五沟煤矿副井井筒破裂机理及治理技术的研究

发布时间：2018-05-21 02:28

本文选题：立井井筒 + 水位下降　；参考：《安徽理工大学》2015年硕士论文

【摘要】：煤矿立井井筒破坏是一种特殊类型的工程地质灾害,是人类采矿活动和地质环境相互作用的结果。本文在前人研究成果的基础上,通过理论分析与FLAC3D数值模拟,对五沟煤矿副井井筒的破裂机理与治理技术进行了研究。主要研究工作为： (1)通过对五沟煤矿实际工程地质与水文地质的总结分析,结合立井井筒破坏的相关理论,对五沟煤矿副井井筒破坏的发生机理进行了理论分析研究； (2)基于五沟煤矿副井的工程地质模型,建立了副井的数值模拟计算模型,运用大型有限差分软件FLAC3D,基于太沙基有效应力原理,对四含水位下降的附加应力场和位移场数值模拟,并最终拟合出井壁最大附加竖直应力和四含水位下降之间的变化关系公式； (3)根据有关破裂井壁治理技术经验,实施了井筒注浆加固、开设卸压槽和架设井圈的治理技术,实现了对立井井壁竖直附加应力的有效缓解,治理效果良好。
[Abstract]:Shaft failure of coal mine shaft is a special type of engineering geological disaster, which is the result of the interaction between human mining activities and geological environment. Based on the previous research results, this paper studies the fracture mechanism and treatment technology of auxiliary shaft in Wugou coal mine by theoretical analysis and FLAC3D numerical simulation. The main research work is: 1) through summing up and analyzing the actual engineering geology and hydrogeology of Wugou coal mine, combining with the relevant theory of shaft failure, the mechanism of shaft failure of auxiliary well in Wugou coal mine is analyzed and studied theoretically. Based on the engineering geological model of the auxiliary well in Wugou Coal Mine, the numerical simulation model of the auxiliary well is established. The numerical simulation of the additional stress field and displacement field of the four water level drop is carried out by using the large-scale finite-difference software FLAC3D and based on the effective stress principle of Terzaghi. Finally, the formula of the relationship between the maximum additional vertical stress of the shaft wall and the decline of the four-bearing water level is obtained. 3) according to the experience in the treatment of fractured shaft wall, the treatment technology of wellbore grouting reinforcement, opening pressure relief tank and setting up well ring is carried out, which can effectively alleviate the vertical additional stress of vertical shaft wall, and the treatment effect is good.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD262;P694

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