三道沟煤矿一期采空区地表沉陷危险性分析

发布时间：2018-01-05 18:26

本文关键词：三道沟煤矿一期采空区地表沉陷危险性分析　出处：《西安科技大学》2016年硕士论文　论文类型：学位论文

【摘要】：三道沟煤矿位于陕西省府谷县西北部属黄土高原地区,该煤矿采高较大、煤层埋藏深度较浅、煤层上覆基岩较薄,在西部黄土矿区具有典型的代表性。探究其采空区地表沉陷规律,并对其沉陷威胁危险性进行预测分析,对西部黄土地区煤矿开采沉陷规律的研究具有重要的意义。本文以现有开采沉陷理论和采空区稳定性分析方法为指导,以三道沟煤矿85201工作面一期开采区实地观测资料及地质地形资料为依据进行论文的撰写。首先,根据开采过程中收集到的85201工作面观测站相关资料,包括监测点实测数据、矿区地质地形资料、煤层分布以及该煤矿其他基本特点,对以上资料进行整理分析并总结概括三道沟煤矿一期采空区地表移动变形规律。其次,采用解析法、回归分析法和计算机数值模拟法对采空区地表危险性评价指标进行相关计算与结果的分析。在解析法中,采用概率积分法进行预计参数的确定,并结合“三下”采煤规程选取相关系数值;在回归分析法中,介绍了数据缺失问题的解决办法,对地表移动持续时间预计模型进行了线性对数拟合;在数值模拟法中,对煤层深度、煤层厚度以及工作面推进量对地表下沉的影响进行了分析研究。最后,将三种方法得到的结果相结合,对三道沟煤矿一期采空区地表沉陷危险性进行综合预计与分析,并根据分析结论为矿区安全生产、矿区生态环境保护以及地面工程建设提出科学合理的建议。
[Abstract]:Sandaogou Coal Mine is located in the northwest of Fugu County, Shaanxi Province, which belongs to the Loess Plateau area. The mining height of this coal mine is relatively high, the coal seam buried depth is shallow, and the coal seam overlying bedrock is thin. It is typical in the loess mining area in the west of China. The law of surface subsidence in goaf is studied and the danger of subsidence threat is forecasted and analyzed. It is of great significance to study the law of coal mining subsidence in the loess region of western China. This paper is guided by the existing mining subsidence theory and the analysis method of goaf stability. Based on the field observation data and geological topographic data of the first stage mining area of 85201 face in Sandaogou Coal Mine, the paper is written. First of all. According to the relevant data collected in the mining process of 85201 face observation station, including the monitoring data, geological terrain data, coal seam distribution and other basic characteristics of the coal mine. The above data are analyzed and summarized in Sandaogou Coal Mine. Secondly, the analytic method is used to analyze the surface movement and deformation of goaf in the first stage of Sandaogou Coal Mine. Regression analysis method and computer numerical simulation method are used to calculate and analyze the risk evaluation index of goaf surface. In the analytical method, the probability integration method is used to determine the predicted parameters. The correlation coefficient value is selected according to the "three down" coal mining rules. In the method of regression analysis, the solution to the problem of missing data is introduced, and the linear logarithmic fitting of the prediction model of surface movement duration is carried out. In the numerical simulation method, the influence of coal seam depth, coal seam thickness and working face advance on the surface subsidence is analyzed. Finally, the results obtained by the three methods are combined. This paper makes a comprehensive prediction and analysis on the risk of surface subsidence in the first goaf of Sandaogou coal mine, and puts forward scientific and reasonable suggestions for the safety of production in mining area, the protection of ecological environment in mining area and the construction of surface engineering according to the conclusion of the analysis.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD327

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