A P Explosives Private Limited

Vikrampuri, Secunderabad, Telangana

APSODs are used in conjunction with safety fuses. The spit of fire from the safety fuse initiates the ASA charge which then detonates the PETN charge. This in turn will initiate the ANFO or cartridge explosives.

APSODs in conjunction with safety fuses are based on non-electric initiation by nature and are used widely as a safe alternative in dry as well as moist locations and in non-gassy underground mines. They are used in open cast blasting applications/non-gassy mining, road construction, surface excavation, stone and metal quarrying.

Special ordinary detonators 100 numbers are first packed in a paper carton. 5 such cartons are wrapped in a craft paper. Twenty such packets are placed in a double walled wooden case with bitumen liner inside. The case is then marked with important details such as manufacturers name, date of manufacturing, quantity, net weight, gross weight and batch number.

DTH detonators are developed to provide accurate down the hole-delay in the blast. It consists of a shock tube of required length, with delay detonator and a suitable connector. In order to arrest the ingress of water, the connector end is sealed. The other end of the tube is crimped to a delay detonator with a suitable plug.

These are used for surface blasting, quarrying and long hole-blasting.

1. True bottom initiation is achieved
2. Ground vibration is controlled
3. Air blast noise is minimized
4. Good fragmentation
5. As the explosive shock wave is confined, there is no desensitization of explosives. This results in higher explosive efficiency.
6. Risk of accidental initiation due to stray current, static charges and radio frequency signals is ruled out.