtained for iron-containing salts, zinc and copper, phosphates, and hexavalent chromium. It is shown that the power consumption of the installation can be reduced due to the electrical supply from a generator driven by a turbine placed in a whirlpool flow.
METHODICAL APPROACH TO SUBSTANTIATION OF TECHNOLOGIES FOR REDUCING DAMAGE FROM ORE REGRINDING DURING UNDERGROUND MINING
Authors:   Institute of Mining of Ural Branch of RAS, SOKOLOV I.V. , ROZHKOV A.A. , ANTIPIN YU.G. ,   Institute of Mining of Ural Branch of RAS
Published: January 2024

In underground mining, in most cases, there is a decrease in the completeness of extraction of subsoil reserves and the efficiency of geotechnology associated with the regrinding of ore in the process of mining. Consequently, the development of a methodology for substantiating measures to reduce damage from ore regrinding, which allows taking into account the diversity and degree of influence of acting factors at the design stage of a mining system, is an urgent scientific and technical task. Based on the use of a systematic approach and the modular principle of designing mining systems, it is proposed to separate such measures into a single geotechnological module within the subsystem of a stope excavation. The expediency of such a separating is substantiated, since the measures meet the criterion of independence, and their presence or absence significantly affects the efficiency and safety of the mining system. To improve the objectivity of the substantiation of technologies at the stage of designing a mining system, a methodological approach is proposed, which consists in taking into account the category of lost ore fines and the state of its presence in the mining area, which are formed during the extraction of the main reserves of an extraction unit of mining technical conditions and the procedure for implementing geotechnology of reduce damage from ore regrinding relative to stoping cycle.
FORECAST OF THE GEOMECHANICAL SITUATION DURING THE SECOND CONSERVATION OF THE YUGO-ZAPADNAYA MINE
Authors:   Institute of Mining of the Ural Branch of the Russian Academy of Sciences (IGD UrO RAS), AVDEEV A.N. , SOSNOVSKAYA E.L. ,   Institute of Mining of the Ural Branch of the Russian Academy of Sciences (IGD UrO RAS), KHARISOV T.F. ,   Institute of Mining of the Ural Branch of the Russian Academy of Sciences (IGD UrO RAS)
Published: January 2024

The paper presents the results of the study of the probable scenario of geomechanical processes during double flooding of a mine developing steeply declining gold veins of low thickness. Analytical calculations, field measurements and finite-element modelling have been carried out. Unfavourable geomechanical factors, which may increase the probability of dangerous ground surface shifts and collapses, are determined. Linear and angular parameters of the zone of harmful effect of mining works, the level of displacement in the neighbourhood of mine workings were calculated. Natural and anthropogenic stresses at the mine before and after mothballing were assessed. The level of rock displacements in the zone of influence of mining works was established.
ANALYSIS OF THE RESULTS OF GEOMECHANICAL MODELING OF THE DISPLACEMENT OF THE SURFACE OF A COAL QUARRY
Authors:   Irkutsk National Research Technical University, DRUZ' R.A. , KORYTOV A.S. , PROTASOVA A.V. , ZHGILEV A.P. ,   Irkutsk National Research Technical University
Published: January 2024

A brief geological description of the object of study is given. The condition of the ledge of the coal quarry has been studied and a geomechanical model of the emergency site has been constructed based on the physical and mechanical properties of rocks, which are taken from the reference material. The finite element method, which is the basis of geomechanical modeling, is considered. The analysis of the state of the array based on the model of the geomechanical state of the board is carried out. It is concluded that the simulation results correspond to the data obtained by measurements.
ASSESSMENT OF THE IMPACT OF TUNNEL CONSTRUCTION TECHNOLOGY ON THE ROCKS OF THE CONTOUR ARRAY USING THE FINITE ELEMENT METHOD
Authors:   National Research Technological University ", TSYUPA D.A. ,   MISIS"
Published: January 2024

The relevance of conducting research in the field of ensuring the safety and operational reliability of existing subway tunnels falling into the zone of influence of new construction based on mathematical modeling methods is substantiated - the relevance and priority of this direction is emphasized by rapidly developing environmental and industrial safety requirements for the sustainable and efficient development of new underground construction sites, taking into account the existing and functioning infrastructure. The main components of the scientific and methodological substantiation of technological solutions in the field of safety and operational reliability of existing subway tunnels that fall within the zone of influence of new construction have been developed methodology (algorithm, iterations, production rules, system of restrictions and boundary conditions, software package), characterized by the updated presence of the apparatus of numerical modeling of related geomechanical tasks in underground construction of tunnel structures and the possibility of their management and regulation.