井底密集硐室群变形破坏分析与控制技术  

Deformation and failure of densely arranged pit bottom chambers and the control measures

作　　者：吴建星 WU Jian-xing(CCTEG Coal Mining Research Institute,Beijing 100013,China;Coal Mining Branch,China Coal Research Institute,Beijing 100013,China;National Key Lab of Coal Resources High Efficient Mining and Clean Utilization,China Coal Research Institute,Beijing 100013,China)

机构地区：[1]中煤科工开采研究院有限公司,北京100013 [2]煤炭科学研究总院开采研究分院,北京100013 [3]煤炭科学研究总院煤炭资源高效开采与洁净利用国家重点实验室,北京100013

出　　处：《煤炭工程》2022年第9期48-53,共6页Coal Engineering

摘　　要：为解决漳村煤矿井底车场硐室群大范围变形破坏的问题,采用数值模拟对井底车场硐室群应力分布及变形特征进行研究,研究结果表明:井底车场硐室群变形破坏的主控因素为岩性软弱和巷间的影响。由于岩性软弱,在硐室周边形成了1.5~2倍巷道跨度的塑性区,在巷间影响下,塑性区相互连接产生的大范围的塑性破坏区是井底车场硐室群变形破坏的根源。在此基础上提出了“低压浅孔、高压深孔全断面注浆”为核心的巷修方案;通过全长预应力注浆锚索的使用,在现场取得了良好的应用效果。In order to solve the problem of large scale deformation and failure of the underground chamber group in Zhangcun Coal Mine,the stress distribution and deformation characteristics of the chambers were studied by numerical simulation.The results show that the main controlling factors of deformation and failure are low rock strength and roadway interaction.Because of low rock strength,a plastic zone with a width of 1.5 to 2 times of the roadway is formed around the chamber.Under the influence of roadways,the large scale plastic damage area produced by the connection of plastic zones is the root of deformation and damage of the chamber group in the pit bottom.On this basis,a roadway repair scheme was proposed,applying full-length prestress grouting cables for low-pressure shallow hole and high-pressure deep hole full-section grouting,and favorable application result was achieved.

关 键 词：井底车场 密集硐室群 变形破坏 巷道修复 数值模拟 

分 类 号：TD354[矿业工程—矿井建设]