摘要
针对下峪口煤矿23305下分层的回采巷道顶板厚度仅8～10m,且伴有大量淋水情形,在掘进过程中变形严重,甚至局部整体垮塌,为此进行了巷道围岩力学实验、松动圈测试和钻孔窥视测试,研究发现顶板岩块的力学性能好,但松动范围却达到2.5m,支护方案中锚杆长度为2.4m,初步判断排间距大是造成巷道失稳的主要成因,而形成这种结果的主因是距离采空区太近以及采空区积水侵入巷道顶板造成,研究结果对类似条件下的巷道支护起到借鉴作用。
Because the roof to the upper goal distance is only 8 -10ms,and which is wet under the water, the roof was very serious deformation, and surrounding rock experiment , the even there was somewhere had partial collapsed . so we take The mechanics of roadway surrounding rock loose circle and borehole camera equipment to experience , but we found that the mechanical properties of roof rock block was well, and the loose range is up to 2.5m, The length of bolt supporting scheme for 2.4m, the long row spacing is the biggest reason in all of questions, as the very short distance is so small and the amounts of water into the collapse of the roof , the research on this program is very available for the similar condition and is the better example.
出处
《内蒙古煤炭经济》
2013年第12期51-53,共3页
Inner Mongolia Coal Economy
关键词
极近距离
采空区
巷道支护
松动圈
钻孔窥视法
Very short distance
goaf
roadway support
relaxation zone
borehole camera equipment
