The fault structure is an important basis for dividing the oilfield and its mining area boundaries.It also plays a crucial role as a water inflow pathway in the mine,which affects the aquifer's degree of wa-ter enrichment.The water enrichment and conductivity of fault structures determines the difficulty level of wa-ter prevention and control work in mines to some extent.The Yingjun No.1 Mine is distributed with areas prone to high risk of sudden water influx due to erosion.Based on 3D seismic detection,the transient elec-tromagnetic detection method is employed to analyze and research the water enrichment and conductivity of 11 fault locations,combining the analysis of physical property responses from logging curves.The areas with-in the well field with water enrichment and conductivity are mainly located in the sandstone layer at the roof between the second and eighth coal seams.Seven faults with localized water enrichment anomalies are identi-fied in the sandstone layer of the second coal seam roof,with another four faults without such anomalies in the same area.Eight faults with localized water enrichment anomalies are identified in the sandstone layer of the eighth coal seam roof,with another three faults without such anomalies in the same area.Through com-prehensive analysis of data from two geological exploration boreholes,issues such as bit bouncing and stick-ing,borehole diameter narrowing and rock strata collapse,mud loss,and water level elevation during aquifer pumping test are identified for DF37 fault,indicating its water enrichment and conductivity.The use of log-ging data on rock density,resistivity,natural gamma-ray logging anomalies,and the study of differences in water quality and content in aquifers has yielded positive results in determining the water enrichment and conductivity of faults.The determination of water enrichment and conductivity of faults using the above meth-ods provides geological support for mine water prevention and control and ensures safety in production.
关键词
断层构造/富导水性/瞬变电磁/测井成果
Key words
Fault Structure/Water Enrichment and Conductivity/Transient Electromagnetic/Logging Results
维普
万方数据