Inundation in Mines

1. In working of a water logged area the gallery should not be more than?

2. The holes drilled at different angles into sides while approaching a water logged area is?

3. No working should be done within a distance of ..... from the water logged area or abandoned mine or disused workings?

4. The length of the bore hole should not be less than .... while working near waterlogged workings?

5. The thickness and height of the temporary dam?

6. The thickness of the permanent water dam is?

7. A stone dust barrier may fail to arrest an explosion if there is a .... in the roof of the roadway over the barrier?

8. Tuberculosis is caused due to ?

9. The electric cap lamp is?

10. VOLSAFE boring apparatus can drill holes up to ..... depth?

11. Automatic detectors give either audio or visual alarm when the % of inflammable gas exceeds?

12. The flame of a flame safety lamp while testing for CH4 spires or jumps at the ?

13. The interval of boreholes should not be more than .... while working near waterlogged workings?

14. Spraying the surface with a liquid cement sand mixture (1:3) in dealing with fire is known as?

15. When approaching within 60 m from the probable old working place the boreholes should be driven at least?

16. While approaching a water logged area with safety boring apparatus an emergency shutoff door shall be built away from the site of the boring machine at a distance of?

17. The method of dealing with fire in a mine where heating is in the initial stages and its exact location is known is?