7 Questions
What is the maximum angle of safety allowed for sloping the sides in opencast workings in alluvial soil?
45 degrees
If the sides in alluvial soil are not sloped, what alternative method can be used?
Benched sides
What is the maximum height allowed for a pillar left 'in situ' for measurement purposes?
2.5 metres
When working with a 'float' deposit on a sloping face, what should be the maximum angle from the horizontal for the sides?
60 degrees
Under what conditions can the Regional Inspector exempt an opencast working from following certain provisions?
If special difficulties exist
What is the minimum base diameter allowed if a pillar height exceeds 1.25 metres?
1.6 metres
What is the maximum height allowed for any bench in alluvial soil according to the regulations?
1.5 metres
Study Notes
- Precautions to be observed in opencast workings include sloping the sides at an angle of safety not exceeding 45 degrees or as permitted by the Regional Inspector.
- In certain ground types, sides can be benched with specific height and breadth restrictions to ensure safety.
- Regional Inspector can exempt specific workings from these requirements if special difficulties exist.
- Pillars left 'in situ' for measurement should not exceed certain height and base diameter limits.
- When working on a sloping face with manual means, benches should be used and sides should be sloped at an angle not exceeding 60 degrees.
Test your knowledge on the precautions to be observed in opencast workings, as per regulations 106-118. This quiz covers safety measures related to sloping angles, regional inspector permissions, and other important guidelines.
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