本文選題：瓦斯抽采 + 高位鉆孔��； 參考：《采礦與安全工程學(xué)報(bào)》2017年02期

【摘要】：采場(chǎng)頂板來(lái)壓極易將采空區(qū)內(nèi)瓦斯壓出引發(fā)上隅角瓦斯超限甚至瓦斯爆炸�；趲r體的尺寸及時(shí)間效應(yīng)分析了采空區(qū)瓦斯宏觀流動(dòng)通道的演化發(fā)育規(guī)律,應(yīng)用離散元數(shù)值軟件計(jì)算了頂板來(lái)壓前后瓦斯宏觀流動(dòng)通道的變化,結(jié)合關(guān)鍵層理論研究了基于頂板來(lái)壓影響及瓦斯宏觀流動(dòng)通道變化的高位抽采鉆孔終孔位置、鉆場(chǎng)間距及鉆孔接續(xù)的確定方法及設(shè)計(jì)技術(shù)。結(jié)果表明:采空區(qū)基本頂載荷作用時(shí)間越長(zhǎng),垮斷距越大,巖層裂隙越發(fā)育;頂板來(lái)壓及接近來(lái)壓時(shí)瓦斯宏觀流動(dòng)通道最為發(fā)育,貫通性最好,其水平裂隙寬度是來(lái)壓前的3倍,最利于瓦斯抽采�，F(xiàn)場(chǎng)應(yīng)用來(lái)壓時(shí)抽采效率提高約55%,避免了瓦斯超限。
[Abstract]:It is easy to press gas out of goaf by roof pressure in stope and cause gas overrun or even gas explosion in upper corner. Based on the size and time effect of rock mass, the evolution and development rule of gas macroscopic flow channel in goaf is analyzed, and the change of gas macroscopic flow channel before and after roof pressure is calculated by using discrete element numerical software. Based on the theory of key layer, the determination method and design technology of the final hole position, the spacing of drilling field and the continuity of boreholes in high mining based on the influence of roof pressure and the change of gas macroscopic flow channel are studied. The results show that the longer the action time of the basic top load in the goaf, the larger the fault gap, the more developed the rock fissure, and the more developed the gas macroscopic flow channel is when the roof pressure is coming and approaching the pressure, and the transfixibility is the best. The width of horizontal fissure is 3 times of that before pressure, which is most favorable for gas drainage. The site should be used to pressure drainage efficiency about 55 measures to avoid gas overrun.
【作者單位】： 中國(guó)礦業(yè)大學(xué)(北京)資源與安全工程學(xué)院;
【基金】：國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2016YFC0600708) 國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973)項(xiàng)目(2011CB201204) 中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金項(xiàng)目(2011YZ05)
【分類號(hào)】：TD712.6

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