800-Person Modular Worker Camp for Mongolia Copper-Gold Mine — South Gobi Extreme Cold Solution

Project Background

A copper-gold mine expansion project in Mongolia's South Gobi province required urgent workforce accommodation. The site is located approximately 550 km south of Ulaanbaatar, just 80 km from the China-Mongolia border. As the project transitioned into underground mining expansion, the construction workforce grew from 300 to 800 workers — far exceeding the capacity of existing facilities.

The region experiences extreme continental climate — winter temperatures dropping to -35°C, summer surface temperatures exceeding 40°C, annual precipitation below 100mm, and frequent sandstorms. Under these conditions, traditional reinforced concrete construction is impractical — curing alone would consume most of the project timeline.

Client Requirements

The core challenge: short deadline + extreme cold + remote location = traditional construction methods completely unworkable.

Solution

Site Layout

The camp was designed with a modular layout divided into four functional zones:

Zone A – Accommodation (Core)

• 160 double-occupancy modular宿舍 units (2 persons per room × 400 rooms = 800 beds)
• Each unit includes en-suite bathroom, wall-mounted heating, and personal storage
• Two-story steel frame structure with crane-lifted module installation

Zone B – Office & Command Center

• Project management offices × 2 buildings
• Conference room × 1 building
• Safety training center × 1 building

Zone C – Living Facilities

• Cafeteria (400-person capacity, simultaneous seating) × 2 buildings
• Medical clinic × 1 building
• General store × 1 building
• Recreation center (gym, reading room) × 1 building

Zone D – Logistics Support

• Diesel power station × 2 units (primary + backup)
• Water supply system (deep well pump + storage tanks + purification)
• Wastewater treatment station × 1 unit
• Warehouse × 2 buildings

Key Technical Specifications

Insulation Design Details

Mongolia's winter is no joke — -35°C combined with unobstructed Category 8 winds across the Gobi Desert creates wind-chill equivalents below -45°C.

Our solution employs a three-layer insulation system:

1. Exterior walls: 75mm rock wool sandwich panels (thermal conductivity ≤0.040 W/m·K) + 50mm interior glass wool blanket, achieving composite thermal resistance of R-5 or above
2. Roof: 100mm on-site polyurethane spray foam, seamless coverage eliminating thermal bridges
3. Floor: 150mm elevated air gap + 50mm XPS insulation board, preventing ground frost penetration

Test results: With exterior temperatures at -35°C and heating running at 60% capacity, interior temperature maintained a stable 20°C.

Logistics Plan

The site is 550 km from Ulaanbaatar and approximately 280 km from the Ceke Border Crossing with China.

Optimal route:

China Tianjin Port → Ceke Border Crossing (approx. 1,200 km overland) → Customs clearance → Mine site (approx. 280 km by road)

Module transportation:

• Each 40-foot container accommodates 2 flat-packed modules
• Total camp required approximately 40 × 40-foot containers
• Road conditions between Ceke and the site required reinforced transport vehicles
• Total transit time: approximately 15 days

On-site assembly:

• First worker move-in: 47 days from first material delivery
• Full camp handover: 82 days (8 days ahead of the 90-day deadline)

Cost Comparison

The modular solution delivers approximately 30% cost savings over traditional concrete construction while reducing project timeline by over 60%. Although slightly more expensive than container conversions, it provides vastly superior insulation — a non-negotiable requirement in Mongolia's climate conditions.

Client Feedback

"At our previous mine site, we used converted container accommodations. Workers couldn't sleep through the complaints about the cold. After switching to the modular solution, interior temperatures remained stable and worker satisfaction improved dramatically. The biggest advantage was completing everything in one phase — no curing wait times like concrete. We delivered the entire camp before winter set in."

— Camp operations lead, winter 2025 operational review

Why Modular Construction

Mining camps in Mongolia face the triple challenge of extreme climate + compressed timelines + remote locations. Traditional construction methods become nearly impossible on the Gobi Desert at -35°C — concrete requires positive temperatures for curing, masonry work efficiency plummets in winter, and worker productivity drops sharply in severe cold.

The core advantage of modular construction is that 90% of work is completed in the factory:

• Steel frame structures welded and assembled in the workshop
• Wall panels, insulation, windows, doors, and pre-embedded MEP systems installed in controlled conditions
• On-site work limited to crane lifting, module connection, and utility hookup
• Zero dependency on site climate — construction proceeds normally even in winter

For mining projects in extreme cold regions such as Mongolia, Kazakhstan, and Russia's Far East, modular construction isn't a "better option" — it's the only viable option.

Need Camp Accommodation for Your Mining Project?

9States provides end-to-end modular camp solutions from design to delivery, covering Central Asia, Southeast Asia, the Middle East, Africa, and South America.

www.9prefabhouse.com