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针对小官庄铁矿西区的地质和采矿条件,分别采用采场地压的宏观调查、巷道变形收敛量测、三维弹塑性有限元分析和三维光弹性试验等手段,揭示了用无底柱分段崩落法开采小官庄铁矿西区深埋,软弱破碎围岩和缓倾斜矿体采场地压显现规律。采场地压的显现具有明显的分区分带特征,不同区带中的地压活动程度有很大差异,采场地爪显现具有动态特征。最后指出了影响采场地压显现的重要因素。在—260m水平开采中,采取了相应的措施,有效地控制了地压,获得了巨大成功。
Aiming at the geology and mining conditions in the West of Xiaoguangzhuang Iron Mine, a macro-investigation of stope pressure, laneway deformation convergence measurement, three-dimensional elasto-plastic finite element analysis and three-dimensional photoelasticity test are used respectively to reveal that the non- Caving method mining Xiaoguangzhuang iron mine in the western part of the deep, soft and weakly crushed ore and gently inclined ore body mining ground pressure law. The appearance of stope pressure has obvious characteristics of zonation and zoning. The degree of ground pressure activity in different zones varies greatly, and the dynamic behavior of stope appears in the stope. Finally, it points out the important factors that affect the appearance of ground pressure. In the level of -260m mining, take corresponding measures to effectively control the pressure, has been a great success.