淋涌水型煤泥岩顶板巷道破坏机制与控制技术
Failure mechanism and control technology of water spraying and gushing type roadway with coal-mudstone roof
【索引】赵云佩,贾靖.淋涌水型煤泥岩顶板巷道破坏机制与控制技术[J].工矿千亿国际app下载,2019,45(4):24-29.
【Reference】ZHAO Yunpei,JIA Jing.Failure mechanism and control technology of water spraying and gushing type roadway with coal-mudstone roof[J].Industry and Mine Automation,2019,45(4):24-29.
【DOI】10.13272/j.issn.1671-251x.17379
【作者】赵云佩1,贾靖2
【Author】 ZHAO Yunpei1,JIA Jing2
【作者机构】1.冀中能源邢台矿业集团有限责任公司, 河北 邢台054000;2.冀中能源河北煤炭科学研究院, 河北 邢台054000
【Unit】1.Jizhong Energy Xingtai Mining Group Co., Ltd., Xingtai 054000, China;2.Jizhong Energy Hebei Coal Science Research Institute, Xingtai 054000, China
【摘要】针对华亿五一煤业淋涌水型煤泥岩顶板巷道变形破坏问题,以该煤矿11101工作面运输巷为例,采用现场观测与室内试验方法,对巷道破坏特征及机制展开了研究。结果表明:11101工作面运输巷煤泥岩顶板下沉变形显著,最大下沉量达700 mm,锚杆索和工字钢支架损坏现象严重;顶板泥岩含有大量高岭石和蒙脱石成分,遇水易发生泥化、软化和膨胀变形;巷道破坏失稳是围岩强度低、泥岩遇水易泥化、未采取防水措施、支护方式不合理等因素综合作用的结果。提出了顶板全锚索支护+防水型锚固剂+泄水孔排水的淋涌水型煤泥岩顶板巷道破坏控制措施,并应用于11101工作面回风巷。实践表明,回风巷掘出约30 d后,巷道变形趋于平稳,顶板最大下沉量约为112 mm,巷道断面满足生产需求。
【Abstract】For deformation and failure problem of water spraying and gushing type roadway with coal-mudstone roof in Huayi Wuyi Coal Mine, taking haulage rodeway of 11101 working face in the coal mine as an example, roadway failure characteristics and mechanism was researched by use of field observation and indoor test. The results show that coal-mudstone roof of the haulage rodeway has evident deformation with the maximum subsidence of 700 mm, and bolts, anchors and I-steel supports are damaged seriously. Roof mudstone contains large amounts of kaolinite and montmorillonite, which cause argillization, softening and swelling deformation of the mudstone in contact with water. Failure and instability of the haulage gateway are a result of the combined action of low-strength of surrounding rock, argillization of mudstone in contact with water, lack of waterproof measures and unreasonable support modes. Failure control measures of water spraying and gushing type roadway with coal-mudstone roof were proposed including whole anchors support of roof, waterproof type anchoring agent and drainage through outlet entrances. The control measures have been applied in return airway of 11101 working face. The practice shows that deformation tends to stabilize after tunneling of the return airway is finished 30 days, the maximum subsidence of roof is about 112 mm, and section of the return airway satisfies production requirements.
【关键词】 煤泥岩顶板巷道; 淋涌水型巷道; 运输巷; 回风巷; 围岩控制; 巷道破坏失稳; 顶板下沉; 全锚索支护
【Keywords】roadway with coal-mudstone roof; water spraying and gushing type roadway; haulage rodeway; return airway; surrounding rock control; failure and instability of roadway; roof subsidence; whole anchor support
【文献出处】工矿千亿国际app下载,2019年4期
【基金】
【分类号】TD353
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