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Page 1: Appalachia Coal Mining-to Marketing Training Library/Research/Coal...Appalachia Coal Mining-to Marketing Training September 24, 2015 NETL Pittsburgh, PA 10/15/2015 1 National Energy

 

 

Appalachia Coal Mining-to Marketing Training

September 24, 2015

NETL Pittsburgh, PA

Page 2: Appalachia Coal Mining-to Marketing Training Library/Research/Coal...Appalachia Coal Mining-to Marketing Training September 24, 2015 NETL Pittsburgh, PA 10/15/2015 1 National Energy

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1

National Energy Technology Laboratory

Driving Innovation ♦ Delivering Results

Mike Mosser

Project ManagerU.S. Department of Energy

National Energy Technology Laboratory

U.S. Coal Mining Methods Deployed in 

the United States

2National Energy Technology Laboratory

Presentation Outline

• Statistics

• Coal Characteristics 

• Coal Mining Methods– Underground Mining 

– Surface Mining

• Coal Preparation

• Environmental– Reclamation

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3National Energy Technology Laboratory

Statistics – World Coal Reserves

• U.S. has the highest coal recoverable reserve – 237 billion tons 

– Enough for mining 200 ‐ 300 years

– Only the good seams are mined currently

• China has the third largest reserve – 115 billion short tons

– 50 more years

4National Energy Technology Laboratory

Statistics – World Coal Production

• China: No. 1 coal producer– 2002: 1,380 million tons

– 2004: 1,950 million tons

– 2013: 3,561 million tons

• U.S.: No. 2 coal producer– 2002: 998 million tons

– 2013: 904 million tons

• India: No. 3 coal Producer– 2002: 356 million tons

– 2013: 613 million tons

PR China 3561Mt Russia 347Mt

USA 904Mt South Africa 256Mt

India 613Mt Germany 191Mt

Indonesia 489Mt Poland 143Mt

Australia 459Mt Kazakhstan 120Mt

Top 10 Coal Producing Countries

World Coal Association

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5National Energy Technology Laboratory

Statistics – U.S. Coal Fields 

Average Heat Value• Anthracite    

12,700 BTU/lb

• Bituminous    13,100 BTU/lb

• Sub‐bituminous    9,500 BTU/lb

• Lignite    6,700 BTU/lb

usgs.gov

6National Energy Technology Laboratory

Coal Production in the U.S.

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7National Energy Technology Laboratory

Coal Power Sector Generation

8National Energy Technology Laboratory

Some General Facts

Surface Mining 67%

Underground Mining 33%

Longwall mining 50%

Continuous mining 45%

Conventional mining 4.5%

Others 0.5%

Coal Mining Methods (2013 by Annual Production)

Source:  energy information administration (EIA)

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9National Energy Technology Laboratory

Coal Mining Industry

• Main features of U.S. mines

– No or very few non‐production personnel at mine level (e.g., about 300 employees at Cumberland Mine producing 6.5 million tons clean coal/year)

– Mine life varies from several years to 30 years depending on the reserves and market forces

– Mine size varies from several thousand tons to 111 million tpy

– Common design tasks handled at corporate level

– Contractors are heavily used for special or difficult tasks

10National Energy Technology Laboratory

Coal Mining Industry

• Main challenges of the U.S. Coal Industry– Mine Safety is first priority  

– Ground control problems

• Roof falls, cutter roof, floor heaving

• Entry stability in deep mines (>500 m)

• Surface subsidence, especially in the east, mid west

• Longwall tail entry support 

– Environment limitations 

• Air and water pollution

• Permitting issues

• Environment groups

– Depletion of good coal and good geologic conditions

– Competition from gas industry

– Longwall mine production limited by ventilation capability

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11National Energy Technology Laboratory

Safety is Important Phase of Mining Methods

Raspadskaya Mine, Russia March 2010 – 66 killed

12National Energy Technology Laboratory

Coal Mining Methods

Uky.edu

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13National Energy Technology Laboratory

Underground Coal Mining Methods

• Room and pillar method

– Very flexible, good for mining small and irregular reserves

– Development mining only 

• Low recovery ratio, normally < 50 %

• Not intend to cause surface subsidence

– Development with pillar retrieving

• Pillars are partially recovered

• Higher recovery ratio

• Normally cause immediate surface subsidence

– Traditional (Drill, blast, load and haul operations) almost none now

– Continuous miner (Miner = cut and load, hauling remains to be only non‐continuous operation)

