img

QQ群聊

img

官方微信

高级检索

黄金科学技术 ›› 2019, Vol. 27 ›› Issue (6): 888-895.doi: 10.11872/j.issn.1005-2518.2019.06.888

• 采选技术与矿山管理 • 上一篇    下一篇

高温深井通风降温技术的适用条件研究

张睿冲1,2(),谢承煜3,周科平1   

  1. 1. 中南大学资源与安全工程学院,湖南 长沙 410083
    2. 广西大学资源环境与材料学院,广西 南宁 530004
    3. 湘潭大学环境与资源学院,湖南 湘潭 411105
  • 收稿日期:2019-03-06 修回日期:2019-05-17 出版日期:2019-12-31 发布日期:2019-12-24
  • 作者简介:张睿冲(1972-),男,广西合浦人,讲师,从事矿山安全方面的教学和研究工作。394079775@qq.com
  • 基金资助:
    广西科学研究与技术开发计划项目 “建筑物群下多层缓倾斜薄矿体上行式开采安全控制技术研究”(编号:桂科攻1598015-5)和广西安全生产科技项目“金属矿床深部开采风温预测及热害控制模式研究”(gxaj201506)

Study on Applicable Conditions of High Temperature Deep Well Ventilation Cooling Technology

Ruichong ZHANG1,2(),Chengyu XIE3,Keping ZHOU1   

  1. 1. School of Resources and Safety Engineering,Central South University,Changsha 410083,Hunan,China
    2. School of Resources,Environment and Materials,Guangxi University,Nanning 530004,Guangxi,China
    3. College of Resources and Environment,Xiangtan University,Xiangtan 411105,Hunan,China
  • Received:2019-03-06 Revised:2019-05-17 Online:2019-12-31 Published:2019-12-24

摘要:

随着矿山开采深度的不断增加,“三高一扰动”恶劣开采环境问题日益突出,给矿井通风降温工作带来极大困难。对于深井矿山,仅采用通风降温难以满足深部开采的需要,系统研究高温深井矿山通风降温技术的适用性问题,对矿山深部开采具有重要的理论意义和工程适用价值。首先从热力学角度,揭示风流在通风线路中的热交换规律;其次利用差分法原理计算深井筒风流温度,并依此推导出巷道和回采工作面风流温度变化趋势;然后结合采场安全生产允许温度进行反推,最终获取通风降温条件下的可采极限深度计算公式,并选取广西铜坑矿锌多金属矿体作为工程应用试验区进行论证分析。结果表明:基于风流的热交换模型可以推导出风流在井筒、巷道及工作面的温度计算公式,该公式与低温梯度、风流流经路径长度有关;假定工作面温度达到安全开采允许最高温度,可反推出该条件下矿山可采极限深度和巷道通风极限长度(仅采用通风降温措施时);基于铜坑矿区锌多金属矿的实际条件,代入相关数据,验证计算所得极限开采深度符合实际,即所推导公式是可行的。

关键词: 高温深井, 高温热害, 通风降温, 差分法原理, 风温预测, 可采极限深度

Abstract:

With the extension of mining to the deep,the harsh mining environment of “three high and one flexible” is becoming increasingly prominent,among which the high temperature thermal hazard is a complex problem.In the process of mine production,under the influence of high temperature and heat environment,the air flow in mine roadway exchanges moisture and heat in high temperature and heat environment,which makes the air flow temperature rise,and then induces a series of problems,which eventually lead to a series of problems,such as difficulty in ventilation management,decline of production capacity,deterioration of working environment and so on.Because of the large depth of the mine,it is more difficult to ventilate and cool down the mine.During the period of mine ventilation,air flow is discharged from the surface along the shaft,roadway to the working face and through the return air shaft.During the above process,the air flow exchanges greatly with the mine environment in the shaft,roadway and working face,and the nature of air flow changes accordingly. Exploring the temperature variation characteristics of air flow in three stages of shaft,roadway and working face is helpful to determine the appropriate mining depth and choose the appropriate cooling mode. For deep mines,it is difficult to meet the need of deep mining only by using ventilation cooling technology.Reveal romantic from the perspective of thermodynamics in the heat exchange law ventilation circuit principle of finite difference method was used to calculate deep wellbore temperature,and in this roadway and the working temperature change trend was deduced,combined with the mine safety production permit back-stepping,temperature eventually acquire ventilation cooling recoverable under the condition of the limit depth formula.Guangxi copper mine zinc polymetallic ore body was sellected as engineering application test area,to analyzed the formula.The results show that the heat exchange model based on airflow can deduce the calculation formula of airflow temperature in wellbore,roadway and working face.Assuming that the working face temperature reaches the maximum allowable temperature for safe mining,the mining limit depth and the ventilation limit length of the roadway under this condition can be deduced reversely (when ventilation and cooling measures are adopted only).Based on the actual conditions of the zinc polymetallic ore in the Tong-keng mining area,relevant data are brought in to verify that the calculated limit mining depth is in line with the reality,that is,the derived formula is feasible.

