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Title:
COAL-TERRESTRIAL HEAT COLLABORATIVE MINING METHOD BASED ON FAULT WATER CONDUCTING FISSURE ZONE
Document Type and Number:
WIPO Patent Application WO/2021/232905
Kind Code:
A1
Abstract:
A coal-terrestrial heat collaborative mining method based on a fault water conducting fissure zone, which fully utilizes a geothermal water collection zone (1) for coal-terrestrial heat collaborative mining. A heat energy exchange station (10) is built in a roadway and a chamber formed along a goaf after mining on a working surface; a geothermal well is excavated by means of a drilling chamber; a geothermal water extraction pipeline (12) is separately arranged to the geothermal water collection zone; and a tail water reinjection pipeline (11) is arranged to a geothermal reservoir (13), and the tail ends of the tail water reinjection pipeline and the geothermal water extraction pipeline are separated by a certain distance. Geothermal water is extracted to the heat energy exchange station by means of the geothermal water extraction pipeline, and heat energy is extracted and then transported to the ground for use; and after the heat is taken, tail water is reinjected into the geothermal reservoir by means of the tail water reinjection pipeline to control the stability of a rock formation and implement the sustainable mining of the terrestrial heat. Moreover, coal mining can be performed at the same time on the next working surface, implementing the coal-terrestrial heat collaborative mining. The mining method has the advantages of high resource utilization rate, low terrestrial heat mining and utilization costs, and turning the harm of the fault water conducting fissure zone into benefits.

Inventors:
MA, Dan (CN)
ZHANG, Jixiong (CN)
KONG, Saibo (CN)
FENG, Xiujuan (CN)
WANG, Jiajun (CN)
LI, Meng (CN)
ZHANG, Qiang (CN)
ZHOU, Nan (CN)
SUN, Qiang (CN)
HUANG, Yanli (CN)
Application Number:
PCT/CN2021/080410
Publication Date:
November 25, 2021
Filing Date:
March 12, 2021
Export Citation:
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Assignee:
CHINA UNIVERSITY OF MINING AND TECHNOLOGY (CN)
International Classes:
E21B43/00; E21C41/18; G01D21/02; F24T10/20
Attorney, Agent or Firm:
JIANGSU SUNDY LAW FIRM (CN)
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