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15National Energy Technology Laboratory

Early Coal Mining Methods

16National Energy Technology Laboratory

Underground Coal Mining Methods

Traditional and Continuous Miner Room and Pillar Mining Methods

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17National Energy Technology Laboratory

Continuous Mining Machine

18National Energy Technology Laboratory

Underground Coal Mining Methods

Continuous Miner

Shuttle Car

Joy Manufacturing

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19National Energy Technology Laboratory

Underground Coal Mining Methods

Dual Boom Roof Bolter with TRS

Miner Bolter

Roof bolting operation could be the bottleneck for room and pillar mining operations 

20National Energy Technology Laboratory

Longwall Method Panel Layout

MAINS

BLEEDERS

SR

SR

SR

SR

SR

RR

RR

RR

RR

No. 3  Panel  

Direction of Mining  

No. 5  Panel  

RR B.P.

B.P.

B.P.

B.P.

B.P.

No. 4  Panel  

W

WP

H

T

L

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21National Energy Technology Laboratory

Underground Coal Mining Methods

A Longwall Face in a Coal Mine

A Double Drum Longwall Shearer 

22National Energy Technology Laboratory

Underground Coal Mining Methods

Longwall Shield

Battery HaulerMajor equipment for speedy longwall move

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23National Energy Technology Laboratory

Longwall Panel Development

• Primary support are roof bolts which are installed on cycle during development

23

24National Energy Technology Laboratory

Longwall Panel Development

• Roof bolting key to the success of high productive longwall mining

• About 100 million pieces of roof bolts consumed per year in U.S.– Mechanical bolts  40%

– Resin bolts 40%

– Specialty bolts. 20%

• Bolt length– Bolt length: 4 ft (1.2 m) ~ 16 ft (4.9 m)

– Max. bolt length < Mining height.

– If bolt length is longer than mining height, bolt notch or sectioned bolts (normally 4 ft 1) are used.

– Majority are 1.5–2.5 m long.

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25National Energy Technology Laboratory

Underground Coal Mining Methods

• Longwall Mining Method– All equipment becomes larger and more automated

• 40 inches (1.07 m) cutting web 

• 1,000‐ton shields

• Wider shield (5.5 ft or 1.68 m)

• 2‐leg shields

• 72 inches (1.83 m) belt conveyors, 6,000 tons/hour capacity

• Batch shield moving system (8–10 shield per one operation)

• Fewer workers in one crew (5–6 persons per shift)– 2 shearer operators– 1 shield operator– 1 headgate operator– 1 mechanic – 1 helper (optional)

26National Energy Technology Laboratory

Longwall Mines 2014

• No. of Longwall Mines – 42

• No. of Longwall Faces – 47

• Ave. U.S. Longwall mine produces 4.4 million tpy

• Ave. cutting height 91.4 inches

• Ave. Panel width – 1,228 ft.

• Ave. panel length – 12,117 ft.

• 17 walls operate in the Pittsburgh coal seam

• Max. overburden on average reaches 1,145 ft.

• Deepest longwall is 3,000 ft. overburden (West Ridge, Utah)

• Top 3 operators are Murray Energy, CONSOL Energy, and Foresight Energy

• State of WV has 13 faces, PA has 7, Illinois has 7 and Alabama has 5

• Highest horse power shear has 2,805 HP

• CONSOL Bailey and Enlow Fork produced 12.3 million tons of clean coal

Coalage.com

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27National Energy Technology Laboratory

Longwall Mines

• Daily advance rate– Range: 15–35 m/day

– Average: 23 m/day

• Daily production: 18,000 tons (4 million tons/year)

• Main reasons– Favorite conditions for longwall mining: inclination <5o, height most 

between 1.4 ~ 2.1 m

– Relatively shallow overburden: average about 240 m

– Low gassy mines

– Normally single seam mining

– Equipment automation

– Mixing of room & pillar and longwall mining methods:  Longwall in good areas and R & P in left‐over areas.

