(1)While blasting in hot strata, either in overburden or coal in opencast mines, the following precautionary measures shall be adopted:-(a)no explosive other than slurry and emulsion explosives sha1l be used; and(b)blasting shall be done with detonating fuse down the hole:(2)Temperature inside the blast holes shall be measured, before filling with water, and if the temperature exceeds 80°C in any hole, such hole shall not be charged and records of measurement of temperature in each hole shall be maintained in a bound paged boots.(3)All blast holes shall be kept filled with water and where any hole is traversed by cracks or fissures, such holes shall not be charged unless it is lined with a suitable fire resistant casing and the hole filled with water and in addition, bentonite shall be used for sealing any cracks at the bottom of the holes.(4)Detonating fuse shall not be laid on hot ground without taking suitable precautions which will prevent it from coming in contact with hot strata.(5)The charging and firing of the holes in any one round shall be completed expeditiously and in any case within two hours.(6)Blasting operations shall be carried out under the direct supervision of an assistant manager having experience of blasting in hot Strata.
