综放工作面小煤柱沿空掘巷煤柱尺寸留设研究

Research on the Size Retention of Small Coal Pillars in Goaf Driven Roadway of Fully Mechanized Top Coal Caving Face

为合理留设综放工作面沿空掘巷煤柱,以山西某矿E4102-1工作面运输顺槽煤柱留设工程概况为例,通过进行调研分析与进行数值模拟分析,并结合工业性试验,得出窄煤柱沿空掘巷技术目前已相对较成熟,可把煤柱尺寸留设为5 m至8 m之间;通过对几种煤柱尺寸下的巷道围岩破坏状况进行数值模拟分析,得出该工作面巷道留设5 m宽的煤柱时,该巷道矿压不会出现明显显现,巷道变形量相对较小,巷道顶板也相对较稳定,能很好的满足矿井安全生产需求,更好地保障矿井安全生产。

In order to reasonably set coal pillar for gob-side entry driving in fully mechanized top-coal caving face,taking the general situation of coal pillar setting in transport gateway in E4102-1 working face of a mine in Shanxi as an example,through investigation and numerical simulation analysis,combined with industrial experiments,it is concluded that the technology of gob-side entry driving with narrow coal pillar is relatively mature,and the size of coal pillar can be set at 5 m to 8 m.Through the numerical simulation analysis of the surrounding rock failure of several coal pillar sizes,it is concluded that when a coal pillar with a width of 5m is left in the roadway of this working face,the ground pressure of the roadway will not appear obviously,the deformation of the roadway is relatively small,and the roof of the roadway is relatively stable,which can well meet the requirements of mine safety production and better ensure mine safety production.