CN102900452A - Technique for cooling deep mining area by using ground temperature of shallow goaf and waste roadway - Google Patents
Technique for cooling deep mining area by using ground temperature of shallow goaf and waste roadway Download PDFInfo
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Abstract
The invention discloses a technique for cooling a deep mining area by using the ground temperature of a shallow goaf and a waste roadway. An air intake fan station (9) is arranged outside an air intake port of a deep operating middle section (5); a return fan station (10) is arranged outside an air outlet port of the deep operating middle section (5); the air intake fan station (9) is communicated with a deep downcast shaft (4); the return fan station (10)is communicated with an air return shaft (6); pre-cooling fans (3) are arranged at all the exits of the shallow goaf and the waste roadway (2); and an air door (7) is arranged on a natural ventilation air passage (8) shared by the shallow goaf and the waste roadway (2). According to the invention, an air flow circuit and the pre-cooling fans (3) are adopted to adjust the downcast air flow, and through the technique, the high-temperature air flow can be totally or partially pre-cooled in summer so as to reduce the wind enthalpy which enters the deep high-temperature area and to improve the heat extraction and cooling abilities of the system. In winter, the pre-cooling fans are turned off and the heat accumulated in summer is expelled through natural ventilation. Therefore, the technique realizes alternating multiple heat balance and use in winter and summer in a mine.
Description
Technical field
The present invention relates to a kind of underground non-coal solid mine falling temperature technique, be applicable to that superficial part has low temperature goaf and waste and old tunnel and there is the mine ventilation cooling in the non-coal of high warm evil (on-radiation) solid mine in the deep.
Background technology
Approximate alternating temperature circle, constant temperature circle, intensification circle three circles of being divided into of earth rock mass, wherein alternating temperature circle, constant temperature circle thickness generally only have 30～50m thick, press geothermal gradient along with degree of depth deepening rock temperature rises.Mine stays a large amount of goafs and waste and old tunnel in downward recovery process middle and upper part, these goafs and many places, waste and old tunnel link to each other with the earth's surface and consist of the natural ventilation wind path, (top 200～330m) becomes the alternating temperature circle to the near surface rock mass gradually in natural ventilation process for many years, its average rock temperature is near local average temperature of the whole year, and comparing with Deep Mining becomes a low-temperature space.
In the mine ventilation engineering, can utilize the low temperature rock mass and this regional low temperature flowing water, the natural resources such as natural airflow of upper area of the known existence in down-hole.If can sufficiently and reasonably utilize these natural resources to be the mine ventilation service, especially for deep heat evil mine, not only can improve the underground ventilating effect, promote the aeration technology level, and can reduce widely the ventilation energy consumption, be the important content of green mining, energy-saving and emission-reduction.
At present, China has carried out the practice of the aspects such as ground temperature precooling, cold water are recycling, the utilization of mine natural airflow in indivedual mines, produces energy-saving and cost-reducing having great importance for development and the mine of mine ventilation technology.The tentative low temperature ground temperature natural resources that utilized the discarded roadway in down-hole, goaf of mine such as Xiangxi Gold Mine, old shop gold mine, ore deposit, Jin Qing top, but pre-cold blast rate, windage are not regulated.Flowing resistance air quantity large, that pass through in goaf is little, distinguished and admirable little with goaf country rock heat exchange area, so that ground temperature and distinguished and admirable the quantity of heat convection are low, pre-cold blast rate is little, thereby so that it is still higher to enter the wind-warm syndrome in deep, to whole ventilation system cooling-down effect and not obvious, be difficult to reach the purpose of improving operating environment, reducing the ventilation energy consumption, while winter and summer goaf inverted air current, distinguished and admirable adjusting difficulty.
At present, there are following problem in goaf and the low temperature ground temperature utilization of waste and old tunnel:
(1) mine enters distinguished and admirable winter, summer two seasons ventilation route change problem: utilize summer precooling fan to impel the mine intake airflow to utilize low temperature dead zone and waste and old tunnel to reach precooling effect through design; Must consider winter to change its course into distinguished and admirable, impel the low temperature distinguished and admirable minimal path of walking in earth's surface to enter the deep, reduce distinguished and admirable interchange of heat at upper area, prevent from again bringing the heat on top into deep.
(2) thermal balance question of underground ventilating system: enter the distinguished and admirable precooling of well, goaf accumulation of heat, the rising of rock temperature summer, natural airflow heat extraction in winter, goaf heat release, rock temperature descend, and realize the heat balance of down-hole near surface rock mass.
