Study on Numerical Simulation of Fire Danger Area Division in Mine Roadway

Abstract

High-temperature poisonous smoke produced by coal mine roadway fire seriously affects miners' lives and safety. Studying the development law of high-temperature smoke in the process of mine roadway fire and then exploring the danger of roadway are of great significance to personnel safety and post-disaster rescue. In order to study this problem, the CFD numerical simulation method is used to establish a fire calculation model based on ANSYS Fluent software in the development stage of mine fire. The high-temperature flue gas flow in the roadway during the development stage of mine fire is simulated, and the variation law of temperature field and gas concentration field with time and space position under different levels of roadway in the development stage of fire is revealed. The variation rules of environmental parameters, such as temperature, CO, and CO2, are obtained by numerical calculation. Based on these, the danger zones of smoke spread in fire development stage are divided by the critical values of high-temperature smoke and toxicity evaluation index, and the mathematical fitting analysis of the evolution of the dangerous area with time is carried out. The research results have certain theoretical guiding significance for reducing underground environmental pollution and ensuring the personal safety of workers and rescuers.

Optimization and Investigation of Rapid Sealing Technology Based on Mine Disaster Period

“…For the B1 matrix, the maximum eigenvalue is 5.023, CI = 0.006, RI = 1.11, and CR = 0.005 < 0.1, and the consistency test result is passed. For the B2 matrix, the maximum Fire 2023, 6,378 eigenvalue is 4.019, CI = 0.006, RI = 0.882, and CR = 0.007 < 0.1, and the consistency test result is passed.…”

“…When conducting fire rescue underground, if the fire cannot be directly extinguished within 1-2 h of development, there is a risk of gas explosion in the disaster area with sufficient oxygen. From this perspective, it is necessary to quickly and effectively establish underground enclosed facilities to isolate the disaster area and reduce oxygen supply to prevent further expansion of the disaster [4][5][6][7]. Thus, rapid sealing technology is a practical disaster relief technology that can be used in disaster areas to effectively control the oxygen supply in fire areas.…”

Numerical Simulation of Fire Incidents in Ship Compartments

“…To enhance the authenticity of numerical simulation results for ship compartment fires, this study focuses on the compartments of a 5000-ton bulk carrier vessel. The PyroSim pre-and post-processing software, coupled with the Fire Dynamics Simulator (FDS) [5], is employed to construct corresponding geometric models. The control equations for numerical simulation of ship compartment fires are established based on the principles of energy, momentum, and mass conservation.…”