An Efficient Mine Ventilation Solution Method Based on Minimum Independent Closed Loops

Abstract

In this paper, according to the analysis of optimum circuits, we present an efficient ventilation network solution based on minimum independent closed loops. Our main contribution is optimizing the circuit dividing strategy to improve the iteration convergence and the efficiency of a single iteration. In contrast to a traditional circuit, a minimum closed loop may contain one or more co-tree branches but fewer high-resistance branches and fan branches. It is helpful in solving the problem of divergence or slow convergence for complex ventilation networks. Moreover, we analyze the dividing rules of closed loops and improve the dividing algorithm of minimum independent closed loops. Compared with the traditional Hardy Cross iteration method, the improved solution method has better iteration convergence and computation efficiency. The experimental results of real-world mine ventilation networks show that the improved solution method converges rapidly within a small number of iterations. We also investigate the influence of network complexity, iterative precision, and initial airflow on the iteration convergence.

Bibliometric analysis and review of mine ventilation literature published between 2010 and 2023

“…Dziurzynski used VentGraph software to simulate and solve mine ventilation networks, thereby validating the mathematical models employed within VentGraph [ 76 ]. Zhong et al introduced an improved MICL algorithm, addressing issues such as divergence and slow convergence in complex ventilation networks [ 77 ]. Shalimov improved the loop flows algorithm to calculate and simulate airflow distribution in emergencies using a quasi-steady-state approximation [ 78 ].…”

Conditions That Determine Changing the Function of Mine Shafts in a Gassy Coal Mine—A Case Study

“…Wang et al [6] dealt with optimizing the performance of refrigeration and ventilation systems to reduce energy consumption. Zhong et al [7] presented an efficient ventilation network solution based on minimum independent closed loops. Szl ązak and Korzec [8] presented the solution for the main fan station for underground mines being decommissioned in terms of reducing energy consumption by ventilation.…”

The Solution of the Main Fan Station for Underground Mines Being Decommissioned in Terms of Reducing Energy Consumption by Ventilation

“…Furthermore, ventilation network regulations must be taken into account, considering miners' safety [3,4]. For this reason, many scientists have used computer programs, CFD simulations, and other optimisation algorithms [5][6][7]. However, the biggest problem with mine-ventilation optimisation occurs in multiple-fan ventilation systems [8][9][10][11].…”