关键词: 切顶留巷, 高应力区, 耦合支护, 围岩控制

Abstract: In order to solve the problem that the surrounding rock in the deep high stress area is broken and the initial support means can not effectively control the surrounding rock, the research on the surrounding rock control technology of the cutting top and retaining roadway is carried out under the actual engineering background of a deep mining face in chensi floor. According to the geological conditions of the working face, the deformation mechanism of the remaining roadway is analyzed, and the blasting parameters and the supporting scheme of the initial roadway are designed. In view of the large deformation of the roadway and the broken surrounding rock in the process of advancing the working face, this paper designs a scheme of reinforcing the roadway by cutting the roof and retaining the roadway: a new type of quick setting and early strength inorganic double liquid grouting material is used to reinforce the broken surrounding rock of the cutting roof and retaining the roadway, so as to control the deformation of the roadway quickly and effectively; at the same time, the measures of retaining the gangue by the side of the roadway with the flexible gangue retaining wall are designed to realize the combination of active and passive roof cutting and retaining the gangue Roadway reinforcement support mode. The results show that the roadway reinforcement technology is adopted in a working face of Chensilou Mine. Under the action of secondary mining stress, the maximum roof subsidence is 147 mm, the maximum displacement of two sides is 335 mm, and the maximum floor floor heave is 402 mm. The surrounding rock of the retained roadway is effectively controlled.