ESTIMAING AMOUNT OF EXPLOSIVE FOR FRACTURE PLANE CONTROL BLASTING WITH NOTCHED BOREHOLES
(1.Hengyang Institute of Technology; Hunan 421001; China;
2.Central South University of Technology; Hunan 410083; China)
2.Central South University of Technology; Hunan 410083; China)
Abstract: With the development of fracture mechanics,the fracture plane control blasting with notched borcholes has come into being.This technique is used to create a satisfactory presplit along the contour of an excavation in rock.However,the amount of explosive loaded in each hol usually is determined by trial and error.Because of this,two approaches estimating the amount of explosive for the blasting technique are suggested.
Key words: explosive; fracture plane; control blasting; notched hole