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为了定量研究上行开采过程中上部煤层变形特征,从而制定相应的煤层采掘措施.采用数值模拟和相似材料模拟2种方法对矿井上行开采的可行性和上部煤层的变形及位移进行了分析.根据数值模拟和相似材料模拟结果:下部煤层的导水裂缝带发育高度为51.9~67.0 m,小于与上部煤层的层间距149 m,可以采取上行开采的方式;在此基础上,定量评价了上部煤层的变形,最大位移为1.30~1.82 m,并且从巷道掘进、矿压控制和回采时间间隔等方面制定了相应的措施.基于数值模拟和相似材料模拟分析上行开采的可行性和上部煤层变形可以作为上部煤层巷道掘进和工作面回采的依据.
In order to quantitatively study the deformation characteristics of the upper coal seam in the process of ascending mining, corresponding measures of coal seam mining are formulated, and the feasibility of upward mining and the deformation and displacement of the upper coal seam are analyzed by two methods of numerical simulation and similar materials simulation.According to the numerical value Simulation results of simulation and similar materials: The developmental height of the water-carrying fracture zone in the lower coal seam is 51.9 ~ 67.0 m, which is less than the interlayer spacing of the upper coal seam of 149 m, and can be taken as an upward mining method. On this basis, the upper coal seam Deformation, the maximum displacement of 1.30 ~ 1.82 m, and from the tunneling, pressure control and recovery time interval and other aspects of the development of measures.Study based on numerical simulation and similar materials simulation of the feasibility of the upstream mining and the upper deformation can be used as the upper Coal Roadway Tunneling and Working Face Backing Basis.