Method for cooling excavation working face of underground mine

Abstract

The invention relates to a method for cooling an excavation working face of an underground mine. Water, ammonium nitrate and sodium phosphate dibasic dodecahydrate in a ratio of 0.4:0.9:1 are mixed to prepare a refrigerating fluid, and a large amount of heat in surrounding air is absorbed, so that the cooling purpose is achieved. The method comprises the steps as follows: water is injected to a metal reactor; powdery ammonium nitrate and sodium phosphate dibasic dodecahydrate are added; ammonium nitrate and sodium phosphate dibasic dodecahydrate have an endothermic reaction; after the reaction is finished, water in a certain ratio is added, so that a small part of residual ammonium nitrate is utilized sufficiently, and the refrigerating time is extended; and the specific amount is adjusted according to air-conditioning requirements and cooling requirements of working faces of different mines. The method for cooling the excavation working face of the underground mine is low in cost and good in cooling effect, and cannot pollute the environment.

Description

technical field The invention belongs to a cooling method for mines, in particular to the cooling of mining working faces in underground mines. Background technique Type the Background Technical Description paragraph here. With the deep coal mining, the problem of mine heat damage is becoming more and more serious. Working in a high-temperature environment can easily affect the physiological and psychological state of the human body, work efficiency, and cause various accidents. At present, most domestic mines adopt various cooling methods, such as mine cooling system and cooling method (Notice No. CN101344009); application of chemical refrigeration methods in emergency shelters (Notice No. CN102748060A); CN101294498); tunnel spraying (fog) cooling method (notification number CN101105137); cooling method and equipment during the construction of deep coal mines (notification number CN101225747); mine local cooling method and cooling fan (notification number CN101864981A); ...

AI Technical Summary

Problems solved by technology

Working in a high-temperature environment can easily affect the physiological and psychological state of the human body, work efficiency, and cause various accidents

At present, most domestic mines adopt various cooling methods, such as mine cooling system and cooling method (Notice No. CN101344009); application of chemical refrigeration methods in emergency shelters (Notice No. CN102748060A); CN101294498); tunnel spraying (fog) cooling method (notification number CN101105137); cooling method and equipment during the construction of deep coal mines (notification number CN101225747); mine local cooling method and cooling fan (notification number CN101864981A); mine salt water cold storage Vehicles used for partial cooling of mines (Notice No. CN1051776); tunneling roadway heat insulation diversion heat exhaust cooling method (Notice No. CN102767387A) and other patents. Although these patents have high cooling efficiency, due to the need to configure refrigeration compressors and fans, the cooling equipment is huge. The structure is complex, the water and electricity consumption is high, and the cost is huge. In addition, it is easy to pollute the environment; even if the method is simple, the cooling effect is not good

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