【摘要】：露天礦邊坡滑坡的問題，其根本原因就是邊坡穩(wěn)定性出現(xiàn)了問題。如果遇到穩(wěn)定性問題卻不將其放在排土場設計和開采生產之前解決，這將給礦山生產帶來極大的技術安全問題甚至出現(xiàn)安全事故，對邊坡穩(wěn)定性問題的重視程度在國內外都得到了充分體現(xiàn)。多年來通過大量的實例與理論相結合的研究，形成了趨于成熟的，且針對邊坡實際問題具有很高的使用價值的邊坡穩(wěn)定性分析概論和方法。但是，因為任何一個露天礦邊坡都是不可復制的，露天礦的不同其本身也必將具有不同的特點，所使用的分析方法也是不同的。針對黑岱溝露天礦陰灣排土場發(fā)生的滑坡事件，在相關文獻資料以及與黑岱溝礦坑周邊4個外排土場——北排、西排、東排和東沿幫排土場，1個內排土場條件的對比為依托下初步確定其滑坡主要影響因素為水的影響并對此展開課題研究，內容如下： 通過對以往資料的查閱和實習期間的現(xiàn)場實地考察，由于2013年采場轉向，陰灣排土場承擔著較大的剝離外排量，另陰灣南部力量煤業(yè)排水長期浸泡陰灣排土場基底，導致基底承載力驟減，影響了排土場穩(wěn)定性。 利用工程地質鉆探取得滑坡區(qū)域巖土試樣進行室內巖土物理力學試驗。通過室內試驗和反分析綜合研究，確定了滑帶土的抗剪強度指標。通過工程地質、水文地質條件及巖土物理力學綜合分析，基本確定陰灣滑坡的成因。 通過反分析所得物理力學參數利用SLOPE/W計算陰灣剖面YW—1、YW-2、YW-3邊坡安全系數，，由此確立以YW—1剖面為主要研究對象。 提出采用排土壓腳的方法對陰灣排土場進行治理，用壓腳法增加邊坡下部區(qū)域排棄物的自重，使滑坡區(qū)域的抗滑力從整體上增加；提出分別壓腳至標高+1170m平盤和+1200m平盤兩種方案，選取典型剖面后利用極限平衡分析法，計算兩種方案壓腳之后各自排土場穩(wěn)定性變化如何。 在壓腳排土區(qū)域設置地面防排水系統(tǒng)。設計采用“截、排、蓄、抽”四位一體的綜合防排水體系�；诶窭嗜诊@式差分（FLAC）有限差分方法，根據陰灣排土場工程地質模型，排棄物采用摩爾—庫倫模型，邊坡組成成分采用理想的彈塑模型來描述，坡傾向長度為560m，邊坡垂直最高高度為135m建立FLAC3D計算模型對排土場邊坡治理后的穩(wěn)定性進行數值分析。
[Abstract]:The fundamental cause of slope landslide in opencast mine is the problem of slope stability. If the stability problem is not solved before the dump design and mining production, it will bring great technical safety problems and even safety accidents to the mine production. The degree of attention to slope stability has been fully reflected both at home and abroad. Over the years, through the research of a large number of examples and theories, an introduction and method of slope stability analysis have been formed, which tend to be mature and have high practical value for slope problems. However, because any open pit slope can not be duplicated, the different open-pit mine itself must have different characteristics, and the analytical methods used are also different. In view of the landslide event in Yingwan dump of Heidaigou opencast mine, the relevant documents and 4 external dump sites around Heidaigou mine pit are as follows: North row, west row, east row and eastern side dump. Based on the comparison of the conditions of an internal dump, it was preliminarily determined that the main influencing factor of the landslide was the influence of water. The contents are as follows: through the reference of the previous data and the on-the-spot investigation during the practice period, Because of the stope turning in 2013, the Yin-Wan dump bears a large amount of stripping out, and the drainage of power coal industry in the southern part of Yin-wan soaks the base of Yin-wan dump for a long time, which results in the sudden reduction of the bearing capacity of the basement and affects the stability of the dump. The rock and soil samples of landslide area were obtained by engineering geological drilling, and the laboratory geotechnical physical and mechanical tests were carried out. The shear strength index of sliding zone soil is determined by laboratory test and inverse analysis. Through the comprehensive analysis of engineering geology, hydrogeological conditions and geotechnical physics and mechanics, the cause of the Yinwan landslide is basically determined. The safety factor of YW-1,YW-2,YW-3 slope in Yinwan profile is calculated by using SLOPE/W through back analysis of physical and mechanical parameters, and the main research object is YW-1 section. It is put forward that the method of draining and pressing feet is used to treat the dumping site in Yinwan, and the deadweight of the discards in the lower part of the slope can be increased by the method of pressing feet, so as to increase the anti-slide ability of the landslide area as a whole. Two schemes, 1170m flat plate and 1200m horizontal plate, are put forward respectively. After selecting typical section, the stability of the dump after pressing foot is calculated by using limit equilibrium analysis method. The ground drainage system is installed in the draining area of the foot. Design of "cut, row, storage, pumping" integrated waterproofing and drainage system. Based on Lagrangian explicit difference (FLAC) finite difference method, according to the engineering geological model of Yin-Wan dump, the mole-Coulomb model is used to describe the discards, the composition of the slope is described by an ideal elastic-plastic model, and the slope inclination length is 560m. The FLAC3D model was established to analyze the slope stability after the treatment of the dump slope with the maximum vertical height of 135m.
【學位授予單位】：內蒙古科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD824.8

【參考文獻】

相關期刊論文 前10條

1 李鐵鋒,潘懋,劉瑞s

本文編號：2296620