Study On Disaster-Causing Mechanism Of Coal Mine Flood

Mine water disaster is a major security problem exists in most coal mines in our country, and is also a long difficult to solve a major problem in the coal mine. In view of the diversity of types of coal mine water disasters and the complexity of the disaster mechanism, this paper selects containing roof aquifer(body) flood, floor confined water disaster and old empty water disaster three which has some hidden type of water disaster, and the corresponding to Yu Hua Coal Mine in Shaanxi Province, Dong Jiahe mine and mine north as the concrete object of study,around the top and bottom rock and mined out area across the water coal pillar mining destruction due to water inrush induced and research.In the study of mechanism of roof aquifer water: with Yu Hua Coal Mine as an example, analysis the inrush of water features and inrush conditions and make 1412 working face for geological prototype, using UDEC software of simulated No. 4-2 coal seam in mining process of overlying strata collapse deformation falls, abscission layer growth and the flowing water flowing fractured zone development. At the same time, using the key layer theory specific analysis of roof bed separation space development guide position and water flowing fractured zone highest growth layer. The induced water disaster, disaster causing channel and induced disaster process from three aspects of a comprehensive analysis of the coal seam roof containing layer(body) of disaster causing mechanism, and proposes the method to predict the roof abscission layer of water.In bottom of confined water the mechanism research: with Dong Jiahe coal mine as an example, analyze the characteristic of coal floor aquifer and water inrush medium condition, and in 22507 working face, for geological prototype, use FLAC3 D to simulate 5# coal seam working face advance distance and different under the different coal seam buried depth and different working face length vertical floor strata stress changes, vertical displacement and plastic zone distribution, comprehensive analysis to determine the base plate of the maximum damage depth. The mechanism of disasters were summarized from the water caused by disasters,the channel to disaster and the process.In old empty water hazard-formative mechanism research: with Jian Bei coal mine as an example, from the water filling water, water channel and the water filling space analysis in three aspects: the mechanism for the formation of a plate of goaf water district, and establish the built north coal mine goaf water dynamic model is expected to a plate area. Be from the water, to channel and to process are summarized in three aspects: the mechanism of goaf water and alleys and return air and return air along the trough of 101 face interval water security coal pillar is evaluated, for one, a panel of three water reasonable coal pillar width were determined.This paper of coal mine water disaster by disaster mechanism study, the multiple simulation experimental results and theoretical analysis results and the measured results are verified. The conclusions have certain reliability. Hope to provide some technical reference on the future development of various types of coal mine water disaster prevention and control measures.