28National Energy Technology Laboratory

Mountaineer II Mine, WV – Mining Two Seams With Different Methods

FACE16

FACE14

FACE13

GATE17

GATE16

GATE15

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C ED A R G R OV E SH AF T

T O P EL E V. -105 0 ft .B O TT O M EL EV .-7 30 ft.DE PT H -32 0 f t.

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L W_ 2

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R OOMS_ 8

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R OOMS_1 4ROO MS_15ROOM S_16RO OMS_17

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ROOMS _7ROOMS _7ROOMS _7ROOMS _7ROOMS _7ROOMS _7ROOMS _7ROOMS _7

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ROO M S_ 38

RO O M S_ 39

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P A N E L_ 25

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P A N EL _ 28

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#1 M

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23

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PANE

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PANEL 135PANEL 134

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ALMA SEAM CEDAR GROVE SEAM

PLANT SITE

MINE PORTAL

PLANT SITE

MINE PORTAL

N N

LEA

SE

LINE

LEASE LINE

LEASE LINE

LEASE LINE

LE

AS

E LIN

E

LEASE LINE

Lower Seam mined with Longwall method 11 m above Alma seam, R&P method used

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29National Energy Technology Laboratory

Surface Mining

• Coal surface mining methods

– 67% of the coal production

– Mining methods

• Open‐pit

• Area Mining

• Contour mining

• Mountain top removal mining

• Highwall Mining

30National Energy Technology Laboratory

Surface Mining – Coal

Cast

Dozer

Dragline

Cast Profile

Dragline

Dozer

Cast

Spoil

Coal

Overburden

Pre-Bench

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31National Energy Technology Laboratory

Surface Mining Equipment

Typical Equipment Used for Overburden Removal

32National Energy Technology Laboratory

Surface Mining

MaximumCapacity(tons)

360 ton

340 ton

260 ton240 ton

190 ton170 ton

400 ton

1985 1990 1995 2000

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33National Energy Technology Laboratory

Surface Mining

• Some trends in surface mining

– Digital drives on shovels and draglines

– Larger trucks

– Global positioning systems

• Driverless trucks

• Collision avoid radar for large mobile equipment

– High voltage equipment

34National Energy Technology Laboratory

Area Mining ‐ Peabody Coal CompanyPRB Coal in Gillette, Wyoming

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35National Energy Technology Laboratory

Mountain Top Mining

Mountaintop removal mining (MTR), also known as mountaintop mining (MTM), is a form of surface mining that involves the mining of the summit or summit ridge of a mountain. Coal seams are extracted from a mountain by removing the land, or overburden, above the seams.

Mining in Process

36National Energy Technology Laboratory

Mountain Top Mining

Restoration in Process

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37National Energy Technology Laboratory

Highwall Mining

Coalcountrythemovie.com

38National Energy Technology Laboratory

Coal Preparation

Modern coal processing plants incorporate a complex array of solid‐solid and solid liquid separation processes. 

• The processes remove unwanted impurities such as ash, sulfur, and moisture from run‐of‐mine (that is, unprocessed coal) feedstocks to improve coal utilization properties. 

• Separation technologies used by the coal industry include screening, classification, dense medium separation, gravity concentration, froth flotation, centrifugation, filtration, and thickening.

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39National Energy Technology Laboratory

Prep Plant Statistics 

• Operators

– ANR – 33 plants

– Patriot Coal – 16 plants 

– Murray Energy – 15 plants

– Blackhawk Mining – 14 plants

– Arch and Alliance – 12 plants 

• No. of U.S. Coal Prep. Plants – 268

– 19% reported as idle

– WV 80, KY 56, PA 44, VA 18, IL 16 and IN 14

40National Energy Technology Laboratory

Coal Preparation – Separation Processes Used for Coal

SieveBends

Dense MediaCyclone

BasketCentrifuges

Dense Media Vessel

DewateringScreens

Raw CoalScreens

Coal Spirals Screen‐BowlCentrifuges

ClassifyingCyclones

Med

ium

Solid‐Solid Solid‐LiquidSize‐Size

Coarse

Fine

Ultrafine Froth 

FlotationDisc Filter

Increasing Difficulties

VT.edu

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41National Energy Technology Laboratory

Coal Preparation – Images

42National Energy Technology Laboratory

Environment and Reclamation

Returning the land to as good or better condition than before mining

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43National Energy Technology Laboratory

Mining ReclamationMining is Temporary Land Use

Mylan Park Twisted Gun Golf Course

Mount Olive Prison Logan WV.  Airport

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National Energy Technology Laboratory

Driving Innovation ♦ Delivering Results

Perry Bissell

September 24, 2015

Appalachia Coal Markets

2National Energy Technology Laboratory

Presentation Outline

• Overview of Appalachia Coal Markets and Infrastructure

• Reasons for Decline in Appalachia Coal Markets

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3National Energy Technology Laboratory

Quick C.V.

