关键词: 残留煤柱, 巷道布置, 围岩控制, 锚杆支护

Abstract: Taking roadway layout in 18m residual coal pillar of Ohoblak coal mine as background. By means of field measurement, theoretical analysis and numerical simulation, the stress environment and deformation state of the residual coal pillar in the goaf are studied. The vertical stress distribution, deformation mechanism and plastic distribution state of the coal pillar under the condition of narrow coal pillar with different width are analyzed, and the narrow pillar width in the laneway in the residual coal pillar in the goaf is determined as 4.0m. On this basis, the control principle and technology of roadway surrounding rock in residual coal pillar are put forward, and industrial tests are carried out. The actual maintenance effect of the test roadway is good.