急倾斜煤层巷道围岩变形破坏机理及支护研究-wjc.docVIP

急倾斜煤层巷道围岩变形破坏 魏志兵1，王俊超1,2 （1.四川广旺集团船景煤业有限责任公司，四川宜宾，645253；2.西安科技大学 能源学院 教育部西部矿井开采及灾害防治重点实验室，陕西西安 710054；） 摘 要：急倾斜煤层巷道支护大多采用单一的支护体系，巷道变形破坏严重为了找出适合急倾斜煤层巷道的支护体系，对急倾斜巷道围岩变形破坏特征进行了深入的分析以赵家坝煤矿3964运输平巷作为研究，借助岩石点荷载试验、围岩松动圈测试和数值模拟软件，对该巷道围岩力学性质、围岩松动范围、应力分布、变形情况分别进行研究，急倾斜煤层巷道围岩变形破坏机理，为控制急倾斜煤层巷道稳定性提供。急倾斜煤层点荷载试验松动圈测试oadway Surrounding Rock Deformation And Failure mechanism and supporting research in the Steeply inclined seam Wei Zhi— Bing1,Wang Jun—chao1, 2 (1.Sichuan Guang-wang Chuan-jing coal Limited Liability Company, sichuan yibin 645253；2.Xian University of Science and Technology Key Western China Laboratory of Mining and Disaster Control for Ministry of Education, Xi’an 710054 ) Abstract: Roadway deformation was deeply destruction as roadway support mostly was adopted a single supporting system in the Steeply inclined seam. In order to find out the suitable supporting system for steeply inclined seam, roadway surrounding rock deformation and failure characteristics was deeply analyzed in the Steeply inclined seam. Take Zhao Xiangjiaba3964 coal haulage drift as the object of study，roadway surrounding rock loose range, mechanical property, stress distribution, deformation were studied With the help of point load test of rock, rock loose circle test and numerical simulation software，to obtain roadway surrounding rock deformation and destruction mechanism in the steeply inclined seam，And Engineering practice had achieved very good results. So it provides a theoretical basis on the control of steeply inclined seam roadway stability. Key words: Steeply inclined seam；point load test of rock；rock loose circle test；numerical simulation；Surrounding rock deformation and destruction mechanism 我国急倾斜煤层占15%～20% 的储量，其年产量占全国煤炭总产量的10%左右。近年来，随着国家经济发展对煤炭资源需求的快速增长，急倾斜煤层在我国煤矿开采中所占的比重将逐年增加。大量研究与实践表明[1-5]，急倾斜煤层开采所造成的围岩变形破坏较一般条件下煤层不同，其围岩结构也具有特殊特征，由于缺乏对其围岩变形破坏机理等基本科学问题的系统研究，造成了开采方法选择失误工作面灾害事故频发。因此，研究急倾斜煤层开采的基本科学问题，可以为该类煤层开采关键技术的解决奠定理论基础，减少安全生产事故，大幅度地提高能源的利用效率。 1 围岩力学性质测试 试验段巷道围岩强度较低，且节理发育，极易破碎