RESEARCH OF THE INFLUENCE OF DYNAMIC LOAD ON PROTECTED OBJECTS FROM BLASTING OPERATIONS IN THE QUARRY OF JSC "TOMINSKY MPP"
He article presents the results of the assessment of the impact of blasting operations during the development of the JSC "Tominsky MPP" on protected objects located on the territory of the mining branch of the quarry and in nearby settlements. During the research, the analysis and generalization of theoretical and experimental studies were used, including methods of multi-channel recording of mechanical vibrations of the soil by three-channel seismic recorders through analog-to-digital conversion of voltage input signals, as well as methods of field and production experiments. For field studies, seismic recorders were used, both of domestic production - URAN, and analogues of foreign production - Minimate Plus. In total, two series of measurements of seismic vibrations and shock air waves were carried out, including the registration of three to five explosions per shift with a mass of explosives up to 50 tons per explosive unit. To perform two series of measurements of the impact of negative factors of blasting, the studied area was conditionally divided into two impact zones: 1 - the nearest zone located at the points of the cordon of the hazardous area of blasting (on average at a distance of 1 km from the exploding blocks; 2 - the far zone, including the territory of the nearest settlements (near objects with an outraged population). As a result of the conducted research, the following have been established: features of the propagation of wave processes in a complex-structured rock mass based on field measurements; values of permissible seismic vibration rates; rational parameters of drilling and blasting operations, providing seismic vibrations and pressure at the front of the shock air wave within acceptable values, when developing a field in the direction of protected objects.