深井高温热害是深部煤炭资源开采过程中的严重灾害,高温不仅影响了围岩的力学性质,而且严重影响矿井生产安全。本研究针对国内外矿井降温技术存在的问题,提出了以矿井涌水作为冷源的深井开采高温热害控制HEMS(High Temperature Exchange...深井高温热害是深部煤炭资源开采过程中的严重灾害,高温不仅影响了围岩的力学性质,而且严重影响矿井生产安全。本研究针对国内外矿井降温技术存在的问题,提出了以矿井涌水作为冷源的深井开采高温热害控制HEMS(High Temperature Exchange Machinery System)技术,利用提取出的冷量与工作面高温空气进行换热作用,降低工作面的环境温度及湿度。该技术结合夹河矿深井降温工程,建成了国内第一个控制深井热害的深部科学与工程实验室(DUSEL)。系统运行结果表明,工作面温度降低4—6℃,最高温度控制在28—29℃以内,相对湿度降低5%—10%,极大改善了井下工作环境,热害控制效果显著,具有广阔的推广应用前景。展开更多
数值模拟法是地下水水量和水质评价的主要技术方法,通过简述地下水数值模拟的发展历程、FEFLOW软件的输入特点和功能,并结合FEFLOW在地下水模拟方面的应用现状,论述了对河流和断层处理的方法,最后提出了FEFLOW软件存在的问题及应用前景...数值模拟法是地下水水量和水质评价的主要技术方法,通过简述地下水数值模拟的发展历程、FEFLOW软件的输入特点和功能,并结合FEFLOW在地下水模拟方面的应用现状,论述了对河流和断层处理的方法,最后提出了FEFLOW软件存在的问题及应用前景。研究结果可知:(1) FEFLOW是迄今为止功能最为齐全的地下水数值模拟软件,适用于各种尺度的地下水、多孔介质和热能传输项目,但这些领域基本都是水流和溶质运移耦合、水流和热量运移耦合等两场进行耦合,少见三场耦合研究实例;(2)存在无法实现源汇项单独处理等缺陷,仅能实现in/outflow on top/bottom菜单功能,降雨入渗和蒸发同时作用必须用净补给量来表达,增加了前处理的困难,在应用模型模拟时,由于FEFLOW网格划分时的数量受到限制,超大区域建模也容易出现不精确问题;(3)在对地下水污染物运移模型模拟时,通常考虑的是对流、弥散、吸附作用,而未有一阶化学非平衡反应,随着人类对地下水环境和质量的高度重视,对于两相有机和无机污染物迁移耦合研究将会是未来的研究重点。展开更多
With the increasing exploitation scope and intensity,the shallow resources would be exhausted in the future;and the deep mining will become an essential choice.In deep tunnel engineering,the heat-harm becomes one of t...With the increasing exploitation scope and intensity,the shallow resources would be exhausted in the future;and the deep mining will become an essential choice.In deep tunnel engineering,the heat-harm becomes one of the mainbariers.Investigations on high temperature coal mine have been done in Nothem China,with the construting of threemodels of high temperature mines suffering heat-harm,at the Jiahe mine,Sanhejian mine and Zhangshuanglou mine.Thedomestic and abroad cooling technologies of the mine respectively are also summarized after comparatively analyzing theadvantages and disadvantages of each technology.Finally,we find that the high temperature exchange machinery system(HEMS)technology that use mine discharge as the cold source,is excellent to heat-ham control in deep mines.Taking theJiahe coal mine as an example,we systematically introduce this teclnology by disposing three main workstations.HEMStechnology with its operations and functions in different exploitation levels are accomplished,including the extraction ofrefrigerating output,the transportation of chilled water by closed circulation line,the decompression of circulation linesand equipment by pressure transformation machine,and the heat exchange and cooling of workplace by heat exchangebetween wind stream and the chilled water.The exchanged heat source from the workplace is taken to ground heating bythe circulating water which acts as a carrier.It shows that the HEMS-technology benefit in environment protection andemission reduction.Results of this project illustrate that it is efficient in heat-ham control with the temperature decrease ofthe workplace down to 26-29℃,and being 4-6℃ lower than the original,and the relative humidity 5%-15%lowerthan before.It greatly improves the working environment of underground workplace suffering heat-ham of high tem-perature and high humidity.In addition,by the extracting of deep geothermal enery,ground fired boiler for heating hasbeen replaced,reducing environmental pollution.This technology is worth genera展开更多
