▎ 摘　　要

NOVELTY - The system (100) has a FBG chemical sensor (101), a processor (102), a computer readable medium (104), a display (106), a user interface (108), an Internet-of-things (IOT) device (110), a communication network (112) and a memory communicatively coupled to the processor. The processor sends a data, identified by the FBG chemical sensor, to a user. The user monitors the value of the gases based on the data in real time through mobile applications or some other web platform. The FBG goes under test of Annealing process to dry reduced graphene oxide (rGO). Annealing process involves heating steel to a specified temperature and cooling at a very slow and controlled rate. Real-time leakage detection and toxicgases in underground mines are identified based on Rapidly swept measurements of said temperature reflectance or transmittance spectrograms. USE - System for monitoring underground mines using FBG chemical sensor in coal-based industries such as coal washeries, coke oven plants, coal fired thermal power plants and steel plants. ADVANTAGE - The user is able to see the status in real time through mobile applications or some other web platform. The system provides high sensitivity with the use modified FBG coated with reduced graphene oxide. DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram illustrating the system for monitoring underground mines using the FBG chemical sensor. System for monitoring underground mines (100) FBG chemical sensor (101) Processor (102) Computer readable medium (104) Display (106) User interface (108) IOT device (110) Communication network (112)