Research on laws of the formation of gas channels of the deep mining space

Abstract

Abstract-Taking 2-1 coal seam of Zhao GU second mine of Henan Coal Mine Group as the background, the article analyzed the relationship between stress of deep mining coal and rock mass and permeability, and studied the relationship between oriented flow channels namely the Gas Channels of deep mining coal and rock mass and permeability and revealed laws of the formation of the Gas Channels of the deep space mining. The research results are as follows: (1) under the impact of mining, the stress of space mining redistributes and the inner of the coal and rock mass emerges the phenomenon that cracks expanse and rupture. The channel forming at this time, in which gas flows and diffuses, is called the Gas Channel. (2) Fit out curves about stress of mining coal and rock mass and permeability in different coal and rock mass states. (3) Get the relationship between maximal and minimum permeability and distance that working face has advanced and obtain the position of permeability mutation point above the gob. (4) Gain that the permeability is related to the degree of coal and rock mass's cracks development. However, it is essentially related to stress acting on mining coal and rock mass.