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超高水材料袋式充填開采地表下沉特征研究

發(fā)布時間:2018-05-24 03:13

  本文選題:超高水材料 + 袋式充填開采 ; 參考:《中國礦業(yè)大學》2017年碩士論文


【摘要】:近年來,隨著煤炭資源越來越緊張,各地逐步擴大“三下”資源的開采規(guī)模,充填開采方法的應(yīng)用越來越廣泛。超高水材料含水量高、凝固速度快和強度高,具有良好的應(yīng)用前景。本論文以冀中能源邯鄲礦業(yè)集團超高水材料袋式充填開采為工程背景,綜合運用現(xiàn)場調(diào)研、理論分析、相似模擬、數(shù)值模擬和現(xiàn)場實測等手段,重點對袋式充填開采地表下沉特征展開研究,主要工作成果如下:(1)結(jié)合邯鄲礦區(qū)超高水材料充填開采地質(zhì)條件及充填工藝,闡述了超高水材料充填開采的覆巖活動規(guī)律,系統(tǒng)分析了充填開采工作面需控圍巖,研究了充填率、液壓支架結(jié)構(gòu)與性能、充填體強度等因素對袋式充填開采覆巖活動的影響,得到了充填率是影響地表下沉的關(guān)鍵要素。(2)采用模擬實驗的方法,分析了超高水材料袋式充填開采不同充填率條件下,覆巖活動及地表下沉的變化規(guī)律,依據(jù)模擬分析的結(jié)果,計算袋式充填開采工作面的充填率,確定了袋式充填開采的最低充填率,提出了提高充填效果的保障措施及相關(guān)技術(shù)。(3)通過陶一礦12706超高水材料袋式充填開采工作面現(xiàn)場實測結(jié)果,驗證了袋式充填開采地表沉降控制的可靠性,基于袋式充填開采地表下沉曲線,對地表移動參數(shù)進行了擬合,實測結(jié)果表明:在此條件下,袋式充填開采工作面的充填率不小于82%時,基本能夠保證對地表建筑物的保護。
[Abstract]:In recent years, with the increasing shortage of coal resources, the mining scale of "three down" resources has been gradually expanded, and the filling mining method has been applied more and more widely. With high water content, high solidification speed and high strength, ultra-high water material has a good application prospect. This paper takes the bag filling mining of ultra-high water material in Handan Mining Group of Jizhong Energy as the engineering background, and synthetically applies field investigation, theoretical analysis, similarity simulation, numerical simulation and field measurement, etc. The characteristics of surface subsidence in bag filling mining are mainly studied. The main results are as follows: (1) combined with the geological conditions and filling technology of ultra-high water material filling in Handan mining area, the overlying rock activity law of ultra-high water material filling mining is expounded. The influence of filling rate, structure and performance of hydraulic support and strength of backfill on overburden activity of bag filling mining is studied systematically. It is obtained that filling rate is the key factor affecting the surface subsidence. By using the method of simulation experiment, the variation law of overlying rock activity and surface subsidence under different filling rates of bag filling mining with ultra-high water materials is analyzed, and the results of simulation analysis are used to analyze the change of overburden activity and surface subsidence. The filling rate of bag filling mining face is calculated, and the minimum filling rate of bag filling mining is determined. This paper puts forward the safeguard measures to improve the filling effect and related technology. (3) through the field measured results of 12706 ultra-high water material bag filling mining face in Taoyi Mine, the reliability of surface subsidence control in bag filling mining is verified. Based on the surface subsidence curve of bag filling mining, the surface movement parameters are fitted. The measured results show that under this condition, when the filling rate of bag filling mining face is not less than 82, it can basically ensure the protection of surface buildings.
【學位授予單位】:中國礦業(yè)大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TD325.2

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