(57) A method of detaching a monolith from rock massif, consisting in that, depending
on length and volume of the monolith (1) to be detached from rock massif (2) or concrete
block (1) to be split, shot holes (3) are drilled in such massif or block with identical
diameter d = 25-75 mm, identical distance between holes c = 10-25 cm, identical distance
e = 10-15 cm of the outermost holes (4) from the edges (5 and 6) of the main massif
(2) and identical distance k = 10-20 cm from lower plane (7) of the monolith (1) to
be detached. Next, depending on the diameter (d) and number of holes (3), prepared
is the same number of identical gas-generating devices (8) having casings, made preferably
of polyethylene, adapted to diameter and height of the holes and equipped with initiating
device (11) provided with pyrotechnic igniter (16) equipped with electric wires (17)
that is surrounded with binary mixture (12) containing 88-105 parts by weight of sodium
chlorate (NaClO3) and 0.8-1.5 parts by weight of iron oxide, functioning as a catalyst of burning.
Further, 7.8-13.5 parts by weight of fuel oil (19) for diesel engines is injected
into the mixture by means of any commonly known method and the so prepared and tightly
closed gas-generating devices (8') are placed, depending on height (H) of the shot
holes (3), in at least one row on bottoms of the holes in such a way that their electric
wires (17) protrude above the surface of the monolith to be detached, and further
the commonly known operations are performed related to sealing the holes by means
of clay, sand, or their mixture and igniting said ternary mixture initiated by initiating
devices (11) and generating heat and gas with pressure amounting to 95-105 MPa resulting
in detachment of monolith (1) from rock massif (2) or avalanche massif or splitting
a concrete block (1).
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