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以某矿充填工作面收作眼撤架通道大、支护难度高等难题为背景,采用理论分析、数值模拟和工业试验相结合的方法,对充填采煤大断面收作眼围岩变形特征及控制技术进行研究。在充填收作眼围岩结构特征的基础上,利用FLAC~(3D)数值模拟软件对收作眼的围岩变形破坏规律进行了模拟分析,得出在不同的充实率、采高以及撤架数条件下收作眼围岩的变形特征及围岩应力分布规律,并提出了充填大断面收作眼的围岩控制技术,同时将该技术在某矿2302充填面进行了工业性试验,结果表明:在整个撤架过程中收作眼的顶板下沉增量仅为60 mm,收作眼围岩变形得到了有效控制。
Taking the problem that the mining face of a mine receives the large tunnel with a large withdrawal tunnel and the difficulty of supporting is high, using the method of theoretical analysis, numerical simulation and industrial experiments, Control technology research. Based on the structural characteristics of surrounding rock filled by confining eyes, the deformation and failure of the surrounding rock of the receiving eye were simulated and analyzed by using FLAC 3D numerical simulation software. The results showed that under different filling rates, Several conditions under the surrounding rock deformation and the surrounding rock deformation stress distribution rules, and put forward a large section of the closure of the surrounding rock filling control technology, at the same time the technology in 2302 filling surface of a mine industrial test results It shows that the increment of sunken roof is only 60 mm during the entire withdrawal process and the deformation of surrounding rock is effectively controlled.