高温金属矿井巷道掘进中组合压冷风筒布位对降温效果的影响

doi:10.11872/j.issn.1005-2518.2022.01.100

摘要/Abstract

摘要：

为量化研究高温掘进巷道在双压入抽压混合通风中设备布置对降温效果的影响规律，利用Fluent计算流体力学（CFD）软件对掘进巷道通风降温进行数值模拟。首先，建立双压入混合通风三维模型，利用Fluent软件对模型进行边界条件及求解器参数设置；其次，设置3组压入风筒2不同布置位置的对比试验进行数值模拟；最后，分析双压入抽压混合通风降温作用下的掘进巷道温度场分布，量化压入风筒2不同布置位置时巷道内温度分布规律。研究结果表明：双压入混合通风中压入风筒2的布置位置对巷道内的温度分布影响明显，当压入风筒2布置于距掘进面30 m处时，掘进巷道30 m范围内温度稳定在26 ℃左右；当压入风筒2布置于距掘进面50 m处时，掘进巷道50 m范围内温度虽有约1 ℃的波动但整体数值保持在28 ℃以下；当压入风筒2布置于距掘进面70 m处时，掘进巷道内温度波动幅度较大且出现大范围温度超出限值情况，此时双压入混合通风降温作用基本失效。

关键词: 双压入混合通风, 掘进巷道, 热害, 计算流体力学（CFD）, 温度场, 风筒布置位置

Abstract:

In order to quantitatively study the influence of the equipment layout on the cooling effect of the high-temperature driving roadway in the dual-pressure pumping mixed ventilation，the Fluent computational fluid dynamic（CFD）software was used to carry out a numerical simulation study on the ventilation cooling of the driving roadway.Firstly，the three-dimensional model of dual press-in mixed ventilation was established，and the boundary conditions and solver parameters of the model were set by Fluent software.Then，three groups of press-in air ducts 2 were set to conduct comparison experiments at different layout positions for numerical simulation.Finally，the temperature field distribution of the driving roadway under the action of dual-injection pumping and mixed ventilation and cooling was analyzed，and the temperature distribution law in the roadway was quantified when the pressure-in air duct 2 is arranged in different positions.The research results show that the dual-injection mixed ventilation can effectively treat the key treatment areas with the most active heat exchange within 50 m of the excavation roadway.The temperature field in the horizontal direction shows that the temperature on the pressure side of the tunnel from the outlet of the compressed air duct 2 is lower than that on the suction side，and the temperature on the suction side of the roadway is gradually lower after the air duct 1 is compressed. The temperature field of the roadway section shows that the temperature distribution at different heights of the roadway at different sections is different，and the temperature difference at different heights of the roadway is larger when it is close to the section of the forced air duct 2，the temperature in the upper and lower positions of the tunnel is lower and the temperature in the middle position is higher.The arrangement position of the press-in air duct 2 in the dual press-in mixed ventilation directly determines the temperature distribution in the roadway.When the press-in air duct 2 is arranged at 30 m from the driving surface，the temperature within 30 m of the driving roadway is stable at about 26 ℃.When the air inlet duct 2 is arranged at a distance of 50 m，although the temperature within 50 m of the driving roadway fluctuates by about 1 ℃，the overall value remains below 28 ℃ to meet the operation requirements.When the air duct 2 is arranged at 70 m away from the driving surface，the temperature fluctuation range in the driving roadway is relatively large and the temperature exceeds the limit in a wide range.At this time， the cooling effect of dual press-in mixed ventilation basically fails.The position of the press-in air duct 2 can be flexibly arranged under the appropriate conditions of the cooling and air supply parameters to meet the cooling requirements of long-distance roadways.The air temperature change law of the driving roadway obtained in the experiment in this paper can provide reference for the research of other ventilation cooling systems under similar conditions.

Key words: double press-in mixed ventilation, driving roadway, heat damage, computational fluid dynamic （CFD）, temperature field, air duct layout position

中图分类号:

TD727

聂兴信,刘哲伟,高赵祥,程平. 高温金属矿井巷道掘进中组合压冷风筒布位对降温效果的影响[J]. 黄金科学技术, 2022, 30(1): 85-92.

Xingxin NIE,Zhewei LIU,Zhaoxiang GAO,Ping CHENG. Influence of Combined Compression Cooling Air Duct Arrangement on the Cooling Effect in High-Temperature Metal Mine Roadway Excavation[J]. Gold Science and Technology, 2022, 30(1): 85-92.

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边界条件	设置类型
压入风筒	VELOCITY-INLET
抽出风筒	VELOCITY-INLET
巷道入口	PRESSURE-OUT
送风温度/K	295.15（22 ℃）
巷道环境初始温度/K	307.15（34 ℃）
围岩壁面温度/K	311.15（38 ℃）
围岩厚度/m	1.5

参数名称	设置类型
求解器	非稳态求解器
时间	20 min
湍流模式	k-ε模型
能量方程	开
压力速度耦合方式	SIMPLEC
收敛标准	0.001

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