MINE DOORS & PEDESTRIAN DOORS

Ventilation doors

AMD offers five different models of ventilation doors that are used in underground mining operations. Ventilation doors are used to exhaust gases, direct airflow or create an air lock.
Models vary from low pressure (smaller size doors) to high pressure (larger size doors).
AMD® engineering calculates the amount of force placed upon the proposed door, using water gauge, height, and width to determine the amount of torque. Once we determine the amount of force (the more surface area and the higher the water gauge, the more force required to open and close the door), we advise each customer on the proposed door model and construction.

VENTILATION DOOR MODELS

EcoVent Ventilation Door

Applications: Small door sizes / low air pressure/low cycles.
Improve mine safety.
Unmatched durability.
These doors are typically manual operation.
Can be used to create an “air lock”.
Do not have a full perimeter frame, doors are installed quickly using telescoping members between the floor and the roof.
Our most economical mine door offering.

400M Ventilation Door

800M Ventilation Door

HPM800 Ventilation Door

HPM1750 Ventilation Door

Roll-Up Doors

AMD Offers a full line of insulated and non-insulated roll-up doors for UG mining and surface mining applications. We also offer fire and smoke rated roll-up doors.

Roll-up doors can be used at the surface or underground: travel doors, service bays, battery charging bays, maintenance bays and fire doors.

These strong, durable, and curved slatted metal coiling doors are available in various gauges of steel and mounting configurations to accommodate almost any size openings.
Custom wing load designs available, standard 60PSF up to 250 PSF, consult factory.
Doors are designed for easy operation and are trouble free with minimal maintenance required.
Weather seals consist of a neoprene hood baffle, vinyl guide weather stripping and vinyl astragal on the bottom bar, with an option for 1½” perimeter brush seals.
Rigid and compact design which provides for a more structural grade product while reducing overhead space and obstruction.
Two-years warranty on material and workmanship. As we also offer an optional five-year prorated warranty.
High cycle roll-up doors used for ventilation control (travel doors) are offered in various life cycle ratings up to 400,000 cycles, please consult factory.

Fire and Smoke Ratings on Roll Up Doors.

3 hr Rating – 3 hour approved for doors in dividing fire walls.
1-1/2 hr Rating – 1.5 hour approved for doors, in vertical shaft openings.
3/4 hr Rating – 0.75 hour approved for doors in a corridor or a room-partition.
4 Hour Rated (Optional) – Consult factory for more information.

Fire Doors

All mining operations must adhere to specific requirements when it comes to fire safety. Mines regularly house hazardous and highly-flammable materials, making fire doors a necessity in some areas.
We regularly work with customers across the United States and around the world to customize durable, dependable fire doors for all types of mining operations.

Heavy-Duty Heat Protection

Our fire-rated mine doors are designed with heavy-duty, flame-retardant materials for added protection in the event of a mining emergency. These doors close and latch automatically, to prevent them from being left open during a fire.

Fire doors can be used to compartmentalize fires in various mining environments, quickly containing both flames and smoke while personnel are evacuated. The most common types of fire doors include:

Sliding doors: Commonly used in larger spaces where easier access to entry and exit points is needed to accommodate more people and bigger equipment.
Hinged doors: Preferred for use in mining facilities. These doors provide increased security, sound and light control, and require minimum maintenance.
Biothermal doors: Designed to prevent gas flow between areas by creating an airtight seal. They can withstand extreme pressure, chemical, and thermal damage.

Specifications and Details

We are proud to offer a certified F-120 rated “fire door” in our product line.
Utilizing our already proven High Pressure opposing wing door design, additional design and engineering was completed to: reduce the potential for leaks around the perimeter of the door and add high temperature ceramic insulation to the interior of the door wings.
High temperature ceramic seals capable of withstanding 2300°F provide an efficient seal between the door wings and frame, creating a barrier so gasses and particulates cannot pass through.
Tadpole gasket is used to seal the bottom of the door, Inconel woven covering and Inconel solid inner core offer superior abrasive resistance.
The interior of the door wings are insulated using an Alumina-Silica blanket, also capable of withstanding 2300°F, which greatly reduces heat transfer through the door.
If you are in need of an F-120 / NCh935 / 1.Of97 compliant mine door, American Mine Door can now supply you with this product.

Powder Magazine Doors

Type 1 Explosives Magazine Security Door & Type 2 Outdoor Magazine Security Door

AMD has designed and built these specialty doors that are required to meet the ATF’s Explosive Magazine Construction Requirements, 18 U.S.C , 27 CFR, Part 555, Subpart K-Storage.

We design and manufacture manual and automatic Explosive Magazine Doors that meet “TYPE 1 Magazines” as specified by the ATF. The Type 1 Magazine is the most stringent of the 5 different types of “Explosive Magazine Doors” designated by the ATF.

Specifications of a “Type 1 Explosives Magazine Security door”:

1/4” A36 steel plate covers door wings.
All exterior surfaces facing to the inside of the magazine are fully covered with 2 1/2” thick red oak planks.
Robust hinge design to handle the added weight of the wings.
2 mortise locks per door (each with its own key).
Fire retardant paint.
Incorporated ventilation frame (TYPE 1 ONLY).
Can be supplied as an “power actuated” door or manual operation.

