千米级深立井高压注浆施工浅谈

宁夏银川宝丰能源集团有限公司建设的红四煤矿副井筒深度1002.5m,井筒表土段和部分基岩采用冻结法施工,井筒680m以下采用普通法施工,井筒的治水采用工作面预注浆方法,注浆过程中第一注浆段单孔涌水量达60m3/h,井筒均通过高压工作面预注浆后,安全穿过含水层,完成了井筒掘砌施工。

On High Pressure Grouting Construction of Kilometric Deep Shaft

The depth of the auxiliary shaft of red coal mine is 1002.5m constructed by Ningxia Yinchuan Baofeng Energy Group Limited Company, whose shaft surface soils and bedrock use freezing method construction, wellbore below 680m uses ordinary construction method, borehole water uses face pre grouting method. In the process of grouting, the first grouting section single hole discharge up to 60m^3/h, after pit shaft’s grouting through high pressure working face, it through the aquifer safely and achieves the shaft digging.