Summary of the invention
Purpose of the present invention is exactly for the above-mentioned problems in the prior art, and provide a kind of superficial part goaf and waste and old tunnel ground temperature of utilizing to the technology of deep mining cooling, this technology by in superposed superficial part goaf and waste and old tunnel set up precooling fan, overcome the flowing resistance in superficial part goaf and waste and old tunnel, when impelling earth's surface high temperature air intake to flow through superficial part goaf and waste and old tunnel, high temperature air carries out sufficient heat convection with the low temperature country rock of larger bare area, thereby realization cools naturally to the mine deep part intake airflow, reaches and improves the deep ventilation effect, energy-saving and cost-reducing purpose.
For realizing above-mentioned purpose of the present invention, the present invention utilizes superficial part goaf and waste and old tunnel ground temperature to the technology of deep mining cooling by the following technical solutions:
The air inlet fan station is set outside the air intake in operation stage casing, deep, the return fan station is set outside the air outlet in operation stage casing, deep; Described air inlet fan station and deep downcast link; Described return fan station and returnairshaft link.Because distinguished and admirable section through superficial part goaf and waste and old tunnel is little, it is distinguished and admirable that to converge shunting place many, and superficial part goaf and waste and old tunnel distribute wide and many, must increase the part flowing resistance, thereby the precooling fan that some must be set is to provide the ventilation negative pressure, increase ventilation power, impel the distinguished and admirable of flow through superficial part goaf and waste and old tunnel to flow to the deep.Described precooling fan is arranged on the exit in superficial part goaf and waste and old tunnel, each exit arranges precooling fan, the quantity of precooling fan, parameter are carried out quantitative calculating according to thermophysical parameter, the thermophysical parameter in operation stage casing, deep, air balance law, the energy balance law in summer earth's surface average temperature of the whole year, superficial part goaf and waste and old tunnel, and the quantity in superficial part goaf and waste and old tunnel is set as n; In the superficial part goaf and the natural ventilation wind path that shares of waste and old tunnel air door is set; Import after the wind path parallel connection in superposed (n-1) individual superficial part goaf and waste and old tunnel and be connected to nethermost superficial part goaf and waste and old tunnel; It is T ℃ that local average temperature of the whole year is set, and the opening ways of the wind path UNICOM mode in superficial part goaf and waste and old tunnel, deep downcast, operation stage casing, deep and precooling fan, air door is:
(1) when earth's surface temperature 〉=(T+4) ℃, nethermost superficial part goaf and waste and old tunnel and deep downcast, operation stage casing, deep order UNICOM close air door, open whole precooling fans;
(2) when (T-4) ℃＜at earth's surface temperature＜(T+4) ℃, nethermost superficial part goaf and waste and old tunnel and deep downcast, operation stage casing, deep order UNICOM, close air door, opening section precooling fan, precooling fan are opened quantity according to thermophysical parameter, the thermophysical parameter in operation stage casing, deep, air balance law, the energy balance law in earth's surface average temperature of the whole year, superficial part goaf and waste and old tunnel carried out quantitative calculating at that time;
(3) when earth's surface temperature≤(T-4) ℃, open air door, stop precooling fan, in such cases, the superficial part downcast directly and the deep downcast link.
Certainly, because north-south climate difference, above-mentioned and earth's surface temperature and local average temperature of the whole year are T ℃ difference, are not limited to 4 ℃, also can be 3 ℃, 5 ℃.
Because superficial part goaf and waste and old tunnel distribute extensively, be present in different stage casings, increased necessary precooling fan in each stage casing.Simultaneously, superficial part goaf and waste and old tunnel may exist that oxygen content is low, the wind speed air quantity is low, especially may there be toxic and harmful, the distinguished and admirable air intake wind regime that is mainly used in high temperature exploiting field, deep of precooling, therefore, wind speed, air quantity, wind-warm syndrome and wind regime wind matter are related to the deep and reach safely aeration-cooling effect with wind.Therefore whole ventilation system also is equipped with ventilation system Long-distance Control and online monitoring system, can realize the Real-Time Monitoring of the long-range start-stop of precooling fan, air inlet fan station blower fan, return fan station blower fan and wind speed air quantity, toxic and harmful, guarantee air intake wind regime wind matter, improve safety, the stability of precooling cooling system.
The ventilation system Long-distance Control and the on-line monitoring system that adopt are not only kept and are consolidated the cooling precooling effect, and have promoted the ventilating management level, the ventilation system management mode that optimization and upgrading is traditional.
