王村煤矿煤柱稳定性和煤柱尺寸优化研究

Study on Coal Pillar Stability and Coal Pillar Size Optimization in Wangcun Coal Mine

采用实验室测试和数值模拟方法对王村煤矿护巷煤柱的稳定性进行了分析研究。通过煤样单轴抗压强度试验估算出煤体强度介于1.9~12MPa之间,煤样宽高比与其抗压强度有显著正相关关系,实验数据拟合了王村煤柱强度公式。通过数值模型分析可知,12m煤柱可以兼顾煤柱稳定性和提高采出率的要求,实际应用情况理想。

The stability of coal pillar in Wangcun Coal Mine is studied by laboratory test and numerical simulation.According to the uniaxial compressive strength test of coal sample,the strength of coal body is estimated to be between 1.9 and 12MPa,and the width height ratio of coal sample has a significant positive correlation with its compressive strength.The experimental data fit the strength formula of Wangcun coal pillar.Through the numerical model analysis,it can be seen that the 12m coal pillar can take into account the requirements of coal pillar stability and improving the recovery rate,and the practical application is ideal.