Failure mechanism and control technology of water spraying and gushing type roadway with coal-mudstone roof
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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.
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期刊类型引用(4)
1. 刘庭，支帅. 深部大断面巷道变形破坏特征及控制技术研究. 山东煤炭科技. 2024(05): 58-62 . 
百度学术
2. 解盘石，房嘉睿，胡博胜，张波，张希，段思宇. 采动下淋水软岩巷道围岩变形破坏特征. 工矿自动化. 2024(12): 27-35+92 . 本站查看
3. 赵维生，梁维，许猛堂，刘彬. 围岩吸水对泥质弱胶结岩石巷道稳定性的影响. 矿业研究与开发. 2020(07): 32-36 . 百度学术
4. 张津裕. 煤矿突水后巷道支护补强的设计与应用效果. 机械管理开发. 2020(07): 178-179+256 . 百度学术
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