特大采空区侧上方采矿地压安全综合研究  

Comprehensive Study on Underground Pressure of Mining Above the Side of Large Goaf

作　　者：徐刚[1,2] 胡静云[1,2] 李庶林[1,2] 

机构地区：[1]玉溪大红山矿业有限公司,云南玉溪市653100 [2]长沙矿山研究院有限责任公司,国家金属采矿工程技术研究中心,湖南长沙410012

出　　处：《矿业研究与开发》2016年第10期109-115,共7页Mining Research and Development

基　　金：国家科技支撑计划项目(2013BAB02B06)

摘　　要：大红山铁矿多个采用崩落法回采的特大采区逐步实现了大范围的贯通,针对贯通采区侧上方待回采矿体的安全生产难题,采用理论分析对采区贯通前后围岩中的次生应力集中规律进行了研究,采用钻孔探测与应力计对围岩中的崩落范围与应力重分布进行了监测,加上地表开裂沉降范围的实时动态监测,评估得到了采区贯通对侧上方待采矿体的影响范围与程度,通过理论分析与实测数据,提出了上覆岩层承压拱消失的观点,发现了大红山铁矿崩落法采矿整体进入应力释放与平稳期这一重要现象,这一结论对采空区侧上方待采矿体的地压安全十分有利。Several large stopes of Dahongshan iron mine by caving mining have gradually formed a wide range of cutthrough. According to the safety problems of mining above the side of goafs, theoretical analysis was carried out on the distribution law of induce stress in the surrounding rock before or after the goaf cut-through. Then, drilling exploration and stress detector were applied for monitoring the caving scope and stress redistribution in surrounding rock. Combining with the real-time dynamic monitoring on surface cracking and settlement range, the influence scope and degree of cut-through on the mining above the side of goafs were evaluated. Through theoretical analysis and experimental data, it found that the bearing arch in the upper strata disappeared,and the caving mining in Dahongshan iron mine was entering in the release and stable stage. This conclusion was very favorable to the underground pressure safety of orebody above the side of goal.

关 键 词：采空区侧上方采矿 特大采空区贯通 次生应力分布 钻孔探测 承压拱 

分 类 号：TD323[矿业工程—矿井建设]