【摘要】：自二十世紀(jì)80年代以來,我國安徽兩淮、江蘇徐州、河南永夏、山東兗州和黑龍江東榮等礦區(qū)相繼發(fā)生大量立井井壁破裂事故,現(xiàn)行對(duì)井壁破裂原因已達(dá)成共識(shí),即破裂井壁所穿過表土層的底部含水層直接覆蓋在風(fēng)化基巖段之上,缺乏隔水層,由于底部含水層疏水沉降產(chǎn)生作用于井筒之上的豎向附加力(負(fù)摩擦力)是造成立井井壁破裂的主要原因。 許疃煤礦改擴(kuò)建工程的新主井和北風(fēng)井均穿越此類疏水沉降地層,因此在井壁結(jié)構(gòu)設(shè)計(jì)中,應(yīng)考慮豎向附加力的影響以預(yù)防井壁破裂。 為此,本文采用理論分析、模型試驗(yàn)和數(shù)值模擬相結(jié)合的研究手段,對(duì)許疃煤礦改擴(kuò)建工程凍結(jié)井可縮性井壁接頭進(jìn)行研究,研究?jī)?nèi)容和成果如下： (1)根據(jù)凍結(jié)井可縮性井壁接頭的設(shè)計(jì)原則和方法,針對(duì)許疃煤礦新主井和北風(fēng)井,各設(shè)置豎向可縮性井壁接頭1個(gè),分別位于累深357m和353m層位,并得到了凍結(jié)井可縮性井壁接頭的結(jié)構(gòu)參數(shù)。 (2)采用模型試驗(yàn)方法,對(duì)可縮性井壁接頭進(jìn)行豎向、側(cè)向和三軸加載模型試驗(yàn)。試驗(yàn)結(jié)果表明,豎向加載情況下井壁接頭的壓縮變形率可達(dá)47%,三軸加載情況下井壁接頭的壓縮變形率可達(dá)48.8%,側(cè)向加載情況下井壁接頭承載力可達(dá)29.16MPa,可知該可縮性井壁接頭具有良好的壓縮特性和防水性能。 (3)采用數(shù)值模擬方法,對(duì)可縮性井壁接頭的力學(xué)特性進(jìn)行分析。通過將數(shù)值模擬得到的井壁接頭豎向承載力與模型試驗(yàn)結(jié)果相比較,驗(yàn)證了數(shù)值模擬分析的可靠性。 (4)根據(jù)凍結(jié)井筒內(nèi)層井壁的施工工序,提出了凍結(jié)井可縮性井壁接頭的現(xiàn)場(chǎng)施工技術(shù)。 凍結(jié)井可縮性井壁接頭在許疃礦新主井和北風(fēng)井中得到了成功應(yīng)用,相應(yīng)的設(shè)計(jì)和施工技術(shù)可為類似工程提供參考依據(jù)。凍結(jié)井可縮性井壁接頭可廣泛應(yīng)用于類似地層條件下的煤礦新井建設(shè)與改擴(kuò)建工程中,將產(chǎn)生更大的社會(huì)與經(jīng)濟(jì)效益。
[Abstract]:Since the 1980s, a large number of shaft wall fracture accidents have occurred in Anhui, Xuzhou, Jiangsu, Yongxia, Shandong, Yanzhou, Shandong and Dongrong, Heilongjiang, etc., and the causes of shaft wall fracture have been agreed at present. That is, the bottom aquifer through which the broken shaft wall passes through the topsoil layer is directly covered on the weathered bedrock section, and there is a lack of water insulation layer. Because the hydrophobic settlement of the bottom aquifer produces the vertical additional force (negative friction force) acting on the wellbore, the main cause of the shaft wall fracture is the hydrophobic settlement of the bottom aquifer. Both the new main well and the north wind well of the reconstruction and expansion project of Xutuan Coal Mine pass through this kind of hydrophobic subsidence formation, so the influence of vertical additional force should be considered in the design of shaft lining structure to prevent shaft wall fracture. In this paper, the retractable shaft lining joint of frozen well in Xutuan Coal Mine Reconstruction and extension Project is studied by means of theoretical analysis, model test and numerical simulation. The research contents and achievements are as follows: (1) according to the design principles and methods of the retractable shaft lining joint of the frozen well, one vertical retractable shaft lining joint is set up for the new main shaft and the north wind well of Xutuan Coal Mine. The structural parameters of the retractable shaft lining joint of the frozen well are obtained, which are located at the cumulative depth of 357m and 353m, respectively, and the structural parameters of the retractable shaft lining joint of the frozen well are obtained. (2) the vertical, lateral and triaxial loading model tests of the retractable shaft lining joint are carried out by using the model test method. The test results show that the compression deformation rate of shaft wall joint can reach 47% under vertical loading, 48.8% under triaxial loading, and 29.16 MPA under lateral loading. It can be seen that the retractable shaft lining joint has good compression and waterproof properties. (3) the mechanical properties of retractable shaft lining joint are analyzed by numerical simulation method. The reliability of the numerical simulation analysis is verified by comparing the vertical bearing capacity of the shaft lining joint with the results of the model test. (4) according to the construction procedure of the inner layer of the frozen wellbore, the field construction technology of the retractable shaft lining joint of the frozen well is put forward. The retractable shaft wall joint of frozen well has been successfully applied in the new main shaft and Beifeng well of Xutuan Mine, and the corresponding design and construction technology can provide a reference for similar projects. The retractable shaft wall joint of frozen wells can be widely used in the construction, reconstruction and expansion of new wells in coal mines under similar formation conditions, which will produce greater social and economic benefits.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD265

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉樹彪;徐華生;榮傳新;姚直書;;特殊地層條件下凍結(jié)井壁豎向可縮性接頭試驗(yàn)研究[J];安徽建筑工業(yè)學(xué)院學(xué)報(bào)(自然科學(xué)版);2008年03期

2 楊俊杰,姚直書;立井襯砌鋼結(jié)構(gòu)豎向可縮接頭性能試驗(yàn)研究[J];工業(yè)建筑;2004年02期

3 王從平;趙厚勝;張連福;;凍結(jié)井筒豎向可縮性井壁接頭的設(shè)計(jì)研究[J];安徽建筑工業(yè)學(xué)院學(xué)報(bào)(自然科學(xué)版);2013年02期

4 蘇駿;鉆井井壁可縮性接頭位置的優(yōu)化分析[J];安徽理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2004年04期

5 陳偉緒,林鴻苞,王經(jīng)東;許疃礦井鉆井可縮性井壁綜合研究與設(shè)計(jì)[J];建井技術(shù);2002年03期

6 楊志江;蘇茂秋;武強(qiáng);宋雷;;郭屯煤礦副井井筒內(nèi)層可縮井壁結(jié)構(gòu)設(shè)計(jì)[J];建井技術(shù);2007年02期

7 楊志江,車平;管板組合式井壁可縮結(jié)構(gòu)的初步研究[J];山西建筑;2004年06期

8 蔡海兵;程樺;姚直書;榮傳新;程屏;;深凍結(jié)井筒豎向可縮井壁的設(shè)計(jì)與施工技術(shù)[J];煤炭工程;2008年07期

9 姚直書;宋海清;程樺;;高性能混凝土凍結(jié)井壁研制及主要力學(xué)性能試驗(yàn)研究[J];煤炭工程;2009年12期

10 裴慶夏;姚直書;張永坤;;信湖煤礦鉆井井筒可縮性井壁接頭設(shè)計(jì)及數(shù)值模擬研究[J];煤炭工程;2012年03期

，

本文編號(hào)：2479255