ANALYTICAL RESEARCH OF THE REGULARITIES OF MICRO-CHIP FORMATION WHEN CUTTING STONES FOR CONSTRUCTION WORKS

Abstract

Cutting stone for construction work is carried out by disc diamond wheels, the rotation speed, which, therefore, the cutting speed is 35-50 m / s. Due to the high intensity of the cutting process and intense microchip formation, the process of cutting the stone is accompanied by significant dust formation, which can be both harmful and dangerous during work.

The sedimentation rate of particles depends significantly on the shape: the higher the sphericity, the higher the sedimentation rate. The particles obtained by cutting basalt and concrete have the same settling rate. The settling rate of dust from granite is much higher. The size of the chips when cutting is in the range of 0.4...6 microns. The concentration of dust in the working space was determined in the amount of 4,8∙10⁸ pcs/m³. It has been proven that when working at a height of about 2 m (200 cm) during the working cycle (about 3 minutes), dust will remain at a height of about 1.5 m, that is, practically in the working area.