Six systems for mines

     Emergency Evacuation System    

System characteristics:

:: Confined spaces to provide life support for persons in distress who cannot be evacuated in time in the event of an underground disaster or accident

:: The self-rescuer is rated for a protection time of not less than 30 minutes and is small and light enough to be carried by the person entering the well.

:: Emergency shelter facilities are equipped with basic functions such as safety protection, oxygen supply guarantee, hazardous gas removal, environmental monitoring, communication, lighting, personnel survival guarantee, etc., and have a rated protection time of not less than 96 hours in the absence of any external support.

:: The total capacity of each emergency shelter facility can meet the emergency shelter needs of all personnel in the area it serves in the event of a sudden emergency, including production personnel, management personnel and other temporary personnel that may be present, with a certain standby factor.

:: Emergency evacuation facilities can be connected to mine safety monitoring and control, personnel positioning, forced-air self-rescue, water-supply and rescue, communication and liaison systems to form a holistic underground safety evacuation system.

  • The compressed air curtain is a compressed air cylinder that releases a large amount of compressed air through the air outlets of the piping to drive out toxic and hazardous gases; it is designed to prevent toxic and hazardous gases from being brought into the refuge chamber with the entry of the evacuees.

  • Oxygen supply security system mainly includes pressurized air oxygen supply, compressed oxygen supply and self-rescuer.

    ①Pressurized air for oxygen supply

            The compressed air pipework in the refuge is connected to the main compressed air pipework in the mine, with an inlet pressure of 0.7mp and an outlet pressure of 0.2mp. Under normal operation of the mine's pressurized air system, compressed air is supplied to the refuge through a main switch (normally open ball valve), and then into the refuge via a pressure gauge, a pressure reducer, a pressure transducer, a silencer, a control valve, and an oil-water separator, an air filter, a pressure reducer, and a muffler. The pressure is displayed on a pressure gauge and the air is supplied to the chamber through a muffler. The other side of the air is fed to the air curtain spray system, which provides the air curtain and the spray airflow.

    ②Compressed oxygen supply

             In the event of a failure of the external compressed-air oxygen supply system, compressed oxygen is used to ensure that the refuge occupants can continue to survive in the limited space available. The compressed oxygen supply system is safe, reliable, simple to operate, easy to use, easy to maintain and inexpensive.


            The self-rescuer is small in size, light in quality, generates sufficient and even oxygen, less dust, stable in performance, low breathing resistance, low temperature of suction, etc., and realizes escaping from the disaster area within the effective time.

  • Air Purification: Air scrubbing and dehumidification systems are used to remove CO2 from the air that is breathed in by people in closed chambers over long periods of time.2The toxic and hazardous gases are released into the refuge through the use of CO2The catalyst is washed and filtered.

  • Temperature and humidity regulation system: The emergency shelter system has air conditioning facilities to control and regulate the temperature rise caused by heat sources from the external space and the body's own heat sources. The air conditioning system consists of an explosion-proof air-conditioning compressor, a freezer and a pneumatic fan. The temperature of the air inside the refuge is controlled to 33°C ± 2°C.

  • Main functions, components and main technical parameters of environmental monitoring

    It is used to collect and analyze ambient gases (O2, CO, CO2CH4The refuge is monitored for concentration, temperature, humidity and pressure. This allows the refuge occupants to understand and identify the disaster environment, and to organize self-rescue measures according to the condition of the equipment inside the refuge, in order to maximize the safety of the people in danger. In order to facilitate intrinsic safety and access to the user's existing system, the O-ring is installed in the refuge.2, CO, CO2CH4Sensors such as differential pressure, temperature, humidity, etc. and their sub-stations can be selected from the supporting equipment of the user's existing system.

  • The refuge is equipped with a direct telephone line to the mine's dispatch office and can be connected to the underground broadcasting system to ensure maximum communication security during a disaster. Personnel location monitoring substations and dispatch telephones can be installed as part of the user's existing system.

  • In order to create a good living environment for the evacuees and to ensure their health and safety, the refuge is equipped with chairs, stretchers, first aid kits, food, drinking water, toolboxes, fire extinguishers and signage.

  • Routine maintenance time frame: 6 months maintenance.

    Rated strength: 100/80/40 persons

    Rated protection time: 96h

    Start-up time: <30s;

    Continuous high temperature resistance: ambient temperature 35°C

    Observation window: 150mm in diameter

    Oxygen supply system: pressurized air oxygen supply system, compressed oxygen supply system, oxygen concentration 18.5%~23.0%

    Pressurized air system: Utilize the interface of the mine's pressurized air system. Pressure reduction, throttling, muffling, filtering (filtering out oil, water, etc.). The outlet pressure is 0.1-0.3MPae per capita air supply is not less than 0.3m/mine continuous noise is not more than 70dB(A)

    Transition room air curtain: air curtain spray time >2min/group; flow rate >100L/(min-person)

    Air purification and cooling dehumidification system: carbon dioxide absorption capacity>0.5L (min-person), carbon dioxide absorption capacity: from 400ppm to 24ppm within 20min, carbon dioxide≤1.0%, CO≤24ppm, CH4≤1.0% body temperature<33℃.

    Internal air circulation system: flow rate above 20L/min.

    Diagnostic indoor environmental monitoring parameters: CO, CO2, CH4, 02, temperature, humidity, differential pressure

    Transition room environmental monitoring parameters: CO, O2

    Dong outdoor environment monitoring parameters: CO, CO2, CH, 0, temperature

    Communication system: wired and wireless communication

    Food equipment: not less than 5000KJ/person-day, edible water 1500mL/person-day