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Study on the Mechanism of coal and Gas Outburst Induced by main adit cross-cut coal uncovering Controlled Small Folds Structure

Study on the Mechanism of Coal and Gas Outburst Induced by M...

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作者： Shutong ZHANG Aihua LIU School of Traffic and Civil Engineering Shandong Jiaotong University

It is shown from the practice that coal and gas outbursts are mostly related to small geological ***,small fold structures are conducive to induce coal and gas outbursts because of the condition of forming compression shear zones and gas *** on the background of 2 coal and gas outbursts which were caused by small fold structures in the process of main adit cross-cut coal uncovering of a mine,the evolution of stress field and the law of gas occurrence and migration in the process of large cross-section cross-cut coal uncovering controlled by small fold are studied using of theoretical analysis method in this *** purposes of the study are to reveal the mechanical process of coal and gas outburst and explain the mechanism of *** shown the spatial scales of small fold structures are relatively small,and their occurrence characteristics are different from those of large fold *** there are various forms of the spatial distribution of small fold structures when uncovering coal seams,which leads to the complexity of stress ***,the small fold structure has a great impact on mining *** conclusions of this paper provide a theoretical basis to forecast and prevent coal and gas outbursts occurred in the similar geological and engineering conditions.

关键词： Small folds main adit cross-cut coal uncovering Stress field Gas reservoir coal and gas outburst mechanism

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