山西大佛寺旺源煤矿岩溶涌水量数值模拟研究

发布时间：2018-05-30 00:46

本文选题：煤矿带压开采 + 岩溶涌水量　；参考：《太原理工大学》2015年硕士论文

【摘要】：煤炭资源是工业发展的基础，近年来随着工业的发展，煤炭开采量日益增大，导致各地上组煤已基本采空，现在主要开采下组煤，但高压奥灰岩溶地下水对下组煤开采活动具有很大的影响，尤其在山西这种现象非常普遍。本文以山西大佛寺旺源煤矿为例，该地区岩溶水压力较大，水文地质条件复杂，因此必须疏降到安全水位范围内才能开采。本次以该矿下组煤开采的岩溶涌水量为研究对象，以整个洪山泉域为模拟范围。具体思路是：通过大量的野外调查和技术资料的收集，对洪山泉域区域水文地质条件、泉域水均衡要素、岩溶含水层富水性、岩溶介质裂隙发育情况、地质构造、矿井充水方式等因素做了分析，，提出了水文地质概念模型和边界概化方案。同时以此为基础建立了空间双层结构、非均质各向同性、非稳定准三维地下水流系统。利用GMS中各个模块的地下水模拟功能，应用有限差分方法，通过对网格的离散以及初始水头、水文地质参数、边界条件等的确定，通过模型识别和软件的参数反演功能，调试出符合实际的水文地质参数，通过实验水位进行拟合验证，最终建立起符合实际的岩溶涌水量预测模型。10#煤：+500、+450，11#煤：+580、+500、+450为本次预测的5个开采水平,在前述模型基础上，结合煤矿初步设计和开发利用方案以及突水系数的计算确定这5个水平的安全开采水位值和疏降岩溶水量，最终提出几种疏降方案，比较各自疏降时间和疏降水量以及疏降行为对洪山泉域水资源量的影响，为煤矿安全开采下组煤、安排合理的排水设备、保护洪山泉域提供提供科学的依据。
[Abstract]:Coal resources are the basis of industrial development. In recent years, with the development of industry, the amount of coal mining has increased day by day, resulting in the coal mining in various places has basically been emptied. However, the high pressure Ordovician karst groundwater has a great influence on the coal mining activities of the lower formation, especially in Shanxi Province. This paper takes the Dafosi Wangyuan Coal Mine in Shanxi Province as an example. The karst water pressure in this area is high and the hydrogeological conditions are complex, so it is necessary to drop sparsely to the safe water level in order to be mined. In this paper, the karst water discharge of coal mining in the lower formation of this mine is taken as the research object, and the whole Hongshan spring region is taken as the simulation scope. The specific ideas are as follows: through a large number of field investigations and technical data collection, the hydrogeological conditions in the Hongshan spring region, the water balance elements in the spring region, the water-rich karst aquifer, the development of cracks in karst media, geological structure, etc. The hydrogeological conceptual model and boundary generalization scheme are put forward. At the same time, the spatial double layer structure, heterogeneous isotropic, unstable quasi three dimensional groundwater flow system is established. Based on the groundwater simulation function of each module in GMS, the finite difference method is used to determine the initial water head, hydrogeological parameters, boundary conditions, model identification and parameter inversion of software, through the discretization of grid and the determination of initial head, hydrogeological parameters, boundary conditions, etc. The actual hydrogeological parameters are debugged and verified by fitting the experimental water level. Finally, the prediction model of karst water discharge. 10# coal: 500,450,11# coal: 580,500,450 is established, which is the five mining levels predicted in this paper. On the basis of the above model, combined with the preliminary design, exploitation and utilization scheme of coal mine and the calculation of water inrush coefficient, the five levels of safe mining water level value and sparsely reducing karst water quantity are determined. Finally, several schemes are put forward. This paper compares the effects of the time of thinning down, the amount of precipitation and the behavior of thinning on the quantity of water resources in Hongshan spring area, which provides a scientific basis for the safe mining of coal in coal mine, the arrangement of reasonable drainage equipment and the protection of Hongshan spring area.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P641.41

【参考文献】