摘要
华北型煤田水文地质条件复杂,受陷落柱、断层等构造水害威胁严重。为了精确查明陷落柱的发育形态及富水性,综合考虑地质体的地-电条件,组合一套陷落柱超前探测方法。以七五煤业3_上717运输巷陷落柱为研究对象,采用瞬变电磁法、并行电法、地震波进行联合超前探测,并对物探异常区进行钻孔探查。结果表明:陷落柱在水平方向上呈类椭圆形,长轴46.7 m,短轴28.6 m,面积约946 m^(2)。探查范围内整体富水性较弱,仅在迎头方向圈定YC1、YC2低阻异常区,其中陷落柱局部位于YC2范围内。两异常区均位于3_(上)煤层底板下方,主要受底板砂岩含水层影响。井下钻探揭露陷落柱发育范围、富水性情况与物探解译结果基本一致,验证了联合探查结果准确可靠,为今后类似条件地区的陷落柱发育形态及富水性超前探测提供实践依据。
The hydrogeological conditions of the North China type coalfield are complicated,and it is seriously threatened by water damage of collapse columns,faults and other structures.In order to accurately identify the development form and water richness of the collapse column,a set of advanced detection meth⁃ods for the collapse column is combined considering the geo-electrical conditions of the geological body.Taking the collapse column of transportation lane 3_(上),717 of Qiwu Coal Mining industry as the research ob⁃ject,the transient electromagnetic method,parallel electrical method and seismic wave advance detection are combined to advance detection,and the geophysical anomaly area is explored by drilling.The results show that the collapse column is ellipsoidal in the horizontal direction,with a major axis of 46.7 m and a mi⁃nor axis of 28.6 m,and an area of about 946 m2.The overall water richness was weak in the exploration range,and only YC1 and YC2 low-resistance anomaly areas were delineated in the head-on direction,in which the collapse column was partially located in the YC2 range.The two abnormal areas are located under the floor of 3上coal seam and are mainly affected by the sandstone aquifer of the floor.The development range and water-rich state of subsidence column revealed by downhole drilling are basically consistent with the results of geophysical interpretation,which verifies the accuracy and reliability of the joint exploration results,and provides practical basis for the development form of subsidence column and water-rich ad⁃vanced detection in similar areas in the future.
作者
章征峰
ZHANG Zhengfeng(Zaozhuang Mining(Group)Jining Qiwu Coal Industry Co.,Ltd.)
出处
《现代矿业》
CAS
2024年第5期22-26,共5页
Modern Mining
关键词
地下矿山
陷落柱
地-电-磁法
富水性
钻探验证
underground mine
collapse column
seismic-electric-magnetic method
water-rich
drilling verification
