發(fā)布時間：2018-05-06 18:02

  本文選題：大斷面巷式充填 + 覆巖移動��； 參考：《中國礦業(yè)大學》2017年碩士論文

【摘要】：論文針對傳統(tǒng)開采方法所引起的地表沉陷和井下突水災害,以王臺鋪煤礦為工程研究背景,提出一種新式的采煤方法—大斷面巷式全采充填開采,綜合運用理論分析、物理相似模擬、數(shù)值模擬等研究方法,對該種采煤方法的覆巖移動規(guī)律和導水裂隙發(fā)育特征進行初步探討和研究,研究成果可為其以后的工程應用提供參考。主要得出的結論如下:(1)通過理論分析研究發(fā)現(xiàn)該采煤法跟常規(guī)采煤法類似,充填前頂板移近量、充填體壓縮量和未接頂量是覆巖移動的主要影響因素。并且通過理論分析發(fā)現(xiàn),在四個開采階段中,第一、第二階段覆巖基本不跨落只發(fā)育裂隙和彎曲下沉,在后面的兩個階段中裂隙迅速發(fā)育,但是頂板的下沉還是在可控范圍內。以彈性地基理論為基礎建立了兩類情況下的頂板移動模型,并根據(jù)撓度跟轉角、曲率之間的關系,又分別建立了兩類頂板的轉角和曲率模型。在忽略頂板提前下稱量和充填體壓縮量前提下,將充實率乘以采高近似于煤層的采高,提出了如何理論預測導水裂隙發(fā)育高度的方法。(2)通過物理相似模擬研究了三個開采階段的方案下的覆巖移動規(guī)律�？梢园l(fā)現(xiàn)在巷道開采的前期頂板位移量非常小,但是在第三階段開采過程中,頂板下沉量急劇增加。因此可以說明最后開采階段是控制覆巖移動變形的“關鍵階段”。第三階段開采完畢后,覆巖結構基本完整沒有出現(xiàn)垮落帶,只在煤層上方的小部分范圍內有裂隙發(fā)育,覆巖中只出現(xiàn)三帶中的兩帶裂隙帶和彎曲下沉帶。(3)通過數(shù)值模擬研究了四個開采階段方案條件下的覆巖移動特征,進一步證實了最后開采階段是控制覆巖移動的“關鍵階段”主要表現(xiàn)在地表最大下沉系數(shù)、頂板最大下沉量、最大支承壓力以及導水裂隙發(fā)育高度隨著巷道的推進而增加,其中在最后一階段的開采過程中的增加量要遠遠大于前三階段的增值;覆巖參數(shù)地表最大下沉系數(shù)、直接頂最大下沉量、支承壓力、導水裂隙發(fā)育在前三個開采階段基本不隨著充填率的改變而發(fā)生變化,但是在第四階段不同充填率的四類覆巖參數(shù)發(fā)生了變化,在最后一個階段充填率成為了控制覆巖移動的主導因素,直接頂?shù)淖畲笙鲁亮扛涮盥食式曝撓嚓P的關系,其中最大支承壓力的位置由第三階段的采場中央的第四階段煤柱轉移到了采場兩側的煤壁中。(4)因此可以得出結論“關鍵階段”以及充填率是大斷面巷式充填覆巖移動變形的主要控制因素,在某些地質條件非常復雜,生態(tài)系統(tǒng)脆弱的地區(qū)可以選擇保留下“關鍵階段”不開采以及盡量提高充填率等措施。
[Abstract]:Aiming at the surface subsidence and underground water inrush disaster caused by traditional mining method, taking Wangtaipu coal mine as the engineering research background, this paper puts forward a new kind of coal mining method-large-section roadway type full mining and filling mining, and synthetically applies the theory analysis. Physical similarity simulation, numerical simulation and other research methods are used to study the overburden movement law and the characteristics of water-conducting fracture development of this kind of mining method. The research results can provide a reference for its engineering application in the future. The main conclusions are as follows: (1) through theoretical analysis and research, it is found that the coal mining method is similar to the conventional mining method, and the front roof movement of the filling, the amount of compression of the filling body and the amount of unconnected roof are the main influencing factors of the overburden movement. Through theoretical analysis, it is found that in the first and second stages, the overburden only develops fissures and bending subsidence in the first and second stages, and the cracks develop rapidly in the latter two stages, but the roof subsidence is still within the controllable range. Based on the theory of elastic foundation, two kinds of roof moving models are established. According to the relationship between deflection, rotation angle and curvature, the two kinds of roof rotation angle and curvature model are established respectively. On the premise of neglecting the weight of the roof in advance and the compression of the filling body, the enrichment rate multiplied by the mining height is similar to the mining height of the coal seam. A theoretical method of predicting the height of water-conducting fractures is put forward. The overlying rock movement under three mining stages is studied by means of physical similarity simulation. It can be found that in the early stage of roadway mining, the roof displacement is very small, but in the third stage, the roof subsidence increases sharply. Therefore, it can be concluded that the final mining stage is a critical stage for controlling the movement and deformation of overburden. After the third stage of mining, the overburden structure basically did not appear collapse zone, only in a small part of the area above the coal seam developed cracks, The characteristics of overburden movement under four mining stages are studied by numerical simulation. It is further proved that the final mining stage is the "critical stage" for controlling the movement of overburden rock, which is mainly manifested in the maximum subsidence coefficient of the surface, the maximum roof subsidence, the maximum supporting pressure and the development height of the water-conducting fissure with the advance of the roadway. The increment in the last stage of mining is much larger than the increment of the first three stages, the maximum subsidence coefficient of overburden parameters, the maximum subsidence of the direct top, and the supporting pressure, In the first three mining stages, the development of water-conducting fractures does not change with the change of filling rate, but in the fourth stage, four types of overburden parameters with different filling rates change. In the last stage, the filling rate becomes the dominant factor to control the overburden movement, and the maximum subsidence of the direct roof has an approximate negative correlation with the filling rate. The position of the maximum supporting pressure is transferred from the fourth stage pillar in the middle of the third stage of the stope to the coal wall on both sides of the stope. Therefore, the conclusion can be drawn that the "critical stage" and the filling rate are large section roadway filling overburden. The main controlling factors of movement and deformation, In some areas where the geological conditions are very complex and the ecosystem is fragile, we can choose to keep the "critical stage" from mining and to increase the filling rate as far as possible.
【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

