Study on the essential management system of the coal mines

AbstractSerious accidents occur continuously in China's coal mines in recent years, which have brought about huge economic losses and negative society impact. The signs have emerged before the happening of the coal accidents. The accidents occur mainly because of the management negligence. The essential safety management system is built for coal safety management in China in allusion to the safety management problem of coal mines. The system is composed of six sections, risk management, establishing the management standard and management measure, managing and controlling the human unsafe behaviors, safeguard management, evaluation system and information system

Synergistic and complementary safety supervision mode in coal mines: a case of coal mining companies in China

Učinkovit sigurnosni nadzor jamči sigurnu proizvodnju rudnika ugljena. Međutim, tradicionalni način nadzora u kineskim rudnicima ugljena ne može u potpunosti ostvariti sinergijske i dopunske učinke elemenata (tj. sigurnosne inspektore) sustava sigurnosnog nadzora, što uzrokuje informaciju, primjenu i resurs kao izolirani otočić. Kako bi se prevladali ovi nedostaci i poboljšala učinkovitost sigurnosnog nadzora, u ovom je istraživanju istražena sinergijska i dodatna metoda sigurnosnog nadzora (SCSSM - Synergistic and Complementary Safety Supervision Mode). Nakon analize primjenjivosti sinergijske i dopunske ideje upravljanja, ova studija kreativno je predstavila predloženu ideju sigurnosnog nadzora u rudniku ugljena. Na osnovu nedostataka postojećeg načina sigurnosnog nadzora i prednosti sinergijskog i dopunskog upravljanja, uspostavljen je SCSSM i osigurana njegova nedvojbena metoda rada. Konačno, novi način sigurnosnog nadzora primijenjen je u Xinwen Mining Groupu Xin Julong Co., Ltd. s određenom metodom primjene i usporednom analizom. Rezultati pokazuju da novi način sigurnosnog nadzora koristi manje resursa sigurnosnog nadzora nego tradicionalni. U međuvremenu, poboljšani su učinkovitost provjere i ispravljanja skrivenih opasnosti te ograničeni kapacitet projekta. Štoviše, broj nesreća je smanjen, što ima značajnu sigurnosnu, ekonomsku i društvenu korist. Ova studija može ostvariti sinergijske i dopunske učinke elemenata sigurnosnog nadzora radi poboljšanja razine nadzora nad sigurnošću rudnika ugljena te ima veliku vrijednost popularizacije i primjene.Effective safety supervision guarantees coal mine safety production. However, the traditional supervision mode in Chinese coal mines cannot fully realize the synergistic and complementary effects of elements (i.e., safety inspectors) of safety supervision system, which causes information-isolated island, application-isolated island, and resource-isolated island. To overcome these deficiencies and improve the efficiency of safety supervision, a synergistic and complementary safety supervision mode (SCSSM) was explored in this study. After the applicability analysis of the synergistic and complementary management idea, this study creatively introduced the proposed idea to the safety supervision in the coal mine. On the basis of the deficiencies of the existing safety supervision mode and the advantages of synergistic and complementary management, the SCSSM was then established and its definite operation method was also provided. Finally, the new safety supervision mode was applied in Xinwen Mining Group Xin Julong Co., Ltd. with definite implementation method and comparative analysis. Results show that the new safety supervision mode uses lesser safety supervision resources than the traditional one. Meanwhile, the checking and rectification efficiency of hidden dangers and the project qualified rate are improved. Moreover, the number of accidents is reduced, which has significant safety, economic, and social benefits. This study can realize the synergistic and complementary effects of elements of safety supervision to improve the level of coal mine safety supervision and has high value of popularization and application

Application of Soft Computing Techniques for Prediction of Slope Failure in Opencast Mines

One of the most arduous jobs in the industry is mining which involves risk at each working stage. Stability is the main focus and of utmost importance. FOS when calculated by traditional deterministic approach cannot represent the exact state at which the slope exists, though it gives a rough idea of the conditions and overall safety factor. Various approaches like numerical modelling, soft computing techniques allow us with the ease to find out the stability conditions of an unstable slope and the probability of its failure in near-by time. In this project, the stability conditions of some of the benches of Bhubaneswari Opencast Project, located in Talcher, have been evaluated using the soft-computing techniques like Artificial Neural Network implemented using MATLAB and then the results are being compared with the Numerical Model results from the software FLAC which deploys Finite Difference Method. A particular slope (CMTL-179, Seam-3) has been studied and the respective factor of safety for each slope has been predicted using both the Artificial Neural Network and FLAC. Initially the data related to bench height, slope angle, lithology, cohesion, internal angle of friction, etc. are determined for the respective rock of the slope of which the FOS is to be calculated. . A total of 14 training functions were used to train the model. The best training was found in Scaled Conjugate Gradient Backpropagation which corresponds to a regression coefficient of 91.36% during training and 88.24% overall. The best Validation Performance was also found at 60 epochs with Mean Squared Error of 0.069776. According to the trained neural network, it was found that the slope was 44.5% stable with a FOS 1.0226. Using the software FLAC, it was found that the slope was stable with FOS=1.17. The generic model will thus allow us to get a range of probability for the slope to fail so that necessary arrangements can be made to prevent the slope failure

Creativity Skills Applied to Earth Science Education: Examples from K-12 Teachers in a Graduate Creativity Class

NOTE: This is a large file, 10.7 mb in size! This article briefly explores different aspects of creativity, and then examines K-12 teachers' reactions to exercises applied to earth science concepts in a graduate creativity class. Different types of puzzle activities centering on geoscience content include a quiz game based on Odyssey of the Mind spontaneous problems, and other exercises related to embedded words, transformed cliches, remotely associated word sets, and wordsmithing. Teachers used visualization for an imaginary interview with a geoscientist, along with personal analogy of an earth science feature. As a culminating activity, teachers fashioned a geoscience curriculum material with a given set of items. Ideas for applying the activities to geoscience classes at various grade levels are included. Educational levels: Graduate or professional, Graduate or professional

Industrial metabolism : a case study of the economics of cadmium control.

