煤矿类孤岛工作面安全开采影响因素及可控性分析

Influential factors and controllability analysis for safe mining in island working face of coal mines

  • 摘要: 【目的及方法】以山东良庄矿业有限公司41106类孤岛工作面为研究对象,针对其开采过程中面临的冲击地压风险,综合运用理论分析、数值模拟及工程类比法,系统研究了地质构造、采空区分布及煤柱应力集中等危险因素的影响规律。通过FLAC3D数值模拟分析了工作面回采过程中超前支承压力的演化特征,并结合邻近工作面的矿压监测数据,验证了工作面支架支护强度的适应性。【结果及结论】研究表明,41106工作面受断层切割及三面采空影响,煤柱区域应力集中显著,其中断层煤柱存在失稳风险;通过优化煤柱宽度和加强支护措施,可有效降低冲击地压发生概率。研究成果可为相似工作面安全开采提供参考。

     

    Abstract: Taking the 41106 island-like working face of Shandong Liangzhuang Mining Co., Ltd. as the research object, this study systematically investigates the influential patterns of hazardous factors including geological structures, goaf distribution, and coal pillar stress concentration during mining under rock burst risks, employing comprehensive methods including theoretical analysis, numerical simulation, and engineering analogy. FLAC3D numerical simulation was utilized to analyze the evolution characteristics of advanced abutment pressure during the mining process of the working face. Combined with strata pressure monitoring data from adjacent working faces, the adaptability of support strength for the working face brackets was verified. The research indicates that the 41106 working face, affected by fault cutting and three-side goaf conditions, exhibits significant stress concentration in coal pillar areas, with potential instability risks in fault-related coal pillars. The study demonstrates that optimizing coal pillar width and enhancing support measures can effectively reduce the probability of rock burst occurrences.

     

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