本文選題：陷落柱　切入點(diǎn)：滲流速度　出處：《煤礦安全》2017年03期

【摘要】：為了揭示滲流作用下煤礦陷落柱內(nèi)部溫度場的分布特征,基于多孔介質(zhì)巖體滲流與傳熱學(xué)等理論,建立了陷落柱滲流-溫度場耦合數(shù)學(xué)模型。以某煤礦II51陷落柱作為數(shù)值模擬原型,深部奧灰水為高溫?zé)嵩?得到了不同滲透率條件下,滲流速度與溫度場在陷落柱內(nèi)部空間分布特征。結(jié)果表明:隨著滲透率增加,陷落柱內(nèi)部滲流速度變大,使得高溫異常區(qū)擴(kuò)散范圍也隨之變大;滲流作用對(duì)陷落柱垂向上的溫度場影響要強(qiáng)于水平方向上,同時(shí)陷落柱內(nèi)部溫度梯度值低于正常圍巖區(qū)地溫梯度值;在水平方向上距離陷落柱邊界越近,溫度遞增現(xiàn)象越明顯。在距陷落柱50 m范圍內(nèi),溫度差值可達(dá)2~8℃,由此認(rèn)為通過溫度來進(jìn)行陷落柱的預(yù)測(cè)預(yù)報(bào)具有可行性。
[Abstract]:In order to reveal the distribution characteristics of temperature field in coal mine collapse column under seepage flow, the coupled mathematical model of seepage and temperature field of collapse column is established based on the theory of seepage and heat transfer in porous media.Taking the II51 collapse column of a coal mine as the numerical simulation prototype and the deep Ordovician water as the high temperature heat source, the spatial distribution characteristics of seepage velocity and temperature field in the collapse column are obtained under different permeability conditions.The results show that with the increase of permeability, the velocity of seepage inside the collapse column becomes larger, and the diffusion range of the anomalous zone at high temperature becomes larger, and the effect of seepage on the vertical temperature field of the collapse column is stronger than that in the horizontal direction.At the same time, the internal temperature gradient of the collapse column is lower than that of the normal surrounding rock area, and the closer the horizontal direction is to the boundary of the subsided column, the more obvious the temperature increasing phenomenon is.In the range of 50 m from the collapse column, the temperature difference can reach 2 ~ 8 鈩，

本文編號(hào)：1701849