沿空留巷坚硬顶板关键块稳定性研究  

Stability Study on Hard Roof Key Block of Gob Side Entry Retaining

作　　者：张晋通 张东峰[1] 

机构地区：[1]太原理工大学矿业工程学院,山西太原030024

出　　处：《煤矿安全》2015年第11期50-53,共4页Safety in Coal Mines

摘　　要：为了减小沿空留巷巷道的变形量,确定巷旁充填体支护阻力大小,通过理论计算确定关键块的长度和沿空留巷时支柱所需的切顶阻力。采用数值模拟软件建立关键块顶板的力学模型,分析巷道围岩变形及应力分布特征,分析应力变化与关键块断裂存在的关系。结果表明:根据煤矿的坚硬顶板条件以及大结构中关键块的断裂位置及特征,选择0.6 MPa的支护切顶阻力在控制巷道变形量方面效果明显。In order to reduce the roadway deformation of gob-side entry retaining and determine the size of the support resistance roadway-side back-filling,we utilize theoretical calculation to determine the length of key block and the roof-cut resistance of hydraulic prop,and establish the mechanical model of key block,analyze the surrounding rock deformation and the stress distribution,find out the relationship between fracture structure and key block by numerical simulation software. The results show that selecting 0. 6 MPa support resistance in controlling the deformation of roadway has a significant effect according to the location and the characteristics of hard roof conditions and key block in coal mines.

关 键 词：沿空留巷 顶板结构 关键块 巷旁支护 支护阻力 

分 类 号：TD322[矿业工程—矿井建设]