“三软”煤层开采围岩应力分布特征数值模拟研究

Numerical Simulation Study on Rock Stress Distribution of Mining in Three Soft Coal Seam

为全面了解“三软”煤层开采后围岩应力分布规律，运用FLAC30数值模拟软件，以某矿超长“三软”炮采工作面的实际工程地质情况为依据，分析了工作面回采时走向和倾向的应力分布特征。数值模拟结果表明：沿工作面走向的前后支承压力的分布情况基本一致，其影响范围基本相同；而侧向支承压力的最大值为该矿区原岩应力的1．2—1．8倍。

In order to completely study the characteristics of rock stress distribution of mining in three soft coal seam, by the means of FLAC3D numerical simulation, a long three soft blasting face in a certain mine with the actual engineering geology as the basis, the stress distribution characteristics of working face trend and tendency are analyzed. The resuhs show that abutment pressure before and after consistent with the distribution of working face trend, and the same sphere of influence. The maximum value of side abutment pressure for mining rock stress from 1.2 to 1.8 times.