基于瞬变电磁探测的小保当煤矿斜井井壁富水性探测
Detection of water-rich of the inclined shaft wall of Xiaobaodang Coal Mine based on transient electromagnetic detection
薛晓强 1张慧峰 1麻银斗 1徐裴1
作者信息
- 1. 陕西小保当矿业有限公司,陕西神木 719300
- 折叠
摘要
小保当煤矿斜井穿过多个孔隙富水岩层,造成井筒在生产过程中多处出现渗水甚至淋水情况,对井筒稳定运行形成潜在威胁.为明确井筒壁后围岩富水特征、精准识别井筒渗水水源、防止小保当煤矿井筒由于地下水腐蚀发生破裂,特采用PROTEM CM型井下瞬变电磁仪对其进行探测分析,并采集渗水点水样进行水离子实验,利用聚类分析和判别归类分析构建水源识别图版,分析渗水水源.分析结果表明,在一号煤矿主斜井中有6处低阻区域,副斜井有3处低阻区域;二号煤矿主斜井有7处低阻区域,副斜井有5处低阻区域;斜井低阻异常区域主要分布在安定组、直罗组和延安组第五段;且该矿井各含水层之间并未发生串层越流现象.实践表明,富水区域的存在是造成井筒渗水失稳的主要影响因素,且此次研究为预防小保当煤矿井筒失稳提供了重要参考,为采取精准补强措施提供了科学指导.
Abstract
The inclined shaft of Xiaobaodang Coal Mine passes through multiple pore water-rich strata,which causes water seepage or e-ven water spray in the production process of the shaft,which poses a potential threat to the stable operation of the shaft.Therefore,in or-der to clarify the water-rich characteristics of the surrounding rock behind the shaft wall,accurately identify the water source of the shaft seepage,and prevent the fracture of the Xiaobaodang Coal Mine shaft due to groundwater corrosion,the PROTEM CM downhole transient electromagnetic instrument was used to detect and analyze it,and the water sample of the seepage point was collected for water ion ex-periment.The water source identification chart was constructed by cluster analysis and discriminant classification analysis to analyze the source of seepage water.The analysis results showed that there were 6 low resistance areas in the main inclined shaft of No.1 Coal Mine and 3 low resistance areas in the auxiliary inclined shaft.There were 7 low resistance areas in the main inclined shaft of No.2 coal mine,and 5 low resistance areas in the auxiliary inclined shaft.The low resistivity anomaly area of inclined shaft was mainly distributed in the fifth section of Anding Formation,Zhiluo Formation and Yan'an Formation.And there was no cross-flow phenomenon between the aquifers in the mine.The practice shows that the existence of water-rich area is the main influencing factor of shaft seepage instability,and this study provides an important reference for preventing shaft instability in Xiaobaodang Coal Mine,and provides scientific support for taking precise reinforcement measures.
关键词
斜井/瞬变电磁法/富水性探测/水源识别Key words
inclined shaft/transient electromagnetic method/water-rich detection/water source identification引用本文复制引用
基金项目
国家自然科学基金(52104155)
河北省重点研发计划(22375422D)
出版年
2023
NETL
NSTL
维普
万方数据