Challenge toward Carbon Neutralityof Kushiro Coal Mine(KCM)

September 6th 2023

Kushiro Coal Mine CO., Ltd.
MATSUMOTO Hiroyuki
1Contents of Presentation
1. Outline of Kushiro Coal Mine (KCM)■ History and Outline■ The Training Project on Coal Mining Technology■ Collaboration between KCM and Kushiro Power Plant■ Room and Pillar Mining■ Filling with Fly-ash in Mined Out Area

2.

Carbonate Mineralization and Enhanced Coal
Bed Methane (ECBM)■ Field Trial of Carbonate Mineralization in Mined Out Area
■ Field Trial of ECBM
■ Future Plan2

1. Outline of Kushiro Coal MineLocation ofKushiro Coal Mine

Hokkaido Pref.
SapporoKushiroAbout 1000km

KyushuRegionTokyo3

1. Outline of Kushiro Coal MineHistory

Close of Taiheiyo Coal Mine andEstablishment of KCM• 27 Dec, 2001
• 30 Jan, 2002
• 31 Jan, 2002
• Nov, 2019

Establishment of KCM
Close of Taiheiyo Coal Mine Operated
from 1920 (2 million ton annually)
Start of Operation of KCM
0.7 → 0.5 million ton annually
Change of Mining Method fromLongwall(L/W) to Room & Pillar
0.3 million ton annually41. Outline of Kushiro Coal Mine

Business of KCM• Coal Mining and Sales－ Fully Mechanized Longwall Mining →Room and Pillar Mining• Government Commissioned Training Program– Start from 2002
– Accept the Trainee and Dispatch of Engineer– Around 150 Trainees Come from Vietnam, China, Indonesia and Colombia,
Annually• Start up Business– KCM Cooperation（KCMC）
••
•
•
•

Crushing Treatment of Oversize Garbage
Garbage Collection
Operation of Garbage Incineration Facility from 2006
Operation of Kushiro Power Plant from 2020
Administration of KCM– Kushiro Auto Recycle Co.,Ltd.
– KCM Engineering Co.,Ltd.
– Kushiro Power Service Co.,Ltd.

• Cooperation Research– JCOAL– Private Company– Institute, University51. Outline of Kushiro Coal Mine

Number of Acceptance of Trainee
2002～
2014
2013

2015

2016

2017

2018

2019

2020

2021

2022

合計

Vietnam

1,217

82

84

8474

7070140※

345※

70

2,236

China

953

63

56

54525655107※

220※

220※

1,836

Indonesia

0010

12

20

191328※

98※

24

224

Colombia

00000

4510※

38※

21

78

Total

2,170

145

150

150

146

149

143

285

701

335

4,374※ On-line Training

Number of Dispatch of Lecturers（Cumulative Total Number）
2002～
2014
2013

2015

2016

2017

2018

2019

2020

2021

2022

合計

Vietnam

2,414

457

230

169

185

151

162

50

33100

3,951

China

231

1243444000262

Indonesia

4400000000044

Total

2,689

469

234

172

189

155

166

5033

1004,257

2020～2021 On-line Training61. Outline of Kushiro Coal Mine

Introduction of Electric Power Plant
・ Boiler Type :Circulating Fluidized Bed・ Maximum Steam Flow :370 t / hr・ Steam Temperature :560 ℃ / 540 ℃・ Steam Pressure :17.0 MPaG (Heater Outlet )3.1 MPaG (Re-heater Outlet)
Water Treatment

Exhaust Tower

Boiler Area Building
Turbine Building
CoolingTower

・ Steam Turbine Type :Re-heat Condensing Turbine
・ Generator Output :112,000 kW
・ Fuel :Coal (70%), Biomass (30%)
Kushiro Power Station Co., Ltd.

7

1. Outline of Kushiro Coal MineCollaboration between KCM and Power Plant■ Provide Strong Industrial Area against the Earthquake and Tunami■ Provide Low Pollution Coal and Local Consumption■ Provide Clean Mine Water as Cooling Water (No Use of Sea Water)■ Receive Warm Drainage Water after Cooling Tower as Coal
Preparation Water■ Receive Ash as Filling Materials for Mined out area
■ Provide Engineers, Qualified Persons and 3 Shift Workers■ Propose New Training Course of Coal Utilization including ElectricPower Plant and Environment for Training Project■ Others81. Outline of Kushiro Coal Mine

Mining Method(at Present)• Roadway Heading– Combination Continuous Miner and Shuttle Car– Room & Pillar Mining– 3-4 Units Working Annually

Continuous Miner

Shuttle Car
91. Outline of Kushiro Coal Mine

Road Heading - Single Entry System

Continuous Miner
Belt Conveyer

Shuttle Car

Transportation Sledge
for Providing Heading Materials
101. Outline of Kushiro Coal Mine

