摘要
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。
A view point is proposed that natural γ ray from the roof will decay after penetration into coal in weighted exponential function on the basis of actual working environment of a shearer. A prediction equation for identification of the interface between the rock and coal is given. The linear decay coefficient of coal seam is determined which is close to the actual parameter. Trials at site has shown that the accuracy is much improved as compared to the simple exponential function used previously. The maximum error was 50mm. This method is characterized by high accuracy and reliability in thin top coal condition. This technology is suitable for China where top coal is not left or a thin layer of top coal is left unmined. This provides theoretical foundation for developing sensor for identification of rock and coal interface.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
1996年第5期513-516,共4页
Journal of China Coal Society
基金
煤炭科学基金
关键词
采煤机
调高
煤岩界面
界面识别
Γ射线
传感器
horizon control of shearer, identification of coal and rock interface, natural γ ray
