發(fā)布時(shí)間：2018-04-10 10:56

  本文選題：瓦斯超限 + 瓦斯涌出�。粎⒖迹�《內(nèi)蒙古科技大學(xué)》2017年碩士論文

【摘要】：我國(guó)煤礦的開(kāi)采范圍不斷擴(kuò)大,而且開(kāi)采強(qiáng)度也在逐漸增大,礦井的瓦斯問(wèn)題也逐步凸顯,而且部分煤礦為高瓦斯礦井。高瓦斯礦井的主要特征有:導(dǎo)致瓦斯事故發(fā)生的因素多、危害的范圍廣泛、造成的后果嚴(yán)重等。深入研究煤層瓦斯抽放的相關(guān)理論,合理布置瓦斯抽放的工藝參數(shù),采用先進(jìn)可行的采煤工藝,選擇合理的工作面通風(fēng)方式,強(qiáng)化瓦斯日常管理,使得瓦斯治理方法和各種瓦斯防治工藝參數(shù)合理可行,這些瓦斯治理內(nèi)容都需要進(jìn)行進(jìn)一步進(jìn)行研究、論證。所以,我們必須將前人的寶貴經(jīng)驗(yàn)積累起來(lái),根據(jù)高瓦斯礦井的實(shí)際情況,提高技術(shù)水平,防止事故發(fā)生。保德煤礦在2015年度鑒定為高瓦斯礦井,與其他煤礦相比,其瓦斯涌出的特點(diǎn)有以下幾方面:煤層瓦斯涌出的相對(duì)量不大而絕對(duì)涌出量較大、煤礦工作面的局部瓦斯發(fā)生積聚加劇、工作面瓦斯涌出量主要來(lái)源于采空區(qū)、礦井瓦斯分布的不均衡性以及瓦斯涌出。根據(jù)保德煤礦開(kāi)采技術(shù)條件及煤層瓦斯賦存狀況,對(duì)81306綜放工作面的瓦斯涌出情況進(jìn)行研究,通過(guò)分析81306綜放工作面預(yù)抽煤層、采空區(qū)及工作面瓦斯涌出規(guī)律,結(jié)合綜放工作面的實(shí)際,準(zhǔn)確地計(jì)算出瓦斯來(lái)源,為瓦斯治理工作提供了科學(xué)依據(jù)。瓦斯的涌出量較大發(fā)生在放頂煤的時(shí)候;而割煤的時(shí)候,采煤工作面的瓦斯涌出量就會(huì)變小。當(dāng)工作面放頂煤和割煤一同進(jìn)行的時(shí)候,礦井的瓦斯涌出量達(dá)到最大,極易發(fā)生瓦斯超限。治理81306綜放工作面瓦斯的研究方法是減小工作面瓦斯的涌出,而在工作面瓦斯涌出量不大時(shí)可以使用抑制瓦斯涌出的方法。本論文治理礦井瓦斯采用尾巷以及采空區(qū)埋管;沿頂板走向打鉆孔;預(yù)抽采煤層中的瓦斯等方法進(jìn)行治理。本論文根據(jù)保德煤礦實(shí)際情況,主要采用預(yù)抽煤層瓦斯、改善通風(fēng)系統(tǒng)、改變通風(fēng)方式(增加進(jìn)風(fēng)巷或回風(fēng)巷)、采用均壓通風(fēng)、減少通風(fēng)設(shè)施的漏風(fēng)量和減小通風(fēng)阻力、采用地面鉆孔和頂板走向鉆孔、采用尾巷和高抽巷等方法,從而解決瓦斯事故問(wèn)題。選用更高的技術(shù)防治綜放開(kāi)采煤礦重大瓦斯災(zāi)害等問(wèn)題,使保德煤礦實(shí)現(xiàn)了高安全、高產(chǎn)和高效的目的。
[Abstract]:The mining range of our country's coal mine is expanding, and the mining intensity is increasing gradually, the gas problem of the mine is also gradually prominent, and some coal mines are high gas mines.The main characteristics of high gas mine are as follows: many factors lead to gas accident, wide range of harm, serious consequences and so on.The related theories of coal seam gas drainage are deeply studied, the technological parameters of gas drainage are reasonably arranged, the advanced and feasible coal mining technology is adopted, the reasonable ventilation mode of working face is selected, and the daily gas management is strengthened.The method of gas control and various technological parameters of gas prevention and control are reasonable and feasible, which need to be further studied and demonstrated.Therefore, we must accumulate the valuable experience of predecessors, according to the actual situation of high gas mine, improve the technical level and prevent accidents.Baode Coal Mine was identified as a high gas mine in 2015. Compared with other coal mines, the characteristics of gas emission are as follows: the relative quantity of coal seam gas emission is small and the absolute emission quantity is large.The local gas accumulation in the coal face is intensified, the gas emission is mainly from the goaf, the unbalance of the gas distribution in the mine and the gas emission.According to the technical conditions of mining in Baode coal mine and the situation of gas occurrence in coal seam, the gas emission from 81306 fully mechanized caving face is studied. Through the analysis of the law of gas emission in coal seam, goaf and working face of 81306 fully mechanized caving face, pre-drainage coal seam, goaf and working face are analyzed.Combined with the practice of fully mechanized caving face, the gas source is calculated accurately, which provides scientific basis for gas control.The large amount of gas emission occurs in top coal caving, but when cutting coal, the gas emission of coal face will become smaller.When the top coal caving and cutting coal are carried out together, the gas emission of the mine reaches the maximum, and the gas is easily overrun.The research method of controlling gas in 81306 fully mechanized caving face is to reduce the gas emission in working face, but the method of restraining gas emission can be used when the amount of gas emission in working face is small.In this paper, the gas in coal mine is treated by the methods of tail roadway and goaf buried pipe, drilling hole along the roof, and gas in the coal seam.According to the actual situation of Baode Coal Mine, this paper mainly adopts pre-drainage of coal seam gas, improvement of ventilation system, change of ventilation mode (increase air entry or return air tunnel, use equal pressure ventilation, reduce air leakage and ventilation resistance of ventilation facilities.In order to solve the gas accident problem, the surface drilling and roof strike drilling are adopted, and the methods of tail roadway and high drainage roadway are adopted to solve the gas accident problem.The selection of higher technology to prevent and cure major gas disasters in fully mechanized caving caving coal mine makes Baode Coal Mine achieve high safety, high yield and high efficiency.
【學(xué)位授予單位】：內(nèi)蒙古科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD712.5

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本文編號(hào)：1730904