无底柱分段崩落法开采顶板围岩崩落机理  

Mechanism of capping rock collapse by no-pillar sublevel caving

作　　者：杜翠凤[1] 杜建华[1] 郭廖武[2] 唐国友[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]武汉钢铁集团矿业有限责任公司,武汉430080

出　　处：《北京科技大学学报》2009年第6期667-673,共7页Journal of University of Science and Technology Beijing

基　　金：国家“十一五”科技支撑重大计划资助项目(No.2006BAB02A02)

摘　　要：以武钢程潮铁矿西区开采为工程背景,采用现场钻孔监测与相似材料模型实验相结合的方法,对无底柱分段崩落法开采过程中顶板围岩的变形和崩落规律进行了系统研究.首先,结合矿体赋存条件、地层结构和开采进程,设计两个钻孔实时监测顶板围岩的崩落规律.其次,以模型相似理论为基础,确定了所要研究模型的剖面和几何尺寸,设计制作模型,采用百分表、压力传感器和近景摄影测量等手段监测模型的应力、应变和破坏特征,并对百分表数据、应力盒数据、围岩位移和围岩破坏裂纹进行系统分析.研究成果初步揭示了金属矿山无底柱分段崩落法开采过程中,顶板围岩崩落机理和地表沉陷的基本规律.Chengchao Iron Mine of Wuhan Iron and Steel Corporation was taken as the engineering background. Drilling monitor and similar material model test were used to study the regular and mechanism of capping rock collapse during orebody caving. Firstly, based on the condition of orebody occurrence, strata＇s structure and mining process, two drill-holes were designed to monitor the pro- tess of capping rock collapse. Secondly, based on the similar model theory, according to sections and geometry sizes a similar material model was built to study the characters of strain, displacement and deformation through the data collection methods of pressure cells, percent meters and photogrammetry. The collusions reveal the elementary mechanism of capping rock collapse and the rules of ground subsidence during the caving process by non-pillar sublevel caving.

关 键 词：围岩 崩落开采法 无底柱分段崩落法 钻孔监测 

分 类 号：TD325[矿业工程—矿井建设]