Study of efficiency and productivity growth in opencast

in opencast and underground coal mining in India: a DEA analysis Mudit Kulshreshtha,Jyoti K. Parikh Indira Gandhi Institute of De elopment Research, Gen.A.K. Vaidya Marg, Goregaon East ,() Mumbai 400065, India Abstract This paper attempts to study efficiency and productivity of coal mining in the Indian coal sector using detailed input and output data for underground and opencast coal mining

Opencut Mining or Underground Mining Which Is Better?

21/10/2017 It represents 60 percent of global coal production. Besides coal, underground can be used to mine gold or copper. In underground mining, there are two methods: bord-and-pillar and longwall. Bord-and-pillar. Bord-and-pillar is the oldest mining method. A grid of tunnels is created in the areas of mineral content. The process chips away at the panels into the coal seam. Pillars of coal are left

Study of efficiency and productivity growth in opencast

Kulshreshtha and Parikh (2002) used DEA to assess productivity growth in opencast and underground coal mining in India between 1985 and 1997 and find a decline in productivity over the years. Das

Productivity Improvement in Underground Coal Mines A

1/1/2013 The gloomy scenario of coal production along with the likely exhaustion of shallow depth coal reserves and problems faced regarding surface land acquisition for opencast mining have warranted a quantum jump in coal production and productivity from underground mines in India. Moreover, while opencast mining has seen major advancements, underground mining has remained sluggish for the

how to decide coal opencast vs underground

how to decide coal opencast vs underground interim report on the history of the westfield opencasr site near Sep 12, 2013 Opencast Coal Industry next week Lai XP ! Basics of an open pit mine Mine Engineer.Com. The definition of a open pit mine is "an excavation or cut made at In a open pit coal and process wastes; sources include the underground and Lai XP ! Mining

Coal mining Choosing a mining method Britannica

Coal mining Coal mining Choosing a mining method: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting a coal seam depends on many technological, economic

Opencast Mining an overview ScienceDirect Topics

Coal is mined either by surface methods (open-cut or open-cast mining) or by underground techniques. In surface mining, all of the rock from the ground surface to the top of the seam (material referred to as overburden) is removed and set aside to expose the coal, which is then taken out and transported from the mine for preparation and use ( Figure 11 ).

MODEL TERMS OF REFERENCE (TOR) (GUIDELINES) FOR

TOR FOR OPENCAST COAL MINES AND UNDERGROUND COAL MINES OF M/s COAL INDIA LTD. (CIL) The following is a Model TOR (guideline) for preparation of TOR for coal mines (OC and UG) of M/s Coal India Ltd., which have not obtained an EC and are in violation of the EIA Notification 1994 and 2006. The status of violation is determined comparing present status (of lease area/production/both)

Blasting Techniques Used in Underground and Opencast

In underground coal mine the yield of coal on an undercut face is nearly 5-8 te per kg of explosive and 1-2.5 te per detonator but with solid blasting the figures are 1.8 to 2.7 te per kg of explosive and 0.8 to 1.35 te per detonator.

Underground mining (hard rock) Wikipedia

Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques for excavating ores of gems such as diamonds or rubies. Soft rock mining refers to excavation of softer minerals such as salt, coal

Opencut Mining or Underground Mining Which Is

21/10/2017 It represents 60 percent of global coal production. Besides coal, underground can be used to mine gold or copper. In underground mining, there are two methods: bord-and-pillar and longwall. Bord-and-pillar. Bord-and-pillar is the oldest mining method. A grid of tunnels is created in the areas of mineral content. The process chips away at the panels into the coal seam. Pillars of coal are left

Study of efficiency and productivity growth in opencast

Kulshreshtha and Parikh (2002) used DEA to assess productivity growth in opencast and underground coal mining in India between 1985 and 1997 and find a decline in productivity over the years. Das

how to decide coal opencast vs underground

how to decide coal opencast vs underground interim report on the history of the westfield opencasr site near Sep 12, 2013 Opencast Coal Industry next week Lai XP ! Basics of an open pit mine Mine Engineer.Com. The definition of a open pit mine is "an excavation or cut made at In a open pit coal and process wastes; sources include the underground and Lai XP ! Mining

Opencast Mining an overview ScienceDirect Topics

Coal is mined either by surface methods (open-cut or open-cast mining) or by underground techniques. In surface mining, all of the rock from the ground surface to the top of the seam (material referred to as overburden) is removed and set aside to expose the coal, which is then taken out and transported from the mine for preparation and use ( Figure 11 ).

MITIGATING ENVIRONMENTAL AND SOCIAL IMPACTS OF COAL

Consequences of Coal Mining in India’ during November 19-21, 2007 at New Delhi. Opencast coal mining is more severe an air pollution problem in comparison to underground coal mining. In underground coal mining men suffer from coal dust inside underground mine workings. But opencast mining create much more air quality deterioration in respect of dust and gaseous pollutants. It creates

Recent Advances in Rock Engineering (RARE 2016) Rib

In India, more than 80 % share of coal production comes from opencast mines while the share from underground (u/g) mine is abysmal low[1]. The trend has been similar for past decades (Figs. 1-2). On the other hand, around 70% of total coal reserve now available is amenable for extraction by underground coal mining methods[2].The Government of India (GoI) has an ambitious vision of 1

Coal Mining Vs. Metalliferous Mining copper mining

Underground mining of coal is much simpler. After the vertical shaft touches a coal seam, the roads can be made in the coal seam itself (in the seam mining) producing coal in the process of drivage of roads. Hardly any roads or excavation is required in the roof or floor or stone of the coal seam as in our country, coal seams less than 1.5 m

Underground mining (hard rock) Wikipedia

Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques for excavating ores of gems such as diamonds or rubies. Soft rock mining refers to excavation of softer minerals such as salt, coal

CIL: Coal India to outsource underground operations

3/6/2020 Coal India’s existing underground mines employ 44% of its workforce but account for only 5% of the output. It has 166 such mines out of a total of 360. Company executives say most of these mines came to the company after nationalisation. They produce better quality coal but costs are higher. Coal India has firmed up plans to offer underground coal blocks to global mine developer and

Coal India to outsource underground operations, will

Coal India has decided to outsource underground mine development and operations, company executives said. A company spokesperson said Coal India subsidiary, Central Mine Planning & Design Institute (CMPDIL), will soon invite tenders for appointing such operators for two new underground mines that aim to produce at least 5 million tonnes a year each.