本文關鍵詞：大結構參數(shù)無底柱分段崩落法放礦方式與結構參數(shù)研究　出處：《西南科技大學》2016年碩士論文　論文類型：學位論文

  更多相關文章： 無底柱分段崩落法 大結構參數(shù) 放礦方式 結構參數(shù)優(yōu)化 采場穩(wěn)定性

【摘要】：隨著大型先進的鑿巖鏟裝設備逐漸被引進到我國,無底柱分段崩落法采場結構參數(shù)日益大型化,但礦石貧化率大、回收效果不佳的問題依然普遍存在。究其原因,與大結構參數(shù)條件下無底柱分段崩落法合理放礦方式及結構參數(shù)研究不充分、缺乏科學理論及技術指導等因素有密切關系。本論文結合攀鋼蘭尖鐵礦尖山礦區(qū)及酒鋼鏡鐵山礦樺樹溝礦區(qū)大結構參數(shù)無底柱分段崩落法結構參數(shù)及放礦方式優(yōu)化研究項目的研究需要,開展了對大結構參數(shù)無底柱分段崩落法合理放礦方式與結構參數(shù)研究。論文首先對無底柱分段崩落法放礦方式以及國內外大結構參數(shù)無底柱分段崩落法的研究現(xiàn)狀進行了歸納與總結,討論了現(xiàn)行放礦方式存在的問題及影響,對比分析了大結構參數(shù)條件下無貧化放礦的合理性并通過物理實驗模擬驗證了大結構參數(shù)條件下無貧化放礦方式在技術上的可行性及經(jīng)濟上的優(yōu)越性;同時,針對目前加大結構參數(shù)研究采用的原則和方法特別是基于“橢球體排列”理論提出的“大間距結構參數(shù)方案”存在的問題進行了分析研究,提出了更為科學合理的大結構參數(shù)分析及計算方法,并且結合酒泉鋼鐵鏡鐵山礦樺樹溝礦區(qū)的礦體條件,開展了大結構參數(shù)條件下無底柱分段崩落法合理放礦方式及結構參數(shù)優(yōu)化研究。研究表明,樺樹溝礦區(qū)V礦體無底柱分段崩落法采用無貧化放礦方式較礦山原計劃的截止品位與低貧化組合放礦方式礦石回收效果更好;同時,理論和實驗研究表明,針對樺樹溝礦區(qū)的礦體條件,20m×18m×2.8m和20m×20m×3.0m(分段高×進路間距×崩礦步距)的參數(shù)都是目前較優(yōu)的結構參數(shù);從操作層面上講,建議先將礦山目前的15m×18m×2.2m結構參數(shù)調整為20m×18m×2.8m。如有必要,可在前期結構參數(shù)調整順利完成后再實施20m×20m×3.0m的結構參數(shù)。此外,論文通過抗壓實驗進行了采場穩(wěn)定性研究,加大采場結構參數(shù)包括分段高度和進路間距都可以在一定程度上提高地下采場結構的穩(wěn)定性,有利于礦山生產(chǎn)和礦石的回收。
[Abstract]:With the introduction of large-scale advanced drilling and shovel equipment to China, the stope structure parameters of sublevel caving without bottom pillar are becoming larger and larger, but the ore dilution rate is large. The problem of poor recovery effect is still widespread. The reason is that the reasonable drawing mode and structural parameters of sublevel caving method without bottom pillar under the condition of large structural parameters are not sufficient. Lack of scientific theory and technical guidance is closely related to this paper combined with Panzhihua Iron and Steel Lanjian Iron Mine Jianshan mining area and Jiugang Jingtieshan mine Huashugou mining area large structure parameters without bottom pillar sublevel caving method structure parameters and ore drawing method excellent. The research needs of the project. The reasonable drawing mode and structure parameter of large structure parameter sublevel caving without bottom pillar are studied. Firstly, the ore drawing mode of sublevel caving without bottom pillar at home and abroad and the sublevel caving method without bottom pillar with large structural parameters are studied in this paper. It is summarized and summarized. The problems and effects of current drawing methods are discussed. The rationality of ore drawing without dilution under the condition of large structural parameters is comparatively analyzed and the technical feasibility and economic superiority of ore drawing without dilution under the condition of large structural parameters are verified by physical experiment simulation. At the same time, the principles and methods used in the study of structural parameters are analyzed and studied, especially the problems existing in the "large spacing structural parameter scheme" based on the theory of "ellipsoid arrangement". A more scientific and reasonable analysis and calculation method of large structural parameters is put forward and combined with the orebody conditions of Huashugou mining area of Jingtieshan Mine Jiuquan Iron & Steel Co., Ltd. The reasonable drawing mode and structural parameters optimization of sublevel caving method without bottom pillar under the condition of large structural parameters are studied. In Huashugou mining area, the method of sublevel caving without bottom pillar in V ore body is better than the original plan of cutoff grade and low dilution combined drawing method in ore recovery. At the same time, theoretical and experimental studies show that the orebody conditions of Huashugou mining area. The parameters of 20m 脳 18m 脳 2.8m and 20m 脳 20m 脳 3.0m (segmental high 脳 path spacing 脳 caving distance) are all better structural parameters at present. From the operation level, it is suggested that the present structural parameters of 15m 脳 18m 脳 2.2m should be adjusted to 20m 脳 18m 脳 2.8m. if necessary. The structural parameters of 20m 脳 20m 脳 3.0m can be carried out after the adjustment of structural parameters is completed successfully. In addition, the stope stability is studied by compression test. The stability of underground stope structure can be improved to a certain extent by increasing the structural parameters of stope, including subsection height and approach distance, which is beneficial to mine production and ore recovery.
【學位授予單位】：西南科技大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TD853.362
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本文編號：1433017