摘要
以范各庄煤矿水文地质条件为基础,建立了承压水上采煤的岩体水力学模型,应用岩石破裂过程渗流-应力耦合分析系统(RFPA2D-Flow)模拟分析了范各庄矿12煤层底板开采扰动下,裂隙形成、扩展到突水通道最终贯通形成突水的全过程。通过对损伤区分布、应力场和渗流场的演化分析,揭示了开采扰动及水压驱动下完整泥岩底板由隔水岩层到突水通道的演化过程,对突水通道进行了模拟定位,并对不同水压条件下含水砂岩层对底板突水的影响进行了分析。结果表明:12煤底板突水问题取决于含水砂岩中的水压力,在假设隔水层厚度不变时,水压力与突水系数呈正相关关系,随着水压的增大突水越易发生。该研究为12煤底板突水预测与防治提供了理论依据。
Based on the hydrogeological conditions in Fangezhuang coal mine,the hydraulic model for rock mass in coal mining with confined water was constructed.The author applies coupling system of flow solid in rock failure process analysis to simulate and study the whole process of the initiation of fractures,extension and formation of groundwater inrush pathway.With the analysis of damage distribution,stress and seepage field evolution,the process of the evolution from water-resisting strata to inrush pathway about the floor of complete mudstone under the condition of mining disturbance and hydraulic driving is clearly revealed,and the water rush pathways are determined.Furthermore,the effects of water inrush under different water pressures in sandstone are discussed.The results show that the water inrush of coal seam 12 depends on the pressure of water in sandstone.The water pressure has a positive correlation with water bursting coefficient in the conditions of mudstone thickness,with the increasing water pressure,water inrush becomes easier.This research provides theoretical basis for forecasting and prevention of water inrush from the floor of coal seam 12.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2010年第3期27-31,共5页
Coal Geology & Exploration
基金
国家重点基础研究发展计划(973计划)项目(2007CB209405)
国家自然科学基金项目(50874024
10872046
50904013)
东北大学优秀博士论文培育基金(N090601003)
东北大学创新团队建设项目(N090101001)
关键词
范各庄煤矿
底板突水
突水通道
数值模拟
Fangezhuang coal mine
floor water inrush
water inrush pathways
numerical simulation
