煤层厚度对孤岛工作面冲击危险影响研究

Coal thickness impact to island coal face dangerous impact study

研究了不同煤厚条件下覆岩空间支承压力与弹性应变能密度的演化规律。发现随着煤厚的增加,煤壁前方的支承压力与弹性应变能密度峰值逐渐增大,出现的位置也逐渐远离煤壁,且应力峰值集中系数逐渐增大,说明煤岩层赋存越深,厚度越大,开采过程中发生冲击地压的可能性就越大。

to study the strata under the conditions of different coal thick space evolution law of abutment pressure and the elastic strain energy density.Found that with the increase of coal thickness, coal wall in front of the peak abutment pressure and the elastic strain energy density increased gradually, the position also gradually away from the coal wall, and the peak stress concentration factor increases gradually, shows that the deeper the occurrence of coal strata, the thickness, the greater the possibility of impact earth pressure in the process of mining.