Abstract:
Coal mining working face will form stress concentration zone within a certain range of working face, and the mining activities in stress concentration zone leads to the concentrated stress superposition, which is easy to induce the accidents of coal and gas outburst. This paper takes a mine coal lane tunneling working face passing through the overlying coal seam working face stop line stress concentration zone as an example, the regional and local outburst-prevention measures effects are analyzed, the results show that in the face of stop line, the effect of stress concentration range is up to around 40 m, especially in front of the working face, gas emission drilling has obvious effect on relieving the stress concentration.