Comprehensive detection technique for coal seam roof water flowing fractured zone height

LI Chaofeng; HU Weiyue; WANG Yunhong; LIU Yingfeng; ZHOU Linsheng

doi:10.3969/j.issn.1001-1986.2018.01.018

Volume 46 Issue 1

Feb. 2018

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COAL GEOLOGY & EXPLORATION > 2018 > 46(1): 101-107. > DOI: 10.3969/j.issn.1001-1986.2018.01.018

LI Chaofeng, HU Weiyue, WANG Yunhong, LIU Yingfeng, ZHOU Linsheng. Comprehensive detection technique for coal seam roof water flowing fractured zone height[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(1): 101-107. DOI: 10.3969/j.issn.1001-1986.2018.01.018

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Comprehensive detection technique for coal seam roof water flowing fractured zone height

1. China Coal Research Institute, Beijing 100013, China;
2. Xi'an Research Institute, China Coal Technology and Engineering Group Corp., Xi'an 710077, China;
3. Shaanxi Key Laboratory of Prevention and Control Technology for Coal Mine Water Hazard, Xi'an 710077, China

Funds:

The National Key Research and Development Program of China(2017YFC0804106)

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Received Date: May 30, 2017
Published Date: February 24, 2018

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Abstract

Abstract

Heights of roof strata "two-zone" should be measured for each new coal mine. To determine water flowing fracture zone height of the first mining face roof in Gaojiabu coal mine comprehensively, three methods including injection water leakage measuring in upward slant holes, underground-ground joint microseismic monitoring and numerical simulation with UDEC were applied. Similar fracture zone height values which are 88.03 m, 86.54 m and 87.00 m were detected by three methods near the working face stop line. Combined with injection water leakage measurement in underground upward slant hole or surface borehole, strata deformation and failure time-space four dimensional characteristics can be monitored by the underground-ground joint microseismic method which has outstanding advantages in analyzing the changing rule of the fracture zone height.

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