本文關(guān)鍵詞： 標(biāo)志性氣體 能位分布 漏風(fēng)測(cè)試 示蹤氣體 熱像特征　出處：《安徽理工大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：針對(duì)下分層工作面容易出現(xiàn)漏風(fēng)誘發(fā)煤炭自燃,且因下分層工作面條件復(fù)雜,直接、準(zhǔn)確定位煤自燃區(qū)域難度大的問(wèn)題,本文從下分層工作面自燃產(chǎn)生的原因、條件、監(jiān)測(cè)與預(yù)警以及防治方法等方面,系統(tǒng)探討了下分層工作面煤自燃問(wèn)題。采集現(xiàn)場(chǎng)煤樣并分析了煤樣自燃特性,測(cè)試了煤升溫氧化過(guò)程中的氣體產(chǎn)出特征,優(yōu)選了煤自燃的標(biāo)志性氣體,研究了氣體產(chǎn)物生成量與煤溫之間的關(guān)系,確定了預(yù)測(cè)預(yù)報(bào)煤自燃標(biāo)志性氣體的指標(biāo)值。在工作面能位分布測(cè)試的基礎(chǔ)上,利用便攜式SF6檢測(cè)儀,采用移動(dòng)檢測(cè)點(diǎn)的方法,測(cè)算了大面積范圍漏風(fēng)的最短路徑,確定了下分層工作面頂板漏風(fēng)風(fēng)速和漏風(fēng)量,圈定了煤層自燃的漏風(fēng)供氧區(qū)域,為監(jiān)測(cè)下分層工作面自燃與防控提供了理論依據(jù)。采用布置測(cè)溫和測(cè)氣裝置,并借助紅外熱成像儀,觀測(cè)了工作面兩巷高溫區(qū)域,辨識(shí)了煤自燃發(fā)生早期征兆,制定了工作面綜合防滅火措施。己16-17-22072工作面試驗(yàn)研究結(jié)果表明:測(cè)試的煤樣自燃傾向性等級(jí)為Ⅰ級(jí),屬于容易自燃煤。煤樣常溫下氧化氣體產(chǎn)物中不僅有CO和C02,甚至出現(xiàn)了 C2H4和C2H6,表明了煤樣具有很強(qiáng)的氧化性。當(dāng)出現(xiàn)CO時(shí),說(shuō)明煤溫達(dá)到了 70℃,出現(xiàn)C3H8時(shí),煤溫已達(dá)到110℃。由于試驗(yàn)工作面頂板密實(shí)程度不一,漏風(fēng)具有層狀特征,但漏風(fēng)量分布不均,最大漏風(fēng)地點(diǎn)在F1斷層附近,是煤自燃易發(fā)區(qū)段;最小漏風(fēng)地點(diǎn)在距初切眼370m～680m范圍內(nèi)。紅外熱成像及定點(diǎn)觀測(cè)的氣體和溫度監(jiān)測(cè)結(jié)果驗(yàn)證了漏風(fēng)測(cè)試結(jié)果的準(zhǔn)確性。通過(guò)在工作面風(fēng)巷頂板噴注高分子材料,形成擋風(fēng)隔離墻等防治措施,有效控制了煤自燃進(jìn)程。研究結(jié)果為類(lèi)似條件下的煤自燃防治提供了借鑒作用。
[Abstract]:In view of the coal spontaneous combustion caused by air leakage in the lower stratified working face, and because of the complicated condition, direct and accurate location of the coal spontaneous combustion area, this paper analyzes the causes of spontaneous combustion in the lower stratified working face. In terms of conditions, monitoring and early warning, and prevention and control methods, this paper systematically discusses the problem of coal spontaneous combustion in the lower stratified working face, collects the spot coal samples and analyzes the spontaneous combustion characteristics of the coal samples. The characteristics of gas production in the process of coal heating and oxidation were tested, the signature gas of coal spontaneous combustion was selected, and the relationship between the amount of gas product and coal temperature was studied. Based on the test of energy level distribution in the working face, the portable SF6 detector is used to detect the moving points. The shortest path of air leakage in a large area is calculated, the wind speed and air leakage amount of roof air leakage are determined, and the air leakage oxygen supply area of spontaneous combustion of coal seam is delineated. This paper provides a theoretical basis for monitoring the spontaneous combustion and prevention and control of the lower stratified working face. The early signs of coal spontaneous combustion are identified by using the arrangement of temperature measurement and gas measuring device and the infrared thermal imager to observe the high temperature area of the two roadways of the working face and to identify the early signs of coal spontaneous combustion. The comprehensive fire prevention and extinguishing measures have been established. The experimental results of 16-17-22072 face show that the spontaneous combustion tendency of the coal samples tested is grade 鈪，

本文編號(hào)：1463414