The employer shall ensure at a construction site of a building or other construction work that,—
(a) where there is a danger of falling or sliding of material from the roof face or wall of a tunnel, adequate measures such as shoring, supporting by means of rock bolts, segments of steel Section 40 (2) (q) Section 40 (2) (q) Section 40 (2) (q) Section 40 (2) (q) 58 sets and lagging between the rock and the supports called ‘ribbing’ are installed for the safety of the building workers;
(b) the excavated areas are made safe by use of suitably designed and installed steel sets, rock bolts or similar other safe means, wherever required;
(c) the responsible person referred to in rule 91, examines and inspects the workplaces in a tunnel before the commencement of work in such tunnel, and at regular intervals thereafter, to ensure safety of the building workers in such tunnel;
(d) the portal areas of a tunnel with loose soil, or rock, likely to cause injury to a person, are adequately protected with supports like steel ribbing, lagging and concreting; and
(e) while blasting in tunnels, the fumes of gases and dust, shall be removed by exhaust equipment and the entry of building workers shall only be allowed, when all such things are cleared.