矸石充填巷采等价采高模型探讨  

Discussion about Gangue Filling Roadway Mining Equivalent Mining Height Model

作　　者：马占国[1] 范金泉[1] 朱发浩[1] 孙凯[1] 兰天[1] 

机构地区：[1]中国矿业大学(徐州)深部岩土力学与地下工程国家重点实验室力学与建筑工程学院,江苏徐州221008

出　　处：《煤》2010年第8期1-6,共6页Coal

基　　金：国家重点基础研究发展规划(973)项目(2007CB209400);国家自然科学基金资助项目(50834005;50834004);教育部新世纪优秀人才支持计划项目(NCET-08-0837);江苏省自然科学基金(BK2009092);"青蓝工程"优秀青年骨干教师计划;国土资源部公益性项目(200811050)

摘　　要：巷采矸石充填是"三下"压煤和边角煤开采的一项新兴技术,也是绿色开采技术中的内容之一。为了创建巷采矸石充填开采围岩变形预计模型,利用F lac软件对矸石充填开采采场覆岩和巷道围岩的应力、变形分布规律进行了研究,对等价采高模型应用于巷采矸石充填开采围岩变形预计效果进行初步对比分析。研究表明:巷采全充填模型与等价采高模型具有规律上的相似性;二者之间的顶板竖向沉降趋势基本一致,模型顶部最大位移处位移相差2.125%,且都为盆地式沉降;最大垂直应力相差1.7 MPa;等价采高模型计算的底鼓最大值为335.9 mm,两者相差35.9 mm。计算分析结果与现场观测规律基本一致。The roadway mining with gangue backfilling technology using gangue to replace coal buried under buildings,railways,water bodies and boundary coal is very important in green mining.This technology is very new and developed.In order to create the expected deformation of surrounding rock model about roadway mining with gangue backfilling technology,we do some research on overlying strata movement behavior,the rock stress of the roadway surrounding and distribution of deformation by using of Flac2D software.We analysis the expected result about the equivalent model using on the roadway mining with gangue backfilling preliminary.The results indicates that this two models are similar in law;the trend between the two models＇ vertical displacement is the same basically.The maximum displacement＇s differences between the top of the two models lead to 2.125 percents.They are both the basin-type subsidence;The differences between the maximum vertical stress is 1.7 MPa.The maximum displacement of the equivalent mining height model＇s bottom heave is 335.9mm,their quantitative difference is 35.9mm.The calculation results are basically consistent with observation rule.

关 键 词：矸石充填 巷采 等价采高模型 应力 变形 

分 类 号：TD823.7[矿业工程—煤矿开采]