基于ANSYS的矿井直流电场研究  

Study of DC electric-field of mine based on ANSYS

作　　者：张军 赵莹 马炳镇 

机构地区：[1]中国煤炭科工集团西安研究院,西安710077 [2]西安大地测绘工程有限责任公司,西安710054

出　　处：《地球物理学进展》2012年第6期2609-2616,共8页Progress in Geophysics

基　　金：国家自然科学基金面上项目(40774066);国家自然科学基金重点项目(50539080)联合资助

摘　　要：矿井直流电阻率法超前探测是预测掘进工作面前方潜在灾害体的一种物探方法,该方法具有经济、快捷、方便及施工效率高等优点,但其在在理论研究方面还不是很成熟.本文利用ANSYS软件通过有限元数值模拟方法对典型的地电模型的全空间的巷道影响等问题进行了研究.结果表明:巷道空腔的存在使稳定电流场的分布发生改变,尤其在巷道迎头附近影响极为严重,但随着电极距的增大巷道影响明显减小.层状介质模型中的异常特征不仅与层状介质各层间电性、层厚有关,还与异常体的导电性、尺寸、形状以及巷道迎头的距离等因素有关.he direct current resistivity method advanced detection in mines is a kind of geophysical prospecting method used to predict potential disasters ahead the excavated work face,which has many advantages,such as economical,convenient,high-efficiency and so on,however,in the aspect of theory,it is immature.In this paper,whole space tunnel influence and several typical models are studied by means of finite element numerical simulation method using ANSYS.Tunnel influence and several typical models are studied by means of finite element numerical simulation method.In the paper the analytical method is introduced to compute the natural electrical field of spot electricity source formed under the condition of homogeneous field.And via the finite difference method,the abnormity potentio-field which is aroused by the geoelectric abnormity body is computed and the practicality simulating apparent resistivity is achieved,which simplifies the question to simulate three-dimensional geoelectric field and the computing precision can be cont rolled effectively.The results show that the existence of roadway cavity changes the distribution of stable current field,especially around the face of the roadway.However,as the electrodes distance increases,roadway influence decreases significantly.The abnormal characteristics not only involve with electric conductivity differences between layers and the thickness of each layer,but also has something to do with anomalous body＇s conductivity,size,shape and the distance to the roadway face.

关 键 词：直流电场 超前探测 ANSYS 三维模拟 有限元 

分 类 号：P631[天文地球—地质矿产勘探]