91. Act shall not apply to any opencast mine engaged in the extraction of Kankar, gravel, ordinary clay, limestone where the depth of excavation measured from its highest to lowest point nowhere exceeding 'A' meters. 'A' is given by
92. The base that is established by the rescue team near to irrespirable zone for conducting rescue work is known as-
93. If any determination shows the percentage of inflammable gas to exceed . . . . . . . ., determinate shall be made or samples of air taken at intervals not exceeding . . . . . . . . hours. for so long as such content exceeds that percentage and for the seven next following days.
94. Conditions for use of ammonium nitrate fuel oil in a mine shall be specified by . . . . . . . . the in general order.
95. No person shall work or be permitted to work at any place having an inclination of . . . . . . . . degrees or more from the horizontal, where likely to slip or over balance unless is secured by a safety belt and life line or otherwise safeguard.
96. Where large number of shots have to be fired, shot firing shall, as far as practicable, be carried out between . . . . . . . .
97. Immediately after the end of shift, the shot firer shall return . . . . . . . . to the magazine.
98. In every degree I underground coal mine if the average output exceeds 'A' tonnes, the Manager shall be assisted by a Ventilation Officer. 'A' is given by,
99. The machinery shall be operated under the constant supervision of . . . . . . . .
100. Which are required to prevent an ignition or explosion from extending from one part of the mine to another . . . . . . . .
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