本文選題：空場嗣后充填采礦法 + 復(fù)雜受力環(huán)境��； 參考：《昆明理工大學(xué)》2015年碩士論文

【摘要】：隨著礦產(chǎn)資源開采技術(shù)的發(fā)展,無廢開采已經(jīng)成為采礦技術(shù)發(fā)展的必然趨勢�？請鏊煤筮B續(xù)開采工藝具有生產(chǎn)效率高、資源回采強(qiáng)度大、節(jié)省尾砂堆存場所、減少環(huán)境污染、降低貧化損失指標(biāo)、能有效控制采區(qū)地壓等優(yōu)勢,越來越受到人們的重視。該工藝將階段劃分為一步礦房和二步礦房,先采一步礦房,采后進(jìn)行膠結(jié)充填,待其凝結(jié)后,再回采二步礦房,采后用水砂充填。由于一步膠結(jié)充填體穩(wěn)定性受自身外形尺寸及復(fù)雜受力環(huán)境的影響,使得設(shè)計(jì)合理的強(qiáng)度確保膠結(jié)充填體在回采過程中的穩(wěn)定性成為該法成功應(yīng)用的關(guān)鍵性技術(shù)難題。大紅山銅礦B88-92-3盤區(qū),采用空場嗣后充填采礦法,盤區(qū)設(shè)計(jì)高度70m,長度89m,寬度30m。為節(jié)約充填成本,盤區(qū)中部礦柱設(shè)計(jì)寬度僅為10mm,采用塊石尾砂膠結(jié)充填。該膠結(jié)礦柱高寬比為7：1,長寬比為3：1,為典型的“高、窄、長”膠結(jié)礦柱,受外形尺寸影響膠結(jié)礦柱所需強(qiáng)度較高。根據(jù)礦山的實(shí)際采充順序,膠結(jié)礦柱在盤區(qū)回采過程中將先后暴露2次,單側(cè)臨空面高,暴露面積較大。盤區(qū)回采程中,膠結(jié)礦柱前期要求自立,后期不僅要求自立同時(shí)還要承載頂部巖體壓力和水砂側(cè)向壓力,受力環(huán)境復(fù)雜多變。論文以大紅山B88-92-3盤區(qū)膠結(jié)礦柱強(qiáng)度設(shè)計(jì)為研究背景,總結(jié)了國內(nèi)外確定膠結(jié)充填體強(qiáng)度的方法,分為經(jīng)驗(yàn)類比法、強(qiáng)度模型法和數(shù)值分析方法。經(jīng)分析認(rèn)為：①經(jīng)驗(yàn)類比法科學(xué)性不足,帶有較強(qiáng)的主觀性；②強(qiáng)度模型法適用條件單一,僅能計(jì)算“自立”性或“承載”性膠結(jié)礦柱的強(qiáng)度計(jì)算,不能計(jì)算復(fù)雜受力環(huán)境下膠結(jié)充填體的強(qiáng)度。因此,論文采用數(shù)值模擬方法計(jì)算B88-92-3盤區(qū)膠結(jié)礦柱所需強(qiáng)度。首先采用彈性算法,確定膠結(jié)礦柱極限平衡狀態(tài)下的強(qiáng)度參數(shù)；其次以彈性方案確定的參數(shù)為基礎(chǔ),進(jìn)行彈塑性數(shù)值計(jì)算分析,確定了B88-92-3盤區(qū)膠結(jié)礦柱可在強(qiáng)度參數(shù)為內(nèi)聚力0.8Mpa、內(nèi)摩擦角31°的情況下保持穩(wěn)定,并通過莫爾-庫倫準(zhǔn)則計(jì)算出膠結(jié)礦柱所需最大強(qiáng)度為2.77Mpa。在確定膠結(jié)礦柱強(qiáng)度的基礎(chǔ)上,通過實(shí)驗(yàn)分析確定了在空區(qū)內(nèi)先下塊石,后下膠結(jié)料漿或者同時(shí)下料的充填方式,開展半工業(yè)實(shí)驗(yàn)確定了膠結(jié)料漿配合比。膠結(jié)料漿在水泥添加量為300kg/m3,濃度為70%—72%的條件下,不僅能實(shí)現(xiàn)管輸自流,而且膠結(jié)料漿包裹塊石的效果最好。由于膠結(jié)礦柱較高,不可能實(shí)現(xiàn)一次充填,根據(jù)膠結(jié)料漿在塊石里的滲透高度(3.5m),將膠結(jié)礦柱在全高上設(shè)計(jì)為分層充填體,分層高度5m。以論文中設(shè)計(jì)的參數(shù)開展工業(yè)試驗(yàn)。工業(yè)實(shí)踐表明：大紅山B88-92-3盤區(qū)膠結(jié)礦柱在盤區(qū)回采過程中保持了自身的穩(wěn)定性和整體性,為盤區(qū)回采提供了安全可靠的作業(yè)環(huán)境。證明了論文中所設(shè)計(jì)強(qiáng)度參數(shù)的合理性。論文不僅解決了大紅山銅礦B88-92-3盤區(qū)“高、窄、長”復(fù)雜受力環(huán)境下膠結(jié)礦柱強(qiáng)度設(shè)計(jì)的難題,而且為大紅銅礦膠結(jié)礦柱強(qiáng)度的確定提供了設(shè)計(jì)方法,同時(shí)為大紅山銅礦推廣塊石尾砂膠結(jié)充填以實(shí)現(xiàn)降低水泥用量、節(jié)省生產(chǎn)成本提供了技術(shù)支撐,具有廣大的推廣價(jià)值。
[Abstract]:With the development of mineral resources mining technology, no waste mining has become an inevitable trend in the development of mining technology. The open subsequent continuous mining technology has high production efficiency, large resource recovery intensity, save the tailings storage site, reduce environmental pollution, reduce the dilution loss index, and effectively control the ground pressure in the mining area, and more and more people have received more and more people. The process is divided into one step ore house and two step ore house, first step mine room, after mining and cemented filling, after its condensation, then two steps of mining and filling with water sand. Because the stability of the one step cementing filling body is affected by its own shape size and complex stress ring, the reasonable design strength ensures the cementation charge. The stability of the filling in the recovery process has become a key technical problem for the successful application of this method. The B88-92-3 disk area of the great Hongshan copper mine adopts the empty field subsequent filling mining method, the design height of the disc area is 70m, the length is 89m, the width 30m. is the filling cost, the design width of the central pillar in the middle of the disk area is only 10mm, and the cemented ore is filled with the block stone tailings. The column height to width ratio is 7:1 and the ratio of