长壁工作面顺槽煤柱加固技术研究

顺槽煤柱的稳定性是决定回采巷道稳定的关键,是保证相邻两工作面顺利回采的隔离体.影响煤柱强度的因素有很多,仅仅是合理的煤柱宽高比不足以支持覆岩载荷,而且还会造成严重的资源浪费,针对厚煤层的开采所留设的煤柱,在满足宽高比为8的情况下,煤柱宽度就达到了45m,这不仅造成了煤炭资源的浪费,而且在煤层回采后较宽的间隔煤柱会形成应力集中,对下层煤安全生产造成严重的威胁.因此,通过对煤柱外侧进行加固增加煤柱的强度来减小煤柱宽度是行之有效的方法.

Study on Improvement Technology of Coal Pillar of Roadway in Long-wall Mining Face

The stability of coal pillar slot is to determine the key extraction roadway stability, is to guarantee the smooth recovery between two mining face isolation bodies. Influence factors of coal pillar strength has a lot of, is only reasonable aspect ratio of coal pillar width to support strata load, but also can cause serious waste of resources, according to coal mine of thick coal seam leave set of coal pillar, and to meet wide aspect ratio of 8 cases, coal pillar width to reach 45 m, this not only caused coal waste of resources, and in coal seam mining of coal pillar after a wider intervals will form stress concentration, of the lower coal safety production cause serious threat. So, by the side of the coal pillar of the strength of the coal pillar reinforcement increases to reduce coal pillar width is effective method.