本文選題：錦界礦 + 開采沉陷��； 參考：《內(nèi)蒙古科技大學(xué)》2015年碩士論文

【摘要】：礦產(chǎn)資源被大面積開采出來之后，使上覆巖層中各巖層中的應(yīng)力平衡狀態(tài)被打破，從而引起上覆巖層的持續(xù)性的移動(dòng)及破壞，最終巖層中的應(yīng)力重新分布達(dá)到新的平衡。因此，把由于開采引起上覆巖層中產(chǎn)生變形、移動(dòng)、裂隙及冒落等的這種現(xiàn)象稱為“開采沉陷”。“開采沉陷”現(xiàn)象是屬于采動(dòng)過程中的復(fù)雜損傷問題。目前，國(guó)外對(duì)開采沉陷研究的理論比較成熟，國(guó)內(nèi)對(duì)開采沉陷的研究主要集中在中東部礦區(qū)薄松散層及北部厚松散層礦區(qū)，而對(duì)于神東礦區(qū)風(fēng)積沙覆蓋區(qū)的開采沉陷研究涉及較少。 基于神東礦區(qū)錦界礦地質(zhì)資料和其煤巖物理力學(xué)參數(shù)，建立錦界礦開采沉陷數(shù)值模型和覆巖移動(dòng)數(shù)值模型，對(duì)其進(jìn)行分析及研究，揭示出在風(fēng)積沙覆蓋條件下的錦界礦開采沉陷主控因素及其對(duì)地表沉陷的影響規(guī)律，并提出錦界礦地表沉陷預(yù)測(cè)模型和覆巖移動(dòng)規(guī)律，為錦界礦預(yù)測(cè)地表沉陷、安全開采及其地面保護(hù)提供參考依據(jù)。 本文主要采用層次分析法（AHP）、正交試驗(yàn)、方差分析、線性回歸，以及3DEC和FLAC3D數(shù)值模擬軟件進(jìn)行綜合分析及研究，主要的內(nèi)容有以下幾個(gè)方面： （1）收集錦界礦有關(guān)資料，在勘察隊(duì)取得巖芯并加工成標(biāo)準(zhǔn)試樣，，通過試驗(yàn)得錦界礦的煤巖物理力學(xué)參數(shù)； （2）根據(jù)錦界礦地質(zhì)資料，采用層次分析法（AHP）篩選出錦界礦開采沉陷的主控因素（松散層厚度、采高和覆巖綜合硬度）； （3）根據(jù)錦界礦31106綜采工作面圖和Jb203-1鉆孔柱狀圖，基于正交試驗(yàn)建立錦界礦礦開采沉陷數(shù)值模型，并采用方差分析法和線性回歸分析法得出了在多因素共同作用下錦界礦開采沉陷主控因素的敏感性及其對(duì)錦界礦開采沉陷規(guī)律的影響。根據(jù)錦界礦地質(zhì)資料及主控因素建立錦界開采沉陷預(yù)測(cè)模型。 （4）通過對(duì)錦界礦覆巖移動(dòng)數(shù)值模擬研究，得出錦界礦31106工作面的上覆巖層是復(fù)合單一關(guān)鍵層。對(duì)于上覆巖層來說，其移動(dòng)是非線性的；下沉量和下沉范圍與距煤層頂板的距離有關(guān)，距離越近其下沉量和下沉范圍就越大。覆巖移動(dòng)不僅與距直接頂?shù)木嚯x有關(guān)，還與各巖層的巖性、厚度以及關(guān)鍵層結(jié)構(gòu)與位置有關(guān)。 研究結(jié)果為錦界礦工作面的安全生產(chǎn)及地表沉陷預(yù)測(cè)、防治提供一定指導(dǎo)和依據(jù)。
[Abstract]:After the mineral resources are mined out in a large area, the stress equilibrium state in the overlying strata is broken, which leads to the continuous movement and destruction of the overlying strata, and finally the stress redistribution in the overlying strata reaches a new equilibrium. Therefore, the phenomenon of deformation, movement, fissures and caving in overlying strata caused by mining is called "mining subsidence". The phenomenon of mining subsidence is a complex damage problem in mining process. At present, the theory of mining subsidence research abroad is relatively mature. The domestic research on mining subsidence mainly focuses on the thin loose layer in the central and eastern mining area and the thick loose layer mining area in the north. However, there is little research on the mining subsidence in the aeolian sand overlying area of Shendong mining area. Based on the geological data and physical and mechanical parameters of coal and rock, a numerical model of mining subsidence and a numerical model of overlying rock movement in Jinjie mining area are established, and the models are analyzed and studied. This paper reveals the main controlling factors of mining subsidence in Jinjie mine under the condition of eolian sand cover and its influence on surface subsidence, and puts forward the prediction model of surface subsidence and the law of overlying rock movement in Jinjie mine, which is the prediction of surface subsidence of Jinjie mine. Safety mining and its surface protection provide reference basis. In this paper, the analytic hierarchy process (AHP), orthogonal test, ANOVA, linear regression, 3DEC and FLAC3D numerical simulation software are used to analyze and research. The main contents are as follows: 1) collecting the relevant data of Jinjie Mine, obtaining the core from the investigation team and processing it into a standard sample, and obtaining the physical and mechanical parameters of the coal and rock of the Jinjie Mine through the test; (2) according to the geological data of Jinjie mine, the main controlling factors of mining subsidence (thickness of loose layer, mining height and comprehensive hardness of overburden rock) are screened by analytic hierarchy process (AHP); According to the 31106 fully mechanized mining face map and Jb203-1 borehole histogram of Jinjie Coal Mine, a numerical model of mining subsidence in Jinjie Mine is established based on orthogonal test. By means of variance analysis and linear regression analysis, the sensitivity of the main factors controlling the mining subsidence of Jinjie mine and its influence on the law of mining subsidence of Jinjie mine are obtained under the joint action of many factors. Based on geological data of Jinjie mine and main controlling factors, a prediction model of mining subsidence in Jinjie is established. 4) through numerical simulation of overlying rock movement in Jinjie Mine, it is concluded that the overlying strata in 31106 face of Jinjie Coal Mine is a single complex key layer. For the overlying strata, its movement is nonlinear, and the subsidence amount and subsidence range are related to the distance from the coal seam roof, the closer the distance is, the larger the subsidence amount and subsidence range will be. The overburden movement is not only related to the distance from the direct top, but also to the lithology, thickness, structure and location of the key strata. The results provide some guidance and basis for safety production and surface subsidence prediction in Jinjie Coal Mine.
【學(xué)位授予單位】：內(nèi)蒙古科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD325

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本文編號(hào)：1918427