本文選題：數(shù)值模擬　切入點：露天轉(zhuǎn)地下　出處：《北方工業(yè)大學(xué)》2015年碩士論文

【摘要】：眾所周知,任何礦山巖體工程開挖系統(tǒng)都不是一次完成的,而是多步驟累次完成的,對井工與露天聯(lián)合開采條件下的礦山更是如此。在礦山開采過程中,其地質(zhì)工程環(huán)境、結(jié)構(gòu)、載荷、應(yīng)力場分布時刻都在變化之中,即為動態(tài)變化系統(tǒng)；本文以北京云冶礦業(yè)有限責(zé)任公司的開采實踐為基礎(chǔ),依據(jù)兩種開采的空間對應(yīng)關(guān)系、兩種采動影響域相互重疊或包含的特點對聯(lián)合開采的“空間屬性”進行研究,并取得了如下成果： (1)在露天轉(zhuǎn)地下開采形成的采動影響作用下,露天邊坡恰好位于地下采動影響域內(nèi),致使兩種采動影響域中的一部分相互重疊,由此造成了兩種采動效應(yīng)相互作用、相互疊加和相互影響,從而構(gòu)成復(fù)合疊加效應(yīng),使得邊坡巖體的變形與破壞模式完全不同于單一露天采動效應(yīng)下巖體變形問題。針對此情況,系統(tǒng)對在露天轉(zhuǎn)地下過程中不同開挖量對上覆巖體及周圍環(huán)境影響進行了模擬,揭示了露天轉(zhuǎn)地下開采中地表沉陷的移動規(guī)律及并確定了上覆巖體環(huán)境影響范圍。 (2)通過數(shù)值模擬分析了Ⅶ-Ⅶ剖面應(yīng)力應(yīng)變的動態(tài)變化,確定了露天轉(zhuǎn)地下開采不同開采量對上覆巖體影響的移動規(guī)律。 (3)應(yīng)用臨界滑移場法和極限平衡法對自然邊坡與復(fù)合邊坡的穩(wěn)定性進行了預(yù)測分析,并確定對應(yīng)邊坡的穩(wěn)定系數(shù)。 (4)針對密云礦區(qū)的地質(zhì)條件及相應(yīng)的周圍環(huán)境,對Ⅶ-Ⅶ剖面露天轉(zhuǎn)地下開采Ⅶ-Ⅶ剖面及整個上峪礦區(qū)的地表危險區(qū)域進行界定；并對在上峪采場露天轉(zhuǎn)地下開采過程中,其深部礦體開采將誘發(fā)自然山體的滑坡,需要采取相應(yīng)的防控措施達(dá)到礦山安全生產(chǎn)的目的。
[Abstract]:As we all know, the excavation system of rock mass engineering in any mine is not completed in one time, but is completed time by step, especially in the mine under the condition of combined mining of well workers and open pit. In the process of mining, its geological engineering environment, The distribution of structure, load and stress field is changing at all times, that is, dynamic change system. This paper bases on the mining practice of Beijing Yunye Mining Co., Ltd., according to the spatial corresponding relationship between the two kinds of mining. The "spatial attributes" of joint mining are studied by overlapping or including characteristics of the two kinds of mining impact areas, and the following results are obtained:. (1) under the influence of open pit to underground mining, the open-pit slope is located in the underground mining impact zone, which results in the overlap of some of the two mining effects, which results in the interaction between the two mining effects. The deformation and failure mode of the slope rock mass is completely different from the rock mass deformation problem under the single open-pit mining effect because of the superposition and mutual influence of each other, so that the composite superposition effect is formed. The effects of different excavations on the overlying rock mass and its surrounding environment are simulated in the process of open-pit to underground mining. The movement law of the surface subsidence and the influence range of the overlying rock mass environment are revealed in the process of open-pit to underground mining. (2) the dynamic change of stress and strain in section 鈪，

本文編號：1671989