赵楼煤矿5311工作面矿压监测与支护体系改进

Mine Pressure Monitoring and Support System Improvement of the 5311 Working Face in Zhaolou Coal Mine

  • 摘要: 针对赵楼煤矿5311工作面断层构造发育、煤层分岔及中等冲击地压条件下矿压显现剧烈、支护适应性不足的问题,基于地质赋存条件与动态监测数据,构建以SOS微震和KJ95X安全监控系统为核心的“区域+局部”监测体系,明确FZ8断层影响区、煤层分岔带及冲击危险区的对应关系;通过分析支架工作阻力、顶板离层及围岩变形特征,优化分区域支护参数:强冲击区(支架间距3 m、超前支护350 m) 、中等冲击区(支架间距4.5 m、超前支护250 m)和弱冲击区(支架间距6 m、超前支护200 m),并采用大直径超前钻孔卸压与预应力锚索加强支护。实施后,支护成本虽增加13.1%,但顶板离层降低26.5%,支护维修率下降62.8%,月均推进进度增加8.8%。

     

    Abstract: In view of the problems of severe mine pressure behavior and insufficient support adaptability under conditions of fault structure development, coal seam branching, and moderate rock burst, in the 5311 working face of Zhaolou Coal Mine, based on geological occurrence conditions and dynamic monitoring data, a "regional+local" monitoring system with SOS microseismic and KJ95X safety monitoring system as the core is constructed to clarify the corresponding relationship between the FZ8 fault impact zone, coal seam branching zone, and impact danger zone; By analyzing the working resistance of the support, roof layer separation, and surrounding rock deformation characteristics, the support parameters for different zones are optimized: strong impact zone (support spacing of 3 m, advanced support of 350 m), moderate impact zone (support spacing of 4.5 m, advanced support of 250 m), and weak impact zone (support spacing of 6 m, advanced support of 200 m). Large diameter advanced drilling pressure relief and prestressed anchor cables are adopted to strengthen the support. After implementation, though the support cost is increased by 13.1%, the roof layer separation is decreased by 26.5%, the support maintenance rate is decreased by 62.8%, and the average monthly advancing progress is increased by 8.8%.

     

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