Coal-geothermal water collaborative mining method based on subsidence column water guide channel

Abstract

The invention discloses a coal-geothermal water collaborative mining method based on a water guiding channel of a collapsed column. While mining coal, the water guiding channel between the collapsed column and a geothermal reservoir is fully utilized as a geothermal water collection area. Geothermal mining. After the mining of the working face, a heat exchange station is established in the roadway formed along the goaf and in the chamber, and geothermal wells are excavated through the drilling chamber. The water returns to the pipe, and the ends of the two are separated by a certain distance. The geothermal water is extracted to the heat exchange station through the geothermal water pumping pipeline, and the heat energy is extracted and transported to the ground for use; after the heat is extracted, it is reinjected into the geothermal reservoir through the tail water reinjection pipeline to control the stability of the rock formation and realize the geothermal energy. Sustainable extraction of hot water. At the same time, coal mining can be carried out at the same time on the next working face, realizing the coordinated mining of coal-geothermal water. The mining method of the invention has the advantages of high resource utilization rate, low geothermal water mining cost, and turning the water guide channel around the collapsed column from harm to benefit.

Description

technical field [0001] The invention relates to a coal and geothermal mining method, in particular to a coal-geothermal water collaborative mining method based on a water guiding channel of a collapse column, which belongs to the field of underground resource mining. Background technique [0002] my country's coal resources are abundant and widely distributed, and the efficient mining and utilization of coal will make a significant contribution to my country's energy supply. In recent years, the depth of coal mining has increased year by year, which has also brought new technical difficulties, such as high ground temperature in mines. In order to solve the mining problems caused by high ground temperature, geothermal mining has become a hot research topic in line with the concept of efficient resource utilization, and its mining technology and concept have been continuously improved and developed. Therefore, scholars have proposed a coal-geothermal water collaborative minin...

AI Technical Summary

Problems solved by technology

The rock mass around the collapsed column is loose and broken, and there is a natural water-conducting fissure network. Coupled with the influence of deep high ground stress and mining disturbance, it is likely to connect the aquifer and the coal mining operation space, causing mine water inrush disasters, causing casualties and property loss

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