深部巷道裂隙围岩危险体判定及应力监测预警

工程岩体是由节理、裂隙等结构组成的不连续介质体,深部巷道处于高地压、强扰动的复杂工程环境中,裂隙岩体的稳定性是深部工程安全稳定性研究的重要课题。本文以矿井深部巷道为研究对象,构建离散裂隙网络模型,获得等效岩体参数,并以此建立裂隙岩体工程模型;分析工程巷道裂隙围岩的应力、变形和破坏特征。模拟试验结果表明:斜联巷、釆联巷、水仓与主运输巷交叉等位置是应力集中区,易产生张拉、剪切破坏;根据数值模拟获得的应力集中危险区域分布特点,布设围岩应力监测网络,成功预警位于斜联巷和水仓连接巷的顶板塌落事故,为矿山设备、人员安全提供了可靠的保障。

Determination and monitoring of dangerous body of cracked surrounding rock in deep roadway

Engineering rock mass is composed of joints, fractures and other structural discontinuous medium body, deep roadway under high pressure, strong disturbance of complex engineering environment, the stability of the fractured rock mass is one of the important subjects of deep engineering safety stability study, in deep mine roadway as the research object, constructing discrete fracture network model, get the equivalent parameters of rock mass, and the fractured rock mass engineering model is set up; The stress, deformation and failure characteristics of surrounding rock in engineering roadway are analyzed. The results of simulation test show that the locations of inclined roadway, connecting roadway, sump and main transport roadway are stress concentration areas, which are prone to tensile and shear failure. According to the distribution characteristics of the stress concentration dangerous area obtained by numerical simulation, the surrounding rock stress monitoring network was set up, and the roof collapse accident located in the inclined gangway and sump connecting roadway was warned successfully, providing safety for mining equipment and personnel.