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Hydrogeologic Conditions And Evaluation Of The Floor Water Inrush Rish During Mining Of Ⅱ1 Coal Seam In Jiaocun Coal Mine

Posted on:2012-05-01Degree:MasterType:Thesis
Country:ChinaCandidate:W Q YuanFull Text:PDF
GTID:2131330335953362Subject:Hydrology and water resources
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Jiaocun coal mine is located in central of Yanlong coalfield. With the depth of coal mining increasing, the karst floor flood problem become more and more serious. Therefore, exploring and proofing the hydrologic regularity and evaluating the floor water inrush risk during mining are important to the water control work in Jiaocun coal mine.Based on the comprehensive collection of past geological and hydrogeologic data about Jiaocun mine, this paper systematically analyzed and researched the geological and hydrogeological conditions of the newly integrated Jiaocun mine. It analyzed the mine water filling factors, and used the"virtual large diameter well method"and"hydrologic analogy"to predict hydraulic discharge in mine. It judged water-inrush from coal mine water through BP neural network methods, analyzed the factors that affected floor water irruption, researched structural complexity in mine. Through studying the thickness of floor, depth of broken floor and progressive intrusion height, strata combination in floor, we studied water-resisting property of floor . We considered Ordovician karst water is mine main water-inrush water, the factors that affectedâ…¡1 coal floor water irruption mainly includes components, water-resisting property of floor, hydraulic pressure and aquifer water-hearing capability, mine ground pressure, and considered the fault was the main factors affectedâ…¡1 coal floor water-irruption.By used water burst coefficient, we calculated and evaluated water-inrush risk aeeseement ofâ…¡1 coal floor. Considering the thickness of floor, the lithology and combination of water-resisting layer, depth of broken floor, progressive intrusion height, hydraulic pressure and aquifer water-hearing capability those affected water-inrush ofâ…¡1 coal floor, used multi-factor synthetic appraisement to evaluate water-inrush risk assessment ofâ…¡1 coal floor, and divided the water-inrush risk ofâ…¡1 coal floor in mine.
Keywords/Search Tags:geological and hydrogeological conditions, water-inrush of floor, affecting factors, risk assessment
PDF Full Text Request
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