突出煤层掘进巷道冲击地压防治技术

为了在垂深1 100 m、具有严重煤与瓦斯突出和冲击地压危险的煤层进行安全快速掘进,消除冲击地压和煤与瓦斯突出危险,应用巷道钻孔松动爆破卸压技术.通过对冲击地压发生机理和钻孔松动爆破卸压理论分析,研究了深井煤层卸压原理,确定了巷道钻孔松动爆破卸压技术参数和施工工艺.试验结果表明:利用瓦斯抽排巷道对掘进煤层进行打钻和松动爆破,在一定范围使突出煤层卸压、排放瓦斯,可使原始高地应力场发生改变,并沿巷道掘进方向向前方煤体和巷道两帮深部转移,同时提高煤层透气性,使高压瓦斯加速排放,减少了突出势能,有效防治煤与瓦斯突出和冲击地压.

Technology of bumping prevention and control for gateway driving in seam with outburst in potential

In order to have a safety and rapid driving in a seam with a serious coal and gas outburst and a bumping danger in potential and with a mine depth of 1 100 m and to eliminate the bumping and the coal and gas outburst danger, a borehole standing blasting and pressure releasing technology was applied to the seam gateway driving. With the analysis on the bumping occurred mechanism and the borehole standing blasting and pressure releasing theory, the paper studied the seam pressure releasing principle of the de...