煤层倾角对综放沿空留巷支护体稳定性影响研究  

Study on Influence of Coal Seam Dip Angle on Stability of Gob-side Entry Retaining Support in Fully Mechanized Top-coal Caving Face

作　　者：房耀洲[1] 刘秋菊[1] 刘峰 FANG Yao-zhou;LIU Qiu-ju;LIU Feng(Institute of Resource Development,Pingdingshan Polytechnic College,Pingdingshan 467001,China;Henan Pingzhi High Voltage Switch Co.,Ltd.,Pingdingshan 467000,China)

机构地区：[1]平顶山工业职业技术学院资源开发学院,河南平顶山467001 [2]河南平芝高压开关有限公司,河南平顶山467000

出　　处：《煤炭技术》2021年第10期52-55,共4页Coal Technology

摘　　要：为分析煤层倾角对综放沿空留巷支护体稳定性的影响,以8102工作面为工程背景,建立综放沿空留巷围岩结构与支护体相互作用的力学模型,得到与煤层倾角有关的支护体阻力计算公式,数值模拟不同倾角下巷旁支护体变形失稳的特征及围岩稳定性变化。研究结果表明:巷旁所需的支护阻力随着煤层倾角的增大而增大,沿空留巷顶板垂直位移变化量相对于底鼓量较小,底板受煤层倾角的影响更加严重。In order to analyze the influence of coal seam dip angle on the stability of gob-side entry retaining body in fully mechanized top coal caving face, taking 8102 working face as the engineering background, the mechanical model of interaction between surrounding rock structure and retaining body of gob-side entry retaining body in fully mechanized top coal caving face is established, the calculation formula of retaining body resistance related to coal seam dip angle is obtained, and the deformation and instability characteristics of roadside support body and the change of surrounding rock stability under different dip angles are numerically simulated. The research results show that: with the increase of working face dip angle, the stress concentration position of filling support body will gradually transfer from the deep part of support body to the junction of support body close to the floor of the next working face, the area of support body molding area will gradually increase, the stability will become worse, and the support effect will become worse, resulting in serious deformation and damage of gob side entry retaining roadway.

关 键 词：综合放顶煤开采 沿空留巷 充填支护体 煤层倾角 

分 类 号：TD323[矿业工程—矿井建设]