shaft means an excavation having a longitudinal axis at an angle greater than forty-five degree from the horizontal—
shaft means an opening made for mining minerals, for hoisting and lowering persons or material, or for ventilating underground workings.
shaft means a vertical or inclined way or opening leading from the surface to workings below ground or from one part of the workings below ground to another and includes an incline;
More Definitions of shaft
shaft means a way or opening leading from the surface to workings below ground or from one part of the workings below ground to another, in which a cage or other means of conveyance can travel freely suspended, with or without the use of guides;
shaft means a vertical opening through the strata that is used in connection with the mining of coal, for the purpose of ventilation or drainage, or for hoisting men, coal, or materials;
shaft means a vertical or inclined opening that leads to an underground work area and is excavated below ground level. (« puits d’accès »)
shaft means a vertical opening through the strata that is or may be used for the purpose of ventilation or drainage, or for hoisting men or material, or both, in connection with the mining of coal.
shaft means a vertical opening through the strata that is or may be used for ventilation, drainage, or hoisting workers or material or both in connection with the mining of coal or other minerals or materials.
shaft means a shaft the top of which is, or is intended to be, at the surface; “staple-pit” includes winze;
shaft means any opening extending downwards from the surface or from a location underground and having an inclination to the horizontal of more than 15 degrees and is used for the purposes of raising or lowering persons or materials or for the intake or outlet of ventilation;