本文選題：低透氣性煤層　切入點(diǎn)：高壓空氣　出處：《遼寧工程技術(shù)大學(xué)》2013年博士論文

【摘要】：本文針對(duì)煤礦區(qū)煤層透氣性差、煤質(zhì)松軟等特點(diǎn)，開(kāi)展低透氣性煤層井下增透技術(shù)與裝備研究。通過(guò)對(duì)高能空氣沖擊波破壞煤體的試驗(yàn)，研究不同煤體的瓦斯運(yùn)移規(guī)律與破壞量，同時(shí)通過(guò)對(duì)井下移動(dòng)式空氣加壓泵站的研制，為低透氣性煤層增透和抽采技術(shù)提供一整套裝備與技術(shù)，解決低透氣性煤層抽采難題，，使低透氣性煤層瓦斯抽采率提高40%～50%，從而預(yù)防并防止重特大煤礦事故的發(fā)生，以期為煤礦安全生產(chǎn)提供理論及實(shí)踐支撐。 首先，在總結(jié)前人研究成果的基礎(chǔ)上，應(yīng)用煤層瓦斯賦存流動(dòng)理論，詳細(xì)分析和探討了高壓空氣對(duì)煤體的沖擊作用及增透作用。實(shí)驗(yàn)選取30組煤樣，分別選自阜新礦業(yè)集團(tuán)下的艾友煤礦和海州煤礦，對(duì)其中10組煤樣進(jìn)行抗壓實(shí)驗(yàn)，對(duì)其余20組煤樣進(jìn)行煤樣滲透率變化實(shí)驗(yàn)，記錄下實(shí)驗(yàn)過(guò)程中煤樣的參數(shù)變化值，通過(guò)對(duì)物理參數(shù)變化值和實(shí)驗(yàn)參數(shù)變化值的計(jì)算的得到氣爆前后煤樣的滲透率。 實(shí)驗(yàn)結(jié)果表明： （1）氣爆后煤樣的滲透率增大，平均提高了81%以上。 （2）氣爆后，煤樣的滲透率增量隨著高壓氣體壓力的增大而增大。分析進(jìn)行抗壓實(shí)驗(yàn)的10組煤樣，其滲透率的增量與氣爆壓力呈冪函數(shù)關(guān)系。 （3）煤質(zhì)較硬的煤樣氣爆后滲透率增量較大。 其次，根據(jù)煤體變形、破裂依據(jù)和滲流力學(xué)的基本原理，建立關(guān)于煤體變形、破裂和瓦斯流動(dòng)相互作用的數(shù)學(xué)模型，并開(kāi)發(fā)基于耦合數(shù)學(xué)模型的數(shù)值模擬軟件，對(duì)現(xiàn)場(chǎng)實(shí)際高壓氣體沖擊前、后方案進(jìn)行對(duì)比模擬、分析和評(píng)價(jià)。 最后，通過(guò)對(duì)引進(jìn)的高壓空氣壓縮機(jī)組的二次開(kāi)發(fā)，完善提高其驅(qū)動(dòng)方式及防爆等級(jí)，研制出高壓空氣單點(diǎn)、多點(diǎn)釋放裝置，并進(jìn)行井下煤層增透工藝性試驗(yàn)，為低透氣性煤層煤層氣強(qiáng)化抽采提供有效了一種新途徑。 本項(xiàng)研究是國(guó)內(nèi)外首次基于高能空氣爆破、沖擊、破碎煤體試驗(yàn)，研制了低透氣性煤層增透技術(shù)與裝備，用于低透氣性煤層煤層氣的強(qiáng)化抽采。該項(xiàng)研究獲得了“高壓氣體沖擊破裂煤體瓦斯預(yù)抽方法與裝備”一項(xiàng)發(fā)明專利。在雙鴨山礦業(yè)集團(tuán)新安煤礦進(jìn)行的工程應(yīng)用檢驗(yàn)取得了較好的驗(yàn)證效果，從而解決低透氣性煤層抽采難題，使低透氣性煤層瓦斯抽采率提高40%～50%，從而預(yù)防并防止重特大煤礦事故的發(fā)生，以期為煤礦安全生產(chǎn)提供理論及實(shí)踐支撐。
[Abstract]:Aiming at the characteristics of coal seam permeability and soft coal in coal mine area, this paper studies the antireflection technology and equipment of low permeability coal seam.Through the test of high energy air shock wave to destroy coal body, the law of gas migration and damage quantity of different coal bodies are studied. At the same time, through the development of underground mobile air pressure pump station,To provide a whole set of equipment and technology for low permeability coal seam antireflection and extraction technology, to solve the problem of low permeability coal seam extraction, to increase the gas extraction rate of low permeability coal seam by 40% and 50%, thus to prevent and prevent the occurrence of serious and serious coal mine accidents.In order to provide theoretical and practical support for coal mine safety production.Firstly, on the basis of summarizing the previous research results, the impact and antireflection effects of high pressure air on coal body are analyzed and discussed in detail by applying the theory of coal seam gas occurrence and flow.Thirty groups of coal samples were selected from Aiyou Coal Mine and Haizhou Coal Mine of Fuxin Mining Group respectively. Ten groups of coal samples were tested under compressive pressure and the other 20 groups of coal samples were tested on permeability change of coal samples.The change value of coal sample parameters is recorded and the permeability of coal sample before and after gas explosion is obtained by calculating the change values of physical parameters and experimental parameters.The experimental results show that:1) the permeability of coal samples increases by more than 81% after gas explosion.2) after gas explosion, the increase of coal permeability increases with the increase of high pressure gas pressure.The relationship between permeability increment and gas burst pressure is power function for 10 groups of coal samples.3) the permeability increment of coal samples with hard coal quality is larger after gas explosion.Secondly, according to the basic principles of coal deformation, fracture and seepage mechanics, the mathematical model of coal deformation, fracture and gas flow interaction is established, and the numerical simulation software based on coupling mathematical model is developed.Before and after the actual high pressure gas impact, the simulation, analysis and evaluation were carried out.Finally, through the secondary development of the imported high-pressure air compressor unit, the driving mode and the explosion-proof grade are improved, the high-pressure air single-point and multi-point releasing device is developed, and the anti-reflection process test of underground coal seam is carried out.It provides a new effective way for coal bed methane extraction in low permeability coal seam.This research is the first time in China and abroad based on high energy air blasting, impact, crushing coal body test, developed low permeability coal seam antireflection technology and equipment, used in low permeability coal seam coal bed methane extraction.This research has obtained the invention patent of "coal body gas pre-drainage method and equipment under high pressure gas impact rupture".The engineering application test carried out in Xinan Coal Mine of Shuangyashan Mining Group has achieved good verification effect, thus solving the problem of extraction of low permeability coal seam.The gas drainage rate of low permeability coal seam can be increased by 40% and 50%, so as to prevent and prevent the occurrence of serious and serious coal mine accidents, in order to provide theoretical and practical support for coal mine safety production.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2013
【分類號(hào)】：TD712.6

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