本文選題：瓦斯抽放 + 數(shù)值分析��； 參考：《內(nèi)蒙古科技大學(xué)》2013年碩士論文

【摘要】：由于單純依靠通風(fēng)并不能徹底解決黃白茨礦1295綜采工作面瓦斯超限的問題，所以可以采用瓦斯抽放的措施來解決該工作面瓦斯超限的問題。對(duì)瓦斯抽放的研究，歸根到底就是對(duì)瓦斯抽放參數(shù)的研究。 本論文正是基于這一點(diǎn)，采用理論分析計(jì)算與數(shù)值模擬相結(jié)合的方法，對(duì)1295綜采工作面瓦斯抽放參數(shù)進(jìn)行了研究。首先在黃白茨礦12#煤層現(xiàn)場(chǎng)及實(shí)驗(yàn)室測(cè)定了煤層的瓦斯吸附常數(shù)、煤樣孔隙率、視密度、水分、煤層的瓦斯含量、煤層的透氣性系數(shù)和鉆孔瓦斯涌出量衰減系數(shù)。綜合黃白茨礦12#煤層1295綜采工作面的實(shí)際情況，分析了綜采工作面瓦斯來源主要是：本煤層瓦斯涌出，下鄰近層瓦斯涌出和采空區(qū)瓦斯涌出。在分析瓦斯源的基礎(chǔ)上，采用分源預(yù)測(cè)法，預(yù)測(cè)了各個(gè)瓦斯涌出源的瓦斯涌出量，通過計(jì)算得出：本煤層和采空區(qū)瓦斯涌出量占工作面瓦斯涌出量的86%，因此提出了本煤層和采空區(qū)相結(jié)合的瓦斯抽放方法。其次從安全、經(jīng)濟(jì)、煤層賦存條件、瓦斯涌出量等方面考慮，綜合分析了常用瓦斯抽放方法的優(yōu)缺點(diǎn)及其適用條件，確定了順層鉆孔抽放法和采空區(qū)插管法相結(jié)合的瓦斯抽放方法。在確定瓦斯抽放方法的基礎(chǔ)上，，主要對(duì)瓦斯抽放方法中的鉆孔間距、瓦斯抽放合理時(shí)間及鉆孔的深度進(jìn)行了理論分析。通過相對(duì)壓力指標(biāo)法確定了鉆孔的合理間距；通過瓦斯涌出理論確定了鉆孔的合理深度；通過鉆孔瓦斯涌出量的衰減性隨著時(shí)間而有規(guī)律的變化來確定鉆孔的合理抽放時(shí)間。最后在理論分析的基礎(chǔ)上，通過FLUENT數(shù)值模擬鉆孔周圍瓦斯壓力隨著不同時(shí)間的變化情況，驗(yàn)證了鉆孔的間距和合理的抽放時(shí)間與理論計(jì)算的結(jié)果相一致。 通過對(duì)瓦斯抽放參數(shù)的優(yōu)化，明顯提高了瓦斯抽放效率，瓦斯抽放的濃度也有所提高，回風(fēng)巷中瓦斯?jié)舛扔辛嗣黠@地降低，工作面斷電次數(shù)減少，確保了工作面安全、高效地進(jìn)行生產(chǎn)。這些效果也間接地產(chǎn)生了經(jīng)濟(jì)效益：抽放瓦斯?jié)舛鹊奶岣�，為瓦斯的利用提供了資源；工作面斷電次數(shù)減少，確保了煤炭產(chǎn)量。通過對(duì)抽放鉆孔間距、抽放鉆孔時(shí)間及抽放鉆孔的深度等參數(shù)的理論分析與數(shù)值模擬，為黃白茨礦的綜合瓦斯抽放提供一個(gè)科學(xué)的、量化的參考依據(jù)。
[Abstract]:Since ventilation alone can not completely solve the problem of gas exceeding limit in No. 1295 fully mechanized mining face of Huangbai Coal Mine, the measures of gas drainage can be adopted to solve the problem of gas exceeding limit in this working face. The study of gas drainage is, in the final analysis, the study of gas drainage parameters. Based on this point, this paper studies the gas drainage parameters of 1295 fully mechanized coal face by combining theoretical analysis and numerical simulation. At first, the gas adsorption constant, apparent density, moisture content, gas permeability coefficient of coal seam and attenuation coefficient of gas emission from borehole were measured in the coal seam No. 12 of Huangbai Coal Mine. Based on the actual situation of No. 1295 fully mechanized mining face in No. 12 coal seam of Huangbai Coal Mine, the gas sources of fully mechanized coal face are analyzed as follows: gas emission from the coal seam, gas emission from the lower adjacent strata and gas emission from the goaf. Based on the analysis of the gas source, the gas emission quantity of each gas emission source is predicted by using the method of source separation prediction. It is concluded by calculation that the amount of gas emission in this coal seam and goaf accounts for 86% of the gas emission in the working face, so a gas drainage method combining the coal seam and the goaf is put forward. Secondly, from the aspects of safety, economy, coal seam occurrence condition, gas emission quantity and so on, the advantages and disadvantages of common gas drainage methods and their applicable conditions are analyzed synthetically. The gas drainage method combined with borehole drainage method and goaf intubation method was determined. On the basis of determining the method of gas drainage, the interval between boreholes, the reasonable time of gas drainage and the depth of borehole in the method of gas drainage are analyzed theoretically. The reasonable spacing of borehole is determined by relative pressure index method, the reasonable depth of borehole is determined by gas emission theory, and the reasonable drainage time is determined by the attenuation of gas emission from borehole with time. Finally, on the basis of theoretical analysis, the variation of the gas pressure around the borehole with different time is simulated by FLUENT numerical simulation, which verifies that the interval between the boreholes and the reasonable drainage time are consistent with the theoretical calculation results. By optimizing the parameters of gas drainage, the efficiency of gas drainage is obviously improved, the concentration of gas drainage is also increased, the gas concentration in the return air roadway is obviously reduced, the number of power cuts in the working face is reduced, and the safety of the working face is ensured. Produce efficiently. These effects have also indirectly produced economic benefits: the increase of gas drainage concentration provides resources for gas utilization and the reduction of the number of power cuts in the working face ensures the coal production. Through the theoretical analysis and numerical simulation of the parameters such as the interval between the drainage holes, the time of the drainage holes and the depth of the drainage holes, this paper provides a scientific and quantitative reference basis for the comprehensive gas drainage in Huangbacci Mine.
【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】：2013
【分類號(hào)】：TD712.6

