Manwinding

 At every shaft,other than a shaft in the course of being sunk,where a winding engine is used for the purpose of raising persons,the following provisions shall have effect,namely :                                                 (1) In respect of every part of the winding installation including pulleys or sheaves,cages,chains, distribution plates and detaching hooks,the following particular shall be recorded in a bound paged book kept for the purpose (a) Name of the manufacturer and the year of manufacture;(b) Specifications and dimensions;(c)Reference to every certificate supplied with the part;and (d)Any other detail that may be necessary or required by the Regional Inspector.                                                                                      All entries in the book shall be made and signed by the engineer or other competent person,and shall be counter signed and dated by the manager.                                                                                                                          (2)Whenever any part or article is replaced or any repaired part or article used in any winding installation,the fact of such replacement or repair  shall be recorded in the book kept under sub regulations (1).                                                                                                                                         (3) A single linked chain shall not be used, except for the short coupling chain attached to a cage or other means of conveyance.Such single linked chain shall be attached to the safety hook through a distribution plates or other approved appliances.                                                                               Where safety chain are  used,their length shall be such that if the king bolt breaks,the shock to the cage or other means of conveyance is as slight as possible.                                                                                                                                                    (4)Where drum clutches are provided,the following provisions shall have effect,namely  : the operating gear of the drum shall be provided with locking gear to prevent inadvertent withdrawal of the clutch. Every engine used for the lowering or raising of persons shall have suitable interlocking device so fitted that it is not Possible- (i) to un clutch any   drum unless breaks of such drum are applied;or (ii)    to release the brakes until the drum clutch is fully engaged and securely locked.                                         Unless the cage or other means of conveyance attached to the drum is resting at the bottom of the shaft,the drum shall not be clutched   unless the winding engine man has assured himself immediately beforehand that the break is fully applied.                                                                                                                                    (5) Except in the 'Koepe' system of winding,there shall be provided between the rope and the cage or other means of conveyance a detaching hook.The space between such detaching hook,measured from the centre of the hole for attaching it to the rope shackles,and the detaching bell or plate when the cage or other means of conveyance is at its normal position at the top of the shaft,shall be not less than1.8meters where a geared engine is used,and not less than3.6meters where a direct acting engine is used.                                                                                            (6)In every shaft the engine shall be fitted with an automatically recording speed indicator.                                                                                                                                   (7)In every shaft exceeding 100meter in depth,there shall be provided an effective automatic contrivance to prevent over speeding and over winding, hereinafter called the "Automatic Contrivance".The automatically contrivance shall prevent the descending cage from being landed at the pit bottom or other permanent landing at a speed exceeding 1.5meters per second and also control the movement of the ascending cage in such a manner as to prevent danger to persons riding therein.The Regional Inspector may,by an order in writing,specify the maximum speed of winding in any shaft.                                                             Test of every Automatically contrivance and every brake shall be made by the engineer or other competent person appointed for the purpose,in the following manner-(i)once at least I every seven days by raising each cage or other means of conveyance,in turn,to pass the last control points above the topmost landing;and(ii) once at least in every three months,by attempting to land the descending cage at excessive speed.For the purpose of this test.,the setting of the Automatic Contrivance may be altered  so that a pre determined point in the shaft is regarded as the landing.                     The  results of every such test shall be recorded in a bound paged book kept for the purpose and shall be signed and dated by the person making.Unless the Automatic Contrivance is in full and fixed engagement with the winding engine,it shall be fully engaged either automatically or by the winding engine man,whenever person are to be lowered or raised;and a proper automatic indicater to show that this has been done shall be provided in such a position as to be easily seen by the banksman.No person shall be allowed to enter any cage or other means of conveyance untill the indicator shows that the Automatic Contrivance has been fully engaged.                                                                                            (8) Except where an automatic contrivance is provided to prevent overwinding,a point shall be fixed and marked on the indicator of the engine in such a way as to show when the cage or other means of conveyance of the drums from the completion of the wind;and if such cage or other means of conveyance contains person,the winding engine man shall not,as soon as it has reached the point aforesaid raise it the remaining distance at a speed exceeding 1.2meters per second.                                                                                                                                             (9) Where the only means of egress in a mine is by apparatus worked by steam or electricity, precautions shall be taken to ensure that the two winding engine do not fail simultaneously and in particular,in the case of electric winding engines,the engines shall be capable of being connected to two separate power supplies.Unless the Chief Inspector by an order in writing otherwise directs,the provisions of this sub regulations shall be satisfied if an emergency winding gear is maintained.

Mining Engineering

Comments

Post a Comment

Mining Engineering

First-aid station

Image
First-aid  station is a place fixed by the manger for rendering first-aid to person injured.Every first-aid station is provided with equipment as prescribed in the Third schedule of mines Rules namely: a stretcher and two blanket,Sets of splints(1.4m,0.9m,0.3m,)and sufficient tringular bandages.First-aid boxes(or cupboards),one per150 person,containin sufficient supply of large and small dressings and burn dressings,sufficient supply of sterilised cotton and adhesive plaster,roller bandages,Dettol or other antiseptic solution,a tourniquet,scissors and safety pins,soap.                                                  First aid station shall be provided at the following places On surface:-                     At pit top/incline mouth.In workshop,screening plant and    ...
Read more

Audio visual alarm

Image
  When a truck or dumper backs up a person standing behind the vehicle may get crushed.To alert such a person truck/dumpers are provided with audio visual alarm.As soon as the vechile is put in reverse gear, a special horn starts blowing and the backlight flashes.It is a statutory requirements that truck,dumper or loader shall not be run unless the audio visual alarm is working.
Read more

MINE WORKING

Image
  Opencast working--In open cast working,the following precautions shall be observed,namely:                                          In alluvial soil,morum,gravel,clay,debris or other similar ground-;*the side shall be sloped at an angle of sefty not exceeding 45degree from the horizontal or such other angle as the regional inspector may permit by an order in writing are subject to such conditions as he may specify therein;or the side shall be kept benched and the hight of any bench shall not exceed 1.5meter and the breadth thereof shall not be less than the height:।       Provide that the regional inspector may,be an order in writing and subject to such conditions as he may specify therein, exempt form the operation of his clause any working in the case of which special difficult exist,which in his opinion make compily with the provisions their ...
Read more