文摘深井高温热害是深部煤炭资源开采过程中的严重灾害,高温不仅影响了围岩的力学性质,而且严重影响矿井生产安全。本研究针对国内外矿井降温技术存在的问题,提出了以矿井涌水作为冷源的深井开采高温热害控制HEMS(High Temperature Exchange Machinery System)技术,利用提取出的冷量与工作面高温空气进行换热作用,降低工作面的环境温度及湿度。该技术结合夹河矿深井降温工程,建成了国内第一个控制深井热害的深部科学与工程实验室(DUSEL)。系统运行结果表明,工作面温度降低4—6℃,最高温度控制在28—29℃以内,相对湿度降低5%—10%,极大改善了井下工作环境,热害控制效果显著,具有广阔的推广应用前景。
文摘数值模拟法是地下水水量和水质评价的主要技术方法,通过简述地下水数值模拟的发展历程、FEFLOW软件的输入特点和功能,并结合FEFLOW在地下水模拟方面的应用现状,论述了对河流和断层处理的方法,最后提出了FEFLOW软件存在的问题及应用前景。研究结果可知:(1) FEFLOW是迄今为止功能最为齐全的地下水数值模拟软件,适用于各种尺度的地下水、多孔介质和热能传输项目,但这些领域基本都是水流和溶质运移耦合、水流和热量运移耦合等两场进行耦合,少见三场耦合研究实例;(2)存在无法实现源汇项单独处理等缺陷,仅能实现in/outflow on top/bottom菜单功能,降雨入渗和蒸发同时作用必须用净补给量来表达,增加了前处理的困难,在应用模型模拟时,由于FEFLOW网格划分时的数量受到限制,超大区域建模也容易出现不精确问题;(3)在对地下水污染物运移模型模拟时,通常考虑的是对流、弥散、吸附作用,而未有一阶化学非平衡反应,随着人类对地下水环境和质量的高度重视,对于两相有机和无机污染物迁移耦合研究将会是未来的研究重点。
基金support by the Key Program of National Natural Science Foundation of China(51134005)Doctoral Scientific Fund Project of the Ministry of Education of China(20120023120004)is gratefully acknowledged.
文摘With the increasing exploitation scope and intensity,the shallow resources would be exhausted in the future;and the deep mining will become an essential choice.In deep tunnel engineering,the heat-harm becomes one of the mainbariers.Investigations on high temperature coal mine have been done in Nothem China,with the construting of threemodels of high temperature mines suffering heat-harm,at the Jiahe mine,Sanhejian mine and Zhangshuanglou mine.Thedomestic and abroad cooling technologies of the mine respectively are also summarized after comparatively analyzing theadvantages and disadvantages of each technology.Finally,we find that the high temperature exchange machinery system(HEMS)technology that use mine discharge as the cold source,is excellent to heat-ham control in deep mines.Taking theJiahe coal mine as an example,we systematically introduce this teclnology by disposing three main workstations.HEMStechnology with its operations and functions in different exploitation levels are accomplished,including the extraction ofrefrigerating output,the transportation of chilled water by closed circulation line,the decompression of circulation linesand equipment by pressure transformation machine,and the heat exchange and cooling of workplace by heat exchangebetween wind stream and the chilled water.The exchanged heat source from the workplace is taken to ground heating bythe circulating water which acts as a carrier.It shows that the HEMS-technology benefit in environment protection andemission reduction.Results of this project illustrate that it is efficient in heat-ham control with the temperature decrease ofthe workplace down to 26-29℃,and being 4-6℃ lower than the original,and the relative humidity 5%-15%lowerthan before.It greatly improves the working environment of underground workplace suffering heat-ham of high tem-perature and high humidity.In addition,by the extracting of deep geothermal enery,ground fired boiler for heating hasbeen replaced,reducing environmental pollution.This technology is worth genera
