孤岛工作面回采巷道护巷小煤柱合理宽度的确定

Analysis of the width of small coal pillar in the isolated working face

为了确定1402孤岛工作面护巷小煤柱的合理宽度,通过相关计算得出,煤帮内支承压力峰值距煤壁12.04m。为确定合理支护宽度,建立了煤柱宽度为5m、7m、9m和11m四个模型,分析其塑性区域分布图、垂直应力分布图,并结合经济合理性,最终确定煤柱宽度为7.0m。

In order to determine the reasonable width of the small coal pillar in1402isolated working face,through the related calculation,the peak value of the support pressure is12.04m from the coal wall.In order to determine the reasonable support width,in four models were established that the width of coal pillar is for5m,7m,9m and11m,analysis of the plastic zone distribution,vertical stress distribution were analyzed,combined with economic rationality,and ultimately determine the coal pillar width that is7.0m.