本文選題：崩落法轉(zhuǎn)充填采礦法 + 隔離礦柱穩(wěn)定性��； 參考：《貴州大學(xué)》2016年碩士論文

【摘要】：充填采礦法取代崩落采礦法有利于礦區(qū)環(huán)境保護(hù)以及減少尾礦庫(kù)庫(kù)容告急帶來(lái)的問(wèn)題。為保證崩落法順利向充填法轉(zhuǎn)型,在崩落法和充填法過(guò)渡段之間設(shè)置隔離礦柱,并確定隔離礦柱最優(yōu)安全厚度以確保過(guò)渡段采區(qū)的穩(wěn)定性,是實(shí)現(xiàn)安全轉(zhuǎn)型的關(guān)鍵。所以,開(kāi)展崩落法轉(zhuǎn)充填法采場(chǎng)隔離礦柱穩(wěn)定性研究具有重要的實(shí)際意義。本文以大冶市金山店鐵礦張福山礦區(qū)西區(qū)為工程背景,采用物理試驗(yàn)、理論分析、工程類(lèi)比和數(shù)值模擬分析方法等多種手段對(duì)崩落法轉(zhuǎn)充填法采場(chǎng)隔離礦柱穩(wěn)定性進(jìn)行了研究。主要研究?jī)?nèi)容如下:(1)首先通過(guò)現(xiàn)場(chǎng)調(diào)研收集資料分析了礦山開(kāi)采現(xiàn)狀與采區(qū)礦巖的特性;結(jié)合力學(xué)試驗(yàn)確定礦巖力學(xué)參數(shù);結(jié)合采場(chǎng)開(kāi)采實(shí)際,確定了影響隔離礦柱穩(wěn)定性的主要因素為隔離礦柱厚度H、采空區(qū)跨度B、隔離礦柱下方支撐間柱寬度W和充填體特性。(2)采用理論分析法確定了與隔離礦柱穩(wěn)定性相關(guān)的參數(shù)。綜合分析表明,與隔離礦柱穩(wěn)定性相關(guān)的采場(chǎng)合理參數(shù)理論值為:采空區(qū)跨度8~12m,隔離礦柱厚10~16m。(3)在理論分析基礎(chǔ)上,基于FLAC3D數(shù)值模擬軟件,建立了過(guò)渡段在隔離礦柱下方礦體回采和采空區(qū)充填兩個(gè)過(guò)程的三維數(shù)值模型,分析了研究區(qū)域位移、應(yīng)力、塑性區(qū)的變化規(guī)律。通過(guò)理論分析和數(shù)值模擬,最后得到了影響隔離礦柱穩(wěn)定性的最小安全厚度為14m,采空區(qū)跨度為8m,支撐間柱寬度為10m。通過(guò)金山店鐵礦崩落法轉(zhuǎn)充填法采場(chǎng)隔離礦柱穩(wěn)定性研究,確定了隔離礦柱合理設(shè)計(jì)參數(shù),為礦山生產(chǎn)提供了重要的技術(shù)支撐。
[Abstract]:Replacing caving mining with filling mining method is beneficial to the environmental protection of mining area and reducing the problems caused by tailing reservoir capacity. In order to ensure the smooth transition of caving method to filling method, it is the key to realize the safe transition by setting isolating pillar between caving method and filling method transitional section, and determining the optimum safe thickness of isolated pillar to ensure the stability of mining area in transition section. Therefore, it is of great practical significance to study the stability of stope isolation pillar with caving method and filling method. Based on the west of Zhang Fushan mining area of Jinshandian Iron Mine in Daye City, this paper studies the stability of stope isolation pillar by means of physical test, theoretical analysis, engineering analogy and numerical simulation analysis. The main research contents are as follows: (1) firstly, through the field investigation and data collection, the paper analyzes the present mining situation and the characteristics of the ore rock in the mining area, determines the mechanical parameters of the ore and rock in combination with the mechanical test, and combines with the mining practice in the stope. The main factors affecting the stability of the isolated pillar are the thickness of the isolated pillar H, the span of the goaf B, the width of the supporting column under the isolated pillar W and the characteristics of the backfill. (2) the parameters related to the stability of the isolated pillar are determined by theoretical analysis. The comprehensive analysis shows that the theoretical values of the reasonable stope parameters related to the stability of the isolated pillar are: the span of the goaf is 812m, the thickness of the isolated pillar is 1010m. (3) on the basis of the theoretical analysis, the numerical simulation software FLAC3D is used. A three dimensional numerical model of the two processes of stoping and goaf filling under the separation pillar in the transition section is established, and the variation law of the displacement, stress and plastic zone in the studied area is analyzed. Through theoretical analysis and numerical simulation, the minimum safe thickness of the isolated pillar is 14 m, the span of the goaf is 8 m, and the width of the bracing column is 10 m. By studying the stability of the isolated pillar in the stope by the caving method and filling method in Jinshandian Iron Mine, the reasonable design parameters of the isolated pillar are determined, which provides an important technical support for the mine production.
【學(xué)位授予單位】：貴州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：TD853.34
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本文編號(hào)：2089418