采矿与安全工程学报2016，Vol.33Issue(3)：551-556,6.DOI:10.13545/j.cnki.jmse.2016.03.026
仿岩孔条件下顺层钻孔瓦斯压力测定技术研究
Pressure measurement technology of drilling borehole down the seam in imitative rock hole
摘要
Abstract
During the measurement of gas pressure in borehole embedded in coal seam, drilling defor-mation and collapse are very difficult to avoid. In order to fundamentally seal the cracks around bore-hole in coal seam, gas pressure measurement method conducted in borehole embedded in imitative rock has been put forward in this paper. The mechanical analysis of drilling instability shows that the radius of drilling fracture zone is relevant to rock lithology. Improving the internal friction angle and the cohe-sion of surrounding rock is an effective way to enhance the strength of rock. Moreover, through mecha-nism analysis of solidified borehole in coal seam and numerical simulation, it has been found that high pressure grouting technique applied to coal seam can strengthen the intensity of borehole surface. Field comparison tests show that the difference between gas pressure measured in imitative rock borehole and rock borehole is 0.02 MPa and its relative error is only 3.85%. Consequently, gas pressure measurement method in imitative rock borehole is feasible and has a promising future.关键词
瓦斯压力测定/失稳/破碎带/高压注浆/仿岩孔Key words
gas pressure measurement/instability/fracture zone/high pressure grouting/imitative rock borehole分类
矿业与冶金引用本文复制引用
田世祥,蒋承林,史吉胜,潘兴峰,陈裕佳..仿岩孔条件下顺层钻孔瓦斯压力测定技术研究[J].采矿与安全工程学报,2016,33(3):551-556,6.基金项目
江苏省自然科学基金项目(BK20150180) （BK20150180）
