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A method for cooling and cooling cogeneration coal seams by water injection

A coal seam water injection, cooling and heating technology, applied in earthwork drilling, safety devices, mining equipment, etc., can solve the problems of resource waste, low temperature water not being fully utilized, etc., and achieve energy saving and good cooling effect

Inactive Publication Date: 2016-03-23
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heat pumps can consume a small amount of electricity and turn a large amount of low-temperature heat energy that cannot be directly used into useful high-temperature heat energy to meet the heating needs of ground buildings. However, the low-temperature water generated during the thermodynamic cycle is often not fully utilized, resulting in waste of resources.

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  • A method for cooling and cooling cogeneration coal seams by water injection

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specific Embodiment approach

[0014] The cooling and heating cogeneration coal seam water injection cooling method of the present invention, its preferred embodiment is:

[0015] The low-temperature waste water generated by the ground heat pump is comprehensively used, and sent to the underground through the insulated water pipe, and the drill holes are arranged in the roadway near the coal mining face, and the low-temperature water is injected into the high-temperature coal body through the drill holes, so that the rock mass around the coal mining face is cooled.

[0016] The water outlet of the evaporator of the heat pump is externally connected with a large-diameter thermal insulation water pipe, which is used as a water injection main pipe and sent to the downhole through the auxiliary well;

[0017] The water injection main pipe is sent to each mining area along the air inlet road, and is tapped with small-diameter thermal insulation water pipes, which are water injection branch pipes, which are sent t...

specific Embodiment

[0022] Such as figure 1 As shown, the water outlet 1 of the heat pump evaporator 2 is externally connected with a large-diameter thermal insulation water pipe 9, which is sent to the underground through the auxiliary shaft 10 (inlet shaft), and sent to each mining area along the air inlet road 11. Face 16, thermal insulation water pipe 9 enters the wind uphill through the mining area 13, the short working face enters the wind along the trough 15, and sends it to the vicinity of the short working face 16, and drills a downward long hole with a length of 30-100m along the direction of the coal seam inclination parallel to the working face 17. Perform static pressure or dynamic pressure water injection; for the long working face 23 with a long length, the thermal insulation water pipe 9 passes through the mining area and goes down the mountain 20. The direction is parallel to the working face, and the downward long hole 24 with a length of 30-100m is drilled to perform static pre...

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Abstract

The invention discloses a cooling and heating combined coal seam water injection cooling method. Low-temperature waste water generated by a ground heat pump is comprehensively utilized and is fed under a well through a heat preservation water pipe, drill holes are formed in a roadway near a coal face, the low-temperature water is injected into high-temperature coal bodies through the drill holes, and rock bodies around the coal face are cooled. The method not only can effectively precool high-temperature coal bodies near the coal face to achieve the good cooling effect, but also can effectively utilize the low-temperature water generated in the thermodynamic cycle process to save energy resources.

Description

technical field [0001] The invention relates to a technology for controlling heat hazards in mines, in particular to a method for cooling and cooling cogeneration coal seams by injecting water into them. Background technique [0002] In many deep mines, the original temperature of the surrounding rock is high, which is often the main reason for the high temperature in the mine. When there is a temperature difference between the original rock temperature of the surrounding rock and the temperature of the air flowing in the shaft, heat exchange will occur. Even in mines that are not too deep, the original rock temperature generally exceeds the wind flow temperature, that is, the high-temperature surrounding rock always emits heat to the roadway. In deep mines, the heat dissipation of surrounding rock will be quite large, even exceeding the sum of heat dissipation of other heat sources, and it is often the most important heat source causing high temperature heat damage. There...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F3/00E21F5/02
Inventor 秦跃平杨小彬刘伟孔松吴建松宋怀涛郝永江
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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