摘要
为深入研究深部近距离煤层上行开采过程中岩层应力分布、断裂破坏及下沉变形特征,根据深部煤层开采的具体工程地质条件,建立了深部近距离煤层上行开采相似材料试验模型,对上行开采中围岩应力变化、覆岩运动及裂隙演化过程进行了模拟分析。获得了下煤层和上煤层开采过程中,围岩应力分布变化特点及分区特征、岩层裂隙富集区主要分布区域及其演化规律,煤层开采过程中切眼和煤壁附近岩层断裂角的变化特征,并得到了两煤层工作面相对位置不同情况下,岩层裂隙富集区演化特点、断裂角变化及下沉变形规律。研究成果为类似条件下煤层上行开采、瓦斯抽采提供参考。
In order to research the rock stress distribution , fracture failure and settlement deformation characteris-tics during ascending mining in deep closer coal seam , according to the special engineering geologic conditions of deep coal seam mining , a similar material test model of deep closer coal seam by using ascending mining method was designed .The processes of surrounding rock stress variation , over-lying strata movement and crack evolution were analyzed .The characteristics of rock stress distribution variation and area division , the main distribution area and evolution rules of rock fissure cluster area , and the variation characteristics of cutting hole and rock breaking angle near to the coal wall during the lower and upper coal seam mining processes were obtained .Then the evolu-tion characteristics of rock fissure cluster area and the rules of breaking angle variation and settlement deformation under the con-dition of different mining distances in two coal seams were acquired .It can provide the references for the ascending mining and gas drainage in the similar coal seam .
出处
《中国安全生产科学技术》
CAS
CSCD
北大核心
2015年第5期18-25,共8页
Journal of Safety Science and Technology
基金
国家自然科学基金项目(51204006,51374011,51474005,51474006)
安徽省高等学校省级自然科学研究项目(KJ2013A098)
关键词
深部近距离煤层
上行开采
围岩应力
变形破坏
裂隙演化
相似模拟
deep closer coal seam
ascending mining
surrounding rock stress
deformation and failure
fissure e-volution
physical simulation analysis
