Research carried out proves that blast seismic effect i.e. displacement velocity in a seismic wave and efficiency are the function of specific charge with rock mass contact surface. Dependence of blasting fragmentation coefficient from diameters and charge density variation is given.
In given article the opportunity of use of the data on reaction of the destroyed environment to dynamic influence at the explosive destruction is considered, the parameters of speed and acceleration displacement of environment received by tool measurements and allowing purposefully to correct conditions pressurization depending on properties of a destroyed environment.
The paper analyzes the issue of seismic protection of the environment during drilling and blasting of tunnels. On the basis of experimental studies, an estimation of the size of the elastic-plastic deformation zone formed by the explosion is considered. A method for determining the parameters of seismic blast waves and their attenuation coefficients in the near explosion zone is proposed.
The subject of the research was the state of safety of buildings of engineering structures and the environment, located in the zone of influence of mining operations, under the influence of seismic and shock air waves from the production of blasting operations. In the research work full-scale measurements of arguments of seismic and shock air waves in the requirements of production of mass explosions and lump crushing at different blasting schemes both on mining and geological and meteorological requirements were carried out. Optimal requirements to the organization and production of blasting operations are proposed.
The object of the research is the state of safety of buildings of engineering structures and the environment, located in the zone of influence of mining operations under the influence of seismic blasting and shock air waves from blasting operations. Full-scale measurements of parameters of seismic blasting and shock air waves during mass blasting and oversize crushing with various blasting schemes in various mining and geological and meteorological conditions have been carried out. Optimal conditions for organization and production of blasting operations are proposed.
The intensity of the airborne shock wave (AHW) impact on the structures located in the area of blasting operations, when designing blasting operations, is estimated by the value of excess pressure at the front of the wave. As an admissible level of exposure is usually taken the overpressure at the front of the shockwave 700-800 Pa, at which the destruction of glazing of buildings does not occur. However, the dynamic waves formed during the explosion with a pressure drop of about 1 kPa with low (16-60 Hz) and infra-low frequencies can cause dizziness and headaches in the population.
Крупные массовые взрывы и интенсификация отбойки горных пород на действующих карьерах, расположенных вблизи зданий и инженерных сооружений, обуславливают необходимость прогнозирования действия ударных воздушных волн (УВВ), так как они могут, представлять определенную опасность ...
