Multistage Cooling System for Temperature Reduction Of The Working Face In Deep Coal Mines: A Technical-Economic Evaluation

Wang, Tianyang; Wei, Yixuan; Ou, Shengnan; Jin, Longzhe; Wang, Shu; Liu, Jianguo; Zhang, Guoliang; Zhou, Yuzhu; Lin, Minglei

doi:10.2139/ssrn.4333116

Cited by 1 publication

(1 citation statement)

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“…The description of the nature of the movement of the turbulent flow carried out using the realizable k-ε-model [25]. This model has previously been repeatedly used to solve practical problems of mine ventilation and provides better results when compared with experimental measurements [26][27][28]. When determining the boundary conditions, it was assumed that an air flow exits the hole of the forced air duct line, and the mouth of the mine heading has zero excessive pressure.…”

Section: Mathematical Modellingmentioning

confidence: 99%

Optimization of the Combined Ventilation System for Dust Reduction in Blind Headings of Potash Mines

Sukhanov,

Maltsev,

Semin

et al. 2024

MMEP

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Ensuring safe and comfortable working conditions for miners in potash mines is an urgent and unresolved problem, primarily due to the high intensity of dust emissions. This is especially true for poorly studied situations when the main dust source is the area of ore transfer from the borer miner to the shuttle car. In this paper, we explore the possibilities of reducing dustiness in the atmosphere of a blind heading with an operating borer miner through the implementation of a combined ventilation system. This system integrates both exhaust and forcing ventilation ducts extending to the mouth of the blind heading. A significant innovation of this system is the prioritization of the exhaust fan over the blower fan. The efficacy of the proposed system has been evaluated both theoretically and experimentally. The theoretical analysis involved conducting 3D numerical simulations of dust-air distribution in a blind heading. The stationary turbulent flow of the air-dust mixture in the mine was calculated, taking into account the operating borer miner. The model's validity was confirmed against data from a full-scale experiment. A noticeable reduction in dust concentration was observed in the work areas of the borer miner and shuttle car when using the combined ventilation system compared to forcing ventilation. Based on these model findings, pilot tests of the effectiveness of the combined ventilation system were carried out in a real heading of a potash mine. They showed a reduction in dust concentration by 40-52% compared to the original version of the forcing ventilation system.

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Section: Mathematical Modellingmentioning

confidence: 99%