论文中文题名: | 新庄煤矿风立井冻结壁与井壁相互作用研究 |
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学号: | 201109374 |
保密级别: | 公开 |
学科代码: | 081401 |
学科名称: | 岩土工程 |
学生类型: | 硕士 |
学位年度: | 2014 |
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研究方向: | 岩石力学理论与工程应用 |
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论文外文题名: | Research on the Interaction between Frozen Wall and Shaft Lining of Xinzhuang Coal Mine Air Shaft |
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论文外文关键词: | Cretaceous strata Frozen wall Shaft lining Temperature field Stress field I |
论文中文摘要: |
随着我国西部大开发战略的实施,西部地区又掀起了新的一轮建井高潮,而新建的矿井很多都要穿越厚度很大的白垩系岩层,由于对这类地层冻结岩石研究较少也缺乏相应的设计、施工经验,因此有必要对西部地区这类特殊地层开展工程实测并对其相关的冻结设计理论进行研究。
甘肃省新庄煤矿风立井冻结法凿井工程总冻结深度为910m,共穿越白垩系地层653.88m,是国内少有的深部基岩冻结工程,十分具有代表性。本文以新庄煤矿风立井冻结法凿井工程为背景,通过室内试验得出了不同温度下饱水白垩系砂岩的物理力学参数及其随温度的变化规律并和第四系表土的物理力学参数进行了对比;通过对周围岩土体、冻结壁和外层井壁进行弹塑性分析,得到了由初始地应力引起的冻结压力计算公式和卸载状态下冻结壁径向方向的位移公式;运用ANSYS有限元模拟软件对冻结壁与外壁温度场进行了分析,模拟了不同入模温度、浇注时间对“两壁”温度场的影响;通过对新庄煤矿风立井白垩系地层-632m和-841m层位进行现场实测并对实测数据进行整理分析,得出了两个监测水平冻结壁和井壁受混凝土水化热影响的温度场变化规律和外壁所受冻结压力的发展变化规律及其内部环向和竖向钢筋的受力变化规律,并对实测数据和解析解以及数值模拟结果进行了对比验证。
本文通过理论分析、数值模拟和现场实测相结合的方法对新庄煤矿风立井冻结壁与井壁相互作用进行了研究,对该地区冻结法凿井工程中白垩系地层冻结壁与井壁的优化设计和规范施工具有一定的指导意义。
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论文外文摘要: |
With the implementation of the grand development plan of western china, a new round upsurge of shaft building has been developing in the western region where many new mines are through the thickness of cretaceous strata. Due to lacking of study on the freezing rock in this ground and corresponding design and construction experience, So it is necessary to carry out engineering test and study on the relevant design theory of freezing of this kind of special strata in western area.
Xinzhuang coal mine air shaft freezing sinking project in Gansu province is the rare deep bedrock freezing engineering and representative, which the total freezing depth is 910m and through 653.88m cretaceous. This paper is based on the Xinzhuang coal mine air shaft freezing sinking engineering. Physical and mechanical parameters under different temperature and its variation law with temperature of the cretaceous saturated rock are obtained through the indoor experiment, and which is compared with the surface soil layer. The calculation formula of freezing pressure caused by the initial in-situ stress and the and the displacement formula of frozen wall which is under the unloading condition in the radial direction is obtained through the elastic-plastic analysis of the frozen wall, the outer wall and the surrounding rock. The temperature field of frozen wall and shaft lining was analyzed by Using ANSYS finite element simulation software, the different temperature of casting concrete and pouring time influence on the "two wall" temperature field was simulated. Through the actual measurement of Xinzhuang coal mine air shaft of -632m and -841m formations of Cretaceous strata, collection and analysis of the measured data, the temperature field change rule and the development of the freeze pressure variation law of the outer wall and its internal ring and vertical reinforcement stress change rule of the two monitoring cretaceous horizontal freezing wall and wall affected by heat of hydration of concrete is obtained. And the measured data, the analytical solution and the numerical simulation results were compared to verify.
This paper research on the interaction between frozen wall and shaft lining of Xinzhuang coal mine air Shaft through the methods of combining theoretical analysis, numerical simulation and field measurement. It has a certain guiding significance to the optimization design and specification construction of the frozen wall and Shaft Lining of the Freezing method in the Cretaceous strata of this region.
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中图分类号: | TD265.3 |
开放日期: | 2014-06-11 |