文献类型：期刊文献

中文题名：多构造软岩工作面冒顶治理工程实践

英文题名：Engineering Practice for Roof Caving Treatment in Multi-structure Soft Rock Face

作者：郑伟

第一作者：郑伟

机构：[1]贵州理工学院矿业工程学院

第一机构：贵州理工学院矿业工程学院

年份：2018

卷号：49

期号：8

起止页码：145-148

中文期刊名：煤矿安全

外文期刊名：Safety in Coal Mines

收录：CSTPCD;;北大核心:【北大核心2017】；

基金：贵州省自然科学基金资助项目(黔科合基础[2016]1068);贵州省教育厅青年科技人才成长资助项目(黔科合基础[2016]1068);国家安全生产监管总局重特大事故防治关键技术研究资助项目(guizhou-0003-2017AQ)

语种：中文

中文关键词：多构造软岩;回采工作面;高冒区;注浆支护;承载能力

外文关键词：multi-structure soft rock;mining face;top-coal caving region;grouting support;bearing capacity

摘要：为解决软岩回采工作面前方构造多容易冒顶的技术难题,以文家坝煤矿110603回采工作面为研究对象,采用现场调查及资料分析的研究手段,得出工作面发生冒顶主要原因:一是工作面前方出现大量断层构造导致煤体整体较为破碎,不易稳定;二是岩层主要是泥化程度较高的软岩,遇水膨胀,导致支架钻底,不能与顶板接触,其支撑阻力不能有效发挥;三是工作面2条煤巷在掘进期间的支护强度不够使得围岩的整体承载能力不能有效发挥;四是工作面推进速度慢,"三带"受影响高度也会相应增大,导致工作面围岩整体破坏速度加快。针对以上冒顶原因提出采用工作面超前注浆、煤壁注浆和架前高冒区注浆相结合的综合加固方法对煤岩体进行注浆加固,增强围岩的整体承载能力,然后对运回两巷现有支护进行局部锚索补强支护能保证工作面安全开采。
In order to solve the technical problem of easy roof caving due to the multi-structure in front of soft rock mining face,taking 110603 working face in Wenjiaba Coal Mine as the research object, using the method of field investigation and data analysis, the main reasons of roof caving in working face are obtained. First, the overall fragmentation of coal is caused by a large number of fault structures and it is not stable. Second, the rock formation is mainly soft clay with a high degree of muddy clay.When the rock is swollen with water, it causes the bottom of the support to be drilled and cannot contact with the roof. The support resistance would not be effectively utilized. Third, the two supporting surfaces of the working face are not strong enough during the excavation so that the overall carrying capacity of the surrounding rock cannot be effectively utilized. Fourth, the advance of working face is slow, and the affected height of＂three belts ＂also increases correspondingly, resulting in the overall destruction of surrounding rock in working face being accelerated. In this paper, according to the reasons of the above-mentioned roof collapse, the comprehensive reinforcement method of the advanced grouting of working face, grouting of coal wall and grouting in front of top-coal caving region zone, is used to grout and consolidate the coal-rock mass to enhance the overall carrying capacity of surrounding rock. Then, carry out the local anchor rope reinforcement support for the existing support of the two lanes can guarantee the safe mining of working face.