【摘要】：無底柱分段崩落法以其安全高效和成本較低的特點,在國內(nèi)外地下礦山開采中應用廣泛。無底柱分段崩落法回采系統(tǒng)中,放出體、松動體、崩落體三個不同形體相互制約,對損失貧化指標產(chǎn)生較大影響。因此研究不同崩落體形態(tài)下放出體的形態(tài),對提高礦石回收率和礦山經(jīng)濟效益有著重要的理論意義和實際價值。在總結前人研究成果的基礎上,結合眼前山鐵礦應用無底柱分段崩落法開采的現(xiàn)狀,采用理論分析、計算機模擬和實驗室實驗等手段,對不同崩落體形態(tài)下放出體的形態(tài)進行了研究,取得了以下成果:1、通過對眼前山鐵礦無底柱分段崩落法放礦的數(shù)值模擬,為實驗室實驗提供了指導作用;通過實驗室放礦實驗,分析了放出礦石量、巖石量隨著出礦次數(shù)的變化規(guī)律,求出了每組實驗的礦石貧化率和回收率,利用標志性顆粒和放出散體圈出了出放出體的形態(tài)。2、運用ANSYS軟件進行了不同崩落體形態(tài)的放礦模擬試驗,直觀再現(xiàn)了無底柱分段崩落法的放礦過程和崩落體內(nèi)不同位置的顆粒的移動過程,統(tǒng)計分析了不同崩落體形態(tài)下放礦過程中顆粒的移動規(guī)律。3、不同崩落體形態(tài)模型下實驗室放礦實驗結果表明:隨著出礦次數(shù)的增加,在達到一定次數(shù)之后,礦石開始貧化,而且,隨著出礦次數(shù)的繼續(xù)增加,礦石貧化率不斷增加,礦巖的混雜也越明顯。4、實驗證明放礦過程中放出體形態(tài)開始時呈現(xiàn)上部小、下部大的形態(tài),隨著放礦的進行,放出體形態(tài)的逐漸變寬,但是上部變寬的速度明顯大于下部變寬的速度,放出體形態(tài)最寬的位置由下部逐漸移動到上部,隨后放出體的形態(tài)呈現(xiàn)出上部大、下部小的形態(tài)。5、通過用放出的礦石和標志性顆�；謴筒煌缆潴w形態(tài)放礦過程中放出體形態(tài)變化圖,得出第二組實驗的放出體形態(tài)與崩落體形態(tài)比較接近的結論。在無貧化放礦條件下,礦石回收率達到52.20%,截止放礦時,礦石的回收率達到了78.28%,為尋找最佳崩落體形態(tài)和優(yōu)化崩落體結構參數(shù)提供了依據(jù)。
[Abstract]:Sublevel caving without bottom pillar is widely used in underground mining at home and abroad because of its safety, efficiency and low cost. In the stoping system of sublevel caving method with no bottom pillar, three different bodies, I. e., releasing body, loose body and caving body, restrict each other, which have great influence on the index of loss and dilution. Therefore, it is of great theoretical significance and practical value to study the forms of the caving body in different caving and falling forms to improve the ore recovery rate and the economic benefit of the mine. On the basis of summing up the previous research results, combined with the present situation of the application of sublevel caving method without bottom pillar in Qianshan Iron Mine, theoretical analysis, computer simulation and laboratory experiments are adopted. The following results are obtained: 1. Through the numerical simulation of sublevel caving of Qianshan Iron Mine without bottom pillar, this paper provides guidance for laboratory experiment; Through laboratory ore drawing experiment, the rule of ore quantity and rock quantity varying with the number of ore drawing are analyzed, the ore dilution rate and recovery rate of each group of experiments are calculated, and the shape of exfoliation is obtained by means of symbolic particles and exhumation particles. 2. The drawing process of sublevel caving method without bottom pillar and the moving process of particles in different positions of caving body were visualized by using ANSYS software. The rule of particle movement in the process of ore dispersal with different caving forms is analyzed statistically. 3. The results of laboratory drawing experiments under different caving shape models show that with the increase of ore drawing times, the ore begins to be depleted after a certain number of times. Moreover, with the increase of ore drawing times, the ore dilution rate increases continuously, and the mixing of ore rocks becomes more obvious. 4. Experimental results show that in the process of ore drawing, the shape of the drawing body is small in the upper part and large in the lower part, and with the ore drawing going on, However, the velocity of the upper part becoming wider is obviously larger than that of the lower part. The widest position of the releasing body is gradually moved from the lower part to the upper part, and then the exfoliating body appears to be larger in the upper part and smaller in the lower part. Based on the recovery of the drawing patterns of different caving bodies by using the ores and the typical particles, the conclusion of the second group of experiments is that the shape of the caving body is close to that of the caving body. Under the condition of no dilution drawing, the ore recovery reaches 52.20, and the ore recovery reaches 78.28 at the end of drawing, which provides the basis for finding the best caving shape and optimizing the caving structure parameters.
【學位授予單位】：遼寧科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD853.362

【相似文獻】

相關期刊論文 前10條

1 涂繼正;關于兩種放出體的概念[J];有色金屬;1983年04期

2 俞勝健;梅山鐵礦工業(yè)放出體試驗[J];寶鋼技術;2000年04期

3 俞勝健;梅山鐵礦工業(yè)放出體試驗研究[J];冶金礦山設計與建設;2000年01期

4 張國建;翟會超;;無底柱分段崩落法放出體、松動體、崩落體三者關系模型[J];中國礦業(yè);2010年03期

5 ;高端壁放出體工業(yè)試驗[J];金屬礦山;1977年06期

6 童德輝;崩落采礦法放出體移動基本規(guī)律與計算[J];有色金屬;1984年03期

7 高永濤;放出體過渡關系證明及其等厚度過渡原理[J];有色金屬;1994年01期

8 陶干強,任鳳玉,李清望;基于神經(jīng)網(wǎng)絡的放出體形態(tài)研究[J];中國礦業(yè);2002年04期

9 陳小偉;明世祥;;崩落法開采中進路寬度對放出體形態(tài)的影響研究[J];金屬礦山;2009年S1期

10 孫長壽;用模糊規(guī)劃證明期望放出體的合理性[J];化工礦山技術;1993年05期

相關會議論文 前3條

1 陳小偉;明世祥;;崩落法開采中進路寬度對放出體形態(tài)的影響研究[A];第八屆全國采礦學術會議論文集[C];2009年

2 秦帥;余一松;李路;明世祥;;大間距無底柱放出體空間關系物理模擬放礦研究[A];2011年中國礦業(yè)科技大會論文集[C];2011年

3 董振民;;加大進路間距是無底柱分段崩落法參數(shù)優(yōu)化的方向[A];第四屆全國礦山采選技術進展報告會論文集[C];2001年

相關碩士學位論文 前5條

1 孟凡展;無底柱分段崩落法放出體形態(tài)的研究[D];遼寧科技大學;2015年

2 薛海軍;無底柱分段崩落法回采過程數(shù)據(jù)庫的建立及應用[D];遼寧科技大學;2013年

3 劉振東;無底柱分段崩落法結構參數(shù)優(yōu)化研究[D];南華大學;2011年

4 劉金山;石人溝鐵礦無底柱分段崩落法工藝參數(shù)的研究[D];河北理工大學;2009年

5 楊安國;尖山礦區(qū)掛幫礦散體流動參數(shù)和采場結構參數(shù)研究[D];昆明理工大學;2014年

，

本文編號：2362910