任楼煤矿副井井壁破坏机理与防治技术研究

发布时间：2018-04-26 12:23

本文选题：井筒破坏 + 地面沉降　；参考：《安徽理工大学》2017年硕士论文

【摘要】：深厚表土层中煤矿井筒的变形破坏是黄淮地区普遍存在的一种矿山工程地质灾害,而井筒作为煤矿中最重要的井巷工程,肩负着煤矿整个生产系统的安全保障,其对煤矿的重要性不言而喻。近年来皖北矿区已有多个煤矿出现过非采动条件下不同程度的井筒变形或破坏现象,在给煤矿造成巨大经济损失的同时也给煤矿安全生产带来严重威胁。因而针对井筒的变形破坏这一工程问题开展相应的研究不仅具有理论价值,更具有重要的实际应用意义。临涣矿区任楼煤矿副井井壁自发生变形破坏后已严重干扰煤矿的正常生产。为弄清该矿副井井壁变形破坏机理,并在此基础上给出适当的治理措施,本文先从任楼矿副井变形破坏的特征入手,通过现场实测、理论分析与数值模拟等方法,开展相关研究,取得主要成果如下:(1)基于任楼矿副井周边松散层地质及水文地质条件的研究,分析了工业广场地面水源井取水及地下开采等活动造成的松散含水层水位及工业广场与副井四周地面沉降的变化情况,研究了松散含水层失水与地面沉降二者之间的内在联系,给出了副井井壁变形破坏机理的理论分析;(2)构建了任楼矿副井变形破坏的工程地质模型,借助数值模拟计算的结果,分析了松散层失水与井壁最大竖直附加应力的相关性,并得到了具体的拟合公式。而且数值模拟的研究结果也验证了副井变形破坏机理的理论分析结果;(3)根据井筒变形破坏的已有的治理方法、技术及经验,结合任楼矿副井变形破坏的实际情况,对副井实施了槽钢井圈加固和注浆加固等工程修复的治理措施,有效缓解了井壁竖直附加应力的增大,取得了良好的治理效果。此外,还从矿区水源井的取水区域、取水层位及矿井水资源的利用等角度,提出了防止地层疏水沉降的治本建议。
[Abstract]:The deformation and failure of coal mine shaft in deep topsoil is a kind of mine engineering geological hazard that exists widely in Huang-Huai area. As the most important shaft engineering in coal mine, wellbore shoulders the safety guarantee of the whole production system of coal mine. Its importance to coal mines is self-evident. In recent years, there have been many coal mines in the north of Anhui province that have been deformed or destroyed in different degrees under non-mining conditions, which not only caused huge economic losses to coal mines, but also brought serious threats to the safety of coal production. Therefore, it is not only of theoretical value, but also of important practical significance to study the engineering problem of wellbore deformation and failure. Since the deformation and destruction of the auxiliary shaft wall in Renlou Coal Mine, Linhuan Coal Mine, it has seriously interfered with the normal production of the coal mine. In order to make clear the mechanism of deformation and failure of auxiliary shaft in this mine, and on the basis of this, the paper begins with the characteristics of deformation and failure of auxiliary shaft in Renlou Mine, and through field measurement, theoretical analysis and numerical simulation, etc. The main results obtained are as follows: 1) based on the study of the geological and hydrogeological conditions of the loose layer around the auxiliary well of Renlou Mine, In this paper, the variation of water level of loose aquifer and the ground subsidence around industrial plaza and auxiliary well caused by water intake and underground mining of ground water source well in Industrial Square are analyzed, and the internal relation between loss of water in loose aquifer and ground subsidence is studied. In this paper, the theoretical analysis of deformation and failure mechanism of auxiliary shaft wall is given. The engineering geological model of deformation and failure of auxiliary well in Renlou Mine is constructed. With the help of the results of numerical simulation, the correlation between the loss of water in loose layer and the maximum vertical additional stress of shaft wall is analyzed. The specific fitting formula is obtained. Moreover, the results of numerical simulation also verify the theoretical analysis of deformation and failure mechanism of auxiliary wells. According to the existing methods, techniques and experiences of shaft deformation and failure, combined with the actual situation of deformation and failure of auxiliary wells in Renlou Mine, The treatment measures of channel steel ring reinforcement and grouting reinforcement are carried out for the auxiliary well, which effectively alleviates the increase of vertical additional stress of shaft wall and obtains good treatment effect. In addition, the author puts forward some suggestions to prevent the formation hydrophobic subsidence from the point of view of the area of water intake, the level of water intake and the utilization of mine water resources in the mining area.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD321

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