The document discusses Beijing HOT Mining TechCo.,Ltd's expertise in developing technologies for low-seam underground coal mining in Southwest China. It describes the reserve of low-seam coal resources in the region, the disaster risks, and HOT Mining's technical solutions. These include integrated mining technologies for steeply inclined seams, low seams, and thick seams. The technologies improve mining efficiency and safety. HOT Mining also provides mine design, equipment, and after-sales support services tailored for difficult mining conditions.

1. Beijing HOT Mining TechCo.,Ltd
www.hot-mining.com
Coal Mining Technlogy Brief
- Low Coal Seam
Contact: hhuang@hot-mining.com

2. Beijing HOT Mining TechCo.,Ltd
www.hot-mining.com
Why HOT Know How?
-How to develop Low-Seam Underground Coal Mining.
The Reserve of Resources and Disaster in SouthwestChina
The Reserve of Resources
 The low-seam and extra low-seam whose thickness under 1.3m take 60% of the total. (among
which , extra low-seam whose thickness under 0.8m takes 30%.) The medium-thickness coalseam
under 1.3～3.5m takes 39%,(mostlyunder 2.0m) and for these whose thickness above 3.5m takes
10%.
 The flat seam and gently inclined seam take 55%, and the inclined low seam and Steeply inclined
low seam take 45% (among which, the seam with the inclination of 35. - 70. takes 30% of the total) .
 Fault , Fallen-columns , Fold , Joint ,Fracture Development， ComplicatedCoal Seam Structure,
Thickness Changes，Roof and FloorLack Stability.

3. Beijing HOT Mining TechCo.,Ltd
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The Disaster Situation
There’re various disaster factors such as water, fire, gas, coal dust, hydrogen sulfide and
roof existing in all the mines of Sichuan Coal Industry Group Limited Liability Company to
varying degree . The disasters gets severe and serious with the increase of the mining
depth.
Coal seam gas-bearing capacity is 10-25 m3/t, maximum coal seam gas pressure is
4.85MPa.
They are all the coal seam with low gas permeability and hard to exploit.
- Coal gas outburst and large amount of mines with high gas.
- Ten couples of mines with high possibility of coal seam spontaneous combustion.
- 23 couples of mines with high possibility of gas and dust explosion.

4. Beijing HOT Mining TechCo.,Ltd
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Major Technical Advantage of HOT Mining
1.Mechanized Mining Technology
 The Steeply Inclined Seams and Edge Seams Integrated Mining
Technology
 The low seam and Extra low seam Integrated Mining
Technology

5. Beijing HOT Mining TechCo.,Ltd
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The Steeply Inclined Seams and Edge Seams Integrated Mining
Technology
（1） Integrated Mining Technology
Developed with our domestic partners, HOT-mining firstly realized the integrated and
mechanized mining technology for the edge seams（35-55°）. For the Lvshuidong
Coal Mine, we solved the technical problems of skid resistance and safety protection of
the Coal Cutter, Conveyor, Hydraulic Support.

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The efficiency improvement of Lvshuidong Coal Mine
after taking the integrated mining technology.
The annual output increased by 469% and recovery of resources increased by
more than 1 times which reached the international leading level.
By continuous research and study for years, HOT
Mining achieved:
 The edge seams mining have been improved from about 30°to 60°；
 Our technology has been applied in Sichuan, Chongqing, Guizhou, Yunnan,
Hunan and other large provinces and cities with a total number of more
than 20.

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（2） Steeply Inclined Seams Pseudo-pitch Puppet Downward Integrated
Mining Technology
 To solve the technical difficulty of seam inclination over 60 ° and these under 60°but with soft
and sloughing- prone seam, Hot-mining among with other domestic expertpartners developedthe
steeplyinclined seams pseudo-pitchpuppetdownward integrated mining technologyand
complete setof equipment.
 This technologywas first tested and applied in Liziya South Coal Mine which is a coal and gas
outburst mine.
 The tested working face oblique 58 meters long. Its average thickness of coal was 1.93m,and its
average dip angle was 62°(somewas 70°). During the testing period,the average monthly
productionwas around 21,000 tons. No serious injury or other accidentwas reported and the
safety conditionwas very good.

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（3）Full Mechanized Mining-Sublevel Caving Mining Technology Applied
in Thick Coal Seam
Case: FMM-Sublevel Caving Mining Tech was adopted by Sichuan Coal Group Panmei
Company in Dabaoding Coal Mine, and achieved 100,000 ton output monthly on the
working face with 4.7m coal thickness and 45°inclination angle.
（4）The Thick Seam Mining with Large Dip Angle Integrated One-pass
Mining Technology
The test was started from June 2013, in Huashan Coal Mine 4238 working face and achieved
great success.
The testing production working face’s total thickness was 4.5-5.5m，and the dip angle was38
°-45°
The Yield level reached 70,000 tons. And the recovery of resources was improved. It also
enriched the diversity of our mining technology as well.

9. Beijing HOT Mining TechCo.,Ltd
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2.The low seam and Extra low seam Integrated Mining
Technology
（1）0.8-1.3m Low Seam Integrated Mining Technology
Feature： Independent research and development of low seam cantilever
Shearer , low machine surface height （570）, Coal is too high altitude
（300）, High installed power （421KW）， Cutting power up to 2 *
150KW, Coal loading effect（more than 90%）, strong adaptability of fault,
seam thickness and other geological conditions, to achieve a thin coal
seam face from the open gap, bidirectional cutting coal.

