Safety features for HEMMs and Heavy/Light Vehicles as outlined in the DGMS (Tech) Circular 06 of 2020

1. Rear Vision Camera

• The system includes a monitor and camera capable of detecting objects in blind spots.
• It boots automatically with the engine and shuts down accordingly.
• It switches to standby mode and activates when the machine is in reverse, ensuring uninterrupted vision.
• It operates in low-light conditions by switching to infrared if needed.
• The system must meet ISO 16001 standards for performance and IP69K for ingress protection.

2. Warning System for Operator Fatigue

• The system detects drowsiness by analyzing the operator’s behavior.
• Provides both visual and audio alerts to warn the operator and others nearby.
• It features stages like initialization, continuous tracking, and warning, with systems designed to avoid startling the operator.
• System health and malfunction indicators are mandatory, and warnings are logged for future analysis.

3. Auto Dipping System

• Automatically switches headlights between high and low beams to prevent glare for oncoming vehicles.
• It activates at a distance of about 150 meters and switches back after the vehicles pass.
• The system should include filters to prevent false triggers from other light sources like pole lights.

4. Mechanical Device to Avoid Head-to-Tail Collision

• The system absorbs or diverts collision energy to protect the operator in the event of a head-to-tail collision between dumpers.
• It should be part of the original design in new dumpers and must not obstruct visibility or affect stability.

5. Automatic Fire Detection and Suppression System (AFDSS)

• Detects and suppresses fire automatically in hot zones such as the engine and exhaust.
• Should have both automatic and manual activation controls.
• The system covers all fire-prone areas and provides visual and audio alerts.

6. Dump Body Raised Position Indicator

• The system alerts when the dump body is raised beyond a safe position with both visual and audio warnings.
• Transmission is restricted beyond first gear until the body is fully lowered.

7. Exhaust Brake

• An auxiliary braking system for dumpers and heavy vehicles.
• The system should meet performance standards like ISO 16479 for braking systems.

8. Load Indicators

• Automatically monitors the load and provides external indicators for under-load, safe load, and overload conditions.
• It provides continuous audio warnings when overloaded, and the system must prevent manual overrides.

9. Dump Body Stabilizers for Tippers

• Prevents toppling or separation of the dump body during unloading.
• Adequate mechanical stabilizers should be provided to ensure safety during the dumping operation.

10. Seat Belt and Seat Belt Reminder

• A 3-point seat belt system with visual and audible reminders if the seat belt is not fastened.
• The reminder system provides two levels of alerts: one when the ignition is on and the other when the vehicle is moving without a fastened seat belt.

11. No Bump Circuit for Drills

• Controls the speed of vertical travel and rotation during drill rod connections to prevent damage.
• The system automatically adjusts to safe speed levels.

12. Breakout Wrench for Drills

• A device that automatically adjusts to the diameter of the drill rod and safely breaks out tightly threaded connections.
• The wrench should be mounted in a way that does not obstruct visibility.

13. Propel Joystick-Spring Loaded (Dead-man Safety) for Drills

• The joystick automatically returns to neutral upon release, halting the tramming operation immediately.

14. Proximity Warning Device

• Detects static and moving objects, including people, around the dumper or tipper during movement.
• Provides audio-visual warnings to prevent collisions.
• The system must detect objects within a virtual target area and adjust the warning based on speed and direction.

These systems and features are essential for ensuring the safe operation of heavy machinery in open-cast mines. The guidelines are designed to minimize accidents and enhance operator safety.