摘要
为研究深部近距离煤层群下向卸压开采高应力演化的特征,根据潘二煤矿深部近距离煤层群8煤和6煤地质与开采技术条件,设计了下向卸压开采的二维相似材料模拟试验模型,对8煤和6煤开采引起的采动应力进行监测。系统分析了8煤下向开采与6煤开采后的采场围岩采动应力、岩层运移及不规则煤柱对采动应力演化的影响,获得了近距离煤层群8煤下向卸压开采的顶底板采动高应力演化特征及6煤回采期间覆岩运移、采动应力裂隙演化和来压特征,得出了下向卸压开采不规则煤柱对采动应力、裂隙分布的影响规律。研究不仅为以采动高应力演化为主导作用的煤岩动力灾害防治提供了理论基础,也为卸压开采采场参数设计与优化提供了技术支撑。
According to the geological and mining technical conditions of the seams No.8 and No.6 of closed coal seams group in Paner deep coal mine, the 2D similar material simulation model of seams No.8 and No.6 is designed by using relieving mining method from up to down to study high stress evolution. Based on mining-induced stress monitoring by using pressure sensor, disturbance stress and strata migration after seams No.8 and No.6 mined; and the impact of irregular pillar on stress evolution are systematically analyzed; then the high stress evolution characteristics in roof and floor of seam No.8 and strata movement, mining-induced stress, mining-induced fissure, weighing characteristic of seam No.6 are were obtained; and the development patterns of mining-induced stress and mining-induced fissure influenced by irregular pillar are obtained. Research results not only provide a theoretical basis for mining power disaster prevention with mining-induced abutment stress evolution as its leading factor, but also provide technical support for the design and optimization of parameters of longwall mining by using relieving mining method.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2013年第9期2551-2556,共6页
Rock and Soil Mechanics
基金
国家重点基础研究发展计划(973)项目(No.2010CB226806)
教育部出国留学基金(第43批)
中国博士后基金(No.2012M521211)
关键词
近距离煤层群
卸压开采
采动应力演化
不规则矿柱
相似模拟试验
multi-closed coal seams
relieving mining
mining-induced stress development
irregular pillar
material simulationexperiment
