Specification,classification and grading evaluation index for smart longwall mining face

There is no unified standard for smart longwall mining face in China,and it is impossible to carry out scientific and reasonable quantitative evaluation on intelligent construction and development level of longwall mining face.The research on the classification,grading and evaluation index system of smart longwall mining face is carried out,the definition of smart longwall mining face is given,the mathematical model of the index system of smart longwall mining face is established,and the classification,grading evaluation index system and evaluation method of smart longwall mining face are put forward. The software of smart longwall mining face classification and grading evaluation is developed,and the scientific rationality of evaluation method and results is verified with specific cases. Firstly,some terms such as smart longwall mining face,intelligent centralized control center of mining face,intelligent mining mode and so on are defined,and the general technical requirements and system mating conditions of smart longwall mining face are put forward. According to the coal seam thickness,occurrence conditions,mining methods and mining technical parameters, the mining mode of smart longwall mining is classified. It can be divided into three modes: thin coal seam and medium thick coal seam intelligent patrol unmanned operation,thick coal seam human machine environment intelligent coupling high-efficiency comprehensive mining,and fully mechanized caving face intelligent operation and artificial intervention auxiliary caving. Secondly,taking the coal seam occurrence condition as the basic index and the mining technical parameters as the reference index,the intelligent classification and evaluation standard of longwall mining face is established,and the mining conditions of longwall mining face are divided into class I,class II and class III. According to the classification evaluation results of mining face,the smart longwall mining face system is divided into 14 subsystems: intelligent cutting coal,intelligent support,intelligent transportation,intelligent control,network communication,intelligent video,intelligent spray,intelligent supply,intelligent inspection,intelligent power supply,mining face lighting,mining face voice,ventilation,fire prevention and safety monitoring. The conditions of reaching the standard and the operating conditions of the equipment are evaluated. The grading evaluation standard for different types of smart longwall mining faces is established. The smart longwall mining faces are divided into three levels:advanced,intermediate and primary,and the development level of smart longwall mining face is comprehensively evaluated. Finally, taking a specific longwall mining face as an example,the paper analyzes the related indexes of smart longwall mining face,and verifies the rationality and scientific of the evaluation index system and evaluation method.