VR Practical Training System for Safe Operation of Underground Maintenance Mechanics

System Content:

Main modules include: Underground maintenance fitter operating procedures, pre-operation preparation training, maintenance operation training, equipment trial run operation process training, structure and usage training of commonly used tools and measuring instruments for fitters;

Pre-operation preparation includes:

Before equipment maintenance, prepare all necessary spare parts, materials, tools, equipment, and safety protection gear, and conduct thorough inspection and testing to ensure smooth maintenance and safe operation.

Before operation, cut off or shut down the power, water source, etc., of the equipment under maintenance and hang a "Work in Progress" warning sign.

Before operation, carefully inspect the construction conditions of the work area to ensure the safety of personnel and equipment.

Commonly Used Tools and Measuring Instruments for Fitters

Tools: Scribers, surface gauges, dividers, center punches, and surface plates for marking; hammers and chisels for chipping; various files for filing; hacksaws and blades for cutting; twist drills, countersinks, and reamers for hole processing; various taps, dies, and wrenches for threading; flat scrapers and curved scrapers for scraping; wrenches and screwdrivers.

Measuring instruments: Steel rulers, knife-edge straight edges, inside and outside calipers, vernier calipers, micrometers, squares, protractors, feeler gauges, dial indicators.

Maintenance Operation Training:

1. The maintenance personnel's routine inspections and daily maintenance tasks for the equipment under their responsibility each shift are as follows:

a) Check whether the components and parts of the maintained equipment are complete, intact, and reliable.

b) Promptly inspect and address issues identified during equipment operation.

c) Regularly adjust and test relevant safety protection devices to ensure they are safe and reliable.

d) Check the hydraulic oil volume, oil quality, lubricating oil volume, and oil quality of various parts of the equipment to ensure they meet specified requirements.

2. Perform maintenance and inspections according to the scheduled daily, weekly, and monthly check contents without missing any items.

3. Master the equipment maintenance content, quality standards, and safety technical measures to ensure maintenance quality and safety.

4. Place disassembled parts in designated locations without obstructing work or passage; ensure objects are placed securely.

When disassembling equipment, follow the predetermined sequence. For parts with fixed positions or specific matching marks, disassemble according to the markings.

1. When disassembling larger components, take reliable measures to prevent falling or slipping.

2. When disassembling components with elasticity, imbalance, or tendency to roll, implement safety protection measures.

3. When assembling or disassembling components, do not use brittle materials such as cast iron or cast copper, or materials harder than the components, as contact surfaces.

4. When opening covers, boxes, or changing oil during maintenance, cover them properly to prevent debris, water, etc., from entering.

5. When assembling rolling bearings, if preheating is not feasible, use soft metal for cushioning during hammering or pressing.

6. When changing or adding oil to equipment, ensure the type, purpose, and quality of the grease comply with regulations, and record relevant data.

1. Conduct comprehensive acceptance checks for equipment after maintenance. For equipment requiring barring, perform barring tests to check its condition.

2. The trial run of equipment after maintenance should be uniformly directed by the work supervisor, operated by the driver, with dedicated personnel monitoring key areas.

3. Assign dedicated personnel to monitor and address any issues promptly.

4. Equipment should undergo trial runs after the following maintenance tasks:

a) Repair or replacement of bearings;

b) Overhaul of motors, adjustment of rotor and stator gaps;

c) Track treatment in hoisting systems, replacement of sheaves, connecting devices, wire ropes, adjustment and maintenance of braking systems, overhaul of electrical systems and winch bodies;

d) Overhaul of main fans, replacement of blades, adjustment and maintenance of electrical systems;

e) Replacement of main components of water pumps;

f) Replacement of gears in reducers;

g) Other items specified in the maintenance manual requiring trial runs.

5. During trial runs, monitoring personnel should pay special attention to the following two points: 1. Temperature of rotating parts such as bearings;

1. Vibration of rotating and transmission parts, sound of rotation, and lubrication conditions;

2. When working at heights or in shafts, wear safety helmets and secure safety belts, which should be locked in reliable positions.

3. Parallel work above and below is strictly prohibited at heights and in shafts. If parallel work is necessary, develop reliable safety measures approved by the chief mine engineer and implement them strictly.

Prohibit individuals with abnormal blood pressure, epilepsy, or other conditions unsuitable for working at heights or in shafts from participating in such tasks.

System Functions:

1. User login and permission authentication;

2. The system includes 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 via VR controllers;

Supports users navigating the system using controllers.

Technology:

The system is developed using the Unreal Engine, leveraging PBR materials for realistic virtual reality rendering of underground working environments. Particle systems are used to simulate effects such as water spray and dust during operations.