孤岛工作面窄煤柱沿空掘巷围岩变形控制  

Control of surrounding rock deformation for gob-side entry driving in narrow coal pillar of island coalface

作　　者：张炜[1] 张东升[2,3] 陈建本[4] 许猛堂[3] 

机构地区：[1]中国矿业大学物联网(感知矿山)研究中心,江苏徐州221116 [2]新疆大学地质与矿业工程学院,新疆乌鲁木齐830046 [3]中国矿业大学矿业工程学院,江苏徐州221116 [4]淮南矿业集团,安徽淮南232000

出　　处：《中国矿业大学学报》2014年第1期36-42,55,共8页Journal of China University of Mining & Technology

基　　金：中央高校基本科研业务费专项资金项目(2013QNB24);国家自然科学基金项目(51264035);中国矿业大学第五批"启航计划"项目([2012]5);江苏省博士后科研资助计划项目(1302050B)

摘　　要：基于淮南矿区某矿17238孤岛工作面回风平巷具体地质条件,采用FLAC3D数值模拟软件对孤岛面沿空掘巷超前支承压力分布特征进行了分析.结果表明:孤岛工作面沿空掘巷的超前支承压力最大峰值明显大于常规工作面沿空掘巷,应力集中系数是常规工作面沿空掘巷的1.84倍.为研究沿空掘巷顶板"小结构"的稳定性,构建了孤岛面窄煤柱沿空掘巷围岩结构力学模型,揭示了孤岛面窄煤柱沿空掘巷围岩控制机理,提出了具有针对性的围岩变形控制对策.现场工程实践应用表明:巷道采用重新优化设计后的支护方案效果较好,巷道两帮及顶底板相对变形量与优化前相比分别减少约55%及50%,孤岛面窄煤柱沿空掘巷围岩变形得到有效控制.Based on the on-site geological conditions of tailgate at 17238 island coalface in Hua- inan mining area, advance abutment pressure distribution characteristics of gob-side entry driv- ing was analyzed by numerical simulation software FLAC3D. Analysis results indicate that the maximum advance abutment pressure of gob-side entry driving of the island coalface is bigger than gob-side entry driving of a regular coalface, and the stress concentration factor is 1.84 times of the regular coalface. In order to study the small structure stability of gob-side entry driving roof, the mechanical model of surrounding rock structures for gob-side entry driving in narrow coal pillar of island coalface was built, the control mechanism was revealed and the con- trol measures were proposed as well. Field demonstration shows that the supporting perform- ance of the optimized supporting schemes is better, and the relative deformations of two ribs and roof-floor of roadway decreased by 55% and 50% respectively, and the surrounding rock deformation of gob-side entry driving in narrow coal pillar of island coalface was effectively con- trolled.

关 键 词：孤岛工作面 窄煤柱 沿空掘巷 围岩控制 

分 类 号：TD353[矿业工程—矿井建设]