花园煤矿条带煤柱稳定性数值模拟研究

Numerical Simulation Study of Band Coal Pillars Stability in Huayuan Coal Mine

为研究花园煤矿开采过程中条带煤柱稳定性,采用理论分析、数值模拟的手段,分别对煤柱内部应力、变形、塑性区分布特征进行研究。结果表明,条带煤柱内的应力集中程度明显高于边界煤柱,采空区中部煤柱应力集中系数最高,垂直位移量略高于其他煤柱,并且条带煤柱中部存在倒梯形的弹性核。

In order to study the stability of band coal pillars in the mining process of Huayuan Coal Mine,the distribution characteristics of stress,deformation and plastic zone in the coal pillar are studied by means of theoretical analysis and numerical simulation.The results show that the stress concentration degree in the band coal pillar is significantly higher than the boundary coal pillar,the stress concentration coefficient of the coal pillar in the middle of the goaf is the highest,the vertical displacement is slightly higher than other coal pillars,and there is an inverted trapezoidal elastic kernel in the middle of the band coal pillar.