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论文中文题名:

 孟村煤矿基岩段冻结壁形成规律研究    

姓名:

 赵望希    

学号:

 201309487    

学科代码:

 085213    

学科名称:

 建筑与土木工程    

学生类型:

 硕士    

学位年度:

 2016    

院系:

 建筑与土木工程学院    

专业:

 建筑与土木工程    

第一导师姓名:

 奚家米    

论文外文题名:

 Study on the forming regularity of the bedrock section frozen wall of Mengcun coal mine    

论文中文关键词:

 温度场 ; 冻结壁 ; 室内试验 ; 数值模拟 ; 现场监测    

论文外文关键词:

 Temperature field ; Frozen wall ; Field monitoring ; Laboratory test ; Numerical simulation    

论文中文摘要:
随着我国中东部地区煤炭资源的枯竭,煤炭资源开采逐步向西部发展,而西部地区井筒需要穿越深厚富水岩层,多采用冻结法凿井。随着冻结法施工井筒数量的不断增多,科技工作者针对基岩冻结力学特性、冻结壁厚度、井壁防渗水等方面开展了大量的研究。但专门针对基岩热物理特性和冻结壁温度场研究工作较少,研究成果不能很好地满足工程需求。目前,冻结壁厚度过大、部分井筒内部岩石冻实使得掘进难度增加,冻结成本过高等现象时有发生。因此,开展基岩冻结壁形成规律研究,进而合理控制冻结时间、冻结强度和选取合适的开挖时间,论文研究具有重要的现实意义。 本文以陕西彬长煤业孟村煤矿主、副井井筒冻结工程为背景,采用室内试验、现场实测与数值模拟相结合的方法,对该矿井主要岩层的热物理特性及冻结壁形成规律开展了研究。通过室内试验,对砂质泥岩、砂岩等五种岩石不同含水状态下的热物理参数(热传导系数、比热容)进行了测试,分析了不同岩石、同一岩石不同含水率条件下热物理特性差异性,分析热物理参数值与含水率、冻结温度的影响关系。在室内试验的基础上,分别对该矿井主要岩层积极冻结期、维护冻结期冻结壁形成、发展规律进行了数值模拟。通过模拟,得到了五种岩层的冻结壁温度场云图、温度场变化规律及冻结速率,实现了冻结壁交圈时间预判。通过对测温孔、井帮温度现场实测数据分析,获得了主要岩层冻结特性参数,分析了冻结壁温度场分布特性和冻结壁形成规律。将模拟结果与现场实测数据进行对比分析,验证了数值模拟模型可靠性,并对今后地质条件相似矿井冻结设计、施工提出了合理建议。
论文外文摘要:
With the exhaustion of the eastern region of our country coal resources, exploitation of coal resources gradually to the west development, and wellbore in the western region need through the deep rock stratum with rich water, the freezing method of shaft sinking. With the increase of the number of construction shaft by freezing method, the scientific and technical workers have carried out a lot of research on the mechanical properties of bedrock freezing, the thickness of the frozen wall and the seepage prevention of the borehole wall. But specialized for bedrock thermal physical properties and temperature field of frozen wall and there are few research work, the research results can not be good to meet the requirements of engineering, currently frozen wall thickness, rock internal parts of the wellbore freeze from the fact that tunneling increases the difficulty of freeze cost high. Therefore, it is of great practical significance to study the formation law of the frozen wall of the bedrock, and then to control the freezing time, the strength of the freezing and the selection of the appropriate excavation time. This paper to Shaanxi Binchang coal industry Mengcun coal mine main and auxiliary shaft freezing engineering as the background, combining with laboratory test, field test and numerical simulation method, on the main mine rock thermal physical properties and frozen wall forming was studied. Through the indoor experiment, sandy mudstone, sandstone and other five kinds of rock with different water condition of thermal physical parameters (thermal conductivity, specific heat capacity) were tested analysis the different rock, with a rock with different water rate under the condition of thermal physical properties difference, the establishment of the thermal physical parameters value and moisture content, freezing temperature relationship of expression. On the basis of laboratory tests, the formation and development of the main rock strata in the mine are frozen and maintained, and the formation and development of the frozen wall are simulated. Through simulation, the temperature field and the change law of temperature field and the freezing rate of the five layers of the frozen wall are obtained. Based on the data analysis of temperature field and temperature field, the main rock stratum freezing characteristic parameters are obtained, and the distribution characteristics of temperature field and the formation law of freezing wall are analyzed. The simulation results and the field measured data were compared and analyzed, which verified the reliability of the numerical simulation model, and put forward reasonable suggestions for the design and construction of similar mine freezing in the future.
中图分类号:

 TD265.3    

开放日期:

 2016-06-18    

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