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为了研究临近断层分层开采的冲击地压发生机制,以老虎台矿特厚煤层开采为研究背景,采用地质动力区划方法、数值模拟和现场监测方法对井田的地质动力环境、临近断层开采的围岩应力分布规律和断层滑移特征及其与冲击地压的关系进行了研究。采用地质动力区划方法,将老虎台井田断裂构造划分为5级,通过地震和矿震分布情况,确定老虎台矿地质构造活跃,处于较高的应力环境;采用FLAC3D数值模拟和锚索应力监测方法,分析断层围岩应力演化规律和断层滑移规律,在断层和开采共同作用下工作面断层侧超前支承压力急剧升高。结果表明,地质动力环境为冲击地压的发生创造了外界环境条件,断层和采动的耦合作用是冲击地压诱发的主要原因。
In order to study the mechanism of rockburst near the fault stratification mining, taking the mining of the thick seam in the Huntai Mine as the research background, the geodynamic dynamic environment of the mine field, the surrounding of the fault mining Rock stress distribution and fault slip characteristics and their relationship with rockburst. According to the geological dynamic zonation method, the fault structure of the Tiger Terrace Minefield is divided into five grades. According to the distribution of earthquakes and mine shocks, the geological structure of the Tiger Terrace Mine is determined to be active and in a high stress environment. By using FLAC3D numerical simulation and stress monitoring of anchor cables , Analyzes the stress evolution law and fault slip law of the surrounding rock of the fault, and under the joint action of faults and mining, the advance bearing pressure on the fault side of the working face rises sharply. The results show that the geodynamic environment creates external environmental conditions for the occurrence of rockburst, and the coupling between faults and mining is the main reason for rockburst.