陕西煤炭

为降低注浆技术成本，优化矿井注浆材料，基于动态水灌浆中常用的水泥-粘土浆液原料，提出了矿井粘土-粉煤灰-水泥复合浆液的注浆材料，通过微观化学元素分析探讨了浆液的反应机理，并采用正交试验研究了多种因素对材料凝固时间、固化比、水分离率的影响。通过对实验样品开展单轴抗压强度与抗弯强度试验，得出了优化的浆液配比。结果表明，最佳性能的复合浆液配比为水固比为0.8∶1,水泥∶粉煤灰∶矿井粘土∶生石灰∶硫酸钠∶水的质量比为1∶0.45∶0.20∶0.05∶0.07∶1.32。最后，通过比较优化浆液和普通浆液固结样品的力学性能，表明了优化浆液具有优越的性能，可以满足一般灌浆工程的要求。

In order to reduce the cost of grouting technology and optimize the grouting materials of mine, based on the cement-clay grouting raw materials commonly used in dynamic water grouting, the grouting material of mine clay-fly-cement composite grout was proposed.The reaction mechanism of grout was discussed through microchemical element analysis.The effects of various factors on solidification time, solidifying ratio and water separation rate were studied by orthogonal test.Through uniaxial compressive strength and flexural strength tests on experimental samples, the optimized slurry ratio was obtained.The results show that the best performance of composite slurry ratio is water solid ratio of 0.8∶1,and the ratios of cement, fly ash, mine clay, lime, sodium sulfate and water quality is 1∶0.45:0.20∶0.05∶0.07∶1.32.Finally, by comparing the mechanical properties of consolidated samples between the optimized grout and ordinary grout, it is shown that the optimized grout has superior properties and can meet the requirements of general grouting engineering.