瓦斯突变预警上限值确定方法的研究

Research of determination method of upper limit value of gas mutation pre-warning

针对现有煤矿安全监控系统采用超限原理,以瓦斯传感器测量值为判断依据,无法及时发现预定报警值以下范围内瓦斯异常变化的问题,提出了一种不超限瓦斯突变预警方法,介绍了静态预警和动态预警两种不超限瓦斯突变报警方法。结合余吾煤业N2202工作面探头数据,分别对不超限瓦斯突变预警基础数据的静态数据和动态数据进行了分层抽样及分布的验证和拟合,得出静态预警和动态预警的基础数据基本符合正态分布的结论。提出采用假设检验和区间估计等实时计算静态预警和动态预警上限值的方法,并采用N2202工作面探头数据进行了验证。

For problem that abnormal gas change below pre-set warning value cannot be found in time because existing safety monitoring and control systems of coal mine use overrun theory and take measured value by gas sensors as criterion, the paper proposed a pre-warning method for gas mutation below the pre- set limit value, and introduced two gas mutation pre-warning methods named static pre-warning and dynamic pre-warning. It did stratified sampling as well as distribution validation and fitting of static data and dynamic data of pre-warning basic data of gas mutation below the limit value according to probed gas data of N2202 working face of Yuwu Coal Mine, and got a conclusion that the basic data distribution of the static pre-warning and dynamic pre-warning is both in normal distribution. It also proposed a method to real-timely calculate upper limit value of the static pre-warning and dynamic pre-warning with hypothesis testing and interval estimation, which was verified by use of probed gas data of N2202 working face.