Abstract:
In order to solve the deformation and instability problem of surrounding rock caused by multiple severe mining dynamic load of double roadway layout, taking No.3101 working face auxiliary transportation roadway of Dongliang Coal Industry as engineering background, the deformation and failure mechanism and control technology of the surrounding rock of the test roadway were systematically studied by using a variety of research methods including field measurement, drilling and peeping, numerical simulation and engineering practice. It is shown that the direct cause of roadway surrounding rock damage is the effect of multiple mining and lack of pertinence of surrounding rock control scheme. Therefore, the reinforcement control measures for surrounding rock based on the support concept of “three-height” (high-strength full-section anchor network + high-strength extension anchor rod + high-prestress strong anchor cable) is proposed. The feasibility is verified by field engineering practice, which ensures the safety and stability of surrounding rock in the whole process of mining.