摘要
某铜矿节理裂隙发育,矿体围岩极其破碎,炮孔成孔率低,需大量加固支护,优选美固MP 364矿用树脂进行现场化学注浆试验,确定注浆压力及扩散半径等参数,建成注浆工艺系统。现场工业应用表明:按照推荐注浆材料配比及工艺施工,岩体强度得到极大提高,炮孔成孔率提高25%,采场顶板允许暴露面积增大110 m2,采场中矿石滞留量减少约10%,矿石回收率提高23.3%,实现加固矿体,提高炮孔成孔率,增大矿石回收率的目标。
The joint fissures of a copper mine is very well developed with the fragmental surrounding rock and ore body. The success rate of drilling holes for explosive installation was low,so reinforcement was needed. The explosion resistant resin MP 364 for mine applications was selected for the chemical grouting test in-situ. The grouting pressure and the diffusion radius etc were determined experimentally. A grouting system was built based on the experimental results. After the application of the chemical grouting according to the recommended proportion of grouting materials,the rock mass strength was improved significantly,the success rate of drilling holes for explosive installation was increased by 25%,the exposed area of the stope roof was increased by 110 m2,the retention volume of the stope ore was reduced by about 10%,and the ore recovery ratio was increased by 23.3%.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2014年第12期2396-2401,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金重点项目(50934002)
国家自然科学基金资助项目(51074013)
"十二五"国家科技支撑计划项目(2012BAB08B02)
关键词
采矿工程
加固支护
化学注浆
注浆工艺系统
炮孔成孔率
矿石回收率
mining engineering
reinforcement support
chemical grouting
grouting system
into-hole rate
ore recovery ratio
