深井大地压泵房围岩变形破坏特性研究

Study on pump excavation deformation and fracture with complex stress under deep mining and high pressure

以峰峰集团有限公司万年矿-440泵房为例,对深井大地压泵房围岩在复杂应力条件下围岩变形及其特征进行了现场观测及分析研究。结果表明在复杂应力条件下深井大地压围岩具有明显的流变特性,其变形表现为全断面不规则变形,底鼓是导致围岩破坏的主要原因。

Field measure and analysis on its deformation with complex stress state under high deep mining and high pressure by taking pump excavation of Fengfeng Group Mine Wannian as example. The results show that the deformation of excavation with complex stress state under deep mining and high pressure is visible rheonomic deformation and displacement like soft rock. Its deformation and displacement is irregular one in whole section. The floor heave is main reason to excavation fracture.