The present invention forces into the distinguished and admirable process of well near surface dead zone owing to having set up precooling fan in the exit in superficial part goaf and waste and old tunnel, regulates air quantity and windage through superficial part goaf and waste and old tunnel, so that distinguished and admirable descending after the precooling.Summer, the earth's surface air intake can be some or all of through superficial part goaf and waste and old tunnel, high temperature air and the heat exchange of low temperature rock mass and distinguished and admirable enthalpy reduce, temperature reduces, for the superficial part goaf that has simultaneously many stage casings and waste and old tunnel, total pre-cold blast rate passage after utilizing nethermost superficial part goaf with low temperature ground temperature and waste and old tunnel as the superficial part goaf on top and the precooling of waste and old tunnel reduces the new tunnel of driving and reduces heat waste.Stop in the winter time precooling fan, utilize superficial part goaf and many places, waste and old tunnel to link to each other with the earth's surface and consist of the accumulation of heat in summer of natural ventilation wind path discharge rock mass, thus the heat balance of realization underground ventilating system.And supporting underground ventilating long distance control system, realize the precooling fan remote activation, stop, inverted ventilation, carry out the on-line monitoring of the toxic and harmful concentration such as wind speed air quantity, aerial temperature and humidity, CO after superficial part goaf and waste and old tunnel and the precooling.
The present invention has following good effect by above technical scheme:
(1) regulates the control mine and enter distinguished and admirable ventilation circuit in summer, winter.According to the variation of earth's surface, place, mining area average temperature of the whole year, the opening ways of the wind path UNICOM mode in superficial part goaf and waste and old tunnel, deep downcast, operation stage casing, deep and precooling fan, air door is carried out corresponding adjusting, control.
(2) heat balance of realization underground ventilating system.Can all or part ofly will enter the distinguished and admirable precooling of high temperature of mine summer, reduce the wind enthalpy that enters the deep high-temperature area, increase the heat elimination and cooling ability of system; Stop precooling fan winter, utilize natural ventilation to discharge the accumulation of heat in summer, realize repeatedly thermal balance and utilization that the summer in mine winter replaces.
(3) take full advantage of the mine natural resource, reduce system energy consumption.By regulating deep mining air intake wind path, the low temperature ground temperature that utilizes superficial part goaf and waste and old tunnel to have carries out nature cooling precooling cooling to the high temperature air intake source that transfers to deep mining, adding aeration-cooling technology or the mine air conditioner falling temperature technique that Wind Volume improves the blower fan installed capacity with the dependence that generally adopts in present mine compares, can reduce the blower fan installed capacity, a large amount of refrigeration equipment, refrigeration unit loads that reduce in the mine air conditioner falling temperature technique are saved the ventilation energy consumption.
(4) improve safety, the stability of precooling cooling system, keep and consolidate the precooling cooling-down effect.Whole ventilation system is installed ventilation system Long-distance Control and on-line monitoring system, can realize the Real-Time Monitoring of the long-range start-stop of precooling fan, air inlet fan station blower fan, return fan station blower fan and wind speed air quantity, toxic and harmful, guarantee air intake wind regime wind matter, improve safety, the stability of precooling cooling system, the ventilation system management mode that optimization and upgrading is traditional.
Description of drawings
Fig. 1 be the deep whole distinguished and admirable precoolings in air intake source utilize superficial part goaf and waste and old tunnel ground temperature to deep mining cooling system schematic diagram.
When being the distinguished and admirable precooling of deep air intake source part, Fig. 2 utilize superficial part goaf and waste and old tunnel ground temperature to deep mining cooling system schematic diagram.
Reference numeral is: 1-superficial part downcast; 2-superficial part goaf and waste and old tunnel; The 3-precooling fan; 4-deep downcast; Operation stage casing, 5-deep; The 6-returnairshaft; The 7-air door; 8-natural ventilation wind path; 9-air inlet fan station; 10-return fan station.
The specific embodiment
For further describing the present invention, below in conjunction with drawings and Examples the technology that the present invention utilizes superficial part goaf and waste and old tunnel ground temperature that deep mining is lowered the temperature is described in further detail.
