Providing high speed drilling of boreholes with portable pneumatic rock drills in emergency situations

The existing portable pneumatic rock drills are the most suitable for drilling and blasting operations in emergency situations due to their small mass and mobility. However, their main disadvantage is the low drilling speed due to insufficient feed force, especially when drilling holes vertically down. As a result of the development of a mathematical model of the drilling process by portable perforators, it was proposed to use light feeders while maintaining the total mass, increasing the drilling speed up to 2 times. (paper)