Drilling and blasting has been a preferred method of rock excavation world-wide. Blasting inevitably causes damage to the peripheral rock mass, which culminates in the form of overbreak and damaged zone. Damage or overbreak not only endangers the safety of structure and cost escalation but also delayed...

A canal was proposed to be excavated by blasting nearby a village with hutments and an overhead water tank in very close proximity. The structures mentioned were as near as 18 m from the proposed excavation. Trial blasts were conducted by CSIR-CIMFR to ascertain the vibration attenuation parameters and...

Mining is a hazardous activity and capital intensive in nature too.  The cost of stoppage of mines, for any reason, for few hours is enormous. The mines need to minimise the stoppage times to improve productivity and to reduce costs. Mining companies should have to go for large size blasts to achieve...

Amajor concern in deep hole blasting in open cast mining operation is the excessive generation of ground vibration and their effect on nearby industrial infrastructures and residential dwellings of local community. A poor blast output results in lower productivity of excavators which has a paramount...

Drilling and blasting is still the most prolific way to extract minerals and associated waste from the earth, more so in case of hard rocks with uniaxial compressive strength greater than 50 MPa. Considering the growing demand for these minerals reducing ground vibrations, air vibrations, fly rocks,...

Since the invention of Gunpowder in 1860 by Alfred Nobel mining industry was in need of initiating devices which helps in increasing blast size, improve safety during charging & blasting operation, as well as explosive performance. From Plain detonators & Safety fuse system to Shock-tube initiation system,...

Mining companies the world over are seriously looking at the 'total cost concept' having fully realized the benefits of good fragmentation and muckpile looseness achieved in the primary blasts itself. Good blast planning and accurate monitoring of the various operations holds the key to reaping and realizing...

Ground vibration resulting from blasting, has become a critical environmental issue with the increasing mining activities in areas close to human settlements and many a times the locals resist the blasting even though it is not causing damage to their structures. In general, apprehensions or perceptions...

This paper deals with the excavation of 19500 m2 area in granitic hard rock to a depth of 10 m by controlled blasting to accommodate foundation for 75 m tall, 16 floor commercial building in the city of Bengaluru, India. The major task was to excavate granitic hard rock close to constructed residential...

One of the challenging job in irrigation and surface dam construction projects is excavation of large quantity of rock in short period of time and achieving the final stable walls. Indira Sagar Polavarm Irrigation Project in India is one such project required about 36.5 million cubic meter of hard rock...

Blasting is considered to be one of the significant unit operations in the open pit mines for achieving higher production and productivity. As the blasting operation has been carried out frequently in deep open pit mines, the disturbance in the form of structural damages or psychological issues are also...