• PhD, Mineral Economics, Penn State

• Director, Market Development and Analysis, CONSOL Energy

• Senior Energy Market Analyst, John T. Boyd Company

• Senior Director, Coal, PIRA Energy Group

4National Energy Technology Laboratory

U.S. Coal Producing Regions

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5National Energy Technology Laboratory

Appalachia Coal Quality v. Other Major Basins

Heat Content (Btu/lb) SO2 Content (lbs/MMBtu)

Basin Low High Low High

Central Appalachia 11,500 13,000 1.2  3.0 

Northern Appalachia 11,500 13,000 2.5  7.0 

Illinois Basin 10,000 12,500 4.0  6.5 

Powder River Basin  8,300 8,800 0.7  1.0 

Quality estimates are for illustrative purposes and represent "typical" low and high values. These are not intended to 

represent lowest and highest potential quality.

6National Energy Technology Laboratory

Central Appalachia Mines and Preparation Plants

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7National Energy Technology Laboratory

Northern Appalachia Mines and Preparation Plants

8National Energy Technology Laboratory

Appalachia Coal Production,1990‐2014

Source: Ventyx Energy Velocity

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9National Energy Technology Laboratory

Central and Northern Appalachia Coal Production, 1990‐2014

Source: Ventyx Energy Velocity

10National Energy Technology Laboratory

Central Appalachia Coal Production by Mine Type, 1990‐2014

Source: Ventyx Energy Velocity

0

50

100

150

200

250

1990 1993 1996 1999 2002 2005 2008 2011 2014

To

ns

of

Co

al i

n M

illi

on

s

SMineType:

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11National Energy Technology Laboratory

Central Appalachia Coal Employees,1990‐2014

0

10000

20000

30000

40000

50000

60000

1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014

To

tal N

um

ber

of

Em

plo

yees

Source: Ventyx Energy Velocity

12National Energy Technology Laboratory

Central Appalachia Coal Mine Labor Productivity, 1990‐2014

Source: Ventyx Energy Velocity

0

5

10

15

20

25

30

35

1990 1993 1996 1999 2002 2005 2008 2011 2014

To

ns

per

Man

Day

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13National Energy Technology Laboratory

Summary Data for Central Appalachia, 1990 and 2010

Sources: Ventyx Energy Velocity

Metric 1990 2010 2014

Production (Million Tons) 291  185  117 

Number of Mines 1,837  736  490 

Employment (Average Number of Employees 55,359 34,503 24,005

Productivity (Tons per Man Day) 20.15  17.77  16.83 

14National Energy Technology Laboratory

Power Plants Receiving Appalachia Coal, 2014

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15National Energy Technology Laboratory

U.S. Electricity Generation by Fuel, All Sectors, 2004‐2014

Source: EIA Short Term Energy Outlook, August 2015

17.9% 18.8% 20.1% 21.6% 21.4% 23.3% 23.9% 24.8% 30.4% 27.8%27.5%

49.8% 49.6% 49.0% 48.5% 48.2% 44.4% 44.8% 42.2% 37.5% 39.0% 38.8%

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014

Th

ou

san

d M

egaw

atth

ou

rs P

er D

ay

Coal

Natural Gas

Petroleum

Nuclear

Power

Renewable Energy

Other Sources

Note: Labels show percentage share of total generation provided by coal and natural gas.

