大倾角煤层开采覆岩空间倾斜砌体结构  

Incline masonry structure around the coal face of steeply dipping seam mining

作　　者：伍永平[1,2] 解盘石[1,2] 王红伟[1,2] 任世广[1,2] 

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]西安科技大学西部矿井开采及灾害防治教育部重点实验室,陕西西安710054

出　　处：《煤炭学报》2010年第8期1252-1256,共5页Journal of China Coal Society

基　　金：教育部新世纪优秀人才支持计划(CET-04-0972)

摘　　要：以大倾角煤层走向长壁采场为研究对象,采用相似材料模拟实验、数值模拟和理论分析综合方法,分析了采场顶板应力分布特征和变形破坏规律,认为大倾角煤层采场顶板破断后形成了倾斜砌体结构,该砌体结构以倾向堆砌和反倾向堆砌两种形式存在,且沿工作面走向和倾向均具有不同的分布特征,该结构的非均衡运动是导致"R-S-F"("顶板-支架-底板")系统失稳的主导影响因素,同时,该结构的运动形式亦受到上覆未垮岩层的变形破坏影响。倾斜砌体结构不仅是支护结构的施载体,也是"似壳结构"断裂失稳对工作面支护系统作用的传力媒介,对倾斜砌体结构的深入研究是探讨大倾角煤层采场"主承载结构"失稳致灾的关键。Based on the roof structure around the coal face in steeply dipping seam,the theoretical analysis,physical simulation experiments and numerical simulation were used to analyze the stress distribution and movement of the roof.According to the conclusion,the incline masonry structure was formed after the roof failure,of which the dip direction pile and anti-dip direction types were made,and different distribution of the structure was concluded around the coal face,the nondirective movement was found when the coal face is moving forward,which is also the main reason of the instability of＂R-S-F＂system.At the same time,the behavior of incline masonry structure is affected by the upper strata structure which can be defined as the key load-bearing structure,therefore,the incline masonry structure is not only loader of the support,but also load medium between the support and the key load-bearing structure.At last,the study of the incline masonry structure is the key point to discuss mechanism of the key load-bearing structure failure and catastrophe.

关 键 词：大倾角煤层 倾向堆砌 反倾向堆砌 “R-S-F”系统失稳 主承载结构 

分 类 号：TD823.21[矿业工程—煤矿开采]