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| DETECTION AND ANALYSIS OF HEIGHT OF WATER FLOWING FRACTURED ZONE IN UNDERWATER MINING |
| GAO Baobin1，2，3，LIU Yunpeng1，3，PAN Jiayu 1，3，YUAN Tian1，3 |
| (1. State Key Laboratory Cultivation Base for Gas Geology and Gas Control，Henan Polytechnic University，Jiaozuo，Henan 454000，China；2. Opening Project of Key Laboratory of Deep Mine Construction，Henan Polytechnic University，Jiaozuo，Henan 454000，China；3. School of Safety Science and Engineering，Henan Polytechnic University，Jiaozuo，Henan 454000，China) |
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Abstract In order to accurately detect the height of water flowing fractured zone in overlying roof strata after the mining face has been mined and ensure that mining underwater is safe and reliable，empirical formula calculation，downhole plugging drilling section water injection(put) crack measurement system and drilling television detecting system are used to detect the development of water flowing fractured zone. Results show that，using the above three methods respectively，the heights of water flowing fractured zone，which are 25.24–36.50，26.83–28.33 and 25.50–29.20 m，are obtained. The results verify that using downhole plugging drilling section water injection(put) crack measurement system to detect the height of water flowing fractured zone is reasonable and reliable，and it not only provides a theoretical support for Sitai coal mining underwater，but also provides reference for other coals to detect water flowing fractured zone.
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Received: 30 April 2013
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LI Botao1, 2, 3, TAN Yuxuan1, LIN Haifei4, 5*, WEI Jianping1, 2, 3, ZHANG Hongtu1, 2, 3, LI Shugang4, 5, WEI Zongyong4, 5, WANG Pei4, LUO Rongwei4, LIU Yanwei1, 2, 3. Mechanical properties and mesoscopic damage evolution of coal under liquid-nitrogen freezing at different initial temperatures[J]. , 2026, 45(6): 1757-1772. |
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2014, Vol. 33 