【參考文獻】

相關期刊論文 前10條

1 范立民;;保水采煤的科學內涵[J];煤炭學報;2017年01期

2 朱訓國;夏洪春;王忠昶;;煤層開采過程中覆巖移動規(guī)律的UDEC數(shù)值模擬[J];遼寧工程技術大學學報(自然科學版);2016年12期

3 張東升;張煒;馬立強;王旭鋒;范鋼偉;;覆巖采動裂隙氡氣探測研究進展及展望[J];中國礦業(yè)大學學報;2016年06期

4 吳愛祥;王勇;王洪江;;膏體充填技術現(xiàn)狀及趨勢[J];金屬礦山;2016年07期

5 肖宏偉;;2015年能源形勢分析及2016年預測[J];發(fā)展研究;2016年04期

6 梁世忠;;煤層鉆孔周圍應力分布規(guī)律的UDEC數(shù)值模擬[J];山西焦煤科技;2016年04期

7 范立民;馬雄德;冀瑞君;;西部生態(tài)脆弱礦區(qū)保水采煤研究與實踐進展[J];煤炭學報;2015年08期

8 范立民;張曉團;向茂西;張紅強;申濤;林平選;;淺埋煤層高強度開采區(qū)地裂縫發(fā)育特征——以陜西榆神府礦區(qū)為例[J];煤炭學報;2015年06期

9 徐衛(wèi)華;;“三下一上”采煤技術的現(xiàn)狀和發(fā)展[J];山西煤炭管理干部學院學報;2015年02期

10 黃慶享;張文忠;;淺埋煤層條帶充填隔水巖組力學模型分析[J];煤炭學報;2015年05期

相關會議論文 前1條

1 于學馥;劉同有;;金川的充填機理與采礦理論[A];面向21世紀的巖石力學與工程：中國巖石力學與工程學會第四次學術大會論文集[C];1996年

相關博士學位論文 前7條

1 徐國政;碳約束下中國能源消費結構優(yōu)化研究[D];中國礦業(yè)大學(北京);2016年

2 楊鵬飛;煤礦膠結充填開采覆巖移動及礦壓顯現(xiàn)規(guī)律研究[D];中國礦業(yè)大學(北京);2016年

3 王光偉;膏體充填開采遺留條帶煤柱的理論研究與實踐[D];中國礦業(yè)大學;2014年

4 王韶華;基于低碳經濟的我國能源結構優(yōu)化研究[D];哈爾濱工程大學;2013年

5 王磊;固體密實充填開采巖層移動機理及變形預測研究[D];中國礦業(yè)大學;2012年

6 馮光明;超高水充填材料及其充填開采技術研究與應用[D];中國礦業(yè)大學;2009年

7 劉玉德;沙基型淺埋煤層保水開采技術及其適用條件分類[D];中國礦業(yè)大學;2008年

相關碩士學位論文 前4條

1 郭曉彥;充填膏體性能影響因素試驗研究[D];太原理工大學;2013年

2 何發(fā)龍;膏體充填采礦關鍵安全問題研究[D];中南大學;2013年

3 郭振華;村莊下膏體充填采煤控制地表沉陷的研究[D];中國礦業(yè)大學;2008年

4 丁德強;礦山地下采空區(qū)膏體充填理論與技術研究[D];中南大學;2007年

，

本文編號：1853310