Utilize superficial part goaf and waste and old tunnel ground temperature by the deep whole distinguished and admirable precoolings in air intake source shown in Figure 1 can be found out deep mining cooling system schematic diagram, earth's surface high temperature air in summer (being higher than 3～5 ℃ of local average temperatures of the whole year) is descending along superficial part downcast 1, under the suction function of the precooling fan 3 in superposed (n-1) individual superficial part goaf and stage casing, 2 place, waste and old tunnel (operation of precooling fan pull-out type), with the whole fresh distinguished and admirable introducing superficial part goafs of mine air intake and waste and old tunnel 2, the low temperature rock mass in air intake and superficial part goaf and waste and old tunnel 2 carries out interchange of heat, distinguished and admirable enthalpy reduces, and airflow temperature reduces.Have the goaf of superficial part rock mass of low temperature and the distinguished and admirable precooling in waste and old tunnel 2 through each layer, import nethermost superficial part goaf and this layer of the 2(precooling fan 3 forced operations of waste and old tunnel), all precooling is distinguished and admirable descending along deep downcast 4, behind the forced blower fan at air inlet fan station 9, transfer to operation stage casing, deep 5, under the exhaust fan effect of air at return fan station 10 of work plane dirt, discharge the earth's surface along returnairshaft 6, realize the aeration-cooling of deep operating environment.In this case, air door 7 is closed, by distinguished and admirable and natural ventilation wind path 8 partitions in superficial part goaf and waste and old tunnel 2.
Utilize superficial part goaf and waste and old tunnel ground temperature during by air intake source part distinguished and admirable precooling in deep shown in Figure 2 are found out deep mining cooling system schematic diagram, superficial part downcast 1 part is distinguished and admirable to enter in superficial part goaf and the waste and old tunnel 2 under precooling fan 3 effects, through descending along the ventilation wind path between the goaf behind the precooling fan 3.Change the precooling fan 3 at undermost superficial part goaf and 2 places, waste and old tunnel into forced layout, jointly flow to operation stage casing, deep 5 after distinguished and admirable distinguished and admirable mixing the with directly enter deep downcast 4 from the earth's surface after the precooling, realize the distinguished and admirable precooling of part in air intake source, deep.
Winter is in the low temperature situation in earth's surface (being lower than 3～5 ℃ of local average temperatures of the whole year), stop precooling fan 3, open air door 7, the natural ventilation wind path 8 that superficial part goaf and waste and old tunnel 2 and earth's surface are consisted of communicates, under the natural airflow effect with summer the distinguished and admirable heat of bringing the low temperature rock mass into discharge the earth's surface.The descending middle control downcast of air intake in winter and superficial part goaf distinguished and admirable allows the fresh distinguished and admirable deep that directly enters, earth's surface, and the distinguished and admirable heat absorption on the way of reduce with control heats.
In implementation, the present invention utilizes superficial part goaf and waste and old tunnel ground temperature to the technology of deep mining cooling is also supporting ventilation system Long-distance Control and online monitoring system to be arranged, can realize the blower fan remote activation, stop, inverted ventilation, the toxic and harmful concentration on-line monitoring functions such as wind speed air quantity, aerial temperature and humidity, oxygen, carbon dioxide, carbon monoxide, nitrogen dioxide.
Claims (4)
1. one kind is utilized superficial part goaf and waste and old tunnel ground temperature to the technology of deep mining cooling, and air inlet fan station (9) is set outside the air intake in operation stage casing, deep (5), and return fan station (10) is set outside the air outlet in operation stage casing, deep (5); Described air inlet fan station (9) links with deep downcast (4); Described return fan station (10) links with returnairshaft (6); It is characterized in that: in the superficial part goaf and each exit of waste and old tunnel (2) precooling fan (3) respectively is set, the quantity of precooling fan (3), parameter are carried out quantitative calculating according to thermophysical parameter, the thermophysical parameter in operation stage casing, deep (5), air balance law, the energy balance law of summer earth's surface average temperature of the whole year, superficial part goaf and waste and old tunnel (2), and its quantity is set as n; In the superficial part goaf and waste and old tunnel (2) natural ventilation wind path (8) of sharing air door (7) is set; Import after the wind path parallel connection of superposed (n-1) individual superficial part goaf and waste and old tunnel (2) and be connected to nethermost superficial part goaf and waste and old tunnel (2); It is T ℃ that local average temperature of the whole year is set, and the opening ways of the wind path UNICOM mode in superficial part goaf and waste and old tunnel (2), deep downcast (4), operation stage casing, deep (5) and precooling fan (3), air door (7) is:
(1) when earth's surface temperature 〉=(T+4) ℃, nethermost superficial part goaf and waste and old tunnel and deep downcast, operation stage casing, deep order UNICOM close air door, open whole precooling fans;
(2) when (T-4) ℃＜at earth's surface temperature＜(T+4) ℃, nethermost superficial part goaf and waste and old tunnel and deep downcast, operation stage casing, deep order UNICOM, close air door, opening section precooling fan, precooling fan are opened quantity according to thermophysical parameter, the thermophysical parameter in operation stage casing, deep, air balance law, the energy balance law in earth's surface average temperature of the whole year, superficial part goaf and waste and old tunnel carried out quantitative calculating at that time;
(3) when earth's surface temperature≤(T-4) ℃, open air door, stop precooling fan, in such cases, the superficial part downcast directly and the deep downcast link.
