本文選題：瓦斯隧道 + 等級(jí)劃分�。� 參考：《西南交通大學(xué)》2015年碩士論文

【摘要】：目前,我國(guó)西南地區(qū)的穿煤瓦斯隧道建設(shè)量逐漸增多,新建隧道較多為雙線高速客專(zhuān)的大斷面隧道,極大地提高加了工程建設(shè)難度。但是我國(guó)的《鐵路瓦斯隧道技術(shù)規(guī)范》(TB10120-2002)規(guī)定的瓦斯隧道分類(lèi)方法比較單一,沒(méi)有考慮到隧道斷面大小的影響,條文說(shuō)明的解釋也比較模糊。而且煤與瓦斯突出預(yù)測(cè)等揭煤防突技術(shù)基本上都是從煤礦部門(mén)直接引入或稍作改進(jìn)后直接應(yīng)用,常規(guī)預(yù)測(cè)方法費(fèi)時(shí)費(fèi)力,而且有些指標(biāo)測(cè)定的精確度不高。鑒于此,對(duì)瓦斯隧道分類(lèi)和煤與瓦斯突出技術(shù)的研究很有必要。在國(guó)內(nèi)外研究的基礎(chǔ)上,本文開(kāi)展的主要研究以及所取得的成果如下：(1)根據(jù)國(guó)內(nèi)外對(duì)瓦斯隧道的研究和瓦斯隧道施工經(jīng)驗(yàn),通過(guò)分析瓦斯?jié)舛�、隧道通風(fēng)和隧道斷面面積等主要影響因素,提出了適合于各種常見(jiàn)斷面的瓦斯隧道分類(lèi)方法。(2)鐵路瓦斯隧道類(lèi)別按照隧道工區(qū)最高界別劃定。對(duì)于Ⅰ類(lèi)斷面隧道(40～80m2),微瓦斯與低瓦斯隧道工區(qū)的分界值為0.1m3/min,低瓦斯與高瓦斯隧道工區(qū)的分界值為0.7m3/min；對(duì)于Ⅱ類(lèi)斷面隧道(80-120m2)的分類(lèi)界限值分別為0.3m3/min和1.4m3/min；對(duì)于Ⅲ類(lèi)斷面隧道(120-160m2)的分類(lèi)界限值分別為0.5m3/min和2.1m3/min;對(duì)于Ⅳ類(lèi)斷面隧道(160m2)的分類(lèi)界限值分別為0.7 m3/min和2.8m3/min；其中只要工區(qū)內(nèi)有一處具有突出危險(xiǎn)則該工區(qū)就判定為煤與瓦斯突出工區(qū)。(3)根據(jù)煤與瓦斯突出綜合作用機(jī)理,選取了瓦斯壓力、地質(zhì)構(gòu)造、煤體結(jié)構(gòu)類(lèi)型、煤體堅(jiān)固系數(shù)、瓦斯放散初速度和隧道穿煤段垂直埋深6個(gè)影響因素建立了一個(gè)BP神經(jīng)網(wǎng)絡(luò)預(yù)測(cè)模型(6個(gè)輸入節(jié)點(diǎn),11個(gè)隱層節(jié)點(diǎn),2個(gè)輸出節(jié)點(diǎn))。并用25組國(guó)內(nèi)典型煤層突出樣本對(duì)網(wǎng)絡(luò)進(jìn)行訓(xùn)練學(xué)習(xí),用國(guó)內(nèi)已建的10座瓦斯隧道進(jìn)行判定驗(yàn)證,正確率達(dá)到90%,僅有一座無(wú)突出危險(xiǎn)的隧道驗(yàn)證為具有突出危險(xiǎn)。(4)用已訓(xùn)練好的網(wǎng)絡(luò)對(duì)成貴線玉京山隧道、高坡隧道和觀音山隧道進(jìn)行突出預(yù)測(cè),結(jié)果顯示玉京山隧道和觀音山隧道無(wú)突出危險(xiǎn),而高坡隧道具有一定的煤與瓦斯突出危險(xiǎn)。這個(gè)預(yù)測(cè)結(jié)果可作為設(shè)計(jì)施工時(shí)的一個(gè)參考,實(shí)際結(jié)果還需要實(shí)際施工驗(yàn)證。
[Abstract]:At present, the construction quantity of coal and gas tunnel in southwest China is increasing gradually, and the newly built tunnels are mostly large section tunnels with double lines and high speed, which greatly increases the difficulty of engineering construction. However, the classification method of gas tunnel stipulated by TB10120-2002 in our country is relatively simple, which does not take into account the influence of tunnel section size, and the interpretation of the provisions is rather vague. In addition, coal and gas outburst prediction and other uncovering coal outburst prevention techniques are all introduced directly from the coal mine departments or applied directly after a slight improvement. The conventional prediction methods are time-consuming and laborious, and the accuracy of some indexes is not high. In view of this, it is necessary to study the classification of gas tunnel and the technology of coal and gas outburst. Based on the research at home and abroad, the main research and the results obtained in this paper are as follows: 1) according to the domestic and foreign research on gas tunnel and the construction experience of gas tunnel, through the analysis of gas concentration, The main influencing factors, such as tunnel ventilation and tunnel cross-section area, are put forward. The classification method of gas tunnel suitable for various common sections is put forward. 2) the category of railway gas tunnel is delimited according to the highest subsector of tunnel working area. For type I cross-section tunnel, the boundary value is 0.1m3 / min for micro-gas and low-gas tunnel, 0.7m3 / min for low-gas and high-gas tunnel, and 0.3m3/min and 1.4m3 / min for type 鈪，

本文編號(hào)：1971534