MINING METHOD

When the owner agent or manager intends or proposes,by introducing water from the surface or from any other part of the mine,or from an adjacent mine,to flood any part of the working of his mine,he shall give,in writing not less than 14days notice of such intention or proposal to the chif inspector and the regional inspector and to the management of all adjoining mines and of such other mine as might by such flooding.Provide further that the regional inspector may by an order in writing,either prohibited any such operation or require that such operation shall not be commenced untill such precautions,as he may specify,have been taken to his satisfaction.

  BLAST HOLE DRILL:                                                                               Roller bit drill cuttings are flushed out by compressed air is known as blast hole drill.In our country 150,260and310mm dia.electric blast hole drills are commonly used in opencast mines.Blast hole drill are crawler mounted.By adding drill rods one after another deep holes can be drilled.For dragline benches 40m or even longer holes are required.Feed mechanism of the drill is by hydraulic pumps.Drill rood is fitted in a long mast.For adding drill rods or for bit changing rod changer or carousel of the machine is used.Rod length is generally 10-12m Depending on the model,the machine can drill holes of upto 3-5rods.Blast hole drills are equipped with 3hydraulic jack for leveling the m...

Overman's report book is generally a printed book.It is a bound book and the pages are serially number. After filling up details like name of mine,seam,district, date/time of inspection and parts visited,he write a report on the following topics (A to M).                                          A  .Saftey material:- supply made during the shift and whether the stock u.g.is adequate. Material required.                      B. ventilation appliances:-condition,any deficiency,Any stopping,brattice,or air pipe lagging behind(give particularly),Any  re circulation of air by auxiliary fan, Deficiency in use of safety lamp by mining sirdar/shotfirers/other competent person,%of inflammable gas detected,name of face,action taken.              C. Haulage:Saftey divices and appl...

The  Board shall consist of the Chif Inspector who shall be it's chairman ex-officio and five members prossessing tecnical qualification in mining and having practical experience in coal mines,or serving in an institution imparting education in mining engineering at the degree or equivalent level and engaged in mining research.Present all important papers and matters to the Board as early as possible,isue orders for carrying out the divisions of the board have power to refer in his discretion any matter to the central Government for their order and have powers generally to take such action or pass such orders as are necessary to implement the desision of the Board.

  Highest flood level (HFL) When it rains water level of river or jore rises and water spreads on both sides.The rise varies from year to year.The highest level in known history to which water has risen is known as highest flood level or HFL of river/jore.The outer border to which the water spreads on either side is called highest flood line.If there is river or jore near the mine,HFL305m(5.10.2006).It gives an idea of the extent to which the water can spread so that Safety of mine entrance can be ensured.HFL is painted on a concrete pillar built on the surface.Every year durring rainy season the surveyor checks whether the water level has risen to a level higher than HFL,and if so,he surveys the HFL line,amends all mine plans accordingly and reveiws the dangers.It is to be noted that HFL line is not a contour line,In different mines on the same rivers,HFL may be different because width and depth of river may not be the same at all places.