10. Beijing HOT Mining TechCo.,Ltd
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Three Engine Ground Test Site Working Face Production Site
Achieve 0.8-1.3 m thin coal seam double-drum shearer comprehensive mechanized and
efficient mining. At an average thickness of 0.85 meters of coal mine plums Pass layered
face, monthly production of 30,000 tons. To achieve a layered approximately 10.4 million
tons of coal resources under hard use plums Pass mining, and prolong the service life of
mine for about nine years.

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（2）Low Seam Mining
 Developed bottom climbing electric traction shearer ，for the first time achieved a
minimum limit of low seam mining height 0.55m mechanized mining.
Artisanal Mining The Comprehensive Mechanized Mining
The application of the technology, coal face yields 1.8 times, mining efficiency
increased by 3.38 times, tons of coal production cost was reduced by 63%.

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Technology Governance Disaster Technology
（1）Gas and Fire Prevention Technology
 Thin and very thin coal seam mechanized mining technologies,boosting mining protective layer,
realize the coal (rock) and gas simultaneous extraction.
 Carry out pre-splitting blast, slotting, hydraulic fracturing technologyresearch to improve the low
permeabilitycoal seam gas extraction efficiency.
 Carry out along the empty roadway protectiontechnologyresearch,implementation of the "Y" type
ventilation, governance Face Gas gauge.
Low permeability coal seams gas comprehensive control technology, early prediction of
coal seam spontaneous combustion technology in the domestic leading level.

13. Beijing HOT Mining TechCo.,Ltd
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（2）Waterproof Technology
Across the country, HOT takes the lead in developing south karst mine
waterproof technology research.
Build complex hydrogeological conditions of mine “Have dug will explore” of
“Four in One”（ Monitoring and forecasting, combined with anti-exploration,
test management, comprehensive protection ） Waterproof Technology
Security System .
Through technological disaster governance, improved security degree,
maximize the effectiveness of mechanized equipment,and create the conditions
to achieve high yield and efficiency 。

14. Beijing HOT Mining TechCo.,Ltd
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MG300(250)/722(622）
HOT Ac Traction Shearer
Independently Developed of Steeply Inclined Shearer and
Low Seam Shearer
MG150/421
HOT Climb Floor Outer Traction Shearer
MG2×100/495
HOT Ac Traction Shearer

15. Beijing HOT Mining TechCo.,Ltd
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Independentlydeveloped fordifferentmining conditions of burial and big dip face outfit (bracket,
shearer, conveyor, dual horizontal end bracket), and achieved 16 patents.
Frame Between Block
and Gangue Device
Before the
Gangue Device
Auto-balancing
Device
Scalable Connection
Device
Hydraulic
Support
Shearer
Scraper
Conveyer
Fault Force
Braking
Integrally Cast
Pin Line
Trap Device
Lateral Push
Unit

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Working Face Ended Support
Horizontal Lower End Hydraulic Support
Variable
Angle
Retractable
Roof Beams
Coal
Channel
Walkways
Transversal Arrangement Pedestrians and Coal Separation
Noninterfering with the Loader Overall Mobile Whole Sealing
The third generation of the Lower End Hydraulic
Support Site Layout

17. Beijing HOT Mining TechCo.,Ltd
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Steeply Inclined Series Hydraulic support
Large Dip Angle Large Mining Height Hydraulic Shield Support

18. Beijing HOT Mining TechCo.,Ltd
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Mine Design
HOT can help you to maximize ore reserve value basis on our operating expertise.
We have years of underground mine engineering and operating experience and across
multiple commodities using all common mining methods.
Especially, we have many successful design and operation experiences for underground
coal mines those are thin coal seam, large dip angle, as well as many faultags. And most
of these coal mines (thin coal seam) are designed and operated by longwall mining
method (fully mechanized mining). The thin coal seam longwall method helps to satisfy
the highest safety standard and more margins.
• Large dip angle, thin coal seam longwall（dip angle range: 35°-55°）
• Thin coal seam, very thin coal seam longwall（Thinnest seam range: 0.8m ~ 1.3m）

19. Beijing HOT Mining TechCo.,Ltd
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Our Engineering Partner and Detail Drawing Supplier, Design and Research Institute of
Sichuan Coal, which is a State-Owned Engineering Company and also focuses on thin
coal seam mining and surface mining.
Currently there are 181 engineers, including 56 senior engineers (including 7 professor
senior engineers), intermediate title 60, primary title 55. Covering geology, mining, mine
construction, ventilation, electrical, communication signals, automation and industrial
control, mechanical, electrical, coal washing, utilization, building, construction,
environmental protection, HVAC, plumbing, general layout and transportation, roads,
technical and economic and more than 20 majors. Has completed more than 1,000 types
of mining design, engineering consulting, completed more than 600 feasibility studies,
master planning, project proposals and tenements settings and other projects, but also
provide the technological transformation of state-owned key coal mines and small coal
mines, vision and chemical aspects of mining, construction and engineering, building
anti-shock technology consulting services.

20. Beijing HOT Mining TechCo.,Ltd
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CNC Cutting Machine

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Beveling Robot

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Through Type Shot
Blasting Machine

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Large CNC Positioner

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Assembly Platform

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Welding Preheating Furnace Welding Aging Furnace

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Axial parts Heat
Treatment Furnace

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Double-sided
Boring Machine

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CNC Machine Tools

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The Welding Robot
Work Group

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Welding Robot Station

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Hydraulic Support
Test Rig

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HOT Mining independently
developed the tester for 2500
tons of crushing, which can
take 0.65 ~ 7.0 meters of all
kinds of hydraulic support
crushing test.
Support Pressure Test

33. Beijing HOT Mining TechCo.,Ltd
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The Busy
After-sales Team

34. THANK YOU 谢谢