Development status and tendency of automatic identification technologies of coal-rock interface

On the basic of identification accuracy, identification speed and application scope of automatic identification technologies of coal-rock interface, some feature types of the technologies were analyzed; development status, characteristics and problems of non-contact and contact automatic identification technologies of coal-rock interface were discussed. Development tendency of automatic identification technologies of coal-rock interface were put forward. The paper provides new idea for further research of automatic identification technologies of coal-rock interface.