MULTI-FIELD INFORMATION MONITORING AND WARNING OF DELAYED WATER BURSTING IN DEEP ROCK FAULT

BAI Jiwen1 LI Shucai1 LIU Rentai1 ZHANG Qingsong1 ZHANG Hongjun1 SHA Fei1

(1.Geotechnical and Structural Engineering Research Center, Shandong University, Jinan, Shandong, China 250061)

【Abstract】Prevention and curing of delayed water bursting in rock fault are extremely difficult. Multiple field information monitoring and warning on delayed water bursting in deep rock fault in Wanglou coal mine were carried out. The source and conducting channel of ground water were analyzed. The delayed water bursting in fault during the mining process was divided into different stages. The temporal and spatial ranges of monitoring and warning were determined and the monitoring thresholds of temperature field and seepage pressure field were divided according to the theory of key water resisting layer and geophysical prospecting results, so that the identification criteria for monitoring and warning were established. Accurate and effective assembling of sensors was fulfilled by connecting them in series into monitoring units and plugging the drilling holes into sections using the returning slurry technique. Furthermore, the online monitoring on surface was fulfilled by taking advantage of the optical fibre monitoring system. Results showed that the extension of fissures in fault was effectively controlled by the water resisting coal wedge, which reduced the transmissibility of fractured fault zone.

【Keywords】 rock mechanics; fault hysteretic water bursting; monitoring and warning; multiple field information; monitoring threshold; identification criteria;

【DOI】

【Funds】 National Basic Research Program of China (2013CB036000) Young Scientists Fund of the National Natural Science Foundation of China (51309146) Fund for the Doctoral Program from the Ministry of Education of China (20130131120084)

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    References

    [1]WU Qiang, ZHU Bin, LIU Shouqiang. Flow-solid coupling simulation method analysis and time identification of lagging water-inrush near mine fault belt[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(1): 93-104 (in Chinese).

    [2]SHI Benqiang, HOU Zhongjie. Mechanical analysis of fault activation water inrush in overburden rock and its application[J]. Rock and Soil Mechanics, 2011, 32(10): 3 053-3 057 (in Chinese).

    [3]LIQingfeng, WANG Weijun, PENG Wenqing, et al. Influence of activation fault after coal extraction on coal mine karst water-inrush[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(1): 3 417-3 424 (in Chinese).

    [4]SONG Zhenqi, HAO Jian, TANG Jianquan, et al. Study on water inrush from fault's prevention and control theory[J]. Journal of China Coal Society, 2013, 38(9): 1 511-1 515 (in Chinese).

    [5]SUN Jian, WANG Lianguo. Floor fault water-inrush prediction based on catastrophe analysis of micro-seismic signals[J]. Journal of China Coal Society, 2013, 38(8): 1 404-1 410 (in Chinese).

    [6]SUN Jian, WANG Lianguo, TANG Furong, et al. Micro seismic monitoring failure characteristics of inclined coal seam floor[J]. Rock and Soil Mechanics, 2011, 32(5): 1 589-1 595 (in Chinese).

    [7]YANG Guoyong, CHECanhui, LIU Shucai. Numerical simulation of forecasting water inrush volume from fault[J]. Journal of Mining and Safety Engineering, 2010, 27(3): 351-358 (in Chinese).

    [8]HUYaoqing, YANG Guochao, SHI Xiuwei. Study on physical and numerical simulation of water inrush prediction theory for coal mining above confined aquifer[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(1): 9-15 (in Chinese).

    [9]JIANG Fuxing, YE Genxi, WANG Cunwen, et al. Application of high-precision micro seismic monitoring technique to water inrush monitoring in coal mine[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(9): 1 932-1 937 (in Chinese).

    [10]LI Xiaozhao, LUO Guoyu, CHEN Zhongsheng. The mechanism of deformation and water conduction of fault due to excavation in water inrush in underground engineering[J]. Chinese Journal of Geotechnical Engineering, 2002, 24(6): 695-700 (in Chinese).

    [11]YANG Tianhon, TANG Chun′an, TAN Zhihong, et al. State of the art of inrush models in rock mass failure and developing trend for prediction and forecast of groundwater inrush[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(2): 268-277 (in Chinese).

    [12]LIUChao, TANG Chun′an, ZHANG Shengjun, et al. Application of micro seismic monitoring system in Zhangmatun curtain region[J]. Journal of mining and safety Engineering, 2009, 26(3): 349-353 (in Chinese).

    [13]SUNMinggui, LI Tianzhen, HUANG Xianwu, et al. Mechanism of water inrush based on the instability of the seepage flow in rock strata[J]. Journal of China University of Mining and Technology, 2005, 34(3): 284-288 (in Chinese).

    [14]YAO Duoxi, LU Haifeng. Seepage field-strain field coupling analysis for rock masses of coal seam floor during mining above confined aquifer[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(Supp.1): 2 738-2 744 (in Chinese).

    [15]PANG Yihui, ZHANG Yong. Experimental study of rock permeability under triaxial compression[J]. Journal of Mining and Safety Engineering, 2009, 26(3): 367-371 (in Chinese).

    [16]PAN Yishan, WANG Laigui, ZHANG Mengtao, et al. Theoretical and experimental study on fault rock burst[J]. Chinese Journal of Rock Mechanics and Engineering, 1998, 17(6): 642-649 (in Chinese).

    [17]LU Xingli, LIU Quansheng, WU Chang, et al. Hydro-mechanical coupling analysis of mining effect around fault fractured zone[J]. Rock and Soil Mechanics, 2009, 30(Supp. ): 165-168 (in Chinese).

    [18]LUANYuanzhong, LI Jingtao, BAN Xunhai, et al. Observational research on the height of water flowing fractured zone in repeated mining of short-distance coal seams[J]. Journal of Mining and Safety Engineering, 2010, 27(1): 139-142 (in Chinese).

    [19]HEGuicheng, XIAO Fuguo, ZHANG Zhijun, et al. Prediction of the height of the transmissive fractured belt of a mining stope under a quifering Kangjiawan mine[J]. Journal of Mining and Safety Engineering, 2011, 28(1): 122-126 (in Chinese).

    [20]CHAI Huichan, LI Wenping. Analysis of developing mechanism of water transmitting fractured zone mining approaching to weathered and oxidized zone[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(7): 1 319-1 328 (in Chinese).

    [21]XU Jialin, QIAN Minggao. The identification method of key strata location[J]. Journal of China University of Mining and Technology, 2000, 29(5): 463-467 (in Chinese).

    [22]XUJialin, WANG Xiaozhen, LIU Wentao, et al. Effects of primary key stratum location on height of water flowing fracture zone[J]. Journal of Mining and Safety Engineering, 2009, 28(2): 380-385 (in Chinese).

    [23]XU Jialin, ZHUWeibing, WANG Xiaozhen. New method to predict the height of fractured water-conducting zone by location of key strata[J]. Journal of China Coal Society, 2012, 37(5): 762-769 (in Chinese).

    [24]XU Jinpeng, DU Hui. The prevention technology of tectonic type water channel water inrush mechanism[M]. Xuzhou: China University of Mining and Technology Press, 2013: 89-91 (in Chinese).

This Article

ISSN:1005-0094

CN: 11-3247/Q

Vol 24, No. 10, Pages 1146-1153

October 2016

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Article Outline

Abstract

  • 1 Introduction
  • 2 Analysis and detection of water source
  • 3 Water bursting monitoring method in the deep rock mass
  • 4 Threshold value classification and identification criteria of monitoring and warning
  • 5 Measurement point setup of monitoring and warning and results analysis
  • 6 Conclusion
  • References