A simulation experiment device for airborne dust migration and control in tunneling roadway

Abstract

The invention discloses a simulation experiment device for airborne dust transportation and control of tunneling roadways. The simulation experiment device comprises a closed simulation testing table, wherein a main simulation roadway and a side simulation roadway are arranged in the closed simulation testing table, the main simulation roadway is arranged in the length direction of the closed simulation testing table, and the side simulation roadway and the main simulation roadway form an angle of 25-35 degrees. The closed simulation testing table on one side of the main simulation roadway is provided with a drainage channel for draining accumulated water. A dust raising device for simulating dust production of the tunneling roadways is arranged at one end of the closed simulation testing table, an air inlet mechanism is arranged at the inlet position of the side simulation roadway, an air outlet mechanism is arranged at the outlet position of the main simulation roadway, multiple fracture surfaces are arranged in the main simulation roadway, and multiple air speed sensors and multiple dust sensors are evenly distributed on each fracture surface. The simulation experiment device for airborne dust transportation and control of the tunneling roadways are used for determining optimum ventilation and dust removal parameters of field operation and improves the dust control efficiency of a tunneling field.

Description

technical field [0001] The invention relates to a tunneling roadway simulation experiment device, in particular to a tunneling roadway airborne dust migration and control simulation experiment device. Background technique [0002] According to the actual measurement, the dust concentration can be as high as 5000mg / m in the fully mechanized excavation working face in my country without any dust control measures. 3 , and the proportion of respirable dust is close to 40%. Even if dust control measures are taken, the dust situation in most of the working faces is still quite bad, and the dust concentration has seriously exceeded the national standard. Among the existing dust control measures for tunneling at home and abroad, ventilation and dust removal is one of the most important means, especially the finale mixed ventilation and dust removal method in which the extraction fan is the dust removal fan is the most common application. However, for a long time, tunneling air The...

AI Technical Summary

Problems solved by technology

Among the existing dust control measures for tunneling at home and abroad, ventilation and dust removal is one of the most important means, especially the finale mixed ventilation and dust removal method in which the extraction fan is the dust removal fan is the most common application. However, for a long time, tunneling air The migration status of loaded dust has not been accurately described, which limits the development of ventilation and dust removal technology

At present, due to the lack of simulation experimental equipment, the law of airborne dust migration in excavation tunnels is often obtained through on-site measurement or numerical simulation. Mine excavation tunnels are mainly for production, and it is difficult to allocate a large amount of manpower, material resources and energy to carry out airborne dust transportation on site. There are certain errors in numerical simulation when describing the movement of airborne dust, and the control of airborne dust cannot be targeted, and the high concentration of dust in the production site cannot be accurately controlled

Images