论文部分内容阅读
高瓦斯突出煤层预抽瓦斯消突是突出矿井煤巷掘进前的主要技术措施。由于我国煤矿煤层透气性低,原始煤层预抽瓦斯效果差,抽放时间长。为提高低透气性高瓦斯突出煤层的抽采瓦斯消突效果,在潘三煤矿1271(3)运顺进行了底板穿层钻孔水力压裂强化抽采瓦斯消突试验。介绍了穿层钻孔水力压裂抽采钻孔的布孔设计、压裂工艺及压裂增透抽采瓦斯消突效果。结果表明,水力压裂技术有效扩大了钻孔抽采瓦斯半径,提高了抽采瓦斯消突效果,解决了高突煤层煤巷掘进的突出威胁,提高了煤巷掘进速度。
Gas outburst in advance in high gas outburst coal seam is the main technical measure to highlight the coal mine roadway before heading. Due to the low permeability of coal seam in China, the effect of pre-pumping gas on the original coal seam is poor and the drainage time is long. In order to improve the gas outburst effect of gas drainage in low gas permeability and high gas outburst coal seam, a gas burst test was conducted to reinforce gas drainage through floor penetrating hydraulic fracturing in the 1233 (3) Yun-Shun coal mine in Pansan Coal Mine. The drilling design, fracturing technology and fracturing anti-seepage effect of gas drainage in the borehole through hydraulic fracturing in borehole drilling are introduced. The results show that the hydraulic fracturing technology can effectively expand the gas radius of gas drainage in drilling, improve the gas outburst effect of gas drainage, solve the outstanding threat of high-pressure coal seam tunneling and improve the tunneling speed.