Metalliferous Mines Regulations, 1961 - Directorate General of ...

(3) When two working places belowground have approached within three metres
of each other, the blaster shall not fire any shot in any one of the said workings unless all
persons have been withdrawn from the other working place and the same has been so
fenced off as to prevent persons inadvertently coming in direct line of the shot.
(4) In any mine to which regulation 142 appliles, the following provisions shall
have effect, namely :-
(a) Notwithstanding anything contained in the regulations, no shot shall be
stemmed or fired by any person who does not hold either a Manager’s
Certificate, or Foreman’s or Mate’s Certificate together with a Gas-testing
Certificate.
(b) Where more shots than one are charged for firing, the shots shall be fired
simultaneously. No delay-action detonator shall be used, except with the
previous permission in writing of the Chief Inspector and subject to such
conditions as he may specify therein.
(c) If in ventilating district, presence of inflammable gas is detected in any
place, no shothole shall be charged, stemmed or fired in that place or in
any other place situated on its return side till such place has been cleared
of gas and declared safe.
(d) Immediately before charging a shothole or a round of shotholes, and again
before firing the shots, the blaster shall carefully test for inflammable gas
at all places within a radius of 20 metres of the place of firing.
166. Inspections after shotfiring. – (1) After4 a shot has been fired, no person other than
the blaster or any other competent person holding a Manger’s or Foreman’s Certificate
appointed for the purpose by the Manager shall enter, or allow any other person to enter,
the place until the area is free from dust, smoke or fumes. The blaster or other competent
person shall, before any other person enters the place, make a careful examination and
with his assistants, if any, make the place safe. No other person shall enter the place and
where guards have been posted, they shall not be withdrawn until the examination has
been made and the place has been declared to be safe in all respect. In the case of
opencast workings, after shots have been fired, an all clear signal shall be given except in
the case of a misfire.
(2) After shots have been fired, all persons engaged in clearing mineral, rock or
debris shall look for unexploded cartridges and detonators. If such a cartridge and
detonator is found, it shall be removed and shall as soon as possible be handed over to a
blaster or other official.
167. Misfires. – (1) The number of shots which explode shall, unless shots are fired
electrically or by means of an igniter cord, be counted by the blaster and another
competent person authorized for the purpose; and unless it is certain that all the shots
have been exploded, no person shall re-enter or be permitted to re-enter the place until 30
minutes after the firing of shots :