| Coal mine roadway stability control, especially under the condition of complex large section of soft rock roadway stability control, is one of the problems and difficulties faced by many mines. The increase of production scale and the expansion of well type, more and more big cross section coal seam alleys, the study of complex big cross section under the condition of soft rock roadway stability control technology has great realistic meaning and practical value.Changping mine is a large mine, its four main roadway are big cross section coal seam roadway, large span, surrounding rock joints and fissures development. Anchor net supporting is the original support of the main roadway supporting, with the passage of time, the original supporting invalidation, roadway deformation instability, to this end, the mine of roadway renovations for many times, greatly increased fee the roadway maintenance, visible research four main roadway feasible technology to repair, is technical problems to be solved of changping mine.Papers in changping coal mine belt transport as the specific object of study, on the basis of site investigation, Comprehensive theoretical analysis,numerical simulation and lab experiment, reasons of big cross section coal roadway surrounding rock instability and deformation failure mechanism is analyzed, based on the theory of grouting reinforcement and the surrounding rock control theory, put forward the maintenance policy of changping coal mine belt transport roadway, give a belt transport roadway repair scheme design, and to fix the on-site industrial experiment and mine pressure observation at the scene, to test the feasibility of repair plan, Eventually form suitable for changping mine section of coal roadway repair technology. |
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