通风条件下竖井冻结壁解冻规律研究

发布时间：2018-05-25 01:23

本文选题：通风 + 竖井　；参考：《中国矿业大学》2017年硕士论文

【摘要】：近几年矿井建设深度越来越大,所穿越的地层也越来越复杂,此时冻结法成为复杂条件下竖井施工的首选工法,目前正在施工的山东万福煤矿就是采用冻结法顺利完成了主、副、风井三个竖井的施工。本文以万福煤矿主井为依托,研究了通风条件下竖井冻结壁的解冻规律。本文考虑的影响冻结壁解冻的因素有通风温度、相对湿度、通风速度、土性、初始地温和通风深度,通过数值模拟和物理试验两种方法研究了冻结壁的在解冻过程中温度场变化情况,并通过计算得到了典型参数条件下通风800天过程中为井下提供的冷量,以及在整个通风过程中井壁和冻土体温度场发展变化情况;通过单因素试验和多因素正交试验得到了各个因素对冻结壁解冻的影响规律及其显著性大小。将物理试验得到的结果与数值模拟结果进行对比分析,验证了两种方法的准确性和可靠性。本文的研究成果可为冻结壁融化后期壁后注浆和冻结壁内的冷量利用提供理论依据。
[Abstract]:In recent years, the depth of mine construction is getting deeper and deeper, and the strata passed through are becoming more and more complex. At this time, the freezing method has become the preferred method for shaft construction under complex conditions. At present, the Shandong Wanfu Coal Mine, which is under construction, has successfully completed the main project by using the freezing method. The construction of three shaft shafts. Based on the main shaft of Wanfu Coal Mine, the thawing law of freezing wall of shaft under ventilation condition is studied in this paper. The factors that influence the thawing of freezing wall are ventilation temperature, relative humidity, ventilation speed, soil property, initial ground temperature and ventilation depth. The variation of temperature field in thawing process of freezing wall is studied by numerical simulation and physical test, and the cooling amount provided for downhole during 800 days of ventilation under typical parameters is obtained by calculation. Through single factor test and multi-factor orthogonal test, the influence of each factor on thawing of freezing wall and its significance are obtained. The accuracy and reliability of the two methods are verified by comparing the results of physical experiments with the results of numerical simulation. The research results in this paper can provide a theoretical basis for post-wall grouting and cold volume utilization in the late thawing of frozen wall.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD265.3

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