摘要
以盈盛煤业9~#煤层坚硬顶板为研究背景,进行现场岩芯取样,对符合规范要求的岩样进行统计、计算处理,对岩芯RQD指标值进行工程分级。根据测试结果可知,9~#煤层顶板主要以砂岩和泥岩层分布为主,为典型的坚硬顶板,在进行水力压裂强度放顶设计时,确定RQD在50%以上段为分割水力压裂段,为盈盛煤矿坚硬顶板水力压裂强制放顶技术提供重要的实验依据。
Taking the hard roof of No.9 coal seam of Yingsheng coal industry as the research background,conducts on-site core sampling,conducts statistics and calculation on the rock samples that meet the specification requirements,and carries out engineering classification on the RQD index value of the core.According to the test results,the roof of No.9 coal seam is mainly distributed in sandstone and mudstone layers,which is a typical hard roof.In the design of hydraulic fracturing strength caving,the section with RQD above 50%is determined to be the split hydraulic fracturing section,which provides an important experimental basis for the forced caving technology of hydraulic fracturing of hard roof in Yingsheng coal mine.
作者
周波
郑伟
牛军平
韩威海
张辉
ZHOU Bo;ZHENG Wei;NIU Jun-ping;HAN Wei-hai;ZHANG Hui(Xiangqiao Coal Mine,Shiqiao Town,Panxian County,Guizhou Wantian Coal Industry Group Co.,Ltd.,Panxian 553503,China;Institute of Mining Engineering,Guizhou Institute of Technology,Guiyang 550003,China;Zezhou Tian′an Yingsheng Coal Industry Co.,Ltd.,Shanxi Jinmei Group,Jincheng 048019,China;School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China)
出处
《煤炭技术》
CAS
北大核心
2021年第7期60-62,共3页
Coal Technology
基金
国家自然科学基金资助项目(51874109)
贵州省优秀青年科技人才培养计划(黔科合平台人才[2019]5674)。
关键词
RQD
工程分级
坚硬顶板
RQD
engineering classification
hard roof
