Dynamic information perception and emergency isolation system for mine fire environment
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摘要: 火灾区域隔离是有效控制火灾发展和蔓延的主要方法，能够切断次生事故的反应链，缩小火灾影响范围。针对常用的火灾密闭隔离措施无法对密闭环境进行实时动态监测及预报的问题，设计了矿井火灾环境信息动态感知与应急隔离系统。在预先判定的危险区域布置监测节点，通过多参数传感器和红外摄像仪对多个测点的环境信息进行同步采集并传输至地面监控平台。当监测到异常数据时，系统报警并通过远程控制方式控制密闭隔离装置开启，实现密闭囊袋充填，囊袋通过预设滑轨传动系统从存储仓扩展至整个断面，实现应急密闭隔离。通过高精度压力传感器对囊袋内部气压进行实时监测，当囊袋内部压力低于安全范围下限时，启动囊袋自动补气装置，为囊袋补充气量；当内部压力达到设定范围上限时，自动停止充气，以提升密闭效果。现场试验结果表明，该系统实现了火灾环境参数实时采集和报警、密闭隔离装置远程控制等功能，密闭囊袋可在5 min内完成开启，停止充气后，囊袋内部压力基本保持稳定，满足现场应用要求。Abstract: Fire area isolation is the main method to effectively control the development and spread of fire, which can cut off the reaction chain of secondary accidents and reduce the scope of fire impact. In order to solve the problem that the commonly used fire airtight isolation measures cannot provide real-time dynamic monitoring and forecasting of the airtight environment, a dynamic information perception and emergency isolation system for mine fire environment is designed. The monitoring nodes are arranged in the predetermined dangerous areas, and the environmental information of multiple measuring points are collected and transmitted to the ground monitoring platform through multi-parameter sensors and infrared cameras. When abnormal data is detected, the system alarms and controls the airtight isolation device to open through remote control to realize the airtight bag filling. The bag is expanded from the storage bin to the entire section through the preset slide rail drive system to realize emergency airtight isolation. Real-time monitoring of the internal air pressure of the bag is carried out through high-precision pressure sensors. When the internal pressure of the bag is lower than the lower limit of the safety range, the automatic air-filling device of the bag is activated to replenish the air volume of the bag. When the internal pressure reaches the upper limit of the set range, the device automatically stop inflation to enhance the airtight effect. Field test results show that the system achieves the functions of real-time collection and alarm of fire environment parameters, remote control of airtight isolation device, etc. The airtight bag can be opened within 5 min, and the pressure inside the airtight bag remains basically stable after stopping inflation, which meets the requirements of field applications.
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