MINING METHOD

* Flame trap or flame arrestor is used with                (1) Conveyor   (2)direct haulage  (3)diesel locomotive  (4)shaker conveyor.                                                                                                                     * The flame trap of diesel locomotive is liable to choke up due to                                                            (1)dust in air (2)impure engine oil  (3)narrow aperture of plates (4)poor filter         ...

 * Which of the following belong to hard rock mining?                                                                          (1)Potash. (2)Salt. (3)trina. (4)iron.                                                                                                   * Gravimetric dust sampler is;                              (1) intrinsically safe apparatus. (2)FLP,(3)It has both the features, (4)none of the above.                    ...

No person shall be allowed to rush to rescue the man, because he may also fall unconscious.    The Overman along with two workers of strong physique shall don self rescures and bring out the victim to fresh air.   Simultaneously arrangements shall be made to fetch stretcher and first aid box.A responsible man shall be put to infrom the manager of the mine over phone regarding the incident and to send for the rescue team.As soon as victim is brought to fresh air,artficial respiration shall be applied and continued until he recovers.If the victim has difficult recovering, resuscitation apparatus brought by the rescue team shall be put to use. Victim shall be transported to surface for medical aid.A repot of the accident shall be written at the end of shift.  

  Timber supports are heavy,bulky,costly,time consuming of short life and indefinite strength and use of timber has in volved cutting trees.Therefore they have been replaced by steel supports to a large extent.They are still used in many situations for example -Cogs at goaf edges and junctions.Two cross bars on cogs at roof ledges.Vertical props with lagging at pillar side having tendency to spall. Inclined stay props to support overhangs.Support of faults slips break in roof by cogs on either side with cross bars across them.Supports of isolated spots in roadways by props,cross bars or cogs as required.As temporary supperts.                                                                     

Haulroad: Type of haulroad has a profound influence on operation of the mine,it is life line of an open cast mine.                                                                                                                                  Benefits of a good haulroad: (a)High production because of increased dumper speed.       (b)Better safety.     (C) Reduction in maintenance and less machine breakdowns.    (D) Saving in diesel,tyres,spares. (E)Lesser operator fatigue,high morale.                                        ...