Research on Collaborative Control Technology of Pollutant and Blast Quality in Large Scale Mining of Metal Mines
The large-scale underground mining of metal mines involves a large amount of blasting,which releases high concentrations of pollutants such as CO and dust,causing adverse effects on mining production safety.Conventional smoke con-trol measures such as increasing ventilation volume and spray have low efficiency and long ventilation time,which seriously af-fect production efficiency.In response to the production requirements of collaborative control of underground blasting quality and pollutants,a certain iron mine was taken as the experimental point.Through a combination of multiple on-site experiments and Fluent simulation,the influence of water blasting mud layout on blasting block size and CO concentration in blasting smoke was studied,and a collaborative control layout method for water blasting mud was obtained.The experiment shows that:① U-sing a roll of water foam mud gun plug explosive arrangement,the concentration of gun smoke pollutants is reduced by 20%～30%,and the blasting block size is concentrated in 6～10 cm,which is basically the same as the blasting quality without using water cannon mud.② At the bottom of the blast hole,a roll of water cannon mud is added to connect the explosive arrange-ment,reducing the peak CO concentration by about 35%.The pollutant control effect is slightly improved compared to a roll of water cannon mud,but the blasting rock blocks are concentrated in 10～12 cm,and the blasting quality is significantly re-duced.③ The increase in the quantity of water cannon mud can effectively improve the pollution control effect and shorten the ventilation time.However,water cannon mud also absorbs the impact force brought by explosive detonation,reduces the pres-sure on the rock mass,increases the blasting block size,and affects the blasting quality.
large scale miningtmining blastingwater stemmingpollutannumerical simulation
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