WALL CONTROL AND CONTOUR BLASTING TO ENSURE THE STABILITY OF THE QUARRY BOARDS WHEN OPERATING DRILLING AND BLASTING WORKS

The main limitation imposed on the conduct of drilling and blasting operations in the near-contour zone of a quarry is the need to protect the sides of the quarry and engineering structures on the sides from the seismic effects of massive explosions. As practice shows, the most effective and proven method of protecting the pit walls is the use of contour blasting, skewing the pit walls, preceding a massive explosion. A method for the formation of stable slopes of the sides of a quarry, an excavator method for sloping ledges on the limiting contour of a quarry and a method for initiating borehole charges of explosives in the near-contour zone of a quarry have been developed and introduced into the industry.