01 / 05
Plan the mining units first
The working face is divided into mining units. Drilling, transport, backfilling and methane drainage are planned around the conditions at the face.
JINGCHEN SMART MINING
Unmanned mining
for steeply inclined seams
High-pressure rotary waterjets break the coal. Surface operators control the process, with transport, backfilling and water reuse integrated into the mining system.
- 01Rotary waterjet cuttingCOAL FRAGMENTATION
- 02Surface remote controlUNMANNED COAL FACE
- 03Closed-loop water reuseWATER RECOVERY
CORE TECHNOLOGY
From the coal face to the control room
Designed for steeply inclined coal seams, the method divides the working face into units and uses rotating high-pressure waterjets to break up the coal under remote surface control.
02 / 05
Break up the coal with high-pressure waterjets
Surface pumps supply high-pressure water underground. A rotary jet tool breaks up the coal as it withdraws through the borehole. Operators control the coal face from the surface.
03 / 05
Move the coal and separate the water
Coal moves along the inclined seam floor into the lower roadway. Scraper conveyors, mesh belts and dewatering screens separate the coal from the water.
04 / 05
Backfill in stages
A surface station sends backfill material through underground pipes. Each stage cures to its specified strength before the next pour. Methane drainage continues throughout.
05 / 05
Return treated water to the cutting system
After coal separation, the water settles and is clarified before returning to the reservoir. High-pressure pumps then feed it back into the cutting system.
Suitability and operating parameters depend on the conditions at each mine.
Technical demonstrationSteeply inclined seams
The main area of research for rotary cutting and remotely operated coal faces.
Gently inclined and near-horizontal seams
R&D includes unmanned coal handling and side-cutting technology for thin seams.
Mine hazard prevention
Research covers face spalling, roof falls, floor heave, coal pillar stability and fractured fault zones.
EQUIPMENT & MATERIALS
Equipment and materials for each stage
Our R&D spans rotary cutting equipment and backfill materials suited to different underground conditions and tasks.
01High-pressure rotary waterjet mining system
Equipment for coal fragmentation, remote control and unmanned coal-face operations.
02Floor anchor-cable drilling rig
Designed for anchoring work in the floor of mine roadways.
03Rock rheology and in-situ stress testing equipment
A non-electric true triaxial rock rheology tester and a 3D hydraulic-fracturing stress measurement system.
04Equipment for thin and gently inclined seams
High-pressure side-cutting equipment for thin seams and unmanned coal handling systems for gently inclined or near-horizontal seams.
01Ultra-high-performance composite cement
Neat-paste compressive strength above 120 MPa.
02Two-component backfill and reinforcement cement
Neat-paste compressive strength above 15 MPa at 1 hour and 75 MPa at 28 days.
03High-expansion Portland cement for sealing gas drainage boreholes
Neat-paste compressive strength above 18 MPa at 7 days and expansion above 5%.
04High-performance sprayed coal-gangue mortar
Rebound below 6% and compressive strength up to 65 MPa.
05Rapid-hardening cement for roadway floors
Used to harden waterlogged and muddy underground roadway floors.
Material test results reported in the company brochure.
Equipment manufacturing partner
Baoji Aerospace Power Pump Co., Ltd.
Contributed to development of the high-pressure rotary waterjet system.
ABOUT JINGCHEN
Based in Hefei, working globally
Jingchen Smart Mining develops intelligent coal mining and mine hazard prevention technologies in Hefei, alongside equipment for underground operations.
Hefei Jingchen Smart Mining Technology Co., Ltd.
Research team lead
Professor Laiwang Jing
Professor and doctoral supervisor, recipient of a special allowance from China’s State Council. Former Dean of the School of Science at Anhui University of Science and Technology and former chief scientist for a project at the State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines.
More about his research career
He previously led the university’s School of Mechanics and Optoelectronic Physics and its Institute of Mining Engineering Mechanics and Support Technology. He also served as chief scientist for a project at the State Key Laboratory of Deep Coal Mining and Environmental Protection.
People first · Technology-led · Innovation · Global service
PARTNERSHIPS
Tell us about your mine
Contact us to discuss steep-seam mining, technical suitability, equipment and potential partnerships.
Business enquiries
+86 186 1819 6699Mr Ding
Business enquiries
+86 150 8219 7777