基于3DEC的断层孤岛工作面回采矿压显现规律的数值模拟与防治措施

    Simulation Modeling for Mining Pressure Behavior Laws at Isolated Working Face of Fault Based on 3DEC and It’s Control Measures

    • 摘要: 为了对含断层孤岛工作面的巷道围岩稳定性和顶煤冒落性进行有效控制,以某矿237工作面地质条件为工程背景,采用3DEC软件模拟分析了工作面回采过程中的应力场分布状态及变化规律,在此基础上,提出了冲击地压综合防治措施。结果表明:受上覆岩层运动的影响,进、回风巷附近的煤柱以及工作面前方20 m范围内的煤体应力显现明显;当工作面回采至断层附近处,迅速形成高应力集中,极易诱发冲击地压;经实践检验,所采取的冲击地压综合防治措施取得良好的应用效果,保障了矿井的安全生产。

       

      Abstract: In order to effectively control the stability of surrounding rock and the capability of top coal caving for isolated working face containing fault, taking the geological conditions of 237 working face of a mine as the engineering background, the distribution state and variation laws of pressure field during caving process are simulated and analyzed by using 3DEC software. On the basis of this, the integrated control measures for rock burst are proposed. The results show that stress behavior in coal pillar near intake and return airflow roadways and coal body in front of caving face 20 m range is obvious. When the caving face is close to the fault, the high stress concentration is rapidly formed, which can induce rock burst easily. The comprehensive control measures of rock burst achieved good application effect through the practical test, and ensured the safety production of the mine.

       

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