本文關(guān)鍵詞： 過渡段開采 安全礦柱穩(wěn)定性 相離度-灰色關(guān)聯(lián)分析 崩落-充填聯(lián)合采礦法　出處：《武漢科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：崩落法開采導(dǎo)致程潮鐵礦地表大范圍塌陷，塌陷區(qū)隨開采深度增加而擴(kuò)大，程潮鐵礦后期擬采用充填法替代崩落法開采西區(qū)礦體，以減小開采對(duì)礦區(qū)地表環(huán)境的影響。為保證崩落法順利向充填法轉(zhuǎn)型，在崩落法和充填法回采區(qū)之間設(shè)置過渡段。過渡段占有大量的礦石，本文采用理論分析、數(shù)值模擬等方法研究安全、高效回采過渡段礦石的開采方法，并通過程潮鐵礦試驗(yàn)采區(qū)生產(chǎn)檢驗(yàn)開采方法實(shí)用性。 （1）通過分析過渡段開采條件，確定過渡段回采順序，并將過渡段劃分為安全礦柱和充填采區(qū)，其中安全礦柱包括水平安全礦柱和垂直安全礦柱。回采時(shí)，先回采充填采區(qū)，再回采水平安全礦柱，最后回采垂直安全礦柱。 （2）根據(jù)過渡段開采條件，確定采用崩落-充填聯(lián)合采礦法對(duì)過渡段進(jìn)行開采。過渡段水平安全礦柱沿用無底柱分段崩落法回采；垂直安全礦柱采用上向進(jìn)路充填法回采；根據(jù)過渡段充填采區(qū)開采條件，，確定上向水平分層充填法、上向進(jìn)路充填法、分段空?qǐng)鏊煤蟪涮罘槌涮畈蓞^(qū)備選開采方法。選取經(jīng)濟(jì)和技術(shù)方面的8個(gè)主要因素作為評(píng)價(jià)指標(biāo)，采用相離度-灰色關(guān)聯(lián)分析法對(duì)三種備選方法進(jìn)行優(yōu)選，確定過渡段充填開采區(qū)最佳開采方法為分段空?qǐng)鏊煤蟪涮罘ā?（3）分析安全礦柱的穩(wěn)定性，確定安全礦柱的尺寸。采用量綱分析法建立過渡段水平安全礦柱穩(wěn)定性評(píng)價(jià)模型，并采用數(shù)值模擬分析程潮鐵礦過渡段水平安全礦柱穩(wěn)定性，將數(shù)值模擬結(jié)果應(yīng)用于評(píng)價(jià)模型，確定程潮鐵礦水平安全礦柱厚度為17.5m；采用數(shù)值模擬分析過渡段垂直安全礦柱頂部寬度與其穩(wěn)定性的關(guān)系，確定程潮鐵礦垂直安全礦柱頂部寬度取值為25m。 （4）將過渡段開采方法在程潮鐵礦西區(qū)5-1采區(qū)進(jìn)行生產(chǎn)試驗(yàn)，試驗(yàn)結(jié)果表明，試驗(yàn)中過渡段安全礦柱未失穩(wěn)，過渡段礦石回收充分。
[Abstract]:Caving mining results in a large area collapse of Chengchao Iron Mine, and the subsidence area expands with the increase of mining depth. In the late stage of Chengchao Iron Mine, filling method is to be used instead of caving method to exploit the orebody in the western region. In order to reduce the influence of mining on the surface environment of mining area, in order to ensure the smooth transition from caving method to filling method, a transitional section is set up between caving method and filling method return mining area. The transition section occupies a large amount of ore. Numerical simulation and other methods are used to study the method of ore mining in the transition section of safe and high efficiency mining, and to verify the practicability of the mining method in the test mining area of tidal iron ore during the course of mining. 1) by analyzing the mining conditions of the transitional section, determining the recovery sequence of the transitional section, and dividing the transitional section into safe pillar and filling mining area, in which the safe pillar includes horizontal safe pillar and vertical safe pillar. The horizontal safe pillar is mined again, and the vertical safe pillar is finally mined. (2) according to the mining conditions of the transitional section, the combined caving and filling mining method is adopted to mine the transitional section. The horizontal safe pillar of the transitional section is recovered by sublevel caving method without bottom pillar, and the vertical safe pillar is mined by filling method of upward approach. According to the mining conditions of the transitional section filling mining area, the upward horizontal stratified filling method and the upward approach filling method are determined. The subsequent filling method in the sublevel goaf is the alternative mining method in the filling mining area. Eight main factors in economic and technical aspects are selected as the evaluation indexes, and the three alternative methods are selected by using the degree of separation and grey relational analysis method. It is determined that the best mining method in the transitional section filling mining area is the sublevel goaf subsequent filling method. The stability of the safety pillar is analyzed and the dimension of the safe pillar is determined. The stability evaluation model of the horizontal safe pillar in the transition section is established by dimensional analysis, and the stability of the horizontal safe pillar in the transitional section of Chengchao Iron Mine is analyzed by numerical simulation. Applying the numerical simulation results to the evaluation model, the horizontal safe pillar thickness of Chengchao Iron Mine is determined to be 17.5 m, and the relationship between the top width of vertical safe pillar and its stability is analyzed by numerical simulation. It is determined that the top width of the vertical safe pillar of Chengchao Iron Mine is 25 m. The test results show that the safe ore pillar in the transition section is not unstable and the ore recovery in the transition section is sufficient.
【學(xué)位授予單位】：武漢科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD853.36;TD861.1

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