Working medium phase-change cooling combination device for solving spontaneous combustion of coal mine gangue dump

Abstract

The invention discloses a working medium phase-change cooling combination device for solving spontaneous combustion of coal mine gangue dump. The device comprises an upper tube, a heat conduction tubecomponent, a lower tube, and the like, a water outlet and a water inlet are formed in the upper tube; the upper tube is filled with a circulation water working medium; a lower tube sealing inner cavity is filled with a phase-change water working medium; the upper tube and the lower tube are in sealed connection; the heat conduction tube component penetrates through between the upper tube and thelower tube; a temperature sensation drilling corn is fixedly connected at the lower end of the lower tube. The temperature sensation drilling corn and the lower tube of the working medium phase-changecooling combination device disclosed by the invention extend into a spontaneous combustion layer of coal mine gangue dump, heat generated by the spontaneous combustion layer of the coal mine gangue dump can be conducted outside the coal mine gangue dump through a circulation water working medium, and then the spontaneous combustion layer of the coal mine gangue dump can be finally extinguished since the heat is absorbed; since the heat generated by spontaneous combustion of gangue, and the spontaneously combusted gangue can be extinguished, dust and toxic gases continuously emitted from the gangue in the spontaneous combustion process can be avoided, and thus remarkable benefits of energy conversation, security and environment protection can be achieved.

Description

technical field [0001] The invention relates to a mining cooling device, in particular to a working fluid phase change cooling combined device for controlling the spontaneous combustion of gangue piles in coal mines. Background technique [0002] Coal gangue is the waste in the process of coal mining and coal washing, which usually accounts for 15% to 20% of the coal mining volume. The coal gangue generated during the coal mining process in coal mines is accumulated and stored to form a gangue hill. Due to the height of the gangue hill or the location of the coal mine wellhead For reasons of change, many waste dumps were abandoned. Long-term storage of coal gangue in gangue dumps not only occupies a large amount of land, but also pollutes the atmosphere, soil and water. [0003] Grain size segregation will occur in the process of natural stacking (on flat ground or along slopes) of waste rock, and a "chimney effect" will occur in the waste rock. Part of the heat generated ...

AI Technical Summary

Problems solved by technology

From the perspective of engineering practice at home and abroad, the comprehensive measures based on grouting, supplemented by surface sealing and compaction, and pouring foam fire extinguishing agent are relatively mature and effective control technologies for gangue spontaneous combustion at present, but the construction cost is relatively high

The irrigation method and the direct excavation method have low construction costs, but there is a risk of explosion

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