Coal rock interface recognition method based on forward detection of ground penetrating radar

The research and application of coal-rock interface identification technology is an important part of the intelligent system construction of fully mechanized mining face. Through the automatic identification of coal-rock interface, the cutting height of shearer drum can be adjusted in time to avoid the problems of "under-cutting" and "over-cutting". At present, the research of coal-rock interface identification technology is widely carried out. This paper mainly proposes a coal-rock interface identification method based on ground penetrating radar. Considering the installation and identification accuracy of GPR under actual working conditions, the forward detection method of GPR is proposed. The GPR is installed on the coal mining machine and emits high-frequency electromagnetic waves in front of the coal wall. Due to the different dielectric constants of coal and rock, the characteristics of the received direct waves are also different. By comparing the characteristics, the cutting medium of the current sampling point can be determined, and the interface curve of coal and rock can be obtained by curve fitting.