Overlying strata movement of recovering standing pillars with solid backfilling by physical simulation  

作　　者：An Baifu Miao Xiexing Zhang Jixiong Ju Feng Zhou Nan 

机构地区：[1]School of Mines,China University of Mining & Technology [2]State Key Laboratory of Geomechanics and Deep Underground Engineering,China University of Mining & Technology

出　　处：《International Journal of Mining Science and Technology》2016年第2期301-307,共7页矿业科学技术学报（英文版）

基　　金：provided by the National Natural Science Foundation of China(No.51074165);the NationalKey Basic Research Program of China(No.2013CB227905);the Qing-Lan Project of China Scholarship Council

摘　　要：To analyze the overlying strata movement law of recovering room mining standing pillars with solid backfilling.Physical simulation experiments with sponge and wood as the backfilling simulation material were tested.The results show that:(i) The covering-rock mechanics of the overly strata comes from "two-arch structures + hinged girder + bend beam" to "backfilling material + hinged girder + bent beam" by increasing the fill ratio from 0%to 85%,the beginning of overlying strata movement appears later and the total duration of subsidence velocity increased from zero to the highest value increases.The trend of "single polarization" of the subsidence velocity curves becomes noticeable and the velocity variation trend becomes stable,(ii) The equiponderate aeolian sand was added to improve the anti-pressure ability of the loess,and the corresponding ground processing & transportation system was designed.To analyze the overlying strata movement law of recovering room mining standing pillars with solid backfilling.Physical simulation experiments with sponge and wood as the backfilling simulation material were tested.The results show that：（i） The covering-rock mechanics of the overly strata comes from ＂two-arch structures ＋ hinged girder ＋ bend beam＂ to ＂backfilling material ＋ hinged girder ＋ bent beam＂ by increasing the fill ratio from 0%to 85%,the beginning of overlying strata movement appears later and the total duration of subsidence velocity increased from zero to the highest value increases.The trend of ＂single polarization＂ of the subsidence velocity curves becomes noticeable and the velocity variation trend becomes stable,（ii） The equiponderate aeolian sand was added to improve the anti-pressure ability of the loess,and the corresponding ground processing ＆ transportation system was designed.

关 键 词：Room mining standing pillars Solid backfilling Physical simulation experiment Overlying strata movement 

分 类 号：TD325[矿业工程—矿井建设]