山区采动地表破坏区识别方法研究

发布时间：2018-07-06 18:11

本文选题：开采沉陷 + 不规则三角网　；参考：《江苏师范大学》2017年硕士论文

【摘要】：我国是煤矿大国,随着地下煤层的开采,地表受到不同程度的破坏,包括前期的连续移动变形和后期的地裂缝、滑坡、泥石流等非连续破坏,严重危及矿区安全生产。因此,对煤层开采下的地表破坏区域进行预测与分析,并自动识别出破坏边界具有十分重要的理论价值和实际意义。本文以山西焦煤矿矿区为研究对象,在实地观测的数据基础上计算得到开采预计参数,结合概率积分模型模拟出开采后的地形,并对该区域点进行预处理。利用弹性力学中的有限元法分析地表拉伸破坏区域,提出一种可以自动识别该破坏区域的边界算法,应用OpenGL动态显示。论文的主要工作和成果如下:1、在进行矿区的地表监测、获取矿区地形、地质参数的基础上,计算开采沉陷预计参数,根据开采沉陷预计参数与概率积分模型,预计地表移动变形值。2、基于格网分区对地表产生形变的大区域进行去重的预处理,并生成研究区凸包边界,由外到内快速生成地表三角网,对按照三角剖分寻找第三点的算法进行改进,优化构网速度。3、利用地表和表土层三角网,根据弹性力学中的有限元法对地表拉伸破坏进行研究,将得到的结果与开采下沉边界进行叠加分析,提取出最终的破坏区域,并按照最大右角原理,提出一种基于断裂三角网的边界自动识别算法。4、利用OpenGL技术,实现开采沉陷区破坏区域的三维可视化模拟。
[Abstract]:China is a big coal mining country. With the mining of underground coal seam, the ground surface is destroyed to varying degrees, including the continuous movement deformation in the early stage and the discontinuous destruction of the ground crack, landslide and debris flow in the later stage, which seriously endangers the safety of production in the mining area. Therefore, it is of great theoretical value and practical significance to predict and analyze the surface damage area under coal seam mining, and to identify the damage boundary automatically. In this paper, the mining prediction parameters are calculated on the basis of the field observation data, and the topography after mining is simulated with the probabilistic integral model, and the preprocessing of the points in this area is carried out. The finite element method in elastic mechanics is used to analyze the surface tensile failure area, and a boundary algorithm is proposed to identify the damage area automatically. OpenGL is used to dynamically display the damage area. The main work and results of this paper are as follows: 1. On the basis of surface monitoring, terrain and geological parameters of mining area, the prediction parameters of mining subsidence are calculated, and the prediction parameters and probabilistic integral model of mining subsidence are calculated. It is estimated that the deformation value of surface movement is. 2. Based on the grid partition, the large area of deformation is pretreated, and the convex hull boundary of the study area is generated, and the triangular net of the surface is generated rapidly from outside to inside. This paper improves the algorithm of triangulation to find the third point, optimizes the speed of constructing net. 3, and studies the surface tensile failure by using the surface and surface triangulation, according to the finite element method in elastic mechanics. The result is superposed with the mining subsidence boundary to extract the final damage area, and according to the principle of maximum right angle, an automatic boundary recognition algorithm based on fault triangle network .4 is proposed, and the OpenGL technology is used. The 3D visualization simulation of the damage area in mining subsidence area is realized.
【学位授予单位】：江苏师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD325

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