不同岩体结构巷道冲击地压破坏特征的模型试验研究

Model Experimental Study on Failure Characteristics of Rock Burst in Roadways with Different Rock Mass Structures

深部煤矿的开采过程中,冲击地压的发生常造成井巷的破坏,通过两类岩体结构的物理模型试验,采用爆炸和静载共同作用的加载模式,在室内研究了巷道冲击地压的破坏特征。试验结果表明,在层状岩体结构的模型试验条件下,破坏主要表现为洞壁表面有薄层材料振落,而在小块状岩体结构的模型试验条件下,破坏表现为从爆心到洞壁出现较大塌落空腔,为深部煤矿巷道冲击地压的防治提供了借鉴。

In the process of mining in deep coal mine,the occurrence of rock burst often causes the destruction of roadway.Through the physical model test of two kinds of rock mass structure,the failure characteristics of roadway rock burst are studied in laboratory by using the loading mode of explosion and static load.The test results show that under the condition of model test of layered rock mass structure,the failure is mainly characterized by the vibration of thin layer material on the surface of cave wall,while under the condition of model test of small block rock mass structure,the failure is characterized by a large collapse cavity from the blasting center to the cave wall,which provides a reference for the prevention and control of rock burst in deep coal mine roadway.