采矿与安全工程学报2017，Vol.34Issue(5)：852-860,9.DOI:10.13545/j.cnki.jmse.2017.05.005
高位硬厚岩层采动覆岩结构演化特征及致灾规律
Mining-induced overlying strata structure evolution characteristics and disaster-triggering under high level hard thick strata
摘要
Abstract
Based ongeological conditions with high level hard thick strata over the working face, two similar models, one monolayer and one double-layers of magmatic rock, are built. The overlying strata structure and its evolution characteristics are studied by using the similar simulation experiments. Through analytical analysis, the breaking pattern and the formation mechanism of overlying strata structure are revealed. The mining-induced disaster-triggering of typical overlying strata structure are analyzed and verified by engineering case studies. The results show that the structures of overlying stra-ta before the first breaking and in the process of periodic breaking of monolayer of hard thick stratum are Ladder-shape andΓ-shape, respectively; Under the condition of double-layers of magmatic rock, the strata structures before the breaking of lower hard thick strata is Ladder-shape, the structures of overlying strata before and after the breaking of upper hard thick strata are Ladder-Γ compound shape and F-shape; The rupture angleαof working face overlying strata is between 45° and 90° and there is always a certain angle between breaking traces and rock layers. The high stress concentration and ener-gy accumulation occurs under the condition of high level hard thick strata, which can easily induce stat-ic loading dynamic disasters. The instability of Ladder-shape overlying structure can induce dynamic disasters, water inrush and gas outburst; the instability ofΓ-shape overlying structure can also easily induce dynamic disasters but on water inrush and gas outburst in associated with.关键词
高位硬厚岩层/相似模拟试验/采动覆岩结构/破断机制/致灾规律Key words
high level hard thick strata/physical similar simulation experiment/mining-induced structure of overlying strata/breaking mechanism/disaster-triggering law分类
矿业与冶金引用本文复制引用
张培鹏,蒋力帅,刘绪峰,张贞良,刘旭..高位硬厚岩层采动覆岩结构演化特征及致灾规律[J].采矿与安全工程学报,2017,34(5):852-860,9.基金项目
国家自然科学基金项目(51374139,51704185) （51374139,51704185）
山东省自然科学基金项目(ZR2013EEM018,ZR2017BEE045) （ZR2013EEM018,ZR2017BEE045）
山东省高等学校科技计划项目(J17KA218) （J17KA218）
山东科技大学人才引进科研启动基金项目(2016RCJJ034) （2016RCJJ034）
