ZHANG Lei，XU Zhimin，YUAN Huiqing，et al. Construction and implementation of emission reduction and treatment technology system in deep mining of high salt mine water[J]. Coal Science and Technology，2023，51（12）：208−219
. DOI: 10.12438/cst.2023-0876| Citation: |
ZHANG Lei，XU Zhimin，YUAN Huiqing，et al. Construction and implementation of emission reduction and treatment technology system in deep mining of high salt mine water[J]. Coal Science and Technology，2023，51（12）：208−219 . DOI: 10.12438/cst.2023-0876
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With the improvement of mine water discharge standards, the demand for technological innovation in mine water treatment and resource utilization has been further enhanced. Reducing the discharge of mine water, especially high salt mine water, and improving the availability of mine water are important guarantees for improving coal production safety, accelerating green mine construction, and promoting sustainable development of coal enterprises. Focused on the problems of high water inflow, high salinity and high cost of treatment and utilization during deep mining of Zhangshuanglou Coalmine, a treatment technology system of mine water emission reduction in high salt mine with “reduction, storage and purification” as the core was put forward: Blocking the water inflow points through the floor water inflow blocking reduction technology to reduce the discharge of high salt mine water from the source; Through the deep reinjection technology of mine water, some mine water will be transferred and stored in depth to realize the “zero discharge” and water conservation of mine water; Through the technology of coal and rock self-purification in goaf, the high-salt mine water is carried out by regulation and storage; Through surface deep desalting treatment technology, high salt mine water purification treatment, resource utilization or standard discharge can be realized. Further, combined with the hydrogeological background of the mine, the law of mine water gushing and the status quo of mine water treatment and utilization, the feasibility of the application of the above technology in the mine was comprehensively analyzed and evaluated: Through the implementation of floor water gushing plugging reduction technology, the reduction treatment of 188 m3/h floor four ash gushing water was realized; Through deep reinjection technology, 200 m3/h recharge storage and water conservation restoration of Ordovician limestone aquifer can be realized in the west wing mining area; About 1.65 million m3 of mine water can be stored in the east wing mining area through self-cleaning pretreatment of coal and rock in goaf and regulation storage technology, and the underground pretreatment of characteristic components can be carried out; Through the surface deep desalination treatment technology, the mine water treatment capacity reaches 700 m3/h, and the annual salt discharge can be reduced by 14 271.5 t. Finally, the comprehensive technical idea of water emission reduction treatment of high salt mine in Zhangshuanglou Coalmine is put forward. The proposal of the water emission reduction treatment technology system of the high-salt mine in Zhangshuanglou Coalmine can provide a theoretical basis and technical reference for the water reduction treatment and resource utilization of high-salt mine in Zhangshuanglou Coalmine and other similar deep mining coal mines.
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