Architecture, stress state and permeability of a fault zone in Jiulishan coal mine, China: Implication for coal and gas outbursts

Li, Wenyuan; Ren, Tianwei; Busch, Andreas; Hartog, Sabine A. M. den; Wang, Chenghao; Qiao, Wei; Li, Bin

doi:10.1016/j.coal.2018.09.002

Cited by 69 publications

(36 citation statements)

References 74 publications

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“…CBM reserve, which is buried above the depth of 2000 m, is 36.81 trillion m 3 , and it is almost equal to the amount of conventional natural gas resources . As an associated product of coal, CBM is not only the major hazards in coal mine, and it is also a kind of greenhouse gases; of which, the global warming potential is 25 times more than that of carbon dioxide. Additionally, CBM is a valuable clean energy, so the United States, Russia, Canada, Australia, and many other countries begin to develop CBM resources.…”

Section: Introductionmentioning

confidence: 99%

Damage‐induced permeability model of coal and its application to gas predrainage in combination of soft coal and hard coal

Zhang

et al. 2019

Energy Science & Engineering

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Coal permeability is a key parameter that affects the drainage of coal bed methane (CBM). Owing to the lower original permeability of coal seams in China, more attention was paid to the study of damage‐induced permeability laws. However, the theory of damage‐induced permeability still needs to be improved. In this paper, the permeability evolution experiments during the complete stress–strain process of coal were carried out firstly. The results are shown that with the increase in axial strain, the coal permeability decreases slowly at first, then increases rapidly, and finally increases slowly or even remains unchanged, and the peak stress point can be regarded as the extreme point of permeability. Then, the equivalent plastic strain was used to describe the damage of coal. Based on the above results, a new damage‐induced permeability model was developed, and the new model can match the experimental data of permeability very well. In addition, solid–gas coupling models of coal were developed based on the new permeability model, and the numerical results show that there is a region of sudden increase in permeability around the borehole where plastic failure occurs, which indicates that the damage‐induced permeability model is reasonable. Finally, the results of numerical simulation of gas predrainage in combination of soft coal and hard coal under different cases were used to optimize the borehole layout of gas predrainage in the field.

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Section: Introductionmentioning

confidence: 99%

Damage‐induced permeability model of coal and its application to gas predrainage in combination of soft coal and hard coal

Zhang

et al. 2019

Energy Science & Engineering

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“…Research indicates that over 90% of significant outbursts have been concentrated in strongly deformed zones along the axes of geologic structures . The prediction of the outburst area based on gas geology division theory suggests that the geological structure is the dominant geological factor controlling the outburst.…”

Section: Indicator System and Model For Coal And Gas Outburst Predictionmentioning

confidence: 99%

“…Coal and gas outbursts are complex dynamic disasters, which, based on a comprehensive supposition, result from interactions among the structural mechanical properties of coal, ground stress, and gas pressure . In addition, coal and gas outbursts are closely related to geological structure, adsorption characteristics, and other factors . Through protracted and unremitting efforts, researchers from several countries have advanced various outburst prediction methods based on the understanding of outburst mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Applications of online integrated system for coal and gas outburst prediction: A case study of Xinjing Mine in Shanxi, China

Zhao

Sun

Cao

et al. 2020

Energy Science & Engineering

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In this study, an indicator model and system for coal and gas outburst prediction are identified and established based on gas geological anomalies, mining stress, and gas emission characteristics. In this regard, the coal and gas outburst prevention techniques and mine rules in China are taken into account. In addition, using this model, an online integrated system and database for coal and gas outburst prediction were built for Xinjing Mine in Shanxi Province. The application results of the prediction system indicate that the system software and hardware can guarantee early warning of coal and gas outburst. The system is continuous and stable, and the early warning results are issued in a timely and accurate manner. The accuracy of the early warning results is high and consistent with the actual risk of the mine. K E Y W O R D Scase study, coal and gas outburst, coal mine, multisource information, prediction | 1981 ZHAO et Al.

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“…e geological conditions of mines with dynamic disasters are generally complex. Gao et al [39], Song and Zhang [40], Jia et al [41], Li et al [42], and Qiu et al [43] have studied the influence of faults, folds, and other geological structures on coal and gas outburst. e former research results show that in the abnormal geological structure, under the disturbance of mining, it can produce greater unbalanced force.…”

Section: Deep Stress-gas Disaster Evolution Processmentioning

confidence: 99%

Research on the Disaster‐Inducing Mechanism of Coal‐Gas Outburst

Nie

Wang

Qiu

2020

Advances in Civil Engineering

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In China, coal-gas outburst is seriously affecting safety of the coal mine. To improve the safety status of underground coal mining, this work investigated the evolution process and occurrence mechanism of coal-gas outburst under the coupling action of stress and gas. Results show that increasing either gas pressure or in-situ stress can make coal destroy and destabilize, and the contribution of gas pressure to coal failure is twice that of in-situ stress. In ultradeep coal mining, coal-gas outburst may occur even under the condition of low gas pressure due to large in-situ stress. Moreover, the larger the mining depth is, the lower the gas index is required for disaster occurrence. The results have certain guiding significance for coal energy mining and the control of coal-gas outburst in deep coal mining.

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Architecture, stress state and permeability of a fault zone in Jiulishan coal mine, China: Implication for coal and gas outbursts

Cited by 69 publications

References 74 publications

Damage‐induced permeability model of coal and its application to gas predrainage in combination of soft coal and hard coal

Damage‐induced permeability model of coal and its application to gas predrainage in combination of soft coal and hard coal

Applications of online integrated system for coal and gas outburst prediction: A case study of Xinjing Mine in Shanxi, China

Research on the Disaster‐Inducing Mechanism of Coal‐Gas Outburst

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