1) The system comprises six major systems: entry safety, travel safety, ventilation system, excavation face, and safety refuge.

2) Entry safety includes: personal protective equipment for entry; respiratory protection (positive pressure oxygen respirator BG4, isolated self-rescuer)

3) Precautions for items carried into the well: items carried into the well (spare oxygen cylinders, replenishers, general stretchers, negative pressure stretchers, thermal blankets, resuscitators, disaster area direction indicators, copper tools, fire extinguishers, air barriers, canvas buckets, life locks, exploration rods, first aid kits)

4) Instruments carried into the well: gas detection instruments (optical gas detectors, multi-gas detectors, portable detectors, gas detector tubes)

5) Other detection instruments: (thermometers, rangefinders, pressure gauges, miner's lamps, locators, communication instruments)

6) Travel safety: entry travel; riding in cages; riding in inclined shaft man-cars; riding in rubber-tired vehicles; riding in monkey cars; riding in adit man-cars; walking into the well

7) Underground travel: riding in trolley-type man-cars; riding in battery-powered man-cars; riding in monkey cars; riding in rubber-tired vehicles; walking underground

8) Ventilation system: main fan types; axial flow main fans; centrifugal main fans; counter-rotating main fans

9) Main fan reversal: main fan reverse rotation reversal; reversal duct reversal; main fan reversal drills; main fan working methods; main fan exhaust ventilation; main fan forced ventilation

10) Mine ventilation methods: central ventilation; diagonal ventilation; mixed ventilation

11) Ventilation network: parallel ventilation; series ventilation; diagonal ventilation

12) Ventilation facilities: air doors (ordinary air doors, reversal air doors, double-leaf air doors, pneumatic air doors, interlocked air doors); air walls (temporary seals, permanent seals, fire zone seals, explosion-proof walls, foam rapid seals); air bridges (detour air bridges, partition air bridges, duct-type air bridges); air regulators (adjustable air regulators); explosion-proof doors (vertical shaft explosion-proof doors, inclined shaft explosion-proof doors, adit explosion-proof doors); ventilation fans (main ventilation fans, auxiliary ventilation fans); ventilation ducts (ordinary flexible ducts, rigid frame ducts, rigid ducts)

Main roadways in coal mining faces: intake airway; return airway; low drainage roadway; high drainage roadway (high-level drainage roadway); bottom drainage roadway (floor drainage roadway)

1) Coal mining face: types of coal mining faces (longwall mining face, continuous miner mining face); coal mining methods in longwall mining faces (fully mechanized mining, conventional mining, blasting mining); equipment in fully mechanized mining faces (shearer, hydraulic support, front scraper, rear scraper, end support, power supply system, control system, hydraulic system, spray dust suppression system); ventilation and gas management in fully mechanized mining faces (regulations, coal rib, upper corner, lower corner, machine head, machine tail, roof, behind support)

2) Excavation face: excavation face ventilation; excavation face ventilation (single heading excavation, double heading excavation, forced ventilation, exhaust ventilation, mixed forced and exhaust ventilation)

3) Excavation methods: fully mechanized excavation; blasting excavation

4) Six major safety refuge systems: monitoring and control system, underground personnel positioning system, underground emergency refuge system, mine compressed air self-rescue system, mine water supply rescue system, mine communication system

System Functions:

1. User login authentication;

2. The system is divided into training mode and assessment mode. In assessment mode, the system can submit user assessment results to the backend management system;

3. Supports user interaction with virtual equipment in the virtual environment through VR controllers;

4. Supports users navigating the system via controller operation;

Technical Approach:

The system is developed using the Unreal Engine, leveraging PBR materials to realistically present the underground working environment in virtual reality. Particle systems are used to simulate effects such as water spraying and dust during operations.