1. Working Conditions
Tundra Soil (Gley Soil): dark gray to gray-black, peat or meadow layers on surface, underlying soil in perennially low-temperature frozen or seasonally freeze-thaw state. Water content 40%-80%, bearing capacity extremely low, hardness <15MPa, very soft to soft soil.
Mono-arm ripper (C Series) is recommended for high-water, low-bearing, cold-environment tundra soil. Flexible operation and controllable grabbing force, paired with breaking bucket, effectively handle seasonal freeze-thaw layers.
 
2. Recommended Equipment
Model
Excavator Tonnage
Application
Core Advantages
CSJ400C
40-65t
Surface stripping, peat layer clearing
Compact, flexible, low-temp wet environment
CSJ700C
65-85t
Medium-to-large mine large-scale stripping
High output, best cost-performance
CSJ900C
85-95t
Deep tundra soil, seasonal freeze-thaw layer
Strong penetration, wear-resistant, continuous heavy-duty
CSJ1200C
120t
Super large mine, high-intensity continuous operation
Extra-large working radius, highest single-shift output
 
 
3. Production Rate
Soil Hardness
CSJ400C (40-65t)
CSJ700C (65-85t)
CSJ900C (85-95t)
CSJ1200C (120t)
5-10MPa (soft soil)
280-340m³/h
310-380m³/h
350-420m³/h
400-480m³/h
8-15MPa (seasonal freeze-thaw)
220-280m³/h
250-310m³/h
290-350m³/h
340-410m³/h
12-18MPa (semi-frozen)
160-220m³/h
190-250m³/h
230-290m³/h
280-350m³/h
15-22MPa (frost heave)
120-170m³/h
150-200m³/h
190-250m³/h
240-300m³/h
 
Reference data from Mono-arm ripper field tests. Hardness generally 5-15MPa; C Series fully capable.
 
4. Construction Process
· Tundra Soil Survey: Confirm layer thickness, permafrost depth, water content, and peat thickness; assess bearing capacity and operating conditions
· Freeze-Thaw Pre-treatment: Seasonal freeze-thaw layers have higher hardness; pre-break with the ripper breaking bucket to reduce overall stripping resistance
· Surface Stripping: Strip surface peat or meadow layer with the ripper to expose underlying tundra soil; control stripping thickness 300-500mm
· Layered Stripping: Strip from top to bottom along soil direction; control product size ≤400mm to avoid over-crushing
· Drainage & Drying: Tundra soil has extremely high water content; drain and dry after stripping to meet subsequent use requirements
· Site Grading: Grade the site after operation to restore surface morphology and meet cold-region land reclamation requirements
 
5. Efficiency Comparison
Item
Traditional Excavator Direct Mining

Daily Output (8h shift)
1000-2000m³

Freeze-Thaw Layer Breaking
Poor (high resistance, freeze-thaw layer hard to handle)

Equipment Stability
Low (soft soil low bearing capacity, equipment prone to sinking)

Soil Quality
Average (direct excavation, high water content)

Environmental Compliance
Average (large disturbed area, severe ecological damage)

 
 
6. Construction Precautions
· Operating Time Window: Tundra soil has a strict seasonal window; operate during summer thaw period (June-September); frozen soil in winter cannot be effectively stripped
· Low-Temperature Equipment Protection: Cold-region operation requires low-temperature hydraulic oil (specification below -40C), insulate hydraulic lines to prevent oil solidification
· Prevent Equipment Sinking: Bearing capacity is extremely low; lay road boards or steel plates for equipment movement to prevent excavator sinking
· Model Selection: Hardness 5-15MPa; C Series fully capable, no J Series needed
· Ecological Protection: Tundra ecosystem is fragile; conduct environmental impact assessment before construction, minimize disturbed area, and perform land reclamation and vegetation restoration promptly after construction