本文選題：綜放工作面 + 上隅角��； 參考：《安徽理工大學(xué)》2013年碩士論文

【摘要】：綜合機(jī)械化放頂煤采煤方法在我國廣泛應(yīng)用。其開采強(qiáng)度大、采空區(qū)遺煤多、空間大。因此,采空區(qū)瓦斯涌出和采空區(qū)遺煤自燃問題相當(dāng)突出。 本論文是在目前采空區(qū)瓦斯涌出及運(yùn)移規(guī)律、抽采條件下采空區(qū)環(huán)境特征、多孔介質(zhì)理論、滲流控制方程及數(shù)值模擬的基礎(chǔ)上,對綜放工作面抽采條件下采空區(qū)“三帶”分布進(jìn)行系統(tǒng)的研究。分析工作面不同風(fēng)量、抽放口深入采空區(qū)不同深度對“三帶”的影響,并考察其瓦斯治理效果。并通過現(xiàn)場實(shí)測,驗(yàn)證模擬的可行性。通過對正行煤業(yè)1502工作面的研究表明： (1)工作面風(fēng)量的增加采空區(qū)氧化帶寬度也增加。且當(dāng)1502工作面風(fēng)量達(dá)到2000m3/min時(shí),上隅角瓦斯還是較高。因此,僅僅靠通過提高工作面風(fēng)量對來解決采空區(qū)不可行的,應(yīng)該采取其他抽采措施相結(jié)合； (2)上隅角埋管深入采空區(qū)深度增加,采空區(qū)氧化帶寬度增加。與采取抽放措施之前相比,抽放在一定程度上擴(kuò)大了氧化帶寬度。抽放口深入采空區(qū)15m時(shí)效果最好； (3)通過數(shù)值模擬研究與實(shí)測驗(yàn)證,1502工作面在風(fēng)量1500m3/min及上隅角插管深入采空區(qū)15m時(shí),不但消除上隅角瓦斯超限并將采空區(qū)氧化帶寬度控制在一定范圍。 綜放工作面采空區(qū)的瓦斯抽采對采空區(qū)“三帶”分布有重大影響。既要慮采空區(qū)“三帶”分布、又要考慮抽采效果。論文對綜放工作面埋管抽采對采空區(qū)“三帶”的影響研究有很好的指導(dǎo)意義。
[Abstract]:Comprehensive mechanized top coal caving method is widely used in our country. Its mining intensity is large, the goaf remains more coal, the space is large. Therefore, gas emission in goaf and spontaneous combustion of coal in goaf are quite prominent. This paper is based on the current law of gas emission and migration in goaf, the environmental characteristics of goaf under extraction conditions, the theory of porous media, the governing equation of seepage flow and numerical simulation. The distribution of "three zones" of goaf in fully mechanized caving face is studied systematically. This paper analyzes the influence of different air volume and different depth of drainage hole in goaf on "three zones", and investigates the effect of gas treatment. The feasibility of the simulation is verified by field measurement. Through the research on the No. 1502 working face of the positive coal industry, it is shown that: 1) the width of oxidation zone in goaf is also increased with the increase of air volume in working face. And when the air volume of 1502 face reaches 2000m3/min, the upper corner gas is still high. Therefore, it is not feasible to solve the goaf only by increasing the air volume of the working face, and other measures should be taken to combine the measures. 2) the depth of deep goaf increases and the width of oxidation zone increases. Compared with the former, the width of the oxidation zone was enlarged to a certain extent. The best effect is when the pumping opening is 15 m deep in the goaf. The numerical simulation study and the actual measurement verify that when the air volume 1500m3/min and the upper corner intubation go deep into the goaf for 15m, not only the gas in the upper corner is eliminated but also the width of the oxidation zone of the goaf is controlled in a certain range. Gas extraction in goaf of fully mechanized caving face has great influence on the distribution of three zones in goaf. We should not only consider the distribution of three zones in goaf, but also consider the effect of extraction. The paper has a good guiding significance for the study of the influence of buried pipe extraction on the goaf "three zones" in fully mechanized caving face.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TD712.623

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