长极距定源建场法超前预报掘进工程隐患  

Research on the electric method for hidden trouble forecast in tunnel excavation with fixed source by long distance electrodes

作　　者：朱德兵[1] 周科平[2] 邓红卫[2] 

机构地区：[1]中南大学有色金属成矿预测教育部重点实验室,地球科学与信息物理学院,湖南长沙410083 [2]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《煤田地质与勘探》2012年第3期74-77,共4页Coal Geology & Exploration

基　　金：湖南省自然科学基金项目(05JJ30074);湖南省科技重大专项(2011Fj1003)

摘　　要：巷道或隧道掌子面超前预测预报,受空间限制和现场电干扰等诸多因素的影响,难以获得信噪比高的电位数据。将长极距定源建场法用于地下掘进工程超前预报,在AB电极中间段,掘进掌子面前方的电阻率或极化率异常地质体都会使近似均匀电流场发生扰动,形成电场或激发极化率异常,从而使这种预报方法对掌子面前方或附近异常体具有一定的分辨能力。这一超前预报方法克服了电法仪器需要在巷道内供电所带来的诸多不便,适用于煤矿等生产矿山以及交通、水利水电等掘进工程领域超前预报。As surveying with Schlumberger array, an approximate homogeneous electric field can be built in the middle one-third of the length of the electrodes AB stricken into the earth. This ground building pattern can be applied in the electric advanced forecast in tunnel excavation. In the middle of electrodes AB, those abnormal geological bodies with low resistivity or high induced polarization will result in the electric field or the induced field abnormity. The forecast method by measuring the abnormity is a new way to predict the hidden trouble ahead the tunnel excavating face and the precision is definite. The method overcomes the inconvenience as supplying electric power in the excavating tunnel and fits for the hidden trouble forecast in mines such as coal mine, the tunnel engi- neering of highways, water conservancy and hydropower.

关 键 词：长极距定源建场法 超前预报 掘进工程 

分 类 号：P631[天文地球—地质矿产勘探]