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| FORMATION AND PREVENTION OF WATER INRUSH FROM ROOF BED SEPARATION WITH FULL-MECHANIZED CAVING MINING OF ULTRA THICK COAL SEAM |
| QIAO Wei1，2，HUANG Yang3，YUAN Zhongbang3，GUO Wei3，ZHOU Dankun1 |
(1. School of Resources and Earth Science，China University of Mining and Technology，Xuzhou，Jiangsu 221116，China；
2. Post-doctoral Scientific Research Station，Yankuang Group Company Limited，Zoucheng，Shandong 273500，China；
3. Cuimu Coal Mine，Shaanxi Yonglong Energy Development Construction Co.，Ltd.，Baoji，Shaanxi 721501，China) |
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Abstract A water inrush case upon roof bed separation of the ultra thick coal seam during the full-mechanized caving mining was analyzed. The types of water inrush in bed separation were summarized and the mechanism of formation of the hydrostatic water inrush in roof bed separation of a mining face was discussed. The possible separation locations in the studied area were calculated. The method of prevention of water inrush from roof bed separation was introduced in detail. Proposed drill holes penetrating through up to ground surface drained the water in the separation effectively. The relationships between the mining height and the water inrush from the separation，and the relevance of the mining rate and the water yield in the separation were studied.
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Received: 17 February 2014
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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 
