In order to solve the problem of surrounding rock control in soft coal seam roadway, taking the centralized return airway of No. 2 coal seam in Liangdu Coal Industry as the research background, the mechanical con...In order to solve the problem of surrounding rock control in soft coal seam roadway, taking the centralized return airway of No. 2 coal seam in Liangdu Coal Industry as the research background, the mechanical conditions of roadway surrounding rock were analyzed by means of field investigation, rock mechanics experiment and numerical simulation. The design principles of roadway support in soft coal seam were put forward: high strength anchor cable support, high preload support and high stiffness support. The bearing capacity of surrounding rock was strengthened by anchor cable support, and the deformation and failure of surrounding rock were effectively controlled. Through the numerical simulation method, the deformation and plastic failure range of roadwaysunder different support schemes are compared and analyzed. The support scheme of centralized transportation roadway is studied and determined, and the field test is carried out, which effectively controls the deformation of surrounding rock of roadway in weak coal seam.展开更多
基金the financial support from the National Natural Science Foundation of China (52173177, 21971185, and 52203234)the Natural Science Foundation of Jiangsu Province (BK20221362)+8 种基金the Science and Technology Support Program of Jiangsu Province (TJ-2022-002)Jiangsu Funding Program for Excellent Postdoctoral Talent (2023ZB580)supported by Suzhou Key Laboratory of Functional Nano & Soft MaterialsJiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University (KJS2156)Collaborative Innovation Center of Suzhou Nano Science & Technologythe 111 ProjectPriority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)Joint International Research Laboratory of Carbon Based Functional Materials and DevicesSoochow University Tang Scholar
文摘In order to solve the problem of surrounding rock control in soft coal seam roadway, taking the centralized return airway of No. 2 coal seam in Liangdu Coal Industry as the research background, the mechanical conditions of roadway surrounding rock were analyzed by means of field investigation, rock mechanics experiment and numerical simulation. The design principles of roadway support in soft coal seam were put forward: high strength anchor cable support, high preload support and high stiffness support. The bearing capacity of surrounding rock was strengthened by anchor cable support, and the deformation and failure of surrounding rock were effectively controlled. Through the numerical simulation method, the deformation and plastic failure range of roadwaysunder different support schemes are compared and analyzed. The support scheme of centralized transportation roadway is studied and determined, and the field test is carried out, which effectively controls the deformation of surrounding rock of roadway in weak coal seam.
