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煤层采动底板突水演变过程可视化试验平台研制与试验研究 被引量:10
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作者 李杨杨 张士川 +4 位作者 孙煕震 沈宝堂 孙文斌 陈军涛 赵金海 《煤炭学报》 EI CAS CSCD 北大核心 2021年第11期3515-3524,共10页
物理模拟试验可以直观展现底板突水全过程,并可获取采动底板突水灾变演化的多元化信息,成为研究承压水上开采的有效研究手段。对早期研制的深部采动底板突水模拟试验系统的突水流量监测、覆岩柔性加载、水平分级加载和恒压稳流试验舱等... 物理模拟试验可以直观展现底板突水全过程,并可获取采动底板突水灾变演化的多元化信息,成为研究承压水上开采的有效研究手段。对早期研制的深部采动底板突水模拟试验系统的突水流量监测、覆岩柔性加载、水平分级加载和恒压稳流试验舱等4个模块进行了改造,实现了突水水量区域化定量监测、覆岩柔性均布加载、双侧分区域独立加载、大容量恒压供水和全方位的密封等功能。借助改造后的试验系统和研制的非亲水相似模拟材料,以受底板承压水威胁的山东某矿为工程背景,研究了突水通道形成、流量灾变演化、隔水层应力变化等过程。试验结果表明:依据底板可视裂隙的扩展特征,将底板突水划分为横纵向演化阶段、横向周期演化阶段和灾变突水阶段;在第Ⅰ阶段,承压水顶界面主渗区首先产生于开切眼下方且位置不随煤层开采发生变化,随着开采可视裂隙向承压水含水层方向和工作面推进方向扩展,主渗区范围变大且流量显著提高;在第Ⅱ阶段,随煤层开采煤壁下方产生新的裂隙,上一阶段回采产生的裂隙封闭,裂隙扩展呈现周期性变化特征,主渗区流量呈现降低—升高—降低—升高的周期性变化趋势;在第Ⅱ阶段,突水通道形成后,主渗区成为承压水突水的源头,其他区域流量不再发生突变,可将该阶段初期的流量急剧突变特征作为突水预警信息。试验结果不仅对中东部矿区承压水上开采底板突水溃砂过程中裂隙演化、突水流量特征研究提供实验指导,同时也对矿井安全性评价及灾害预测与防治提供参考。 展开更多
关键词 底板突 可视化试验平台 通道演化 区域涌水 灾害预警
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提高涌水区域充填体质量措施浅谈
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作者 宫晗 何晓霞 《金川科技》 2020年第3期6-8,共3页
随着科学技术的飞速发展,采矿技术也在发生着日新月异的变化。在所有的采矿方法中,应用充填采矿技术进行采矿的方法逐渐成为人们关注的焦点。本文主要对井下充填质量存在的问题进行分析,并对涌水区域充填准备及充填过程采取了的措施及... 随着科学技术的飞速发展,采矿技术也在发生着日新月异的变化。在所有的采矿方法中,应用充填采矿技术进行采矿的方法逐渐成为人们关注的焦点。本文主要对井下充填质量存在的问题进行分析,并对涌水区域充填准备及充填过程采取了的措施及实施情况进行分析,探索有效的提高充填质量的方法,以提高井下充填体的质量,为井下安全生产提供条件。 展开更多
关键词 采矿方法 充填质量 区域 措施
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Numerical analysis of water inrush from working-face floor during mining 被引量:21
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作者 ZHU Qing-hua FENG Mei-mei MAO Xian-biao 《Journal of China University of Mining and Technology》 EI 2008年第2期159-163,共5页
Confined water in the Ordovician limestone is one of the hidden troubles that threaten safe production of mines in north China. A numerical model of the key strata was developed. It included the structural characteris... Confined water in the Ordovician limestone is one of the hidden troubles that threaten safe production of mines in north China. A numerical model of the key strata was developed. It included the structural characteristics and mechanical properties of the floor rock at the working face of a particular coal mine. The model was used to predict failure modes and to help establish rules for safe mining above the aquifer. The distribution of deformation, failure and seepage was simulated by using Dilian Mechsoft's Real- istic Failure Process Analysis (RFPA2D) program. The stress distribution, the deformation and the flow vectors were also obtained. The results indicate that: 1) The original balance of the stress and seepage fields is disturbed due to coal mining; and 2) As the working face advances different deformation, or failure, appears in the surrounding rocks, the water-resisting strata in floor may be destroyed and the passage of water from the aquifer into the mine may occur. The combined action of mining stress and water pressure ultimately lead to water inrush from the floor. 展开更多
关键词 water inrush from floor stress field seepage field passageway of water-transmit numerical simulation
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Forecasting water disaster for a coal mine under the Xiaolangdi reservoir 被引量:21
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作者 SUN Ya-jun XU Zhi-min +3 位作者 DONG Qing-hong LIU Sheng-dong GAO Rong-bin JIANG Yu-hai 《Journal of China University of Mining and Technology》 EI 2008年第4期516-520,共5页
Xin’an coal mine, Henan Province, faces the risk of water inrush because 40% of the area of the coal mine is under the surface water of the Xiaolangdi reservoir. To forecast water disaster, an effective aquifuge and ... Xin’an coal mine, Henan Province, faces the risk of water inrush because 40% of the area of the coal mine is under the surface water of the Xiaolangdi reservoir. To forecast water disaster, an effective aquifuge and a limit of water infiltration were determined by rock-phase analysis and long term observations of surface water and groundwater. By field monitoring, as well as physical and numerical simulation experiments, we obtained data reflecting different heights of a water flow fractured zone (WFFZ) under different mining conditions, derived a formula to calculate this height and built a forecasting model with the aid of GIS. On the basis of these activities, the coal mine area was classified into three sub-areas with different potential of water inrush. In the end, our research results have been applied in and verified by industrial mining experiments at three working faces and we were able to present a successful example of coal mining under a large reservoir. 展开更多
关键词 coal mining under surface water water flow fractured zone water inrush of coal mine effective aquifuge forecasting model
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