Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Coal Science and Technology》 2015-01
Add to Favorite Get Latest Update

Study on whole space transient electromagnetic method prospect three dimensional numerical modeling of gob water

YU Jing-cun;CHANG Jiang-hao;SU Ben-yu;JIANG Zong-lin;ZHOU Si-hui;School of Resources and Geosciences,China University of Mining and Technology;Xi'an Research Institute of China Coal Technology & Engineering Group Corporation;  
In order to prospect gob water precisely,the authors studied the whole space transient electromagnetic response of gob water by numerical modeling using three dimensional finite difference time domain method. The numerical modeling results show that in the situation of normal direction of the transmitting loop being parallel with tunnel,the response curve amplitude of time derivative for gob water located in ahead of heading face is stronger than that located in the two sides of heading face. Moreover,curve minimum value of situation with gob water located in ahead of heading face is smaller than that gob water located in two sides of heading face as well as the response time of situation with gob water located in ahead of heading face is earlier than that gob water located in two sides of heading face. However,the shape of two curves are similar. In addition,for the gob water with different volumes and different distances from the heading face,the response curves are different. Finally,the effectiveness of prospecting gob water of mining TEM is testified by drilling data,this shows that the mining TEM is one of very effective way to prospect gob water.
【Fund】: 国家重大科学仪器设备开发专项资助项目(2011YQ03013307)
【CateGory Index】: P631.325
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved