10. Any occupation involving—
(a)work underground in any mine in which one of the objects of the mining operations is the getting of any mineral;
(b)the working or handling above ground at any coal or tin mine of any minerals extracted therefrom, or any operation incidental thereto;
(c)the trimming of coal in any ship, barge, or lighter, or in any dock or harbour or at any wharf or quay;
(d)the sawing, splitting or dressing of slate, or any operation incidental thereto.