發(fā)布時(shí)間：2018-05-05 08:45

  本文選題：瓦斯綜合治理 + 瓦斯抽采��； 參考：《太原理工大學(xué)》2013年碩士論文

【摘要】：近年來(lái),隨著對(duì)煤炭資源的整合,國(guó)家加大了對(duì)煤礦安全生產(chǎn)的重視程度,頒布了一系列相關(guān)的法律、法規(guī)和規(guī)章制度。因此在煤炭產(chǎn)量逐步提升的同時(shí),煤礦事故數(shù)量呈現(xiàn)逐年下降、安全生產(chǎn)局面得到進(jìn)一步好轉(zhuǎn)的態(tài)勢(shì)。但統(tǒng)計(jì)近十年來(lái)發(fā)生的重特大事故數(shù)據(jù)可以看出,“瓦斯”仍然是威脅礦工生命安全、影響礦井高產(chǎn)高效生產(chǎn)的最主要因素。并且隨著礦井開(kāi)采向煤層深部延伸,瓦斯涌出量增大,“瓦斯治理”成為多數(shù)礦井尤其是高瓦斯礦井亟需解決的主要問(wèn)題。 本文在分析了多孔介質(zhì)中流體運(yùn)動(dòng)形態(tài)的基礎(chǔ)上研究了瓦斯在綜采工作面的運(yùn)移特征,在充分認(rèn)識(shí)瓦斯災(zāi)害的基礎(chǔ)上總結(jié)了不同的防治措施。并以高瓦斯礦井——陽(yáng)泉寺家莊煤礦15#煤層15108工作面的生產(chǎn)條件為背景,分別從瓦斯抽放和風(fēng)排瓦斯兩個(gè)方面進(jìn)行研究,尋找解決瓦斯問(wèn)題的綜合防治措施。 通過(guò)煤層瓦斯壓力、煤層透氣性系數(shù)、瓦斯含量等基礎(chǔ)參數(shù),預(yù)測(cè)該井田瓦斯相對(duì)涌出量為21.31m3/t,絕對(duì)瓦斯涌出量為197.29m3/min,屬高瓦斯礦井,估算出該礦井的瓦斯儲(chǔ)量。進(jìn)而從通風(fēng)能力、瓦斯涌出現(xiàn)狀等多方面進(jìn)行了瓦斯抽采必要性與可行性研究。根據(jù)該礦井的瓦斯涌出情況,提出回采工作面采前預(yù)抽、邊采邊抽與高抽巷抽放鄰近層卸壓瓦斯的綜合瓦斯抽采方法。經(jīng)過(guò)實(shí)際抽采效果觀測(cè),工作面瓦斯抽采總量平均為105.56m3/min,抽采率達(dá)到了80%以上,其中高抽巷抽采量平均保持在97m3/min左右,抽放濃度穩(wěn)定在37%左右,抽采效果穩(wěn)定。 該工作面在15#煤層頂板上方2.5m處布置一條瓦斯內(nèi)錯(cuò)尾巷,形成“U+I型通風(fēng)系統(tǒng)”。通過(guò)對(duì)該通風(fēng)方式下的風(fēng)排瓦斯效果分析,可看出內(nèi)錯(cuò)尾巷平均排瓦斯量為11.43m3/min,風(fēng)排率為42.41%,且工作面上隅角瓦斯?jié)舛葧r(shí)有超限的情況出現(xiàn)�？紤]到受頂板垮落的影響,未能充分發(fā)揮其作用,因此運(yùn)用Fluent軟件對(duì)其布置高度進(jìn)行了數(shù)值模擬研究。結(jié)果表明：適當(dāng)提高內(nèi)錯(cuò)尾巷高度能更加有效地解決上隅角瓦斯超限問(wèn)題,同時(shí)降低回風(fēng)巷瓦斯?jié)舛取?本文采用抽采與風(fēng)排瓦斯相結(jié)合的方法,對(duì)寺家莊煤礦瓦斯進(jìn)行了綜合治理。不僅改善了礦井的安全生產(chǎn)環(huán)境,而且抽采出的瓦斯可作為重要的能源資源得到充分利用。
[Abstract]:In recent years, with the integration of coal resources, the state has increased the importance of coal production safety, issued a series of relevant laws, regulations and rules. Therefore, the number of coal mine accidents is decreasing year by year, and the situation of safe production is getting better. However, according to the statistics of serious and serious accidents in recent ten years, "gas" is still the most important factor that threatens the lives of miners and affects the production of high production and high efficiency in coal mines. With the coal mine mining extending into the deep coal seam, the amount of gas emission increases, "gas control" has become the main problem that most mines, especially the high gas mine, need to solve. Based on the analysis of fluid movement in porous medium, the characteristics of gas migration in fully mechanized coal mining face are studied in this paper, and different prevention measures are summarized on the basis of fully understanding of gas disaster. Based on the production conditions of 15108 coal face in No. 15# coal seam of high gas mine-Yangquan Sijiazhuang Coal Mine, this paper studies the gas drainage and gas drainage from two aspects, and looks for the comprehensive prevention measures to solve the gas problem. Based on the basic parameters of coal seam gas pressure, coal seam permeability coefficient and gas content, it is predicted that the relative gas emission of this mine is 21.31 m3 / t, and the absolute gas emission is 197.29 m3 / min, which is a high gas mine, and the gas reserves of this mine are estimated. Furthermore, the necessity and feasibility of gas drainage are studied from ventilation capacity, gas emission status and so on. According to the situation of gas emission in this mine, a comprehensive method of gas extraction is put forward, which is pre-drainage before mining, drainage while mining and high drainage roadway to drain the unpressurized gas from adjacent strata. Through the observation of the actual drainage effect, the average total amount of gas extraction is 105.56 m3 / min, and the extraction rate is more than 80%, in which the average drainage quantity of high drainage roadway is about 97m3/min, the drainage concentration is about 37%, and the extraction effect is stable. In this face, a gas staggered tail roadway is arranged at 2.5 m above the roof of No. 15 coal seam to form "U I ventilation system". Through the analysis of the effect of air drainage in this ventilation mode, it can be seen that the average amount of gas discharged is 11.43 m3 / min, the air discharge rate is 42.41 / min, and the gas concentration in the upper corner of the working face is in excess of the limit when the gas concentration in the upper corner of the working face is exceeded. Considering the influence of roof caving, it can not give full play to its function, so the Fluent software is used to simulate its layout height. The results show that properly raising the height of the inner staggered tail roadway can effectively solve the problem of gas over-limit in the upper corner and reduce the gas concentration in the return air tunnel. In this paper, the comprehensive control of the gas in Sijiazhuang coal mine is carried out by the method of combining drainage with air drainage. It not only improves the safe production environment of mine, but also makes full use of the gas extracted as an important energy resource.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TD712.6

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