142. It is prohibited to install an internal combustion engine, an apparatus under pressure, a combustion heating apparatus, a repair workshop, a warehouse or have an office in a building covering a surface opening of an underground mine. This prohibition does not apply to:(1) a building that is an integral part of a building covering the opening, subject to section 145;
(2) the grinding of drill bits when sinking a shaft;
(3) the storage of wood required for shaft sinking work where the wood is placed to thaw in the building covering the shaft;
(4) the heating systems provided for in sections 87 and 142.1.