深部近距离煤层上行开采覆岩运动及应力分布试验研究  

Experimental study on overlying strata movement and stress dis-tribution during ascending mining in deep closer coal seam

作　　者：张向阳[1] 涂敏[1] 窦怡川 

机构地区：[1]安徽理工大学能源与安全学院,煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001

出　　处：《中国安全生产科学技术》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)

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 .

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 

分 类 号：X936[环境科学与工程—安全科学]