Sequence of Room & Pillar Mining and Filling① Roadheading Supported with Steel Arch

② Recover Steel Arch and Coal Extraction Both Sides③ Continue to Recover Steel Archand Coal Extraction Both Sides④ Fly-ash Filling in Mined out Area

Fly-ashPlug11

1. Outline of Kushiro Coal Mine

Sequence of Room & Pillar Mining and Filling
Room and Pillar Plan
Trunk Roadway

Seal

Branch Roadway
Inlet
Roadway

Outward Mining

Exhaust Roadway(Conveyer Belt)

Return Mining
Shuttle Car
Continuous Miner12

Contents of Presentation
1. Outline of Kushiro Coal Mine (KCM)■ History and Outline■ The Training Project on Coal Mining Technology■ Coexistence between KCM and Kushiro Power Plant■ Room and Pillar Mining■ Filling with Fly-ash in Mined Out Area

2.

Carbonate Mineralization and Enhanced Coal
Bed Methane (ECBM)■ Field Trial of Carbonate Mineralization in Mined Out Area
■ Field Trial of ECBM
■ Future Plan13

２. Carbonate Mineralization and Enhanced Coal Bed Methane (ECBM)

Purpose of Fly-Ash Filling in Mined out Area••••

To Reduce Stress Concentration on Remaining Area
To Prevent Gas and Water Emission from Mined out Area
To Prevent Spontaneous Combustion Due to Air Inflow
Fly-Ash Disposal
Fly-Ash Slurry FillingSealing

Next Target

Fly-AshCarbonated Mineralization(CaCO3, MgCO3)(After Natural Dehydration,Only Fly-Ash are Remained)

Carbon Dioxide(CO2)• Increase of Filling Strength• Stabilization Disposal of CO214

２. Carbonate Mineralization and Enhanced Coal Bed Methane (ECBM)

Diagram of Mixed Flow of Fly-Ash Slurry and CO2 Gas
CO2 Tank

Water Tank

Storage Warehouse

Mixing Facility
Hoppervaporizer

Fly-AshAgitator

Surface
Underground

Plug

Pump Room

Fly-Ash Filling(Carbonated Mineralization)

採掘跡

15

２. Carbonate Mineralization and Enhanced Coal Bed Methane (ECBM)

Mixing Facility of Fly-Ash Slurry andCO2 GasLiquefied
CO2 Tank

Vaporizer

Fly-Ash Slurry production Facility
Gas
Holder

Water Tank

Fly-ash Storage

CO2 GasFacility
Flow Meter
Gas
Holder

Fly-Ash Slurry Line
CO2 Supply LineRegulator

Mixing Pointof CO2 Gas16

２. Carbonate Mineralization and Enhanced Coal Bed Methane (ECBM)

Specification of the Facility of
Fly-Ash Slurry Production Plant and CO2 Gas mixing• Fly-Ash Slurry Production Plant–––––––

Fly ash Storage
Hopper in Storage
Hopper in Facility
FeederVibrating Screen
Agitator
Flow Rate• CO2 Gas Mixing–––––

Liquefied CO2 Tank Capacity
CO2 Gas Holder Capacity
Vaporizer Capacity
Gas supply Pressure (Primary Pressure)
Safety Device
Liquefied CO2 Tank Safety Valve
CO2 Gas Holder Safety Valve
Piping Safety Valve (Liquefied)

800m3
5m3
15m3
20t/h
mesh size 25mm
3.2m3
0.5-0.6m3/min
9.7t
2m3
400kg/h0.7MPa
2.24MPa
1.08MPa
2.99MPa17２. Carbonate Mineralization and Enhanced Coal Bed Methane (ECBM)

One of Carbonate Mineralization Field Test Sites
Room and Pillar Mined out Area
L/W Mined out Area

LegendStress Sensor
Filling Pipe Line
CO2 Sensor

f SealO2 SensorfTemperature Sensor
FanVentilation TubeVentilation Door

SealfSeal

Filling with CO2
Mined out Area
L/W Mined out Area18

２. Carbonate Mineralization and Enhanced Coal Bed Methane (ECBM)

One of ECBM Field Tests, Boring Sites Layout
Room and Pillar Mined out Area

Methane Gas Reserve Test
19

２. Carbonate Mineralization and Enhanced Coal Bed Methane (ECBM)

Future Vision

Based on the needs of coal-producing countries, the future vision of carbon dioxidemineralization, ECBM, and carbon dioxide storage in coal mines proposed by KCM.

Filling PlantFilling with CO2

CO2 Separation
and Recovery Plant

Electric Power Plant

CO2 Adsorption/CH4 Recovery（Enhanced Coal Bed Methane）

CO2 Storage (CCS)20

Thank you for your attention

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