Application of mine-hole joint microseismic technology in monitoring the damage depth of working face floor

Authors

DUAN Jianhua, Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China
YAN Wenchao, Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China
NAN Hanchen, Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China
ZHANG Qingqing, Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China
FAN Xin, College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China; Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi’an 710054, China

Abstract

Accurate prediction of the mining damage depth of floor is a key problem in the prevention and control of mining floor water hazard especially in the case with confined water. It is very important for developing the strategy of water control. According to the geological characteristics and working face layout of Baode coal mine, Shaanxi Province, a high-precision microseismic monitoring system consisting of well and hole arrays was deployed to detect the floor damage depth in working face 81307 in real time. The velocity model was calibrated and the location accuracy was verified by hammering method. It is proved that the location accuracy of microseismic monitoring system could meet the requirements of water prevention and control. During the monitoring period, the working face was mined 600 meters. The study results show that the damage depth of the floor is 30 meters below the floor, among them, the damage depth of 81308 No.2 air return laneway was deeper than that of 81307 No.1 air return laneway, but the damage depth of 81307 No.1 air return laneway was only 15 meters, which is consistent with the results measured by hydraulic fracturing experiment in the adjacent working face 81306. The combined mine-hole microseismic monitoring technology can obtain the damage depth and its spatial distribution characteristics of the floor of the working face, and it can better serve coal mine water prevention and control.

Keywords

mine-hole joint microseismic monitoring technology, floor damage depth, microseismic events, Baode coal mine

DOI

10.3969/j.issn.10011986.2020.01.028

Recommended Citation

DUAN Jianhua, YAN Wenchao, NAN Hanchen, et al. (2020) "Application of mine-hole joint microseismic technology in monitoring the damage depth of working face floor," Coal Geology & Exploration: Vol. 48: Iss. 1, Article 29.
DOI: 10.3969/j.issn.10011986.2020.01.028
Available at: https://cge.researchcommons.org/journal/vol48/iss1/29

Reference

[1] 谢和平,钱鸣高,彭苏萍,等. 煤炭科学产能及发展战略初探[J]. 中国工程科学,2011,13(6):44-50. XIE Heping,QIAN Minggao,PENG Suping,et al.Sustainable capacity of coal mining and its strategic plan[J].Engineering Sciences,2011,13(6):44-50.

[2] 何满潮,朱国龙."十三五"矿业工程发展战略研究[J].煤炭工程,2016,48(1):1-6. HE Manchao,ZHU Guolong. Research on development strategy of mining engineering in the Thirteenth Five-year Plan[J].Coal Engineering,2016,48(1):1-6.

[3] 徐智敏,孙亚军,巩思园,等. 高承压水上采煤底板突水通道形成的监测与数值模拟[J]. 岩石力学与工程学报,2012,31(8):1698-1704. XU Zhimin,SUN Yajun,GONG Siyuan,et al. Monitoring and numerical simulation of formation of water inrush pathway caused by coal mining above confined water with high pressure[J]. Chinese Journal of Rock Mechanics and Engineering,2012,31(8):1698-1704.

[4] 虎维岳,尹尚先.采煤工作面底板突水灾害发生的采掘扰动力学机制[J].岩石力学与工程学报,2010,29(增刊1):1698-1704. HU Weiyue,YIN Shangxian. Dynamic mechanism of water inrush from floor of mining face[J]. Chinese Journal of Rock Mechanics and Engineering,2010,29(S1):1698-1704.

[5] ZHU Shuyun,JIAN Zhenquan,HOU Hongliang,et al. Analytical model and application of stress distribution on mining coal floor[J]. Journal of China University of Mining and Technology,2008,18(1):13-17.

[6] 何满潮,谢和平,彭苏萍,等. 深部开采岩体力学研究[J]. 岩石力学与工程学报,2005,24(16):2803-2813. HE Manchao,XIE Heping,PENG Suping,et al. Study on rock mechanics in deep mining engineering[J]. Chinese Journal of Rock Mechanics and Engineering,2005,24(16):2803-2813.

[7] 姜波,李明,屈争辉,等.构造煤研究现状及展望[J].地球科学进展,2016,31(4):335-346. JIANG Bo,LI Ming,QU Zhenghui,et al.Current research status and prospect of tectonically deformed coal[J]. Advances in Earth Science,2016,31(4):335-346.

[8] 袁亮.我国深部煤与瓦斯共采战略思考[J]. 煤炭学报,2016,41(1):1-6. YUAN Liang. Strategic thinking of simultaneous exploitation of coal and gas in deep mining[J]. Journal of China Coal Society,2016,41(1):1-6.

[9] 张波,常晓峰. 煤层底板采动破坏深度预测方法与应用[J]. 煤炭技术,2018,37(12):20-23. ZHANG Bo,CHANG Xiaofeng. Prediction method and application of coal mining floor failure depth[J]. Coal Technology,2018,37(12):20-23.

[10] 王悦,于水,王苏健,等. 微震监测技术在煤矿底板突水预警中的应用[J]. 煤炭科学技术,2018,46(8):68-73. WANG Yue,YU Shui,WANG Sujian,et al. Application of microseismic monitoring technology in water inrush warning of coal mine floor[J]. Coal Science and Technology,2018,46(8):68-73.

[11] 张平松,孙斌杨. 煤层回采工作面底板破坏探查技术的发展现状[J]. 地球科学进展,2017,32(6):577-588. ZHANG Pingsong,SUN Binyang. Development status of the development status of the detection technology for coal-seam stope floor damage[J]. Advances in Earth Science,2017,32(6):577-588.

[12] 姜福兴,叶根喜,王存文,等. 高精度微震监测技术在煤矿突水监测中的应用[J]. 岩石力学与工程学报,2008,27(9):1932-1938. JIANG Fuxing,YE Genxi,WANG Cunwen,et al. Application of high precision microseismic monitoring technique to water inrush monitoring in coal mine[J]. Chinese Journal of Rock Mechanics and Engineering,2008,27(9):1932-1938.

[13] 程爱平,高永涛,梁兴旺,等.煤矿底板潜在突水危险区微震识别研究[J]. 岩土工程学报,2014,36(9):1727-1732. CHENG Aiping,GAO Yongtao,LIANG Xingwang,et al.Identification of potential water inrush areas in coal floor by using microseismic monitoring technique[J]. Chinese Journal of Geotechnical Engineering,2014,36(9):1727-1732.

[14] 刘超,吴顺川,程爱平,等. 采动条件下底板潜在导水通道形成的微震监测与数值模拟[J]. 北京科技大学学报,2014,36(9):1129-1135. LIU Chao,WU Shunchuan,CHENG Aiping,et al.Microseismic monitoring and numerical simulation of the formation of water inrush pathway caused by coal mining[J].Journal of University of Science & Technology Beijing,2014,36(9):1129-1135.

[15] 康继忠. 煤柱下巷道的应力敏感性分区特征及响应机制[D]. 徐州:中国矿业大学,2016. KANG Jizhong. Stress sensitivity zoning characteristics and response of roadway under coal pillar[D]. Xuzhou:China University of Mining and Technology,2016.