以亨利煤矸石渣山治理工程为例，旨在优化注浆灭火浆液的配比，以提高煤矸石自燃治理的效果。选用P. O32.5普通硅酸盐水泥和F类Ⅱ级粉煤灰作为主要材料，通过正交试验法研究浆液的配比对其性能的影响。以水固比（A）和水泥固比（B）为变量（各设3个水平），构建L₉（3²）正交试验表，测试浆液的流动性、析水率、结石率、凝结时间等指标。试验结果表明，水固比和水泥固比对浆液性能有显著影响。浆液的流动性与水固比呈正相关，与水泥固比呈负相关；析水率与结实率呈负相关，水固比对其影响较大；凝结时间与水固比呈正相关，与水泥固比呈负相关。根据实验结果，确定了最佳浆液配比，并结合矿区矸石特性，提出了不同升压阶段的地面注浆孔材料配比方案。通过局部灭火和隔离带试验验证，治理效果良好，钻孔漏水缓慢，渣山温度逐步降低，为煤矸石自燃治理提供了有效的技术参考。

Taking the Henry gangue slag heap management project as an example, and aiming to optimise the proportioning of the grouting fire extinguishing slurry to improve the effect of spontaneous combustion management of coal gangue. P. O32.5 ordinary silicate cement and F class Ⅱ fly ash were selected as the main materials for the experiment, and the effect of slurry proportioning on its performance was investigated by orthogonal test method. Taking the water-solid ratio (A) and cement-solid ratio (B) as variables(3 levels each), L₉(3²) orthogonal test table was constructed to test the slurry fluidity, water precipitation rate, stone formation rate, setting time and other indexes. The test results show that the water-solid ratio and the cement-solid ratio have a significant effect on the performance of the slurry. The slurry fluidity is positively correlated with the water-solid ratio and negatively correlated with the cement-solid ratio. The water precipitation rate is negatively correlated with the cementation rate, and the water-solid ratio has a greater influence on it. The setting time is positively correlated with the water-solid ratio and negatively correlated with the cement-solid ratio. According to the experimental results, the best slurry ratio was determined, and combined with the gangue characteristics of the mining area, the ground injection hole material proportioning scheme was proposed for different boosting stages. Through the local fire extinguishing and isolation zone test verification, the management effect is good, the leakage of boreholes is slow, and the temperature of slag heap is gradually reduced, which provides an effective technical reference for the management of coal gangue spontaneous combustion.