摘要
为查明某矿83103工作面内部与顶板含水层富水性及上覆采空区的积水情况,基于瞬变电磁法理论基础、矿井煤层顶底板岩性特征及上覆采空区的地球物理特征,采用小线框重叠回线装置系统对工作面顶板岩层富水性进行了详细探测。根据研究区岩性及含水层的分布特征,对数据进行顶板上100、80、50、20 m及顺煤层切片,通过对瞬变电磁视电阻率等值线断面图和煤层顶板不同层位视电阻率等值线平面图进行综合分析,最终圈定3处视电阻率低阻异常区,推测异常区主要由顶板中细砂岩、砾岩裂隙含水及11-2#煤采空区低洼积水影响所致。经钻孔验证瞬变电磁成果与实际情况吻合度较高,表明瞬变电磁法可以较好地反映工作面顶底板含水层富水性及采空区积水情况,体现了矿井瞬变电磁法在探测矿井水害探测中具备良好的探测效果和技术优势,也为矿井瞬变电磁法探测工作提供了实例参考。
In order to find out the water-rich condition of the roof aquifer and the overlying goaf in 83103 working face of a mine.This paper is based on the theoretical basis of transient electromagnetic method,Lithologic characteristics of coal seam roof and floor and geophysical characteristics of overlying goaf.A small wire frame overlapping loop system is used to detect water richness in the roof strata of working face in detail.According to the lithology and aquifer distribution characteristics of the study area.Slice 100,80,50,20 m and along coal seams on the roof.The transient electromagnetic apparent resistivity contour map and the apparent resistivity contour map of different strata of coal seam roof are analyzed comprehensively.Finally,three abnormal areas with low apparent resistivity were delineated.It is inferred that the abnormal area is mainly caused by the water content in the cracks of medium fine sandstone and conglomerate in the roof and the low-lying water accumulation in the 11-2#goaf area.The results of transient electromagnetic drilling are in good agreement with the actual situation.The results show that the transient electromagnetic method can reflect the water richness of the aquifer and the water accumulation in the gob area.It shows that mine transient electromagnetic method has good detection effect and technical advantages in detecting mine water damage.It also provides a practical reference for mine transient electromagnetic detection.
作者
郭曼
杜少鹏
马索尼
刘颂仁
江晓磊
GUO Man;DU Shaopeng;MA Suoni;LIU Songren;JIANG Xiaolei(Beijing GEOCMW Geophysical Exploration Engineering Technology Co.,Ltd.,Beijing 100038,China)
出处
《能源研究与管理》
2024年第2期97-102,共6页
Energy Research and Management
关键词
瞬变电磁
矿井水害
采空区
含水层
视电阻率
transient electromagnetic
mine water hazards
mined area
aquifer
apparent resistivity
