【摘要】：無底柱分段崩落法是一種結(jié)構(gòu)參數(shù)簡單、機(jī)械化程度高、生產(chǎn)能力大、成本低、安全性能好的采礦方法。在無底柱分段崩落法中,崩落體形態(tài)是影響放礦效果好壞的重要因素,崩落體陷落區(qū)深度是崩落體形態(tài)重要參數(shù)之一,但以往缺乏崩落體陷落區(qū)深度對(duì)降低礦石損失貧化的影響研究,因此該研究具有重要的意義。本文在文獻(xiàn)綜述的基礎(chǔ)上,提出了崩落體陷落區(qū)深度對(duì)礦石損失貧化影響的問題。研制了端部放礦大比例尺模型,并制作配套的定位片以及帶有編碼的彩色標(biāo)志性顆粒。確定了具體的實(shí)驗(yàn)方案,并進(jìn)行了五組不同深度崩落體陷落區(qū)實(shí)驗(yàn),每組實(shí)驗(yàn)都按照實(shí)驗(yàn)方案進(jìn)行礦巖的裝填,標(biāo)志性顆粒的擺放,以及放礦實(shí)驗(yàn)。在放礦過程中,采集了分選的礦巖數(shù)據(jù)、回收的標(biāo)志性顆粒并記錄相應(yīng)的編碼及放出時(shí)間,并對(duì)五組實(shí)驗(yàn)組數(shù)據(jù)分別進(jìn)行分析與處理。取得如下成果:1.研制端部放礦實(shí)驗(yàn)?zāi)Ｐ?并用該模型進(jìn)行了實(shí)驗(yàn)。2.進(jìn)行五組不同深度崩落體陷落區(qū)的實(shí)驗(yàn),結(jié)果表明:在其它條件一定時(shí),崩落體陷落區(qū)深度影響放出體的形成,對(duì)礦石損失貧化有較大影響,隨著陷落區(qū)深度加深,礦石損失率加大,礦石貧化率的變化幅度不大。崩落體陷落區(qū)深度為Omm時(shí),礦石損失率是29.73% ,貧化率是20.60% ,礦石損失率最小,貧化率相對(duì)較低。3.實(shí)驗(yàn)發(fā)現(xiàn):在其它條件一定時(shí),當(dāng)截止品位為20%時(shí),隨著崩落體陷落區(qū)深度的變化,每組實(shí)驗(yàn)回收的純礦石量是純礦石階段純礦石量的約2倍。4.端部放礦時(shí),陷落區(qū)極點(diǎn)位置越靠近流軸,極點(diǎn)下降速度、廢石與礦石接觸面的擴(kuò)展速度以及礦石的貧化速度越快。5.通過最小二乘法和高斯消元法擬合礦石損失率q(%)、礦石貧化率ρ(%)與崩落體陷落區(qū)深度h(mm)的關(guān)系為:q =- 1× 10~(-7)h~4 - 7 × 10~(-6) h~3 - 0.0002h~2 + 0.1526h + 29.73ρ = -6× 10~(-7)h~4 - 0.0001h~3 + 0.0056h~2 - 0.0224h + 20.06
[Abstract]:Sublevel caving without bottom pillar is a kind of mining method with simple structure parameters, high mechanization, large production capacity, low cost and good safety performance. In the sublevel caving method without bottom pillar, the caving shape is an important factor affecting the drawing effect, and the depth of caving area is one of the important parameters of caving shape. However, the previous study on the influence of depth of caving area on ore loss and dilution is of great significance. On the basis of literature review, this paper puts forward the influence of the depth of caving area on ore loss and dilution. A large scale model of end drawing was developed, and the matching location sheet and coded color landmark particles were made. The specific experimental scheme was determined and five groups of experiments on caving areas with different depth were carried out. Each group of experiments carried out the filling of ore and rock the placing of symbolic particles and the ore drawing experiment according to the experimental scheme. In the process of ore drawing, the separated ore and rock data were collected, the symbolic particles were recovered, the corresponding coding and releasing time were recorded, and the data of the five experimental groups were analyzed and processed respectively. The results are as follows: 1. The end drawing experiment model was developed and the experiment was carried out with the model. The experiments of five groups of caving areas with different depth are carried out. The results show that the depth of caving area affects the formation of the releasing body and the ore loss and dilution, and the depth of the caving area deepens with the depth of the subsidence area. The ore loss rate increases and the ore dilution rate does not change much. When the depth of caving area is Omm, the ore loss rate is 29.73%, the dilution rate is 20.60%, the ore loss rate is the least, and the dilution rate is relatively low. It is found that when the cutoff grade is 20 and the depth of caving area changes, the amount of pure ore recovered in each group of experiments is about 2 times that of pure ore in the stage of pure ore. At the end of ore drawing, the closer the pole position is to the flow axis, the lower the pole is, the faster the expansion rate of the interface between the waste rock and the ore is, and the faster the dilution rate of the ore is .5. By least square method and Gao Si elimination method, the ore loss rate Q (%) is fitted. The relation between ore dilution rate 蟻 (%) and depth h (mm) of caving area is: 1 脳 10 ~ (-7) hau 4-7 脳 10 ~ (-6) hum 3-0.0002h~2 0.1526 h 29.73 蟻 = 6 脳 10 ~ (-7) 0.0001h~3 0.0056h~2 -0.0224 h 20.06
【學(xué)位授予單位】：遼寧科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD853.362

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 胡杏保;潘健;麻雪嚴(yán);郭進(jìn)平;;無底柱分段崩落法不同回采順序的損失貧化研究[J];金屬礦山;2016年02期

2 蔣建忠;;論金屬礦床地下開采采礦方法稱謂[J];建材與裝飾;2015年45期

3 丁明福;周王貞;;無底柱分段崩落法在羊耳山鐵銅礦的應(yīng)用[J];有色金屬(礦山部分);2015年05期

4 楊宮印;;高破碎覆巖下放礦方案研究與應(yīng)用[J];中國非金屬礦工業(yè)導(dǎo)刊;2015年03期

5 ;In the First Two Months of This Year Nonferrous Metals Mining and Dressing Industry Invested 7.5 Billion Yuan,Up by 15.3%[J];China Nonferrous Metals Monthly;2015年05期

6 丁九桃;馬廷強(qiáng);;基于隨機(jī)理論的煤層端部放礦貧化損失計(jì)算[J];價(jià)值工程;2015年04期

7 劉海龍;;金屬礦山采礦技術(shù)與工藝的發(fā)展[J];河北企業(yè);2014年07期

8 蔡序淦;門建兵;黃德福;;無底柱分段崩落法結(jié)構(gòu)參數(shù)選取的影響因素[J];有色冶金設(shè)計(jì)與研究;2014年03期

9 王石;張欽禮;王新民;;基于橢球體放礦理論的后和睦山鐵礦脊部殘留原因分析[J];科技導(dǎo)報(bào);2014年06期

10 翟會(huì)超;閆滿志;;無底柱分段崩落法損失貧化的研究及發(fā)展[J];現(xiàn)代礦業(yè);2014年01期

，

本文編號(hào)：2150027