二矿矸石堆地震响应及稳定性数值分析

发布时间：2018-02-22 11:31

  本文关键词： 矸石堆 抗震 LS-DYNA 稳定性　出处：《中国地质大学(北京)》2017年硕士论文　论文类型：学位论文

【摘要】：山西是中国煤矿产业的核心省份,在产出大量煤矿的同时,也产出了相应的副产物,煤矸石。煤矸石是在开采煤矿的时候产生的矿业固体废物,这些固体废物目前的综合利用率还很低,除了回收作为路基材料、发电、制造建筑材料以外,最主要的处理方式还是就近堆积加固成为人工堆积体。但是这些堆积体并未考虑到地震等地质灾害的因素。如果这些矸石堆没经加固处理,在发生自燃、暴雨、地震的时候,往往就会发生失稳,对矸石堆影响区域范围内的建筑物和人们构成生命威胁。本文对阳泉市矿区的19个矸石堆进行了对比,选出相对危险的矸石堆作为特征矸石堆,然后利用LS-DYNA有限元动力学分析软件对其进行了数值分析研究。通过不同入射角和不同震级的地震波进行对比分析,得出了如下主要结论:(1)位移分布:坡顶的位移、应力在 方向和z方向都比较大,而位移和应力在坡脚处相对较小;并且位移和应力在矸石堆顶部到坡面范围内达到最大,合位移较大值分布在矸石堆顶部至坡面中部范围。(2)位移形态:整体来讲,矸石堆积体内部的应力应变以及产生的位移(前10s的重力加载)为堆积施工过程中矸石堆在自身重力作用下产生的,位移形态为竖向以及向坡面的方向移动。(3)应力分布:由等效应力云图可以看出,最大值点距离矸石堆积体坡面较近。地震震级影响:在抗震烈度为7级～8级(地震荷载为0.1g～0.2g),对矸石堆整体的位移变化影响较小,但是对应力的分布有较大的影响。(4)地震入射角影响:对于目标矸石堆积体来说,最危险的地震入射角度为y方向。
[Abstract]:Shanxi is the core province of China's coal mining industry. While producing a large number of coal mines, it also produces corresponding by-products, coal gangue, which is the mining solid waste produced when mining coal mines. The overall utilization rate of these solid wastes is still very low, except for recycling as subgrade materials, generating electricity and making construction materials. The most important way to deal with it is to reinforce the nearby piles into artificial accumulations. However, these deposits do not take into account the factors of geological disasters such as earthquakes. If the gangue piles are not reinforced, when spontaneous combustion, heavy rain, earthquakes occur, This paper compares 19 gangue heaps in Yangquan mining area, and selects the relatively dangerous gangue piles as characteristic gangue heaps, which often cause instability and threaten the lives of buildings and people in the area affected by gangue heaps, this paper compares the 19 gangue heaps in Yangquan mining area, and selects the relatively dangerous gangue heaps as characteristic gangue heaps. Then the numerical analysis is carried out by using the LS-DYNA finite element dynamic analysis software. By comparing and analyzing the seismic waves with different incident angles and different magnitude, the main conclusions are as follows: the displacement of the slope top, the displacement of the slope top, The stress is larger in the direction and z direction, but the displacement and stress are relatively small at the foot of the slope, and the displacement and stress reach the maximum in the range from the top of the gangue pile to the slope. Large value of combined displacement is distributed from the top of the gangue pile to the middle of the slope.) displacement pattern: as a whole, The stress and strain inside the gangue accumulation and the resulting displacement (the first 10 seconds of gravity loading) are produced by the gangue pile under the action of its own gravity during the stacking construction. The displacement pattern is vertical and moving towards the slope. 3) stress distribution: from the equivalent stress cloud diagram, we can see, The maximum value point is close to the slope of gangue accumulation body. The influence of earthquake magnitude: when the seismic intensity is magnitude 7 or 8 (the earthquake load is 0.1g / 0.2g / g), it has little effect on the whole displacement of gangue pile. But it has a great influence on the distribution of stress. 4) the incidence angle of the earthquake is y direction for the target gangue accumulation.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD849.5;TU435
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本文编号：1524301