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| 迎回采面沿空掘巷围岩控制技术实践 | |
| 引用本文： | 李文峰,孙迎辉,杨波,闫帅,胡忠超. 迎回采面沿空掘巷围岩控制技术实践[J]. 煤炭工程, 2010, 0(2) |
| 作者姓名： | 李文峰 孙迎辉 杨波 闫帅 胡忠超 |
| 作者单位： | 1. 中国矿业大学,煤炭资源与安全开采国家重点实验室,江苏,徐州,221008 2. 河南煤矿安全监察局,豫北监察分局,河南,鹤壁,458000 3. 神华乌海能源有限责任公司,利民煤矿,内蒙古,鄂尔多斯,017000 |
| 摘 要： | 迎回采面沿空掘巷要全程经历毗邻区段回采后采空区侧向老顶断裂、回转、触矸的结构调整造成的动压影响,巷道变形较大。采用FLAC2D对巷道围岩垂直应力进行数值计算,发现其与沿稳定采空区边缘沿空掘巷垂直应力分布有显著差异,前者峰值点即弹塑性交界处离采空区距离更远。针对迎回采面沿空掘巷围岩变形特点,提出了围岩控制原理:合理选取煤柱宽度;采用高强度、大延伸率锚杆支护围岩;采用预应力对穿锚索、注浆加固窄煤柱。并且在利民煤矿进行了工程实践,取得了良好效果。 |
| 关 键 词： | 二次动压巷道 窄煤柱 高强锚杆 对穿锚索 |
Practices on surrounding rock control technology of gateway driving along goaf towards to coal mining face |
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| LI Wen-feng,SUN Ying-hui,YANG Bo,YAN Shuai,HU Zhong-chao. Practices on surrounding rock control technology of gateway driving along goaf towards to coal mining face[J]. Coal Engineering, 2010, 0(2) | |
| Authors: | LI Wen-feng SUN Ying-hui YANG Bo YAN Shuai HU Zhong-chao |
| Affiliation: | 1.State Key Lab of Coal Resources and Safety Mining/a>;China University of Mining and Technology/a>;Xuzhou 221008/a>;China/a>;2.Yubei Supervision Branch/a>;Henan Coal Mine Safety Supervision Bureau/a>;Hebi 458000/a>;3.Limim Mine/a>;Shenhua Wuhai Energy Company Limited/a>;Erdos 017000/a>;China |
| Abstract: | The gateway driving along the goaf towards to the coal mining face to be contiguous to other coal mining blocks was in the full procedure influenced by the dynamics occurred by the side main roof broken,rotary and touching coal reject structure adjusted in the goaf after coal mining.The gateway was high in deformation.The FLAC2D was applied to have a numerical calculation on the vertical stress of the surrounding rocks of the gateway.It was found that there was an obvious difference in the vertical stress d... |
| Keywords: | second dynamic gateway narrow coal pillar high strength bolt crossed anchor |
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