Investigation on Failure and Water Inrush from Roof of 5th Coal Seam in Fangezhuang Coal Mine
Investigation on Failure and Water Inrush from Roof of 5th Coal Seam in Fangezhuang Coal Mine
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发表时间：
2009
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影响因子：
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通讯作者：
Chen Shi-kuo
中科院分区：
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作者：
Chen Shi-kuo
在研究房各庄煤矿第5煤层顶板水文地质条件的基础上，应用岩石破坏过程分析中的流固耦合系统对第5煤层顶板破坏破坏全过程进行了模拟。通过对破坏分布、应力和顶板渗流曲线的分析，揭示了开采扰动和水力驱动条件下完整泥岩顶板从抗水岩层到涌水通道的演化机理。同时，讨论了泥岩厚度与顶板突水的关系。结果表明：底板上大面积的拉应力和应力集中是造成顶板突水的关键因素。抗水顶板层强度不足以保护煤层，应对泥岩顶板进行加固或留安全柱。
Based on researching into hydro-geological conditions of 5th coal seam roof in Fangezhuang coal mine,the author applies the coupling system of flow solid in rock failure process analysis to simulate the whole process of damage and failure about 5th coal seam roof.With the analysis of damage distribution,stress and the roof seepage curves,the evolution mechanism of the process from water-resisting strata to inrush pathway about the roof of complete mudstone under the condition of mining disturbance and hydraulic driving is clearly revealed.Meanwhile,the relationship between the thickness of mudstone and roof water inrush are discussed.The results show that large area of tensile stress on the proof and the stress concentration is the key factor of water inrush of from roof.The strength of water-resisting roof layer is not enough to protect the coal seam and the roof of mudstone should be reinforced or the safety pillars should be left.