Application of borehole transient electromagnetic method in detection of floor failure depth in fully mechanized top coal caving face

被引：0
|
作者：
Wang C. [1 ]
An Y. [1 ]
Zhu H. [1 ]
Guo J. [1 ]
机构：
[1] Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an
来源：
Meitiandizhi Yu Kantan/Coal Geology and Exploration | 2022年 / 50卷 / 07期
关键词：
electrical damage layer; floor failure depth; subsection water pressure test; transient electromagnetic method in hole;
D O I：
10.12363/issn.1001-1986.21.12.0862
中图分类号：
学科分类号：
摘要：
The carboniferous-Permian No. 6 coal seam in the eastern Jungar Coalfield of Ordos Basin is an extra-thick coal seam, and the coal floor is particularly threatened by the Ordovician limestone aquifer. The mining effect will lead to the formation of the bottom mining damage zone, and new water-conducting channels may be formed, which in turn will cause sudden water disasters. Aiming at the testing problem of floor mining failure zone, the method of transient electromagnetic method in hole with moving source and receiving is proposed to obtain resistivity characteristic data of strata from floor drilling before and after mining. Firstly, the resistivity difference of the TEM method in the complete and two-layer rock model is compared by numerical simulation, and the proposed method has a good resolution for the two-layer rock model. We conducted a test at the fully mechanized top coal caving face 6119 extra-thick coal seam in Jungar coalfield, and obtained the bottom damage depth by probing the bottom electrical difference layer, and the results were verified to be accurate and reliable. The research shows that the more accurate floor failure depth can be obtained by comparing the results of pre-mining and post-mining, which provides a new method for testing the failure depth of working face under similar conditions. © 2022 Science Press. All right reserved.
引用
收藏
页码：79 / 84
页数：5
相关论文
共 24 条
  • [11] LIU Shucai, LIU Xinming, JIANG Zhihai, Et al., Research on electrical prediction for evaluating water conducting fracture zones in coal seam floor[J], Chinese Journal of Rock Mechanics and Engineering, 28, 2, (2009)
  • [12] (2008)
  • [13] WU Rongxin, LIU Shengdong, ZHANG Pingsong, The exploration of two−gateways parallel 3−D electrical technology for water–rich area with in coal face floor[J], Journal of China Coal Society, 35, 3, pp. 454-457, (2010)
  • [14] GAO Zhaoning, MENG Xiangrui, ZHAO Guangming, DC electrical resistivity CT survey of deformation and damage law of coal floor[J], Journal of Chongqing University, 34, 8, (2011)
  • [15] YANG Feng, PENG Suping, A new method of ground penetrating radar (GPR) exploration to near hidden trouble under mining[J], Journal of China Coal Society, 31, Sup.1, (2006)
  • [16] ZHANG Pingsong, LIU Shengdong, WU Rongxin, Observation of overburden failure of coal seam by CT of seismic wave[J], Chinese Journal of Rock Mechanics and Engineering, 23, 15, pp. 2510-2513, (2004)
  • [17] ZHANG Pingsong, LIU Chang, OU Yuanchao, Et al., Comprehensive testing research on floor damage characteristics of mining extra–thick seam in Jungar coalfield[J], Coal Geology & Exploration, 49, 1, pp. 263-269, (2021)
  • [18] (2016)
  • [19] CHEN Ding, CHENG Jiulong, WANG Aming, Numerical simulation of drillhole transient electromagnetic response in mine roadway whole space using integral equation method[J], Chinese Journal of Geophysics, 61, 10, pp. 4182-4193, (2018)
  • [20] ZHANG Pingsong, LI Shenglin, QIU Shi, Et al., Advance detection technology and development of fast intelligent roadway drivage[J], Journal of China Coal Society, 46, 7, pp. 2158-2173, (2021)
123