摘要
云南某铜矿矿体软弱破碎，成孔凿岩开采困难，引人化学注浆预加固方案优化开采，然而前期注浆工业实验中遇到浆液用量过多，难以准确控制的情况。为了对速凝的化学注浆施工进行精确控制、简化控制流程，应用注浆强度控制理论GIN值法（Grouting Intensity Number）研究开展破碎矿体化学注浆试验，建立破碎铜矿化学注浆控制标准，并通过钻孔探测仪检测注浆效果。结果表明，注浆强度GIN值法的工业应用应综合考虑注浆终压P，与每米浆液用量Ⅵ，确定扇形注浆孔不同深度范围的控制标准为：孔深0—8m，P，〈60MPa·L／m；孔深8—15m，P，〈95MPa·L／m；孔深〉15m，P，〈160MPa·L／m。钻孔探测仪检测结果显示，浆液扩散范围满足设计扩散半径2．5m，注浆后成孔效果有了显著改善。研究结果可用于量化注浆控制标准，简化工程应用，提高破碎矿体的稳定性。
A copper mine ore body in Yunnan Province is soft and fractured, so it is difficult to realize mining by hole drilling. Pre-reinforcement mining-optimized scheme with chemical grouting was introduced. However, in the beginning of the experiment, it is hard to accurately control the experiment, resulting in the problems that chemical slurry was over used. In or- der to quantize and simplify the control process of quick-setting chemical grouting applied in the copper mine, the Grouting In- tensity Number method was applied to the chemical grouting experiment for the study of fractured ore-body. The controlling standard for chemical grouting of a fractured copper mine was established and the grouting effect was detected by the drilling detector. Results showed that the industrial applications of GIN method should fully consider final pressure Pf and volume of chemical slurry Vf per meter. Furthermore,the controlling standards based on depth range of fan-pattern grouting holes were as follows：at the hole depth of from 0 to 8 m,Pf is less than 60 MPa · L/m;at the hole depth of from 8 m to 15 m,Pf is less than 95 MPa · L/re;at the hole depth of greater than 15 m,Pf is less than 160 MPa · L/m. The drilling detector indicated that the diffusion radius of chemical slurry reached 2.5 m and the pore-forming effect had been significantly improved after grouting. Consequently, this study can be used to quantify the grouting control standards, simplify engineering applications and improve the stability of the fractured ore body.
出处
《金属矿山》
CAS
北大核心
2014年第11期35-38,共4页
Metal Mine
基金
"十二五"国家科技支撑计划项目(编号:2012BAB08B02
2013BAB02B05)
高等学校博士学科点专项(编号:20110006130003
2011000612002)
关键词
化学注浆
GIN强度值
控制标准
效果检验
Chemical grouting, Grouting Intensity Number method, Control standards, Effect testing
