超细水泥注浆溶液配比优化及扩散规律研究

采矿与安全工程学报 ›› 2014, Vol. 31 ›› Issue (2): 304-309.

超细水泥注浆溶液配比优化及扩散规律研究

北京科技大学土木与环境工程学院，金属矿山高效开采与安全教育部重点实验室，北京 100083

出版日期:2014-03-15 发布日期:2014-03-20
作者简介:吴爱祥(1963-)，男，湖北省仙桃市人，博士，教授，博士生导师，从事采矿与岩石力学方面的研究。通信作者：韩斌 E-mail：hanb66@126.com Tel：13241806882
基金资助:
国家自然科学基金重点项目(50934002)；教育部长江学者和创新团队发展计划项目(IRT0950)；国家自然科学基金项目(51074013)；国家“十二五”科技支撑计划项目(2012BAB08B02)

Optimization of mix-proportion and diffusing rule of super-fine cement grouting slurry

Online:2014-03-15 Published:2014-03-20

摘要/Abstract

摘要： 某铜矿节理裂隙发育，矿体围岩极其破碎，需大量加固支护，优选超细水泥注浆工艺，采用正交设计试验方案，针对不同水灰比(W/C)及水泥浆/水玻璃体积比(C/S)开展了配合比优化室内试验和理论研究，提出满足注浆强度要求的最佳水灰比(W/C)、水泥浆/水玻璃体积比(C/S)，并基于推荐注浆溶液配合比进行现场注浆试验，确定了注浆压力及扩散半径等参数，建成了注浆工艺系统。现场工业应用表明：按照推荐注浆材料配比及工艺施工，炮孔成孔率提高25%，采场顶板允许暴露面积增大了110 m2，采场中矿石滞留量减少了约10%，矿石回收率提高了23.3%，实现了加固矿体，提高炮孔成孔率，增大矿石回收率的目标。

关键词: 超细水泥注浆, 水灰比, 配合比优化, 水玻璃, 注浆工艺系统

Abstract: The joint fissure of some copper mine is developed, and its surrounding rock and ore body are broken, which needs a great amount of reinforcement. The superfine cement grouting technology is selected, and then according to different ratio of water-cement (W/C) and volume ratio of cement slurry/sodium silicate (C/S), indoor mix optimization test and theoretical research is launched by using orthogonal designing test. Such parameters as the best W/C and C/S were put forward to meet the required strength of grouting pressure, and according to the recommended mix-proportion, test is conducted on the spot. Grouting pressure and diffusion radius are confirmed and in view of the above, the grouting system is built. Industrial application shows that into-hole rate is increased by 25%, with exposed area of the stope roof increased by 110 m2, the stope ore retention volume reduced by about 10%, and ore recovery ratio increased by 23.3% according to recommended grouting material proportion and grouting system. Goals of reinforcing ore body, improving blast holes rate and increasing ore recovery ratio are realized.

Key words: superfine cement grouting, water-cement ratio, mix optimization, sodium silicate, grouting system

吴爱祥, 于少峰, 韩斌, 王贻明, 黄明清, 王勇. 超细水泥注浆溶液配比优化及扩散规律研究[J]. 采矿与安全工程学报, 2014, 31(2): 304-309.

WU Aixiang, YU Shaofeng, HAN Bin, WANG Yiming, HUANG Mingqing, WANG Yong. Optimization of mix-proportion and diffusing rule of super-fine cement grouting slurry[J]. Journal of Mining & Safety Engineering, 2014, 31(2): 304-309.