司馬煤礦薄基巖區(qū)導(dǎo)水裂隙帶發(fā)育規(guī)律
發(fā)布時間:2018-04-27 15:00
本文選題:薄基巖 + 導(dǎo)水裂隙帶��; 參考:《煤礦安全》2015年03期
【摘要】:為了得出司馬煤礦薄基巖區(qū)導(dǎo)水裂隙帶的發(fā)育規(guī)律,首先對薄基巖分布特征及巖層力學(xué)特性進(jìn)行了分析,進(jìn)而利用經(jīng)驗公式計算出了導(dǎo)水裂隙帶發(fā)育高度,同時運用數(shù)值計算軟件RFPA2D對煤層開采進(jìn)行了模擬。結(jié)果表明:司馬煤礦3#煤層薄基巖總體趨勢為一向斜,局部有小的隆起和凹陷,薄基巖厚度變化范圍在30~80 m;3#煤層上覆的整個基巖柱的強度大于40 MPa,屬于堅硬型;經(jīng)驗公式計算得到司馬礦3#煤層薄基巖導(dǎo)水裂隙帶發(fā)育高度在47.3~83.5 m之間,與數(shù)值模擬得到的最大發(fā)育高度85 m基本相符。
[Abstract]:In order to obtain the development rule of the water-conducting fissure zone in Sima coal mine, the distribution characteristics of thin bedrock and the mechanical characteristics of rock layer are analyzed, and the height of the water-conducting fissure zone is calculated by using empirical formula. At the same time, the numerical calculation software RFPA2D is used to simulate the coal seam mining. The results show that the general trend of thin bedrock in the seam of Sima coal mine is always inclined, with small uplift and depression, and the thickness of thin bedrock varies in the coal seam of 300.80mHM, the strength of the whole bedrock column is more than 40MPa, which belongs to the hard type. The developed height of water-conducting fissure zone of coal seam in the seam of Sima Mine is 47.3 ~ 83.5 m, which is basically consistent with the maximum height of 85 m obtained by numerical simulation.
【作者單位】: 中國礦業(yè)大學(xué)深部巖土力學(xué)與地下工程國家重點實驗室;中國礦業(yè)大學(xué)力學(xué)與建筑工程學(xué)院;
【基金】:國家自然科學(xué)基金資助項目(50974115) 國家重點基礎(chǔ)研究發(fā)展計劃(973計劃)資助項目(2013CB227900)
【分類號】:TD745
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