薄煤层螺旋钻开采钻采宽度和煤柱宽度的研究

Study on the width of spiral drilling and coal pillar in thin coal seam spiral drilling mining

以晋新煤矿为例,运用"简支梁"和"固定梁"的理论计算螺旋钻采的最大宽度。根据钻采空间的力学关系,结合钻孔采空区不同的处理方式,探讨了薄煤层隔离煤柱的受力特点。按照有效面积理论推导出了钻采煤柱宽度的计算公式,对薄煤层螺旋多孔钻采提供了实际的指导。

Jinxin Mine was taken as example, the maximum of spiral drilling width was calculated by beam theory. Based on drilling mining space mechanical relationship, combined with different ways of goaf drilling, mechanical characteristics of thin coal seam isolated coal column were discussed. The formula of drilling mining coal column width was deduced by effective area theory, with guidance significance for coal seam multiple spiral drilling mining.