【摘要】：尖山礦區(qū)傾斜一急傾斜中厚礦體,在放礦過程中要受到上下盤邊壁的影響,導(dǎo)致其下盤殘留量過大,礦石的損失貧化嚴(yán)重等問題。在傾斜-急傾斜中厚礦體采用無底柱分段崩落法開采,崩落散體在放礦過程中受到上下盤邊壁的影響,放出體發(fā)生變異,目前國內(nèi)外對該條件下散體流動規(guī)律尚缺乏研究。本文以降低尖山礦區(qū)急傾斜中厚礦體損失貧化為目的,結(jié)合礦體產(chǎn)狀和回采工藝,以物理相似模擬為研究手段,采用改進的達孔量法和3Dmine軟件完成了傾斜邊壁條件下放出體的圈定,并通過實驗得到了殘留體的形態(tài),分析了崩落礦巖在移動過程中受到上下盤邊壁影響下放出體形態(tài)特征規(guī)律、礦巖散體移動規(guī)律及下盤礦石殘留體特征。主要工作如下：通過查閱資料,收集了區(qū)域地質(zhì)資料、礦體賦存特征、工程地質(zhì)及水文地質(zhì)特征資料。根據(jù)尖山礦區(qū)急傾斜中厚礦體產(chǎn)狀特征,采用相似模型試驗,開展了兩個分段礦石的模擬實驗,對礦石的損失貧化情況進行了測定分析。通過以上工作,得到如下結(jié)論：通過急傾斜中厚礦體端部放出體實驗繪制出放出體形態(tài),通過對位于礦巖移動區(qū)域無影響區(qū)的放出體形態(tài)進行放出體擬合,得出了礦石散體的流動參數(shù)為：α=1.3864；β=0.2496；α1=1.132；β1=0.324,當(dāng)α=1.3864l/ln2,說明放出體是上部較窄,下部較寬,結(jié)合實驗得到的放出體形態(tài),說明得出的參數(shù)和實驗得到的放出體形態(tài)擬合較好。通過對礦巖穩(wěn)定性情況和礦石主要損失形式分析入手,為了提高礦石的回收率,通過優(yōu)化采場結(jié)構(gòu)參數(shù)改善礦石的損失貧化情況。通過采場結(jié)構(gòu)參數(shù)優(yōu)化,在采用無底柱分段崩落開采時采場的最佳結(jié)構(gòu)參數(shù)為：分段高度(h)為20m；放礦步距為5.2m,崩礦步距(R)為3.5m。本論文采用水平剖面達孔量法和3Dmine軟件創(chuàng)新性完成了傾斜邊壁條件下的放出體的準(zhǔn)確圈定,為該類條件下放礦規(guī)律研究和礦山生產(chǎn)提供借鑒參考。
[Abstract]:Due to the influence of the upper and lower side wall in the drawing process of the dipping and steep inclined medium thick orebody in the Jianshan mining area, the residual amount in the lower wall is too large, and the ore loss and dilution are serious, and so on. The sublevel caving method is adopted in the inclined and steeply inclined medium thick ore bodies. The caving loose is affected by the upper and lower side wall during the drawing process, and the release body changes. At present, there is little research on the flow law of the loose body at home and abroad. In order to reduce the loss and dilution of steeply inclined medium thick orebody in Jianshan mining area, combined with the occurrence of orebody and mining technology, the physical similarity simulation is used as the research method in this paper. Using the improved method of reaching hole volume and 3Dmine software to complete the delineation of the releasing body under the condition of inclined edge wall, the shape of the residual body was obtained by experiments. In this paper, the characteristics of the shape of the caving rock, the movement of the ore scattered body and the ore remnant in the footwall are analyzed under the influence of the upper and lower side wall of the caving ore. The main work is as follows: regional geological data, orebody occurrence characteristics, engineering geology and hydrogeological characteristics are collected by consulting data. According to the occurrence characteristics of steeply inclined medium thick ore bodies in Jianshan mining area, two simulation experiments of ore sections were carried out by using similar model tests, and the loss and dilution of ores were measured and analyzed. Through the above work, the following conclusions are obtained: drawing out the shape of the discharge body through the experiment of the tip of the steeply inclined and thick ore body, and fitting the shape of the discharge body in the unaffected area of the moving area of the ore and rock. The flow parameters of the ore pellets are as follows: 偽 = 1.3864; 尾 = 0.2496; 偽 1n = 1.132; 尾 1n = 0.324.When 偽 = 1.3864l / ln2n 2, it shows that the exfoliator is narrower in upper part and wider in lower part. Based on the analysis of the stability of ore and the main loss forms of ore, in order to improve the recovery rate of ore, the loss and dilution of ore are improved by optimizing the structural parameters of stope. Through the optimization of stope structure parameters, the optimum structural parameters of stope with sublevel caving without bottom pillar are as follows: (h) of subsection height is 20m, step distance of drawing is 5.2mand (R) of caving is 3.5m. In this paper, the horizontal profile method and 3Dmine software are used to creatively complete the accurate delineation of the drawing body under the condition of inclined edge wall, which provides a reference for the study of drawing law and mine production under this kind of conditions.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD851

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本文編號：2276326