采矿与安全工程学报2017，Vol.34Issue(2)：287-294,8.DOI:10.13545/j.cnki.jmse.2017.02.013
大倾角煤层开采"关键域"岩体结构稳定性分析
Analysis of rock structure stability in mining at the critical zone of the steeply dipping seam
摘要
Abstract
With the long-wall stope of steeply dipping seam as the research subject, the overlying strata movement and distribution characteristics of rock stress field have been analyzed, and the conversion characteristic of the critical zone in the surrounding rocks have been revealed. And research indicates that the critical zone is playing a decisive role in overlying strata movement in the asymmetry region of arch shell formed when overburden rock mass fall in mining the steeply dipping seam. In tendency, the critical zone would shift towards different strata, and the scalar structure in tendency direction is formed by the interaction with key rocks. By analyzing the forming characteristics of the scalar structure, the mechanical model is established and the stress feature of rock beam in different critical zones is ob-tained. The shearing and tensile failure mechanism of rock structure is revealed and the spatial instabil-ity mode of overlying arch shell caused by instability of key rock in critical zone is determined, which provides theoretical foundations for safe and efficient mining of steeply dipping seam.关键词
大倾角煤层/关键域/倾向梯阶结构/破坏准则/失稳模式Key words
steeply dipping seam/critical zone/scalar structure in tendency of coal seam/failure principle/instability mode分类
矿业与冶金引用本文复制引用
王红伟,伍永平,解盘石,李延军..大倾角煤层开采"关键域"岩体结构稳定性分析[J].采矿与安全工程学报,2017,34(2):287-294,8.基金项目
国家自然科学基金重点项目(51634007) （51634007）
陕西省自然科学基础研究计划项目(2016JQ5019) （2016JQ5019）
陕西省教育厅专项科学研究计划项目(2016JK1491) （2016JK1491）
