新庄矿井井筒涌水量预测及围岩综合工程地质评价

Forecast of wellbore water inflow and comprehensive engineering geological evaluation of surrounding rock in Xinzhuang Mine

为了给新庄矿井井筒设计和施工提供可靠的水文地质以及工程地质参数,研究了新庄矿井井筒涌水量预测及围岩综合工程地质评价,根据新庄矿井井筒施工钻孔的揭露,得到了该研究区的地质概况;采用承压-潜水完整式水平坑道公式以及井壁进水法等,得到了最大井筒涌水量,华池组、直罗-延安组最大井筒涌水量,洛河组全断面进水最大涌水量等。分析得出,此次预测公式采用合理,数据真实、可信,可作为下一步井筒施工的参考依据;并得出井筒范围各组段岩石的RQD值,RQD值多在40%~85%,岩石的完整性为中等。研究为井壁结构及施工方案提供必要的依据。

In order to provide reliable hydrogeological and engineering geological parameters for wellbore design and construction of Xinzhuang Mine,the water inflow budget of Xinzhuang Mine shaft and the comprehensive engineering geological evaluation of surrounding rock were studied.According to the disclosure of borehole construction in Xinzhuang Mine wellbore,the geological overview of the study area was obtained.The maximum wellbore water inflow,the maximum shaft inflow of Huachi Formation and Zhiluo Yan′an Formation,and the maximum full section inflow of Luohe Formation were obtained by using the pressure bearing-diving complete horizontal tunnel formula and the shaft wall inflow method.The analysis shows that the budget formula is reasonable and the data is true and credible,which can be used as a reference for the next wellbore construction;and the RQD value of each group of rocks in the wellbore range is obtained,and the research shows that the RQD value is more than 40%~85%,the rock integrity is medium.The research provides the necessary basis for the shaft lining structure and construction plan.