浅埋深煤层开采顶板活动规律相似模拟试验研究  

Similar Simulation Study of Roof Movement Law over Shallow Coal Seam Mining

作　　者：魏中举[1] 余芳芳[1] 刘富奎[1] 高祥[1] 

机构地区：[1]六盘水师范学院矿业工程系,贵州六盘水553004

出　　处：《煤炭技术》2016年第12期43-44,共2页Coal Technology

基　　金：贵州省矿山压力与岩层控制工程中心项目(黔教合KY字[2012]027号);采矿工程省级特色重点学科(黔学位合字ZDXK[2015]9号);贵州省大学生创新创业训练计划项目(201510977007)

摘　　要：运用实验室二维相似材料模拟试验，通过对煤层模拟开采，得出浅埋深条件下顶板活动规律及覆岩运动特征。分析表明：随着直接顶的断裂和失稳，老顶形成“砌体梁”结构；老顶周期来压步距平均约10．94m；上覆岩层移动破坏后形成“三带”，垮落带范围为煤层上方4-6．3m。裂隙带最大发育高度为煤层上方19．8m；弯曲下沉带范围为裂隙带以上直至地表。Roof movement law and overlying strata movement characteristics over the shallow coal seam mining was researched, which adopted the similar material simulation experiment. According to the experimental results, along with the immediate roof fracture and instability, the main roof formed ＂voussoir beam＂ structure. The step distance of main roof cycle presses is approximately 10.94 m. Caving zone was 4-6.3 m,the maximum height of fissure zone was 19.8 re,bending subsidence zone is above fissure zone until the ground surface.

关 键 词：浅埋深 煤层开采 相似模拟 顶板活动 覆岩运动 

分 类 号：TD823.25[矿业工程—煤矿开采]