厚松散层下采高对地表动态沉降特征的影响  

Impact of mining thickness on dynamic subsidence characteristics in condition of mining under thick unconsolidated layers

作　　者：侯得峰 李德海[2] 许国胜[2] 张彦宾[2] Hou Defeng Li Dehai Xu Guosheng Zhang Yanbin(College of Resources ＆ Safety Engineering, China University of Mining ＆ Technology（Beijing） , Beijing 100083, China Institute of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China)

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]河南理工大学能源科学与工程学院,河南焦作454000

出　　处：《煤炭科学技术》2016年第12期191-196,共6页Coal Science and Technology

基　　金：河南理工大学博士基金资助项目(B2014-056)

摘　　要：为了研究厚松散层下采高对地表动态沉陷的影响,以赵固矿区地表移动观测数据为基础,研究了厚松散层地质采矿条件下采高对地表下沉量、地表最大下沉速度、地表最大下沉速度滞后距以及不同阶段地表移动持续时间的影响。结果表明:在厚松散层条件下,随着采高的增加,地表下沉系数由0.67增大到0.74,增大了约11%;地表最大下沉速度由24.5 mm/d增大到51.1 mm/d,增大了109%;地表最大下沉速度滞后距由182 m缩减到94 m,缩短了约49%;地表移动的活跃期由206 d延长到252 d,延长了约23%,而衰退期持续时间由112 d缩短到62 d,缩短了约45%,由此得出在厚松散层下开采时,随着采高的增加地表显现出下沉系数增大、下沉速度加快、活跃期延长而衰退期缩短,地表残余变形减小并且稳定快等特征。In order to study the rule of mining thick impact on dynamic subsidence characteristics under the geological and mining conditions in thick unconsolidated layers, on the basis of the surface movement observation data of Zhaogu Coal Mine Area,the influence of mining thickness impact on characteristics of surface subsidence, the maximum ground sinking speed,the maximum ground subsidence velocity lag and the influence of duration of ground surface at different stages was analyzed respectively in condition of mining under thick unconsolidated layers. It was concluded that under the condition of thick loose bed,with the increase of mining thickness, surface subsidence coefficient increases from 0. 67 to 0. 74,increasing nearly 11%; Maximum subsidence velocity of surface increases from 24. 5mm/d to 51.1 mm/d , increased by 109% ; The lag distance of maximum subsidence velocity reduced from 182 m to 94 m, by almost 49% ; The surface movement of active extended from 206 days to 252 days,extended nearly 23%,while the recession duration reduced from 112 days to 62 days, shorten nearly 45%. The results show that under the condition of thick unconsolidated layers, with the increase of mining thickness, the surface subsidence coefficient increases, the sinking speed becomes fast, active duration extends, recession duration shortens, surface residual deformation becomes small and stability speeds fast and other characteristics.

关 键 词：厚松散层 采高 地表动态沉陷特征 最大下沉速度滞后距 地表残余变形 

分 类 号：TD325[矿业工程—矿井建设]