FIELD: blasting operations.
SUBSTANCE: method involves drilling of blast holes, their loading, arrangement on the surface of projection of two-layer cover in the form of a mat consisting of worn-out automobile tyres connected to each other and laid on metal mesh; blasting of mine rocks with borehole charges. Tyres of the cover are laid only on heads of blast holes located at least in four rows, and blasting of the block is performed using a row-by-row scheme of short-delay blasting in direction from projection slope.
EFFECT: easier erection; higher safety.
4 dwg
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RU2314489C1 |
