煤层巷道围岩位移及塑性区演化规律数值模拟

Numerical simulation of displacement and plastic evolution of roadway surrounding rock

以鲍店煤矿某回采工作面为背景,运用FLAC 3D数值模拟软件,分析了回采工作面对前方大巷的运移及塑性区破坏演化规律。通过研究表明,随着工作面的推进,工作面前方大巷的运移及塑性区逐渐增加。当工作面推进至距大巷30m时,大巷顶底板位移明显增加,靠近工作面的大巷生产帮塑性区出现向工作面方向扩展的现象,随着工作面的继续推进,大巷塑性区破坏程度急速增加。通过模拟分析可为工作面的合理开采及工作面前方大巷推进提供参考依据。

Taking the FLAC 3 D numerical simulation software, this paper analyzed the migration and the evolution rule of the working area in the front lane and the failure of the plastic zone in the back of the mining face of Baodian Coal Mine. The results show that with the advance of the working face, the migration and plasticity of the roadway in the front face of the working face gradually increase. When the working face is advanced to 30m away from the roadway, the displacement of the roof and floor of the roadway is obviously increased, Production to help the plastic area to the face of the expansion ; crease in the degree of damage to the alley. Through simulation with the face continue to advance, the rapid inanalysis, it can provide reference for reasonable mining of working face and front roadway in working face.