Key words: high temperature deep well, high temperature heat damage, ventilation and cooling, principle of difference method, wind temperature prediction, limit depth of mining

中图分类号: 

  • TD757

图1

矿井通风热交换简图"

图2

竖直方向井段划分示意图"

表1

各中段原岩温度预测"

中段/m深度/m预测温度/℃
+25556135.00
+20562136.75
+15566138.50
+10571140.25
+5576142.00
+581143.75

表2

工程环境参数"

参数数值参数数值
地温梯度/(℃·10-2·m-1)3.5不稳定换热系数0.14
恒温带温度/℃17.2风路服务年限/a3
恒温带深度/m28.6空气密度/(kg·m-3)1.1

表3

工程设计参数"

参数数值参数数值
入风井直径/m6.5巷道长度/m1 352
巷道断面积/m27.3回采工作面长度/m50
巷道周长/m10.4矿井总入风量/(m3·s-1)209
回采工作面周长/m10.7回采工作面水平夹角/(°)30

表4

矿区各月份t0取值"

月份平均风温/℃月份平均风温/℃
18.22725.57
210.16825.41
313.96923.12
418.661019.21
522.101114.58
624.36

图3

矿区各月可采极限深度"

1 魏亚兴.矿井通风井巷热交换规律数值试验研究[D].长沙:中南大学,2012.
Wei Yaxing.Numerical Experimental Study on Heat Exchange Law of Mine Ventilation Tunnel[D].Changsha:Central South University,2012.
2 平松良雄.通风学[M].北京:冶金工业出版社,1981.
Hiratsu Liangxiong.Ventilation Science[M].Beijing:Metallurgical Industry Press,1981.
3 舍尔巴尼A H,克列姆涅夫 O A.矿井降温指南[M]. 黄翰文译.北京:煤炭工业出版社,1982.
Шербань A H,кpeМНЕВ O A.Mine Cooling Guidelines[M].Huang Hanwen,Trans.Beijing:Coal Industry Press,1982.
4 罗威.姚家山矿千米深井热害防治技术研究[D].太原:太原理工大学,2014.
Luo Wei.Study on Heat Damage of 1000 m Deep Mine and Its Prevention Technology in Yaojiashan[D].Taiyuan:Taiyuan University of Technology,2014.
5 Yoshida H.History of technical improvement and underground conditions at deep mining [J].Journal of the Mining and Material Processing Institute of Japan,1989,105(9):656-660.
6 Howard L H,Mutmansky J M,Ramani R V,et al.Mine Ventilation and Air Conditioning [M].New York:Wiley Interscience,1997.
7 van Antwerpen H J,Greyvenstein G P.Use of turbines for simultaneous pressure regulation and recovery in secondary cooling water systems in deep mines[J].Energy Conversion and Management,2005,46(4):563-575.
8 Burton R C,Plenderleith W,Stewart J M,et al.Recirculation of air in the ventilation and cooling of deep gold mines[J].Institute of Mining and Metallurgy,2007,223(5):291-299.
9 Steer J,Burton R,Bluhm S.Recent developments in the cooling of deep mines[J].South African Mechanical Engineer,1984,134(1):12-18.
10 胡汉华.金属矿山矿井热害控制技术研究[D].长沙:中南大学,2008.
Hu Hanhua.Research on Techonologies of Heat Control for Metal Mines[D].Changsha:Central South University,2008.
11 黄翰文.矿井风温预测的统计研究[J].煤炭学报,1981(3):51-58.
Huang Hanwen.Statistical study on prognostication of mine air temperature[J].Journal of China Coal Society,1981(3):51-58.
12 岑衍强,侯棋棕.矿内热环境工程[M].武汉:武汉工业大学出版社,1989.
Cen Yanqiang,Hou Qizong.Mine Thermal Environment Engineering[M].Wuhan:Wuhan Industrial University Press,1989.
13 赵以蕙.矿井通风与空气调节[M].徐州:中国矿业大学出版社,1990.
Zhao Yihui.Mine Ventilation and Air Conditioning[M].Xuzhou:China University of Mining and Technology Press,1990.
14 余恒昌.矿山地热与热害治理[M].北京:煤炭工业出版社,1991.
Yu Hengchang.Mine Geothermal and Heat Treatment[M].Beijing:China Coal Industry Publishing House,1991.
15 严荣林,侯贤文.矿井空调技术[M].北京:煤炭工业出版社,1994.
Yan Ronglin,Hou Xianwen.Mine Air Conditioning Technology[M].Beijing:China Coal Industry Publishing House,1994.
16 赵春杰.矿井风流热力过程及通风降温模拟研究[D].济南:山东科技大学,2009.
Zhao Chunjie.Study on the Thermal Process of Mine Airflow and the Simulation of Ventilation and Cooling[D].Jinan:Shandong University of Science and Technology,2009.
17 罗海珠.矿井通风降温理论与实践[M].沈阳:辽宁科学技术出版社,2013.
Luo Haizhu.Theory and Practice of Mine Ventilation[M].Shenyang:Liaoning Science and Technology Publishing House,2013.
18 菅从光.矿井深部开采地热预测与降温技术研究[M].徐州:中国矿业大学出版社,2013.
Jian Congguang.Study on Geothermal Prediction and Cooling Technology in Deep Mining of Mine[M].Xuzhou:China University of Mining and Technology Press,2013.
19 谢和平,周宏伟,薛东杰,等.煤炭深部开采与极限开采深度的研究与思考[J].煤炭学报,2012,37(4):535-542.
Xie Heping,Zhou Hongwei,Xue Dongjie,et al.Research and consideration on deep coal mining and critical mining depth[J].Journal of China Coal Society,2013,37(4):535-542.
20 龚东山.几类常差分方程精确解的研究[D].兰州:兰州大学,2009.
Gong Dongshan.Studies of Exact Solutions to Several Kinds of the Ordinary Difference Equations[D].Lanzhou:Lanzhou University,2009.
21 高建良,张学博.潮湿巷道风流温度与湿度变化规律分析[J].中国安全科学学报,2007,17(4):136-139.
Gao Jianliang,Zhang Xuebo.Analysis on the changing rule of airflow’s temperature and humidity in wet airway[J].China Safety Science Journal,2007,17(4):136-139.
22 中华人民共和国矿山安全法实施条例[EB/OL]. .
Regulations for the implementation of the mine safety law of the People’s Republic of China[EB/OL]..
No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!