Which of the following is NOT a matter that the mine gas monitoring system must provide for?

The matter that is not required of a mine gas monitoring system is the documentation of daily gas trends. While monitoring systems are essential for ensuring the safety of the mining environment and need to continuously assess gas concentrations and mine atmosphere, they do not have a specific mandate to document trends on a daily basis. The primary focus of such systems is on real-time monitoring and the ability to automatically detect hazardous gas concentrations, ensuring immediate response to dangerous situations.

Continuous monitoring helps to identify immediate changes in the atmosphere, thus prioritizing the safety of workers. Automatically detecting gas concentrations is a critical feature to prevent accidents by alerting personnel to unsafe conditions. Additionally, having a backup power supply ensures the continuous operation of the monitoring system, even in the event of a power failure. Therefore, while tracking trends may be beneficial for assessing longer-term safety data, it is not a strict requirement for compliance with mining safety regulations.