length to width is 3:1. It is a typical "high, narrow, long" cemented pillar. The strength of the cemented pillar is higher by the shape size. According to the actual mining order of the mine, the cemented pillar will be exposed to 2 times in the disk mining process, the single side face is high, and the exposed area is large. In the plate area recovery process, the cemented pillar is in the early stage. In this paper, the strength design of cemented pluton in the B88-92-3 disk area of Da Hongshan is studied. The method of determining the strength of cemented filling body at home and abroad is summarized, which is divided into empirical analogy method, strength model method and numerical analysis. Method. After analysis, it is believed that: (1) the empirical analogy method is not scientific and has strong subjectivity; secondly, the strength model method can only calculate the strength of the "self standing" or "bearing" cemented pillar, and can not calculate the strength of the cemented filling body under the complex stress environment. Therefore, the numerical simulation method is used to calculate the B8. The strength required for the cemented pillar in the 8-92-3 disk area. First, the elastic algorithm is used to determine the strength parameters under the limit equilibrium state of the cemented pillar. Secondly, based on the parameters determined by the elastic scheme, the elastoplastic numerical calculation and analysis are carried out. It is determined that the cemented pillar in the B88-92-3 disk area can be the cohesive 0.8Mpa and the internal friction angle of 31 degrees. The maximum strength required by the Mohr Kulun criterion is to calculate the maximum strength of the cemented pillar of 2.77Mpa.. On the basis of determining the strength of the cemented pillar, through the experimental analysis, the first block stone, the back cementation slurry or the filling method of the material at the same time are determined by the experimental analysis. The cemented slurry mixture ratio is determined by the semi industrial experiment. The cementing slurry is determined. Under the condition of the cement adding amount of 300kg/m3 and the concentration of 70% - 72%, it can not only achieve the self flow of pipe transportation, but also the best effect of the cemented slurry wrapping block stone. Because the cemented pillar is high, it can not be filled in one time. According to the penetration height of the cemented slurry in the block stone (3.5m), the cemented pillar is designed as a stratified filling body at all height and stratified. The industrial practice of high 5m. is carried out with the parameters designed in the paper. Industrial practice shows that the stability and integrity of the cemented pillar in the B88-92-3 disk area of the great red mountain maintain its own stability and integrity in the process of disk recovery. It provides a safe and reliable working environment for the recovery of the disk area. The strength design of cemented pillar in the B88-92-3 area of the great Hongshan copper mine is "high, narrow and long". It provides a design method for the determination of the strength of the cemented pillar of the big red copper mine. At the same time, it provides technical support for reducing the amount of water and mud and saving the cost of production by applying the cemented filling of the block stone tailings in the big red copper mine. It has broad popularization value.
【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】：TD853.34

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本文編號：1986756