义桥煤矿立井井筒涌水机理与注浆封堵技术

针对义桥煤矿复杂水文地质条件下深厚表土层立井壁破裂、井筒涌水严重,采用单液及双液水泥、水玻璃多次封堵无效的技术难题,结合井壁破裂理论中的施工质量说和竖直附加应力说,分析了义桥煤矿主副立井井壁涌水特征及变形破坏机理,在此基础上,研究了高分子化学材料马丽散N注浆封堵涌水、加固围岩机理,并制定了主副井筒表土段壁间注浆、基岩段壁后注浆的钻孔布置与施工工艺,并对注浆量、注浆压力等进行了过程监控,对井筒涌水量进行了长期监测,实测涌水量已小于0.05 m3/h,达到了防治井壁破裂、封堵涌水、稳定含水层水压的目的,缓释和抑制了井壁附加压力。

Water Gushing Mechanism and Grouting Sealing Technology of Vertical Shaft lining in Yiqiao Coal Mine

According to the technical problem of mine shaft lining breaking,water gushing seriously in shaft,many invalid sealing of using single liquid and dual fluid cement and sodium silicate in the deep and thick topsoil under complex hydrogeology conditions of Yiqiao coal mine,combining with the construction quality hypothesis and the vertical additional stress hypothesis of the mine shaft lining breaking theory,the water gushing characteristics and deformation failure mechanism of the main and auxiliary shaft were analyzed.And on this basis,grouting and blocking water gushing and reinforcement of surrounding rock mechanism of the high polymer chemistry material marithan N were studied,and the drill hole layout and the construction technology of grouting between borehole wall of topsoil section,grouting behind the wall of the bedrock section were formulated,and the process monitoring for the grouting quantity and grouting pressure were carried out.Through long-term monitoring of the shaft lining water gushing,the shaft lining water gushing was less than 0.05 m3/h,which realized the purpose of preventing and controlling of shaft lining water gushing,shaft lining breaking,stability of aquifer water pressure,and released and inhibited additional pressure of mine shaft-lining.