摘要
为了有效查明掘进巷道前方可能存在的断裂构造范围及其富水性,采用瞬变电磁法和直流电法超前探测技术在掘进巷道迎头进行综合探查,在31103运输大巷应用结果表明:富水断层在瞬变电磁法扇形等值线断面图中呈现视电阻率小于50Ω·m条带状的低阻区域,在导向富水地层方向,低阻区域呈现开口喇叭状;在直流电法断面图中富水断层呈现规则的切割煤层的条带状低阻,且断层范围与实际情况更吻合。2种方法探测可综合解释掘进巷道前方富水断层的范围及来水方向并相互验证,为解决相似地质问题提供技术参考。
In order to effectively identify the possible fracture structure range and its water-richness in front of the excavation roadway,the comprehensive detection and interpretation of the advanced detection technology of transient electromagnetic method and direct current method,through the application in31103 belt haulage roadway,the results show that transient electromagnetic method fan contours show low-resistance regions with strips with apparent resistivity less than 50 Ω·m.In the direction of the water-rich formation,the low-resistance regions present an open trumpet shape;the fault has a stripshaped low resistance that cuts the coal seam regularly,and the fault range is more in line with the actual situation.The comprehensive interpretation of the two methods can effectively detect the range of the water-conducting fault in front of the tunnel and the direction of the incoming water and verify each other,providing a technical reference for solving similar geological problems.
作者
李丹
LI Dan(CCTEG Xi’an Research Institute Co.,Ltd.,Xi’an 710077,China)
出处
《煤炭技术》
CAS
北大核心
2022年第4期67-70,共4页
Coal Technology
基金
国家重点基础研究发展计划(973计划)资助项目(2017YFC0804105)。
关键词
物探方法
综合超前探测
富水断层构造
应用效果
geophysical methods
comprehensive advance exploration
water-rich fault structure
application effect