2. one kind is utilized superficial part goaf and waste and old tunnel ground temperature to the technology of deep mining cooling, and air inlet fan station (9) is set outside the air intake in operation stage casing, deep (5), and return fan station (10) is set outside the air outlet in operation stage casing, deep (5); Described air inlet fan station (9) links with deep downcast (4); Described return fan station (10) links with returnairshaft (6); It is characterized in that: in the superficial part goaf and each exit of waste and old tunnel (2) precooling fan (3) respectively is set, the quantity of precooling fan (3), parameter are carried out quantitative calculating according to thermophysical parameter, the thermophysical parameter in operation stage casing, deep (5), air balance law, the energy balance law of summer earth's surface average temperature of the whole year, superficial part goaf and waste and old tunnel (2), and its quantity is set as n; In the superficial part goaf and waste and old tunnel (2) natural ventilation wind path (8) of sharing air door (7) is set; Import after the wind path parallel connection of superposed (n-1) individual superficial part goaf and waste and old tunnel (2) and be connected to nethermost superficial part goaf and waste and old tunnel (2); It is T ℃ that local average temperature of the whole year is set, and the opening ways of the wind path UNICOM mode in superficial part goaf and waste and old tunnel (2), deep downcast (4), operation stage casing, deep (5) and precooling fan (3), air door (7) is:
(1) when earth's surface temperature 〉=(T+3) ℃, nethermost superficial part goaf and waste and old tunnel and deep downcast, operation stage casing, deep order UNICOM close air door, open whole precooling fans;
(2) when (T-3) ℃＜at earth's surface temperature＜(T+4) ℃, nethermost superficial part goaf and waste and old tunnel and deep downcast, operation stage casing, deep order UNICOM, close air door, opening section precooling fan, precooling fan are opened quantity according to thermophysical parameter, the thermophysical parameter in operation stage casing, deep, air balance law, the energy balance law in earth's surface average temperature of the whole year, superficial part goaf and waste and old tunnel carried out quantitative calculating at that time;
(3) when earth's surface temperature≤(T-3) ℃, open air door, stop precooling fan, in such cases, the superficial part downcast directly and the deep downcast link.
3. one kind is utilized superficial part goaf and waste and old tunnel ground temperature to the technology of deep mining cooling, and air inlet fan station (9) is set outside the air intake in operation stage casing, deep (5), and return fan station (10) is set outside the air outlet in operation stage casing, deep (5); Described air inlet fan station (9) links with deep downcast (4); Described return fan station (10) links with returnairshaft (6); It is characterized in that: in the superficial part goaf and each exit of waste and old tunnel (2) precooling fan (3) respectively is set, the quantity of precooling fan (3), parameter are carried out quantitative calculating according to thermophysical parameter, the thermophysical parameter in operation stage casing, deep (5), air balance law, the energy balance law of summer earth's surface average temperature of the whole year, superficial part goaf and waste and old tunnel (2), and its quantity is set as n; In the superficial part goaf and waste and old tunnel (2) natural ventilation wind path (8) of sharing air door (7) is set; Import after the wind path parallel connection of superposed (n-1) individual superficial part goaf and waste and old tunnel (2) and be connected to nethermost superficial part goaf and waste and old tunnel (2); It is T ℃ that local average temperature of the whole year is set, and the opening ways of the wind path UNICOM mode in superficial part goaf and waste and old tunnel (2), deep downcast (4), operation stage casing, deep (5) and precooling fan (3), air door (7) is:
(1) when earth's surface temperature 〉=(T+5) ℃, nethermost superficial part goaf and waste and old tunnel and deep downcast, operation stage casing, deep order UNICOM close air door, open whole precooling fans;
(2) when (T-5) ℃＜at earth's surface temperature＜(T+4) ℃, nethermost superficial part goaf and waste and old tunnel and deep downcast, operation stage casing, deep order UNICOM, close air door, opening section precooling fan, precooling fan are opened quantity according to thermophysical parameter, the thermophysical parameter in operation stage casing, deep, air balance law, the energy balance law in earth's surface average temperature of the whole year, superficial part goaf and waste and old tunnel carried out quantitative calculating at that time;
(3) when earth's surface temperature≤(T-5) ℃, open air door, stop precooling fan, in such cases, the superficial part downcast directly and the deep downcast link.
