补连塔煤矿12416工作面过空巷支护技术研究

Research on Support Technology of 12416 Mining Face Passing through Empty Roadway in Bulianta Coal Mine

针对补连塔煤矿12416工作面过空巷,受超前支承压力影响导致空巷围岩严重破坏的问题,采用理论分析计算、数值模拟等研究方法,对空巷围岩破坏特征、空巷合理支护强度、支护密度进行了研究。结果表明:空巷与工作面贯通时,若巷道支护强度不足,将导致顶板关键块失稳,加剧巷道围岩破坏,进而导致支架压死;提出柔模泵送支柱支护工艺,通过对顶板支护强度分析得出1;空巷支柱所需支撑的顶板压力为87025 kN,需要支柱数量约为25根,2#空巷所需支撑的顶板压力为239696.4 kN,需要支柱数量约为69根;数值模拟了空巷在柔模泵送支柱支护情况下围岩破坏情况,巷道围岩塑性区显著减小,围岩得到了有效维护,保证了工作面的安全生产。

Aiming at the problem that 12416 mining face of Bulianta coal mine passes through empty roadway,the surrounding rock of empty roadway is seriously damaged due to the influence of advance abutment pressure,based on theoretical analysis and numerical simulation,the failure characteristics of surrounding rock,reasonable support strength and support density are studied.The results show when the roadway is connected with the mining face,if the roadway support strength is insufficient,it will lead to the instability of the key block of the roof,aggravate the damage of the surrounding rock of the roadway,and then lead to the support crushing;the supporting technology of flexible model pumping prop is put forward,through the analysis of roof support strength,it is concluded that the roof pressure of No.1 empty roadway is 87025 kN,and the number of pillars is about 25,while the roof pressure of No.2 empty roadway is 239696.4 kN,and the number of pillars is about 69;through the numerical simulation,it is found that the plastic zone of surrounding rock is significantly reduced,the surrounding rock is effectively maintained,and the safe production of the mining face is ensured.