MininG EngineeR

CAGE SUSPENSION GEAR ARRANGEMENTS WHAT IS CAGE SUSPENSION GEAR ARRANGEMENTS IN MINES? The attachment used to attach the rope with cage is known as cage suspension gear. It consist of a rope capel which is attached to the one end of the rope & its another end is attached to the safety hook through ‘D’ link. The another end of the safety hook is attached to a triangular plate to a ‘D’ link & bull chain. And then at last The triangular plate is attached by the cage chains or Bridle chain. ROPE CAPEL Are widely used for connecting the winding rope to the suspension gear. The use of rope Capel is a basic requirement of safety in winding.  D-LINK These are used to attach any two components of cage suspension gear & to adjust the height of cage suspension gear. The diameter of the link rod should be 1.5 times the rope’s dia. & should not be any join in the link. SAFETY HOOK It is a safety device which...

DRUM WINDING There are four different shapes of Drum used in India these are A)Cylindrical Drum. B)Conical Drum. C)Cylindro-conical Drum. D)By-Cylindro-conical Drum. CYLINDRICAL DRUM A Cylindrical or parallel drum is a simple and robust in construction. The winding ropes are attached at the end of the drum barrel, and arrange to coil on the drum in the opposite direction, so that when the drum rotates one cage will be raised and other lowered. The rope coiling underneath the drum is called  under lap. The rope coiling over the top of the drum is the   overlap. It may be either grooved or plain. Its serious drawback is that,  it can be used for shallow shaft only. In winding from deep shaft, the weight of one winding  rope will exceed the weight of the coal raised per wind. Thus there will an excessive load on engine when starting and negative loads towards the end of the wind causing heavy brake wear. This unbalanci...

HEADGEAR STRUCTURE HEADGEAR STRUCTURE It is a steel or concrete frame work on the shaft mouth. The headgear consists of nearly, vertical columns which is two front legs columns, two main leg columns  & two back legs columns. Which is inclined at 1 in 8 to 1 in 10. towards the winding engine room. The vertical and inclined legs are joined by horizontal girder. The top of the headgear has a steel platform, or plate & the bush bearing of the winding pulleys, rest on the vertical numbers of headgear frame. Above the banking level, there is a detaching plate or detaching bell which is fixed in the headgear structure. This detaching plate is fixed at the height of length of cage + length of cage suspension gear + 3 to 7 m.  This margin of 3 to 7 meter allows a cage to be lifted for materials, to be slung, beneath it. Above the Detaching plate there is a headgear pulley which is fixed at the top of the structure and the winding rope is passed ov...