综放煤矸低水平自然射线的涨落规律及测量识别分析

为研究综放开采煤矸的自动识别问题，提出了采用煤矸自然射线识别方法对放顶煤过程中放煤口的混矸进行测定识别，为此理论分析了矸石中低水平自然射线的涨落规律及测量时间对探测计数误差的影响，确定了放射性识别阈值及其精确判断阈值，通过实验的方法对矸石低水平自然射线的涨落规律及阈值进行了验证，确定了仪器的实时响应特性，研究结果为利用自然射线技术进行综放放煤口矸石出现的判断识别提供了依据，为综放工作面自动化放顶煤技术提供基础。

Measurement analysis on the fluctuation characteristics of low level natural radiation from gangue

In order to automatically identify the gangue mixed in the top-coal caving when it is drawn，the method of natural radiation was put forward.Then the flutuation of low level nature radiation radiated by gangue and the relationship between measure time and counting rate were analyzed theoretically to conform the radiate identification threshold and the accurate judgment threshold.In addition，several experiments were conducted to demonstrate all these thresholds，by which the real response characteristic was proved synchronously.All these were provided as a basis for identifying the gangue mixed in the top-coal caving by the natural radiation identification technology.