青龙寺煤矿3-2煤层东翼辅助运输大巷顶板注浆加固方案研究

Roof grouting reinforcement for east wing auxiliary transportation main roadway of 3-2 coal seam in Qinglongsi Coal Mine

  • 摘要: 【目的】针对青龙寺煤矿3-2煤层东翼辅助运输大巷受上方积水坑威胁、顶板稳定性差的问题,开展了顶板注浆加固方案设计研究。【方法】通过分析工程地质条件,确定采用浅孔注浆加固方式。详细设计了钻孔参数,包括在不同区域的钻孔排数、排距、孔口间距及孔深等;设定注浆压力为10~15 MPa,合理确定浆液扩散半径、单孔注入浆量等关键参数,并选用矿用有机加固材料。制定完善的注浆加固工艺流程,涵盖从标孔到验收的多道工序。【结果及结论】在该方案实施后,能够有效增强大巷顶板稳定性,并阻隔积水渗透,从而保障巷道掘进与后续使用安全,为类似工程提供了可借鉴的范例。

     

    Abstract: This paper addresses the issues of the 3-2 coal seam east auxiliary transportation roadway in Qinglongsi Coal Mine, where it is menaced by overlying water accumulation pits and exhibits poor roof stability.A comprehensive study on the design of the roof grouting reinforcement scheme is carried out.Through analysis of the engineering geological conditions, the shallow-hole grouting reinforcement approach is determined.The drilling parameters are elaborately designed.Specifically, the number of borehole rows, row spacing, hole mouth spacing, and hole depth in diverse areas are precisely defined.The grouting pressure is set within the range of 10~15 MPa.Meanwhile, key parameters like the slurry diffusion radius and the single-hole injection volume are rationally determined.A high-performance mine organic reinforcement material is selected.An elaborate grouting reinforcement process is established, encompassing a series of procedures from hole marking to final acceptance.Once implemented, this scheme can significantly enhance the stability of the roadway roof, effectively prevent the infiltration of accumulated water, and guarantee the safety of roadway excavation and subsequent operation.

     

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