| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Heading blast | Mining | A method of quarry blasting in which the explosive is confined in small tunnel chambers inside the quarry face. The charges are placed at suitable intervals according to the burden to be blasted. In large blasts, several tunnels and cross tunnels may be employed. See also: chamber. Syn: tunnel blast. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