Cadmium; Luftverunreinigung; Gewässerbelastung; Bioökonomik; Umweltchemikalie; Stoffstrom-Management; Deutschland;

An investigation commissioned by the National Union of Mineworkers

The University of the Witwatersrand has a long established relationship with the mining industry. Indeed, its origins go back to the South African School of Mines established in Kimberley in 1896. (1). Since 1917, the Chamber of Mines has given direct grants to the University and its predecessors. In fact, the Chamber remains our largest private donor. Murray has shown in his authoritative study of the early years of the University that there have been occasions in our history when the Chamber has felt that it has not received a satisfactory return upon its massive investment in the University (2). On balance, however, the University can rightly claim to have served the Chamber well over the years. In recent years, the other side of the industry's history and social structure has been a focus of systematic investigation in this University. Here, van Onselen's Chibaro stands out : a pioneering attempt to create historically the social world of the compound in the early years of the mining industry in Southern Rhodesia. In our own Department, Moodie, Bozzoli, and Innes have all contributed to our knowledge of the social structure of mining

Qualitative and Quantitative Approaches for Evaluation of Safety Risks in Coal Mines

The safety in underground coal mines continues to be a major problem in the Indian mining industry. Despite significant measures taken by the Directorate General of Mines Safety (DGMS) to reduce the number of mining accidents in underground coal mines, the number remains high. To improve the safety conditions, it has become a prerequisite to performing risk assessment for various operations in Indian mines. It is noted that many research studies conducted in the past are limited to either statistical analysis of accidents or study of single equipment or operation using qualitative and quantitative techniques. Limited work has been done to identify, analyse, and evaluate the safety risks of a complete underground coal mine in India. The present study attempts to determine the appropriate qualitative and quantitative risk assessment approaches for the evaluation of safety risks in Indian underground coal mines. This thesis addresses several important objectives as (i) to identify the type of safety risk analysis techniques suitable for evaluating various mining scenarios (ii) to identify and analyse the hazard factors and hazardous events that affects the safety in underground coal using the qualitative and quantitative approaches (iii) to evaluate the risk level (RL) of the hazardous factors/groups, hazardous events, and the overall mine using the proposed methodology. In this research work, the qualitative techniques, i.e. Failure Mode and Effects Analysis (FMEA), Workplace Risk Assessment and Control (WRAC), and the quantitative techniques, i.e. Fault Tree Analysis (FTA) and Event Tree Analysis (ETA) were applied in an underground coal mine to identify and analyse the hazard factors and hazard events. The analysis of FMEA and WRAC results concluded that the qualitative risk assessment is easy to execute and practical as they are not dependent on the historical data; rather they need experience and close examination. On the other hand, they may yield subjective results due to instinctive human assessment. The analysis of the FTA and ETA results concluded that the quantitative risk assessment could not be performed in Indian underground coal mines due to lack of probability, exposure, and consequence data. To overcome the mentioned problems in qualitative and quantitative techniques, a methodology was proposed for evaluation of the safety risks of hazard events, hazard groups, and overall mine. The proposed methodology is the unification of fuzzy logic, VIKOR (In Serbia: VIseKriterijumska Optimizacija I Kompromisno Resenje, that means: Multi-criteria Optimization and Compromise Solution), and Analytic Hierarchy Process (AHP) techniques. Because of the imprecise nature of the information available in the mining industry, fuzzy logic was employed to evaluate the risk of each hazardous event in terms of consequence, exposure, and probability. VIKOR as was used to rank the evaluated risk of hazardous events. AHP technique helps to determine the relative importance of the risk factors. Therefore, AHP technique was integrated into the risk model so that the risk evaluation can progress from hazardous event level to hazard factor level and finally to overall mine level. To reduce the calculation time significantly and to increase the speed of the proposed risk assessment process, a user-friendly Graphical User Interface (TRAM) was developed using the C# language through Microsoft Visual Studio 2015 and .Net libraries. The proposed methodology developed in this thesis was applied to six underground coal mines. The results presented the risk level of hazard events, hazards groups and overall mine of six mines. The mine-5 has the highest risk level among the evaluated mines. The ranking order of the mines observed based on the overall risk level is mine-5> mine-1 > mine-2 > mine-3 > mine-6 > mine-4. The results of the proposed methodology were compared with DGMS proposed rapid ranking method. This is observed that the proposed methodology presents better evaluation than other approaches. This study could help the mine management to prepare safety measures based on the risk rankings obtained. It may also aid to evaluate accurate risk levels with identified hazards while preparing risk management plans