某矿深部主石门巷道硬性围岩卸荷效应分析

Analysis on Unloading Effect of Hard Surrounding Rock in Deep Main Crosscut Roadway of Mine

结合典型深部矿山巷道工程,分析考虑卸荷效应的深部巷道开挖破坏机理,并提出有效的控制措施。基于开挖卸荷理论与虎克定理,采用有限元方法构建某煤矿-850 m水平主石门巷道开挖岩体卸荷等效三维模型。在该三维模型基础上计算确定卸荷区域,利用数学工具构建并拟合出各卸荷区卸荷量变化值和岩体力学参数相关的函数式,找到相应的裂化规律,为类似工程实践提供技术依据。

In combination with the project of typical deep mining roadway,this paper analyzes the failure mechanism of excavation of deep roadways considering unloading effect and puts forward effective control measures.Based on the excavating unloading theory and Hooke theory,the method of finite element method is used to construct the equivalent 3D model of excavating rock mass unloading of a coal mine-850 m horizontal main stone gate.