本文選題：鉆孔抽采 + 啟動壓力�。� 參考：《中國安全生產(chǎn)科學(xué)技術(shù)》2017年05期

【摘要】：煤層瓦斯流動存在啟動壓力,在預(yù)抽鉆孔抽采瓦斯的后期瓦斯?jié)B流出現(xiàn)非Darcy滲流的現(xiàn)象,同時煤層瓦斯壓力、吸附膨脹應(yīng)力、有效應(yīng)力等物性參數(shù)亦發(fā)生改變。為得到為得到啟動壓力對抽采的影響作用,基于煤巖彈性理論和瓦斯?jié)B流理論,研究了在啟動壓力作用下非Darcy滲流現(xiàn)象,得到了考慮啟動壓力的達(dá)西定律,建立了考慮啟動壓力、地應(yīng)力、吸附膨脹應(yīng)力、孔隙壓力共同作用的煤巖瓦斯流固耦合數(shù)學(xué)模型。采用建立的模型對漳村煤礦2601工作面瓦斯抽采鉆孔間距進(jìn)行數(shù)值模擬研究,研究結(jié)果表明:建立的考慮啟動壓力的煤巖瓦斯流固耦合數(shù)學(xué)模型具有一定的可靠性,一定負(fù)壓下啟動壓力影響鉆孔抽采范圍。最終給出了漳村煤礦2601工作面預(yù)抽鉆孔抽采設(shè)計參數(shù)。
[Abstract]:There is start-up pressure in the gas flow in coal seam, the phenomenon of non- seepage appears in the gas seepage in the later stage of gas extraction by pre-drainage borehole, and the physical parameters such as gas pressure, adsorption expansion stress and effective stress in coal seam are also changed. In order to obtain the effect of start-up pressure on extraction, based on the elastic theory of coal and rock and gas seepage theory, the phenomenon of non- seepage under start-up pressure is studied, and Darcy's law considering starting pressure is obtained. A mathematical model of coal-rock gas fluid-solid coupling considering the interaction of start-up pressure, in-situ stress, adsorption expansion stress and pore pressure is established. The established model is used to simulate the interval between gas drainage holes in 2601 face of Zhangcun Coal Mine. The results show that the established mathematical model of coal rock gas fluid-solid coupling considering starting pressure has certain reliability. Starting pressure under certain negative pressure affects the range of borehole extraction. Finally, the design parameters of pre-pumping borehole extraction in 2601 face of Zhangcun Coal Mine are given.
【作者單位】： 遼寧工程技術(shù)大學(xué)礦業(yè)學(xué)院;遼寧省阜新市國土資源局;遼寧工程技術(shù)大學(xué)力學(xué)與工程學(xué)院;東北煤田地質(zhì)局油氣開發(fā)研究院;
【基金】：國家重點(diǎn)研發(fā)計劃項目(2016YFC0600704,2016YFC0801404) 國家自然科學(xué)基金青年科學(xué)基金項目(51304111)
【分類號】：TD712.6

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