Study on Dust Concentration Control Index during Construction of High Altitude Tunnel

In view of the high altitude tunnel construction dust serious threat to the health of the construction workers. By investigating the characteristics of high-altitude climate, the influence of climate at different altitudes on blood oxygen saturation and human respiration was analyzed, and the dust concentration control index during the construction period of high-altitude drilling-blasting tunnel was studied. The results show that with the elevation increasing, the dust concentration index correction coefficient decreases and the dust concentration control index decreases. This is due to the gradual decrease of atmospheric pressure, the decrease of oxygen content and partial pressure of oxygen in the air, leading to the decrease of human blood oxygen saturation, the acceleration of human respiratory frequency, and the increase of dust inhalation per unit time. Therefore, it is necessary to reduce the concentration of dust in the construction environment to control the amount of dust inhaled by the human body, so as to ensure the health of the construction personnel.