| 摘要 |
Method for formation of cut cavity at penetration of horizontal mine working, for instance drill drift that is constructed on drill horizon in production block in which due to blasting charges of three-level cylindrical cut with delay, beginning from charges of cumulative effect of third level to compensation cavity formed in central part of the working, in zone of effect of three-dimensional heat field, with re-distribution of static stresses in direction of working penetration increase of depth and volume of coal cut working is achieved. The method makes it possible to increase effectiveness and shape of charge of explosive substance and to increase rate of working penetration. |
