软弱破碎矿体化学注浆浅孔留矿法试验研究  

Experimental research on chemical grouting short hole shrinkage for weak-broken orebody

作　　者：吴爱祥[1] 刘超[1] 韩斌[1] 黄明清[1] 于少峰[1] 王恒[1] 

机构地区：[1]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《采矿与安全工程学报》2015年第1期150-155,共6页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金重点项目(50934002);国家自然科学基金项目(51074013);教育部长江学者和创新团队发展计划项目(IRT0950);国家"十二五"科技支撑计划项目(2012BAB08B02)

摘　　要：汤丹铜矿矿体开采技术条件极为苛刻,矿体及围岩松散、破碎、含泥量高、自稳能力差,造成采矿过程中凿岩成孔率低、放矿困难、贫损高、生产能力差等诸多困难。通过对不同注浆的方法对比、理论计算、类比分析,确定采用裂隙化学注浆方案;通过化学浆液注入矿体及上盘部分围岩裂隙中,将松散的岩体黏结为一个整体,从而改善工程岩体的力学特性、完整性,提高炮孔成孔率及各项采矿指标;采用力学计算、室内实验及ANSYS与FLAC3D数值模拟,通过9种方案对比,得出顶柱15 m、矿柱16 m、矿房12 m为最佳设计方案。现场工业试验结果表明:裂隙高压化学注浆浅孔留矿法可以增强矿岩稳定性,提高采场安全系数,增加存窿矿石流动性,降低贫损指标,实现软弱破碎矿体的安全高效开采。The mining condition of deposit is extremely harsh in Tangdan Copper Mine, and the orebody and surrounding rock are loose, broken, unstable and have high mud content, so it causes a series of problems during mining such as difficulty of hole-forming and drawing, high dilution and loss rate and poor production capacity. Grouting technical scheme has been determined by the comparison of theoretical calculation and engineering analogy among different grouting schemes. The friable rocks will be bonded as a whole after the grout injected into orebody and part of hanging wall, and the mechanical property and integrity of the engineering rock mass, the hole-forming and mining index will all be improved. Through the comparison of 9 schemes based on mechanical calculation, lab experiments, and numerical simulation by using ANSYS and FLAC^3D, the optimum design scheme in which the top pillars should be 15 m, the jams 16 m and the chamber 12 m has been concluded. The industrial experiment indicated that chemical grouting applied in short-hole shrinkage method can enhance ore＇s stability, improve the safety coefficient of stope, increase the fluidity of stored ores, decrease mining loss and dilution rate, which can realize the safety and efficiency mining of weak-broken ore.

关 键 词：软弱破碎 化学注浆 数值模拟 安全高效开采 工业试验 

分 类 号：TD853[矿业工程—金属矿开采]