渗流作用下陷落柱温度场分布特征数值模拟

发布时间：2018-04-02 19:48

  本文选题：陷落柱　切入点：渗流速度　出处：《煤矿安全》2017年03期

【摘要】：为了揭示渗流作用下煤矿陷落柱内部温度场的分布特征,基于多孔介质岩体渗流与传热学等理论,建立了陷落柱渗流-温度场耦合数学模型。以某煤矿II51陷落柱作为数值模拟原型,深部奥灰水为高温热源,得到了不同渗透率条件下,渗流速度与温度场在陷落柱内部空间分布特征。结果表明:随着渗透率增加,陷落柱内部渗流速度变大,使得高温异常区扩散范围也随之变大;渗流作用对陷落柱垂向上的温度场影响要强于水平方向上,同时陷落柱内部温度梯度值低于正常围岩区地温梯度值;在水平方向上距离陷落柱边界越近,温度递增现象越明显。在距陷落柱50 m范围内,温度差值可达2~8℃,由此认为通过温度来进行陷落柱的预测预报具有可行性。
[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，

本文编号：1701849