- 産業: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
A detonating cap that fires from 0.02 to 0.5 s after the firing current passes through it.
Industry:Mining
A detonating fuse having an explosive of pentaerythritetetranitrate (PETN). Used in large-scale blasting work, esp. in quarries.
Industry:Mining
A detonating fuse suitable for opencast and quarry mining. It consists of an explosive core of pentaerythritol tetranitrate (PETN) contained within plastic covering. It has an average velocity of detonation of 21,350 ft/s (6,500 m/s). This is practically instantaneous. Cordtex detonating fuse is initiated by electric or a No. 6 plain detonator attached to its side with an adhesive tape.
Industry:Mining
A detonation characterized by the equivalence of the detonation velocity to the velocity of sound in the burned gas plus the velocity of flow of the burned gases.
Industry:Mining
A detonator for use with a safety fuse. It consists of an aluminum tube closed at one end and partly filled with a sensitive initiating explosive. The tube is only partially filled because a plain detonator is always used in conjunction with a safety fuse, and the empty space enables the fuse to be inserted into the tube until it comes into contact with the detonating composition. The safety fuse is then secured in position by indenting the detonator tube, this process being known as crimping. The combination of safety fuse and plain detonator is called a capped fuse.
Industry:Mining
A detonator in which there is no designed delay period between the passage of an electric current through the detonator and its explosion.
Industry:Mining
A detonator or detonating cord used to start detonation or deflagration in an explosive material; can refer to a blasting cap or primer.
Industry:Mining
A detonator requiring a minimum current of 1 A for firing and having a resistance of about 1 Omega .
Industry:Mining
A detonator requiring electrical energy to activate the explosive train, detonating the base charge.
Industry:Mining
A detonator which is initiated by a safety fuse; also referred to as an ordinary blasting cap.
Industry:Mining
