文献类型：期刊文献

中文题名：采动巷道非对称变形机制及卸支一体化全空间支护技术

英文题名：Asymmetric deformation mechanism of mining roadways and unloading and supporting integrated full-space support technology

作者：周波 周泽 徐佑林 李鹏 张传玖 李鹏 李宣良

第一作者：周波

机构：[1]贵州理工学院矿业工程学院,贵州贵阳550003;[2]国能神东煤炭集团有限责任公司神东煤炭技术研究院,陕西榆林719315

第一机构：贵州理工学院矿业工程学院

年份：2025

卷号：56

期号：10

起止页码：146-157

中文期刊名：煤矿安全

外文期刊名：Safety in Coal Mines

收录：;北大核心:【北大核心2023】；

基金：贵州省科技支撑计划资助项目(黔科合支撑[2021]一般347)。

语种：中文

中文关键词：采动应力;巷道支护;非对称变形;围岩协同控制技术;全空间支护

外文关键词：mining stress;roadway support;asymmetric deformation;coordinated control technology for surrounding rock;full space support

摘要：针对深部近距离煤层采动巷道非对称变形等问题,以某煤矿1640轨道运输巷及1620轨道运输巷近距离煤层动压巷道为工程背景,采用现场调研、理论推导和数值模拟等方法,分析了巷道非对称变形破坏原因,发现采动应力场对巷道局部应力场的阶段性具有滞后性影响,导致巷道处于不平衡的(极)高应力场范围内,是巷道非对称变形破坏的根本原因。基于应力控制原理提出了卸支一体化全空间支护技术理念,通过深孔爆破的方式,将巷道两帮形成的集中应力充分释放,以改善巷道围岩应力环境;同时利用全断面钢管混凝土支架对巷道围岩进行全断面支护,以帮助围岩自稳;采用锚注工艺对巷道深部围岩进行加固,调动巷道深部围岩自承能力,从而形成“内外”2个承载结构;2个承载结构相互配合,共同承担巷道围岩的压力,提高巷道的稳定性和承载能力。井下工业性试验结果表明:对近距离煤层动压巷道实施卸支一体化全空间支护技术,充分发挥巷道围岩自承能力,采动巷道围岩变形量显著降低,底板最大变形量降低了75.83%,两帮最大移近量降低了80%;采动巷道能够在工作面推进期间保持长期稳定,证明卸支一体化全空间支护技术可以有效控制近距离煤层采动巷道的非对称变形。
Aiming at the problems such as asymmetric deformation of deep close distance coal seams mining roadway,taking the close distance coal seam dynamic pressure roadways of 1640 and 1620 railway transportation lanes in a coal mine as the engineering background,field investigations,theoretical derivations and numerical simulations were carried out.The causes of the asymmetric deformation and failure of the roadways were analyzed.It was found that the mining stress field has a delayed influence on the local stress field of the roadways,resulting in the roadways being in an unbalanced(extremely)high stress field range.This is the fundamental cause of the asymmetric deformation and failure of the roadways.Based on the principle of stress control,the concept of integrated support technology for unloading and anchoring in the full space was proposed.Through deep-hole blasting,the concentrated stress formed at the two sides of the roadway was fully released to improve the stress environment of the roadway surrounding rock;at the same time,the full-section steel-concrete pipe support was used to provide full-section support for the roadway surrounding rock,in order to help the surrounding rock achieve self-stabilization.The anchoring and grouting technology is adopted to reinforce the deep part of the roadway surrounding rock,mobilizing the self-bearing capacity of the deep part of the roadway surrounding rock,thereby forming two bearing structures,“inside and outside”;these two bearing structures cooperate with each other to jointly bear the pressure of the roadway surrounding rock,thereby improving the stability and bearing capacity of the roadway.The results of the underground industrial test show that by implementing the integrated full-space support technology for the dynamic pressure roadway in close-distance coal seams,the self-bearing capacity of the roadway surrounding rock is fully utilized.The deformation of the roadway surrounding rock due to mining activities is significantly reduced.The maximum deformation of the floor is decreased by 75.83%,and the maximum displacement of the two sides is reduced by 80%.The mining roadway can maintain longterm stability during the advancement of the working face,proving that the integrated full-space support technology can effectively control the asymmetric deformation of the mining roadway in close-distance coal seams.