Mine Door with Built in Dampers

Multiple configurations available.
Pedestrian door can be included.
Standard 1M x 1M dampers used in mine door application.
Choose from manual or motorized damper operation.
Can be tied into a PLC control for above ground control of the door and dampers.

Damper Design

AMD offers both parallel blade and opposed blade dampers, dependent upon type of application. Most mines use OPPOSED blade design.

As a very general rule, parallel blade dampers are used for open/closed operation and opposed blade dampers are used for modulating damper operation. However, parallel blades offer better control of airflow near the end of the operating range (near full open or full close positions). Opposed blades offer better control of airflow throughout the entire operating range.

Damper Door (Automated Regulators on Hinges)

AMD Damper Doors are available in almost any size and can be configured in a single wing or dual wing design. Damper doors can be opened manually and will allow access where drop board regulators cannot.

Dampers are used to automatically adjust airflow from above ground using network communications.
Damper door includes a robust frame consisting of two rectangular tubing vertical frame posts and a “C” channel cap. Hinges are bolted directly to the two vertical tube members. Damper design is self-supporting with two heavy duty “pin and bushing” style hinges welded directly to the damper. Once the frame is installed into a bulkhead, the damper doors simply drop down into their respective pivot points. Bearing are designed to last many years with minimal maintenance.
Choice of smart actuators from Triac or Auma. No complex PLC control systems required. NEMA4X enclosures, declutchable handwheel for manual operation. Modbus/TCP main control, and semi-integral digital control communications protocol (local/remote control with feedback and digital LCD display) Damper to fall in place on loss of power.
Typically installed at fresh air raises or return air raises.
Using a hinged damper door allow access to the raise for maintenance where a drop board regulator cannot.

Damper Design:

Rigid 1/4” thick carbon steel frame.
304 stainless steel axles, full length.
Relubricating ball bearings with fabricated carbon steel double gland stuffing boxes.
Heavy duty 304 stainless steel linkage arms and bar with stainless steel pins and OIB bearings with expanded aluminum linkage guard painted OSHA safety yellow.
Silicone “P” seals on blade edges w/ 16-gauge galvanized steel hold down strips and stainless-steel compression at jambs.
1/2” x 0.041” galvanized wire screen in aluminum, vee frame mounted on one or both sides of the damper.
Finish -Choice of galvanized or surface prep and blast per SSPC-SP10. One coat of primer and one coat of industrial enamel. Or SW Zinc Clad IV epoxy primer with one coat SW Macropoxy HS epoxy finish.

Battery Operated Door System

This system was designed to operate a door and electrical control system during a power outage or operate in areas where no power is available.
A door for areas with no electricity thanks to the battery backup system.
We have operated a mine door and all peripherals (traffic lighting/audible alarms/thru door scanner/pull switches etc..) for over 1700 cycles on two 12-volt batteries.
All testing was done in-house, and results will vary due to WG pressure and size of mine door. Using “battery packs” and a charging station, we can offer 100% battery operated door packages.

Pedestrian Door

AMD offers a variety of “pedestrian/ personnel doors,” accessible by miners for easy traffic flow and quick escape in emergency situations. Contact our experts to learn more about choosing the right mine door design for your location.

Pedestrian Door Models

Sliding Pedestrian Door in Mine Door – Used in high-pressure applications where room is not available to install a “stand alone” pedestrian door to the side of the primary mine door. These doors feature a dual-roller trolley for reduced friction, allowing them to open and close easily in all environments. Roller bearings at the bottom of the door reduce friction and allow the door to glide freely. Doors are typically gravity closure type to ensure doors stay in the closed position after entry/exit.
High Pressure Opposing Wing Pedestrian Door - Operates under the same principles as our traditional mine doors, utilizing an opposing wing design to cancel out the effects of static pressure. These doors remain easy to open, even in high-pressure environments with minimal risk of doors slamming shut. Rated as high as 20” Water Gauge.
Concave Pedestrian Door - Consists of a spring-assisted rotating door mounted in a steel channel frame. These doors allow for pedestrian access through areas with dangerous high winds and differential pressure, as a torsion spring closing assembly ensures door security at all times.
AMD Airlock Box - Our AMD dual man way chamber eliminates dangerous change of air pressure from one section of the mine to the other without breaching the ventilation route. This two door “Box Style” chamber permits the safe, easy passage of pedestrians between different air-pressures. Custom made to any width, height, length.
AMD Airlock Personnel Tunnel - Our AMD dual man way chamber eliminates dangerous change of air pressure from one section of the mine to the other without breaching the ventilation route. This two-door chamber consists of: a pedestrian door, a short “tunnel”, and a second pedestrian door, all a part of one complete assembly. Whether a Concave Pedestrian Door or an Opposing Wing Door it permits the safe, easy passage of personnel between areas of varying air pressure differentials.