不同侧压系数对立井穿煤层井筒围岩稳定性影响分析

Analysis of the Influence of Different Lateral Pressure Coefficient on the Stability of Surrounding Rock of Shaft Through Coal Seam

为探究侧压系数对立井穿煤层井筒围岩稳定性的影响机制,使用FLAC^(3D)软件分析中裕煤矿副井穿煤层的围岩变形及塑性区发育特性。在围岩力学特性测试的基础上,使用数值模拟方法进行研究。研究结果表明,随着侧压系数的增加,井筒的位移、应力以及塑性区都有不同程度的增加,较高的侧压系数会使井筒围岩的稳定性下降,较低的侧压系数更有利于井筒围岩稳定性。

In order to explore the influence mechanism of lateral pressure coefficient on the stability of surrounding rock of through coal seam,FLAC^(3D) software is used to analyze the surrounding rock deformation and plastic zone development characteristics of through coal seam of auxiliary shaft in Zhongyu Coal Mine.Based on the test of the mechanical properties of surrounding rock,the numerical simulation method is used to study it.The results show that the displacement,stress and plastic zone of the wellbore increase with the increase of the lateral pressure coefficient,and the higher lateral pressure coefficient will decrease the stability of the surrounding rock of the wellbore.The lower lateral pressure coefficient is more beneficial to the stability of the surrounding rock of the wellbore.