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 周厚權(quán);;煤層瓦斯含量直接測(cè)定法在寺河礦的應(yīng)用研究[J];礦業(yè)安全與環(huán)保;2009年05期

2 謝雄剛;黃存捍;余照陽(yáng);;我國(guó)煤礦“十一五”期間安全生產(chǎn)狀況及對(duì)策研究[J];礦業(yè)安全與環(huán)保;2012年03期

3 余楚新,鮮學(xué)福,譚學(xué)術(shù);煤層瓦斯流動(dòng)理論及滲流控制方程的研究[J];重慶大學(xué)學(xué)報(bào)(自然科學(xué)版);1989年05期

4 王宏圖,杜云貴,鮮學(xué)福,羅平亞;地電場(chǎng)對(duì)煤中瓦斯?jié)B流特性的影響[J];重慶大學(xué)學(xué)報(bào)(自然科學(xué)版);2000年S1期

5 王宏圖,杜云貴,鮮學(xué)福,羅平亞;受地應(yīng)力、地溫和地電效應(yīng)影響的煤層瓦斯?jié)B流方程[J];重慶大學(xué)學(xué)報(bào)(自然科學(xué)版);2000年S1期

6 蔡厚安;耿妹華;呂秀江;;淺談煤礦安全的法規(guī)和制度問題[J];河北工程大學(xué)學(xué)報(bào)(社會(huì)科學(xué)版);2008年04期

7 薛曉剛;王國(guó)際;黃勵(lì)新;于紅;;平煤十礦測(cè)定己組煤層抽放半徑實(shí)踐[J];能源技術(shù)與管理;2012年02期

8 陳大力,郭凡進(jìn),朱德信;巷道煤壁瓦斯排放帶寬度的測(cè)定[J];煤礦安全;1997年12期

9 梁子明,張斌,吳宏斌;地面鉆孔抽放鄰近層(含采空區(qū))瓦斯的嘗試[J];煤礦安全;1999年11期

10 龔乃勤;采空區(qū)瓦斯抽放方法與展望[J];煤礦安全;2004年11期

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