發(fā)布時間：2018-02-22 11:31

  本文關(guān)鍵詞： 矸石堆 抗震 LS-DYNA 穩(wěn)定性　出處：《中國地質(zhì)大學(北京)》2017年碩士論文　論文類型：學位論文

【摘要】：山西是中國煤礦產(chǎn)業(yè)的核心省份,在產(chǎn)出大量煤礦的同時,也產(chǎn)出了相應的副產(chǎn)物,煤矸石。煤矸石是在開采煤礦的時候產(chǎn)生的礦業(yè)固體廢物,這些固體廢物目前的綜合利用率還很低,除了回收作為路基材料、發(fā)電、制造建筑材料以外,最主要的處理方式還是就近堆積加固成為人工堆積體。但是這些堆積體并未考慮到地震等地質(zhì)災害的因素。如果這些矸石堆沒經(jīng)加固處理,在發(fā)生自燃、暴雨、地震的時候,往往就會發(fā)生失穩(wěn),對矸石堆影響區(qū)域范圍內(nèi)的建筑物和人們構(gòu)成生命威脅。本文對陽泉市礦區(qū)的19個矸石堆進行了對比,選出相對危險的矸石堆作為特征矸石堆,然后利用LS-DYNA有限元動力學分析軟件對其進行了數(shù)值分析研究。通過不同入射角和不同震級的地震波進行對比分析,得出了如下主要結(jié)論:(1)位移分布:坡頂?shù)奈灰�、應力�?方向和z方向都比較大,而位移和應力在坡腳處相對較小;并且位移和應力在矸石堆頂部到坡面范圍內(nèi)達到最大,合位移較大值分布在矸石堆頂部至坡面中部范圍。(2)位移形態(tài):整體來講,矸石堆積體內(nèi)部的應力應變以及產(chǎn)生的位移(前10s的重力加載)為堆積施工過程中矸石堆在自身重力作用下產(chǎn)生的,位移形態(tài)為豎向以及向坡面的方向移動。(3)應力分布:由等效應力云圖可以看出,最大值點距離矸石堆積體坡面較近。地震震級影響:在抗震烈度為7級～8級(地震荷載為0.1g～0.2g),對矸石堆整體的位移變化影響較小,但是對應力的分布有較大的影響。(4)地震入射角影響:對于目標矸石堆積體來說,最危險的地震入射角度為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.
【學位授予單位】：中國地質(zhì)大學(北京)
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD849.5;TU435
，

本文編號：1524301