The Study of Control Action of Fault on Coal and Gas Outburst

摘要

The results show that coal and gas outburst has the characteristics of control structure, segmented variability and uneven regional distribution, affected and controlled by the geological structure and stress in time and space. The examples of coal and gas outburst show that most of coal and gas outbursts occur near fault, indicating fault has obvious controls on coal and gas outburst. The existence of fault gouge and accompanying crack in the coal petrography near fault is conducive to the existing and migration of gas. The compression and stretching produced during the formation of fault promotes the formation of structural coal, which are prepared power base for coal and gas outburst. Fault with material and power base promotes the frequent occurrence of coal and gas outburst. This regularity understanding has important theoretical and practical significance to reveal the occurrence mechanism and regional forecast of coal and gas outburst.