FIELD TEST OF GROUND PRESSURE-RELIEVING BY CONCUSSION BLASTING

Based on the blast and rockmass detection theories,the design of concussion blasting parame-fers was made. During the field test, the sonic detection of concussion b1ast pressure-relieving holes was done- It is proved that the pressure-relieving by concussion blasting can regulate the stress distribrtion, so that the stability of underground workings increases.