本文選題：分層開采 + 底分層　； 參考：《安徽理工大學(xué)》2017年碩士論文

【摘要】：厚煤層分層開采過程中,底分層工作面的礦壓顯現(xiàn)與一般的長壁工作面有著明顯的不同,工作面覆巖受到兩次采動影響,工作面前方煤體容易片幫,頂板易冒頂,工作面的頂板管理比較困難,研究分層開采底分層工作面覆巖運(yùn)移及控制和礦壓顯現(xiàn)規(guī)律,為分層工作面的開采提供理論指導(dǎo)和依據(jù)。潘北煤礦11111底分層工作面頂板分為實(shí)體煤頂板和采空區(qū)頂板兩種條件,通過理論分析,揭示工作面的頂板結(jié)構(gòu)特征和力學(xué)特征,分析了上分層工作面開采對下分層的影響,實(shí)體煤頂板條件下和采空區(qū)頂板條件下支架的壓力計算公式;通過數(shù)值模擬,對不同頂板條件下,覆巖裂隙發(fā)育與頂板破斷規(guī)律、采動應(yīng)力的變化特點(diǎn)和支架工作壓力進(jìn)行分析;通過對現(xiàn)場的礦壓觀測、工作面直接頂在初采期間的冒落情況,對比分析采空區(qū)頂板條件下和實(shí)體煤頂板條件下煤壁片幫情況,分析工作面支架來壓判據(jù),確定工作面初采期間工作面的來壓步距,通過對工作面超前煤體應(yīng)力觀測,分析工作面不同頂板情況下超前支承壓力分布規(guī)律。研究結(jié)果得出,實(shí)體煤頂板條件下工作面回采與一般單一煤層開采礦壓規(guī)律一致;采空區(qū)頂板條件下工作面受上分層開采影響,煤體破壞嚴(yán)重,工作面支架靜載荷大,工作面覆巖"三帶高度"明顯高于實(shí)體煤頂板條件下的"三帶高度"。
[Abstract]:In the process of stratified mining in thick coal seam, the rock pressure of the bottom stratified working face is obviously different from that of the general longwall working face. The overburden of the working face is affected by two mining processes, the coal body in front of the face is easy to slice the roof, and the roof is prone to roof fall. It is difficult to manage the roof of the working face. To study the movement and control of the overburden and the law of the rock pressure appearance in the stratified working face at the bottom of the stratified mining face provide theoretical guidance and basis for the mining of the stratified working face. The roof of 11111 bottom stratified face in Panbei coal mine can be divided into solid coal roof and goaf roof. Through theoretical analysis, the roof structure characteristics and mechanical characteristics of the working face are revealed, and the influence of mining on the lower stratification is analyzed. The calculation formula of support pressure under solid coal roof condition and goaf roof condition, through numerical simulation, the law of overburden crack development and roof breaking under different roof conditions, The variation characteristics of mining stress and the working pressure of the support are analyzed, through the observation of the mine pressure in the field, the caving situation of the face directly top during the initial mining, the coal wall and the roof under the condition of the roof in the goaf and the solid coal roof are compared and analyzed. Based on the analysis of the working face support pressure criterion and the determination of the pressure step distance of the working face during the initial mining, the distribution law of the leading supporting pressure under different roof conditions of the working face is analyzed by observing the stress of the coal body in the working face ahead of time. The results show that the mining pressure of the working face under the solid coal roof condition is the same as that of the general single coal seam mining, the working face under the condition of goaf roof is affected by the upper layer mining, the coal body is destroyed seriously, and the static load of the support in the working face is large. The height of "three zones" of overlying face is obviously higher than that of "three zones" under the condition of solid coal roof.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD325

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 樊克松;申寶宏;王東攀;井慶賀;張震;;分層開采注氮置換上分層采空區(qū)瓦斯技術(shù)研究[J];煤炭科學(xué)技術(shù);2017年01期

2 王春光;;上分層遺留煤柱形成階段和回收期間的應(yīng)力演化規(guī)律[J];煤礦安全;2017年01期

3 張超;呂田芳;馮建波;;太平煤礦三分層膏體充填開采方案探討[J];山東煤炭科技;2016年12期

4 王春光;蘇偉偉;;強(qiáng)突出厚煤層高效安全開采技術(shù)研究[J];煤礦安全;2016年07期

5 李飛;王金安;李鵬飛;黃坤;;山區(qū)下開采覆巖移動規(guī)律及破斷機(jī)制研究[J];巖土力學(xué);2016年04期

6 孫聰;王曉波;高文虎;;高強(qiáng)度聚酯柔性網(wǎng)在分層開采中的應(yīng)用[J];山東煤炭科技;2016年03期

7 宗磊;楊康;霍永杰;;自燃煤層下分層開采防滅火技術(shù)實(shí)踐[J];內(nèi)蒙古煤炭經(jīng)濟(jì);2016年Z1期

8 薛永利;趙亮;馮浩;;特厚煤層分層開采煤自燃防治技術(shù)研究[J];煤礦現(xiàn)代化;2016年01期

9 薛挺;宋平;;錯層位無煤柱開采上覆巖層運(yùn)移規(guī)律研究[J];煤炭技術(shù);2016年02期

10 李俊孟;齊文躍;邰陽;;固體充填采煤覆巖移動規(guī)律相似模擬實(shí)驗(yàn)研究[J];礦業(yè)研究與開發(fā);2016年01期

相關(guān)碩士學(xué)位論文 前1條

1 王鵬;復(fù)雜開采條件下覆巖移動和變形規(guī)律的模擬研究[D];太原理工大學(xué);2010年

，

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