赵固二矿地质体改造注浆防治水技术及应用

介绍新型煤矿注浆系统在赵固二矿防治水中的应用。该矿采用地质体注浆改造系统对太灰、奥灰含水层进行注浆充填，封堵透水裂隙，把含水层改造成弱含水层或隔水层。系统采用水泥-黏土混合浆液，密度1.12～1.4 t/m3，泵送注浆，流量34～250 L/min，选用内径41～50 mm地质管作为注浆管。自2009年系统建成以来，2年内共向煤层底板注入水泥3 000多t，系统运行平稳可靠，注浆效果良好，完全满足矿井防治水工作需求，创造经济效益1 159.20万元。

The Geological Transformation Grouting Technology for Water-blocking and Its Application in Zhaogu No.2 Coal Mine

This paper describes the application of a new grouting system for water-blocking in Zhaogu No.2 Coal Mine.The mine adopted the geological transformation grouting system to grout the Taiyuan and Ordovician limestone aquifer，to block the permeable fracture，and also to transform the aquifer into aquitard or impermeable layer.The cement-clay mixed slurry with the density of 1.12~1.4 t/m3 was used in the system，and the slurry was pumped into underground at velocity of 34～250 L/min，with the pipeline's diameter of 41~50 mm.About 3 000 t cement has been grouted since the system was built in 2009，the system is stable in operation，and the effect of grouting is good.The system could totally meet the demand of underground water-blocking with economic benefits of 11 592 000 yuan achieved.