發(fā)布時(shí)間：2018-01-09 08:02

  本文關(guān)鍵詞：平溝煤礦瓦斯抽采工藝研究　出處：《內(nèi)蒙古科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 瓦斯抽采工藝 低透氣性煤層 水力壓裂技術(shù)

【摘要】：瓦斯災(zāi)害是煤礦五大災(zāi)害之一,其長(zhǎng)期制約著我國(guó)煤礦的安全生產(chǎn),瓦斯的防治工作更是尤為重要。放頂煤是是厚煤層開采的一種重要方法,其開采工藝決定了采空區(qū)遺煤較多,遺煤所釋放瓦斯就會(huì)急劇增加,更加容易導(dǎo)致綜采工作面瓦斯超限問(wèn)題的發(fā)生。如何采取有效措施實(shí)現(xiàn)安全高效開采成為擺在采礦工作者面前的重要任務(wù)。特定條件下,煤層采前預(yù)抽也是一種有效的區(qū)域性預(yù)防突出的技術(shù)措施,它對(duì)煤層賦存條件的要求較低,施工容易,成本較低。隨著煤礦范圍的擴(kuò)大、開采深度的增加,瓦斯災(zāi)害日益加劇,由于受礦井采掘布置的影響,在礦井許多區(qū)域有必要采用下向鉆孔進(jìn)行瓦斯抽采,所以,對(duì)綜放面瓦斯鉆孔抽采技術(shù)的研究,具有十分重要的實(shí)際意義。本論文以平溝煤礦為基礎(chǔ),針對(duì)平溝煤礦為高瓦斯低透氣性煤層,煤層透氣性系數(shù)小,瓦斯抽采效率低的實(shí)際情況,進(jìn)行深入分析。平溝煤礦主采9#、10#、16#煤層,按突出礦井管理。瓦斯問(wèn)題困擾著工作面采掘接替,給礦井安全生產(chǎn)帶來(lái)了隱患,限制了礦井的高產(chǎn)高效。1605工作面鉆孔瓦斯抽采困難,僅有10%左右的瓦斯抽放率,抽采難達(dá)標(biāo)、煤層透氣性系數(shù)低、衰減快、瓦斯含量大、瓦斯壓力高。對(duì)于低透氣性突出煤層而言,煤體透氣性極差,采用常規(guī)的鉆孔布置方式及參數(shù)預(yù)抽煤層瓦斯時(shí),往往達(dá)不到所要求的抽放效果。為此,需采用強(qiáng)化抽采瓦斯方法,通過(guò)水力壓裂技術(shù),人為強(qiáng)迫溝通煤層內(nèi)的原有裂隙網(wǎng)絡(luò)或產(chǎn)生新的裂隙網(wǎng)絡(luò),使煤體透氣性增加,提高煤層瓦斯抽采效率。先根據(jù)理論分析和數(shù)值模擬及現(xiàn)場(chǎng)實(shí)際情況,設(shè)計(jì)或調(diào)整確定出設(shè)備的結(jié)構(gòu)與工藝參數(shù),然后研究高瓦斯高應(yīng)力低透氣性煤層有效卸壓排放瓦斯的水力壓裂技術(shù)措施,并進(jìn)行試驗(yàn),根據(jù)試驗(yàn)結(jié)果,對(duì)上述研究成果進(jìn)行驗(yàn)證和修正。該技術(shù)增加煤層透氣性,強(qiáng)化煤礦瓦斯抽采與利用,在源頭上遏制重大惡性事故發(fā)生,是煤礦瓦斯治理、抽采與利用的新途徑、新技術(shù)和新工藝,在節(jié)能減排、提高資源回收率等方面具有重大意義。保障煤礦安全生產(chǎn),減少人員傷亡;解放煤礦生產(chǎn)力,實(shí)現(xiàn)礦井高產(chǎn)高效;改善井下作業(yè)環(huán)境,維護(hù)煤炭職工的健康;變廢為寶,變害為利,為實(shí)現(xiàn)煤礦安全形勢(shì)的根本好轉(zhuǎn)而努力,經(jīng)濟(jì)和社會(huì)效益顯著,具有廣闊的推廣應(yīng)用前景。
[Abstract]:Gas disaster is one of the five major coal mine disasters, the long-term constraints of China's coal mine production safety, gas prevention and control work is particularly important. The top coal is is an important method in the thick seam mining, the mining process determines the coal goaf left coal more, the release of gas will increase sharply, more easily lead to fully mechanized coal face gas overrun problem. How to take effective measures to achieve the safe and efficient mining has become an important task for mining engineers. Under certain conditions, coal seam drainage before mining is a kind of effective prevention of regional technical measures for coal seam conditions and low requirement, easy construction and the cost is low. With the expansion of the scope of the coal mine, the increase of mining depth, the gas disaster is increasing, due to the mining layout of mine, mine in many areas is necessary to drill for tile This extraction, therefore, in fully mechanized caving face mining technology of gas drainage, and has very important practical significance. This thesis is based on the Pinggou coal mine, in Pinggou coal mine for high gas and low permeability coal seam, coal seam permeability coefficient is small, the actual situation of the low efficiency of mining gas drainage, in-depth analysis 9#, the main mining Pinggou coal mine 10# coal seam 16#, according to the management of gas outburst mine. Problems of working face mining, brings hidden trouble to the safety of mine production, limiting high yield and high efficiency of.1605 working face gas mine drainage difficulty, gas drainage rate is only about 10%, extraction difficult compliance, coal seam permeability coefficient is low, attenuation, high gas content and high gas pressure. For low permeability outburst coal seam, coal permeability range, using borehole layout mode and the parameters of the conventional gas pre drainage, drainage effect are often not up to the requirements. Therefore, the strengthening of gas drainage method, the hydraulic fracturing technology, forced the network communication in the coal original cracks or cracks network, make the coal permeability increase, coal seam gas drainage efficiency. According to the theoretical analysis and numerical simulation and the actual situation, determine the structure and the design or adjustment the process parameters of equipment, technical measures of hydraulic fracturing and high gas and high stress and low permeability coal seam effective pressure relief gas drainage, and test according to the test results, verify and revise the above research results. This technique increases the permeability of the coal seam, strengthen coal mine gas drainage and utilization, the occurrence of major accidents containment at the source, is the coal mine gas control, drainage and utilization of new ways, new technology and new technology in energy saving and emission reduction, it is of great significance to improve the recovery rate of resources. To ensure mine safety The whole production, reduce casualties; the liberation of coal mine productivity, achieve high yield and efficiency of mine; improving the underground working environment, maintenance of coal workers' health; treasure, variable harm into, and efforts to achieve a fundamental improvement in the security situation of the coal mine, significant economic and social benefits, and has broad application prospects.

【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)】：TD712.6

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