Sectors:

16National Energy Technology Laboratory

Monthly Share of Total Power Generation by Fuel (Percentage of Total Generation)

0

0.1

0.2

0.3

0.4

0.5

0.6

1990 January

1990 September

1991 M

ay

1992 January

1992 September

1993 M

ay

1994 January

1994 September

1995 M

ay

1996 January

1996 September

1997 M

ay

1998 January

1998 September

1999 M

ay

2000 January

2000 September

2001 M

ay

2002 January

2002 September

2003 M

ay

2004 January

2004 September

2005 M

ay

2006 January

2006 September

2007 M

ay

2008 January

2008 September

2009 M

ay

2010 January

2010 September

2011 M

ay

2012  January

2012 September

2013 M

ay

2014 January

2014 September

2015 M

ay

Coal Gas

Source: Energy Information Administration, August 2015 Monthly Energy Review, Table 7.2a_Electricity_Net_Generation_Total_ All_Sectors.xls

In April 2015, U.S. generation of electricity from natural gas exceeded coal‐fired generation for the first time since the start of EIA's monthly generation data in 1973. 

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17National Energy Technology Laboratory

U.S. Electric Power Sector Coal Consumption, 1990‐2014

Source: Energy Information Administration

0

200

400

600

800

1,000

1,200

Million Tons

18National Energy Technology Laboratory

U.S. Coal Exports by Coal Type, 2002‐2014

Source: EIA, Historical Coal Exports, Data from: Quarterly Coal Reports 2002 through Q1 2015 http://www.eia.gov/coal/data.cfm#imports

0

10

20

30

40

50

60

70

80

2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014

To

ns

of

Co

al i

n M

illi

on

s

Metallurgical

Steam

Coal Type:

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19National Energy Technology Laboratory

Central Appalachia Coal Prices, 2004‐YTD

Source: EIA: NYMEX Central Appalachian Coal Futures Near‐Month Contract Final Settlement Price History  

$0

$20

$40

$60

$80

$100

$120

$140

$160

To

tal C

oal

Pri

ces

20National Energy Technology Laboratory

Major Factors Behind Decline of Appalachia Coal

• Regional Competition

• Natural Gas

• Tightening Environmental and Safety Regulations

• Declining Export Markets

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21National Energy Technology Laboratory

U.S. Coal Production by Region,2009‐2014

Sources: Ventyx Energy Velocity, EIA Annual Energy Outlook 2012

22National Energy Technology Laboratory

Major Coal Basins – Win, Lose or Draw?

GRAPH of CAPP, NAPP, PRB, ILB, CO/UT production

0

100

200

300

400

500

600

1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014

To

ns

of

Co

al i

n M

illi

on

s

Central Appalachia

Illinois Basin

PRB

Northern Appalachia

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23National Energy Technology Laboratory

Costs of Central Appalachia Production

Source: Patriot Coal “Changes Underway in the Central Appalachia Coal Industry, July 14, 2014

WV coal producer: “You cannot mine CSX [12,500 Btu/lb] coal and sell it for $45/st. You can't.”, Platts Coal Trader, 8/24/15

24National Energy Technology Laboratory

Central Appalachia Production Cost Drivers

• Resource depletion

• Higher wages from prior labor shortages

• Mine safety and environmental regulations

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25National Energy Technology Laboratory

Henry Hub Natural Gas Spot Price (Dollars per Million Btu) 

Source: Energy Information Administration

0

2

4

6

8

10

12

14

16

Jan‐1997

Jul‐1997

Jan‐1998

Jul‐1998

Jan‐1999

Jul‐1999

Jan‐2000

Jul‐2000

Jan‐2001

Jul‐2001

Jan‐2002

Jul‐2002

Jan‐2003

Jul‐2003

Jan‐2004

Jul‐2004

Jan‐2005

Jul‐2005

Jan‐2006

Jul‐2006

Jan‐2007

Jul‐2007

Jan‐2008

Jul‐2008

Jan‐2009

Jul‐2009

Jan‐2010

Jul‐2010

Jan‐2011

Jul‐2011

Jan‐2012

Jul‐2012

Jan‐2013

Jul‐2013

Jan‐2014

Jul‐2014

Jan‐2015

Jul‐2015

26National Energy Technology Laboratory

Illustrative Examples of “Breakeven” Delivered Costs of Coal Versus Gas

Central Appalachia

Northern Appalachia Illinois Basin

Powder River Basin  Natural Gas

Fob Mine ($/Ton) $        70.00  $        60.00  $        50.00  $        15.00  na

