坑道掘进立体电法超前预报技术研究  

A Study on Stereo Electric Method Advance Prediction Technology in Tunnel Excavation

作　　者：张平松[1] 刘盛东[2] 曹煜[3] 

机构地区：[1]安徽理工大学地球与环境学院,安徽淮南232001 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221006 [3]安徽惠洲地下灾害研究设计院,安徽合肥230088

出　　处：《中国煤炭地质》2009年第2期50-53,共4页Coal Geology of China

基　　金：国家重点基础研究发展计划(973)项目(2006CB202209)

摘　　要：坑道前方破碎带、含水体等地质异常一直是影响掘进生产安全的一个重要因素,因此必须对其进行超前探测与预报。近年来,坑道直流电阻率法在前方含水异常体探测预报中发挥了重要的作用,但受坑道条件的限制也存在不足之处。在分析坑道三极跨步直流电法测试布置的基础上提出了立体电法超前探测布置,并通过三维立体直流电阻率反演获得探测区间三维电阻率分布结果,为坑道前方岩层富水性判定提供依据。安徽某矿-780m南翼轨道大巷跟踪探测与预报实践表明,三维立体电法超前探测技术可对巷道前方100m以内的各种含水地质构造进行有效探测与预报,为巷道安全掘进提供可靠的地质技术参数。Geological abnormities of fractured zones, water-bearing bodies etc. in front of tunnels are the roajor factors of drifting safety, thus have to have pilot detection and prediction carried out. In recent years, the DC resistivity method in tunnel has played an important role in front water-bearing anomalous body detection and prediction, but insufficiencies are existed because of limitations from tunnel conditions. Based on the tunnel tri-pole step DC electric method layout analysis put forward the stereo electric method pilot detection layout. Through 3D stereo DC resistivity inversion to get 3D resistivity distribution results among detection areas, thus provide basis to determine water yield property of strata in front of tunnels. The practices of tracking detection and prediction of - 780m south wing main track roadway of an Anhui coalmine have demonstrated that the 3D stereo electric method can effectively detect and predict various water-bearing geological structures within 100m in front of roadways, thus provide with reliable geologic technical parameters for roadway drifting safety.

关 键 词：立体直流电法 超前预报 含水异常构造 坑道 

分 类 号：P631.3[天文地球—地质矿产勘探]