急倾特厚煤层巷道合理拱轴线解析方法  

Analytical Method of Reasonable Arch Axis of Roadway in Steep Dip Extremely Thick Seam

作　　者：辛德林 郭玉龙 孙喜贵 胡腾飞 王昭舜 刘皓鑫 XIN Delin;GUO Yulong;SUN Xigui;HU Tengfei;WANG Zhaoshun;LIU Haoxin(CCTEG Wuhan Engineering Company,Wuhan 430064,China;CCRI Tong'an(Beijing)Intelligent Control Technology Co.,Ltd.,Beijing 100013,China;Mine Intelligent Ventilation Division,China Coal Research Institute,Beijing 100013,China;Beijing Engineering and Technology Research Center of Coal Mine Safety,Beijing 100013,China)

机构地区：[1]中煤科工集团武汉设计研究院有限公司,武汉430064 [2]煤科通安(北京)智控科技有限公司,北京100013 [3]煤炭科学技术研究院有限公司矿山智能通风事业部,北京100013 [4]北京市煤矿安全工程技术研究中心,北京100013

出　　处：《煤炭技术》2024年第11期61-65,共5页Coal Technology

基　　金：中煤科工集团武汉设计研究院有限公司2022年科研项目基金(ZZYF202236);中煤科工集团武汉设计研究院有限公司2023年科研项目基金(ZZYF202320)。

摘　　要：为掌握急倾特厚煤层巷道的合理拱形结构,以王家山煤矿为工程背景,通过现场调查和力学分析,提出了巷道合理拱轴线解析计算方法,基于FLAC3D软件分析了合理拱形断面的效用机制。结果表明:陡(急)倾煤层巷道围岩变形整体均呈现显著非对称分布,巷道围岩内“承载拱”整体呈现“偏压”的非对称受力特征,简化为顶部受非均布荷载作用的三铰拱结构,可推出合理拱轴线解析计算方程;合理拱轴线线形受荷载分布、巷道拱高和跨度影响显著;急倾煤层中巷道采用合理拱形顶可诱导垂直应力向急倾煤层两侧的坚硬顶底板岩层转移,诱导水平向应力向巷道底部煤体中转移,达到提高巷道围岩稳定性和有效控制围岩变形的效果。In order to master the reasonable arch structure of laneway in steep and thick coal seam,based on the engineering background of Wangjiashan coal mine,through field investigation and mechanical analysis,the analytical calculation method of reasonable arch axis of laneway is proposed,and the utility mechanism of reasonable arch section is analyzed based on FLAC3D software.The results show that the deformation of surrounding rock in steep(steep)dipping coal seam shows significant asymmetric distribution as a whole,and the"bearing arch"in the surrounding rock shows asymmetric stress characteristics of"bias pressure"as a whole,which is simplified as a three-hinge arch structure under non-uniform load on the top,and the analytical calculation equation of reasonable arch axis can be derived.The reasonable arch axis alignment is significantly affected by load distribution,arch height and span of roadway.The adoption of reasonable arch roof in the roadway of steep coal seam can induce the vertical stress to transfer to the hard roof and floor rock layers on both sides of steep coal seam,and induce the horizontal stress to transfer to the coal body at the bottom of the roadway,so as to improve the stability of the roadway surrounding rock and effectively control the deformation of the surrounding rock.

关 键 词：急倾煤层 巷道 合理拱轴线 解析方法 

分 类 号：TD263[矿业工程—矿井建设] TD322