4. such as claim 1, the 2 or 3 described technology of utilizing superficial part goaf and waste and old tunnel ground temperature that deep mining is lowered the temperature, it is characterized in that: it also is equipped with ventilation system Long-distance Control and on-line monitoring system.
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| CN103410549A (en) * | 2012-12-20 | 2013-11-27 | 兖州煤业股份有限公司 | System and method by means of power plant waste heat for conducting aeration cooling on mine |
| CN103615277A (en) * | 2013-12-09 | 2014-03-05 | 丁文军 | Mine cooling system |
| CN105673058A (en) * | 2016-01-22 | 2016-06-15 | 青岛理工大学 | Method for adjusting temperature of incoming air flow in mine shallow tunnel |
| CN106321138A (en) * | 2016-09-13 | 2017-01-11 | 中钢集团马鞍山矿山研究院有限公司 | Inverted ventilation test method for multi-stage fan station ventilation system in underground metal mine |
| CN108678794A (en) * | 2018-05-17 | 2018-10-19 | 巴彦淖尔西部铜业有限公司 | A method of it is entered the wind using goaf and waste roadway ground temperature preheating mine |
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| CN110030027A (en) * | 2019-06-03 | 2019-07-19 | 东北大学 | A kind of mine air cooling system and method based on thermostat layer cold water source |
| CN110130968A (en) * | 2019-05-14 | 2019-08-16 | 中钢集团马鞍山矿山研究院有限公司 | A kind of antifreeze method for extremely frigid zones underground mine Intake shaft |
| CN113202533A (en) * | 2020-01-13 | 2021-08-03 | 重庆工程职业技术学院 | Assembly and process for automatic ventilation mine |
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| CN103410549A (en) * | 2012-12-20 | 2013-11-27 | 兖州煤业股份有限公司 | System and method by means of power plant waste heat for conducting aeration cooling on mine |
| CN103410549B (en) * | 2012-12-20 | 2015-10-28 | 兖州煤业股份有限公司 | Utilize the System and method for that residual heat of electric power plant is lowered the temperature for mine ventilation |
| CN103615277A (en) * | 2013-12-09 | 2014-03-05 | 丁文军 | Mine cooling system |
| CN103615277B (en) * | 2013-12-09 | 2016-03-16 | 丁文军 | A kind of type pit cooling system |
| CN105673058A (en) * | 2016-01-22 | 2016-06-15 | 青岛理工大学 | Method for adjusting temperature of incoming air flow in mine shallow tunnel |
| CN106321138A (en) * | 2016-09-13 | 2017-01-11 | 中钢集团马鞍山矿山研究院有限公司 | Inverted ventilation test method for multi-stage fan station ventilation system in underground metal mine |
| CN108678794A (en) * | 2018-05-17 | 2018-10-19 | 巴彦淖尔西部铜业有限公司 | A method of it is entered the wind using goaf and waste roadway ground temperature preheating mine |
| CN108678794B (en) * | 2018-05-17 | 2020-02-21 | 巴彦淖尔西部铜业有限公司 | Method for preheating mine inlet air by using ground temperature of goaf and waste roadway |
| CN109595025A (en) * | 2018-12-18 | 2019-04-09 | 河北钢铁集团矿业有限公司 | A kind of air return structure of Underground Metallic Mines |
| CN110130968A (en) * | 2019-05-14 | 2019-08-16 | 中钢集团马鞍山矿山研究院有限公司 | A kind of antifreeze method for extremely frigid zones underground mine Intake shaft |
| CN110030027A (en) * | 2019-06-03 | 2019-07-19 | 东北大学 | A kind of mine air cooling system and method based on thermostat layer cold water source |
| CN113202533A (en) * | 2020-01-13 | 2021-08-03 | 重庆工程职业技术学院 | Assembly and process for automatic ventilation mine |
| CN113202533B (en) * | 2020-01-13 | 2022-08-12 | 重庆工程职业技术学院 | Assembly and process for ventilation mine |
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