嗣后充填多矿柱同时回采充填体侧向位移研究  

Lateral Displacement of Backfill Body in Multiple Pillars Extraction After Cut and Fill Mining

作　　者：张爱卿 李金云[1] 吴爱祥 王贻明[2] ZHANG Ai-qing;LI Jin-yun;WU Ai-xiang;WANG Yi-ming(College of Architectural Engineering,North China Institute of Aerospace Engineering,Langfang 065000,Hebei,China;Research Center of Paste Backfill and Mining,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北华航天工业学院建筑工程学院,河北廊坊065000 [2]北京科技大学膏体充填采矿技术研究中心,北京100083

出　　处：《矿冶工程》2022年第2期24-27,31,共5页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(51674012)。

摘　　要：以3个矿柱同时回采为例,运用FLAC^(3D)建立了有限元模型并进行分析,采用控制变量法研究了在不同的矿柱一次回采高度、矿柱跨度、矿房宽度和充填体强度条件下充填体侧向位移的变化规律。结果表明,3个矿柱同时回采时,充填体双侧侧向位移值大于单侧侧向位移值,充填体侧向位移最大值出现在回采矿柱高度中间位置,由靠近中央位置向两端逐渐减小;充填体最大侧向位移值随着矿柱跨度和一次回采高度增加不断增大,与矿房宽度和充填体强度呈负相关,充填体侧向位移的影响敏感程度由大到小顺序为:矿房宽度、矿柱跨度、一次回采高度及充填体强度。A finite element model was constructed using FLAC^(3D) and adopted to analyze the case of simultaneous extraction of three pillars.The variation law of lateral displacement of backfill bodies in the case of simultaneous extraction of three pillars under the condition of different extraction height,pillar width,room width and strength of backfill bodies was investigated by adopting control variate method.The result shows that when three pillars are extracted at the same time,the lateral displacement on the both sides of middle backfill body is larger than the lateral displacement on the outward side of other two backfill bodies on both sides.The maximum lateral displacement occurs when the pillar is extracted to the middle height,and increases with the increasing of pillar width and primary extraction height,but presents a negative correlation with the room width and the strength of backfill body.The following factors for the lateral displacement of backfill body are listed in descending order of influence: room width,pillar width,primary extraction height and strength of backfill body.

关 键 词：矿柱 有限元 嗣后充填 回采高度 侧向位移 矿柱跨度 充填体强度 

分 类 号：TD853[矿业工程—金属矿开采]