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 is 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.Taking deep mine roadway as the research object, constructing discrete fracture network model, getting 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 is set up, and the roof collapse accident located in the inclined gangway and sump connecting roadway is warned successfully, providing safety for mining equipment and personnel.