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Full air volume cooling system and method for coal face

A coal mining face and air volume technology, applied in mining equipment, earthwork drilling, mine/tunnel ventilation, etc., can solve problems such as high operating costs, poor cooling effect, and potential safety hazards, and reduce investment and operation cost, improve the effect of cooling and dehumidification, and reduce the effect of maintenance workload

Pending Publication Date: 2019-11-01
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The centralized cold water system can achieve a certain cooling effect, but the mine covers a large area and the cold locations are dispersed. Centrally arranging refrigeration stations will lead to too long cold water delivery pipelines. At the same time, most of the air cooling devices installed on the coal mining face are equipped with explosion-proof fans and other power equipment, resulting in a substantial increase in investment, high operating costs, potential safety hazards, and the inability to achieve full air volume on the working face There is also the problem of poor cooling effect

Method used

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  • Full air volume cooling system and method for coal face
  • Full air volume cooling system and method for coal face

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Such as Figure 1~2 As shown, the coal mining face full air volume cooling system of the present invention includes a chiller 1, an air inlet air cooling device 8 and a return air cooling device 12; the chiller 1 includes a condenser 2, a compressor 3, and an evaporator 4 and a throttle valve 5, the condenser 2 and the evaporator 4 both include two passages, the first passage of the condenser 2, the compressor 3, the first passage of the evaporator 4 and the throttle valve 5 are connected in sequence to form a loop, The inlet air cooling device 8 and the return air cooling device 12 are respectively connected with the second passage of the evaporator 4 of the chiller 1 and the second passage of the condenser 2;

[0035]The inlet air cooling device 8 is installed in the air inlet lane 9 of the coal mining face, and the inlet air cooling device 8 includes a rear damper 22, a rear damper 24 located on the rear damper 22, and a front damper along the direction away from the...

Embodiment 2

[0048] A coal mining face has a width of 200m, an average section perimeter of 14m, an average original rock temperature of 40°C, and an unstable heat transfer coefficient of surrounding rock of 0.003856kW / (m 2 ℃), the air supply volume of the mining face is 1500m 3 / min, before cooling measures are taken, it is assumed that the dry bulb temperature of the coal mining face is 30°C, the relative humidity is 80%, the dry bulb temperature of the return air flow is 36°C, and the relative humidity is 100%; after taking cooling measures, The dry bulb temperature of the wind stream after treatment is 26°C and the relative humidity is 90%. The calculated cooling load of the working face is 2000kW. According to the method of embodiment 1, the full air volume cooling system and method of the coal mining face are installed, wherein the number of recoolers is 15, installed in the total air return lane; the number of air coolers is 8, installed on average in the mining area On both sides...

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Abstract

The invention discloses a full air volume cooling system and method for a coal face, and belongs to the technical field of mine thermal hazard treatment. The system comprises a water chilling unit, afreezing water pump, a cooling water pump, an air inlet air cooling device, an air return air cooling device, a working face, an air inlet roadway, a main air return roadway and corresponding pipelines. The water chilling unit is arranged under a mine, chilled water prepared by the water chilling unit is conveyed to the air inlet air cooling device at the air inlet roadway through a pipeline, andcooling and dehumidifying treatment is carried out on air before entering the working surface. Meanwhile, the air return air cooling device is installed in the main air return roadway of the mine, andcooling water is treated by the return air of the mine. Compared with the prior art, the heat environment in the mine can be improved integrally, the air inlet air cooling device and the air return air cooling device do not need to be driven by power, and a cooling tower does not need to be built. Economic and social benefits are obvious.

Description

technical field [0001] The invention relates to a full air volume cooling system and method for a coal mining face, and belongs to the technical field of mine heat damage control. Background technique [0002] With the increase of mine mining depth, the problem of mine high temperature heat damage is becoming more and more serious. The high-temperature and high-humidity underground climate conditions not only damage the health of workers, but also reduce labor productivity, increase the accident rate, and seriously affect the safe production of coal mines. In order to improve the working environment in mines, improve labor efficiency and safety benefits, for mines with serious heat damage, mechanical refrigeration must be used to cool down the mine, improve the working environment of the mine, and reduce the impact of mine heat damage. [0003] At present, the mine cooling method usually adopts a centralized cooling water system to cool down. Refrigeration units are install...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F3/00E21F1/00E21F1/10
CPCE21F3/00E21F1/006E21F1/10
Inventor 冯小平向前超蔡璐王振平王保齐简俊常穆朝云
Owner JIANGNAN UNIV
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