Study On Breakage Mechanism And Reinforcement Control Technology Of Deep Cracked And Weak Surrounding Rock Of Roadway

The coal is the main energy resource in our country, with the resource decreasing and lacking situated in shallow, coal exploitation of our country's mine gradually turns to the deep. With the shaft extending to the deep and the stress environment deteriorating, many problems which don't expose in the shallow coal seams markedly appear in the deep as a result. Because the strength of surrounding rock lying in many structural fractured zone is very low, in the function of the high stress, the surrounding rock behaves the non-linear big deformation and the obvious creep deformation characters, which brings forward this kind roadway support difficulty, and seriously affects the mine's support safety. So study on deformation mechanism, deformation laws and controlling measures are of great importance theoretically and practically.In order to solve the control difficulty of roadway's surrounding rock under the condition of deep, fracture and weakness, the dissertation studies the deformation breakage of this kind roadway, finds the means of the roadway's surrounding rock control and reinforcement methods, forms the reinforced control technology by the way of typical experiment, theoretical analysis, numerical simulation and local engineering experiment.According to the main factors of the roadway's surrounding rock deformation breakage, it is classified the superficial roadway surrounding rock fracture, shallow roadway's surrounding rock stress flash and the longtime rheology under the condition of high-stress, its mechanism is researched for providing the theoretical foundation to the pertinent engineering methods.Because of the polytropy of the various inducements which result in the surrounding rock deformation breakage of the deep, fractured, soft rock roadway, the complexity of the deformation law, also the difference of various support manners'control mechanism, aiming at the deep, fractured soft surrounding rock, it is put forward the control concept of dynamic strengthen process control and the system reinforced control technologies of the grouting reinforcement in the deep, fractured rock, the bearing structure reinforcement, the structural reinforcement of the novel bolting support and the pertinent reinforcement to the key weak parts, the reinforced control technology system of the deep, fracture soft rock roadway's surrounding rock is formed.Aiming at the special fractured soft rock condition in the zhuxianzhuang mine, the reasonable program and parameters of the surrounding rock control are determined by the way of numerical simulation research, in the typical fractured soft rock II 5 ventilation rise entry, using the reinforced control technology has succeed in the engineering practice, gains the obvious technical economy and social benefit.