Transportation ($/Ton) $        20.00  $        20.00  $        20.00  $        35.00  na 

Delivered Cost ($/Ton) $        90.00  $        80.00  $        70.00  $        50.00  na 

Delivered Cost ($/MMBtu) $          3.60  $          3.08  $          2.97  $          2.84  $       2.85 

Assumed Heat Content Btu/lb

Central Appalachia 12,500 

Northern Appalachia 13,000 

Illinois Basin 11,800 

Powder River Basin  8,800 

Source: LTI Estimates

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27National Energy Technology Laboratory

Central Appalachia Coal Exports

• Global markets have weakened

– Lower‐than‐expected Chinese coal imports

• Supply has increased

– Expanded production in Australia and Indonesia

• As the “swing supplier” in international coal markets, Central Appalachia exports have fallen dramatically

28National Energy Technology Laboratory

Growth in Chinese Coal Use is Slowing

Source: Energy Information Administration, Today in Energy, September 25, 2015

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29National Energy Technology Laboratory

Australia Coal Production

30National Energy Technology Laboratory

Tightening Environmental and Safety Regulations

• Environmental regulations have tightened on both producers and consumers of coal

– Power plant emissions

– MSHA safety regulations following 2010 UBB disaster

– Valley fill permitting

– Water treatment costs

• Prospects for additional tightening discourage investments

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31National Energy Technology Laboratory

Five Visuals Explaining Decline in Central Appalachia

0

10

20

30

40

50

Jan‐00

Nov‐00

Sep‐01

Jul‐02

May‐03

Mar‐04

Jan‐05

Nov‐05

Sep‐06

Jul‐07

May‐08

Mar‐09

Jan‐10

Nov‐10

Sep‐11

Jul‐12

May‐13

Mar‐14

Jan‐15

Antrim (MI, IN, & OH)Bakken (ND)Woodford (OK)Barnett (TX)Fayetteville (AR)Eagle Ford (TX)Haynesville (LA & TX)

Thin seams, tough mining compared to thick PRB seams and longwalls in other regions

Plant retirements in core marketsThe rise of shale gas

32National Energy Technology Laboratory

West Virginia Mine Entrance

Source: TechCorr, http://www.techcorr.com/news/Articles/Article.cfm?ID=388

Approximate Seam Height

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33National Energy Technology Laboratory

Peabody Coal CompanyPRB Coal in Gillette, Wyoming

Truck

Approximate Seam Height

34National Energy Technology Laboratory

Longwall Mining Drives Northern Appalachia and Illinois Basin

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35National Energy Technology Laboratory

Monthly Dry Shale Gas Production (Billion cubic feet per day)

Source: EIA, Natural Gas Weekly Update, http://www.eia.gov/naturalgas/weekly/archive/2015/07_16/index.cfm#tabs‐prices‐1

0

5

10

15

20

25

30

35

40

45

Jan‐00

Jul‐00

Jan‐01

Jul‐01

Jan‐02

Jul‐02

Jan‐03

Jul‐03

Jan‐04

Jul‐04

Jan‐05

Jul‐05

Jan‐06

Jul‐06

Jan‐07

Jul‐07

Jan‐08

Jul‐08

Jan‐09

Jul‐09

Jan‐10

Jul‐10

Jan‐11

Jul‐11

Jan‐12

Jul‐12

Jan‐13

Jul‐13

Jan‐14

Jul‐14

Jan‐15

Antrim (MI, IN, & OH) Bakken (ND) Woodford (OK)

Barnett (TX) Fayetteville (AR) Eagle Ford (TX)

Haynesville (LA & TX) Marcellus (PA & WV) Utica (OH, PA & WV)

Rest of US 'shale'

36National Energy Technology Laboratory

Coal Plant Retirements are in Central Appalachia Core Markets

Source: Energy Information Administration

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37National Energy Technology Laboratory

Summary

• Central Appalachia production has been declining for a long time– This is not a short‐term phenomenon

• The decline in Central Appalachia will continue– Competition from other regions for limited markets will be intense

• Natural gas is taking market share– Short‐term declines have been dramatic

• Environmental regulations are taking away domestic markets– Closing power plants

– Forcing scrubbing that reduces demand for lower sulfur coal

• Mining regulations are increasing production costs• Export markets are declining