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根据采煤机实际工作环境，提出了顶板自然ｒ射线在穿透顶煤后按加权指数函数衰减的观点，在此基础上导出了指导煤岩界面识别的测报方程，提出通过３次标定确定煤层的线衰减系数，更接近实际参数。现场实验表明，提出的方法与以往基于简单指数衰减函数的测报方法相比精度大为提高，实验中出现的最大误差为５０ｍｎ，同时，该方法具有在薄顶煤条件下测报精度高、可靠的特点，适合我国不留顶煤或少留顶煤的采煤工艺要求。为开发适合我国煤矿使用要求的煤岩界面识别传感器提供了理论依据。
According to the actual working environment of shearers, the viewpoint that the natural r-ray of the roof decays according to the weighted exponential function after penetrating the top coal is proposed. Based on this, the measurement equation of the coal-rock interfacial interface is deduced. The coal seam The line attenuation coefficient, closer to the actual parameters. The field experiments show that the proposed method is more accurate than the conventional method based on the simple exponential decay function. The maximum error in the experiment is 50mn. Meanwhile, this method has the advantages of high accuracy and reliability Characteristics, suitable for our country without top coal or less coal top coal mining process requirements. It provides a theoretical basis for the development of coal-rock interface identification sensor suitable for the coal mine in China.