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充填法开采被广泛应用于隐患资源2次开采中,研究充填体与岩体耦合作用机理,对充分利用矿产资源、保护地表建筑物、延长矿山服务年限等方面具有十分积极的作用.以程潮铁矿西区选厂下遗留矿柱2次开采为研究背景,通过对尾砂胶结充填体的无侧限单轴抗压正交力学试验,得到了不同灰砂比、不同浓度、不同龄期参数与充填体单轴抗压强度的曲线关系和多参数线性回归方程式,同时分析了影响充填体抗压强度的主次因素.最终依据充填体与岩体能量匹配原则,通过数值模拟并充分考虑回采中爆破震动对采场稳定性的影响,得出最优充填方案.
Filling method mining is widely used in the second exploitation of hidden resources, studying the mechanism of coupling between filling bodies and rock mass has a very positive effect on making full use of mineral resources, protecting surface buildings and prolonging the service life of mines. As the research background, the secondary mining of the remaining ore column under the West Area dressing plant was studied. Through unilateral uniaxial compressive orthogonal test on the tailings cemented filling body, the effects of different sand-sand ratio, different concentration, different age parameters and filling The uniaxial compressive strength curve and the multi-parameter linear regression equation, and analyzed the primary and secondary factors that affect the compressive strength of filling body.According to the energy matching principle of filling body and rock mass finally, numerical simulation and full consideration of blasting Vibration on the stability of stope, get the best filling program.