Abstract: Determination of abnormal weighting risk zones is a prerequisite for implementing measures to prevent abnormal weighting. In this paper, on the basis of statistical analysis of factors inducing abnormal weighting in fully-mechanized sublevel caving face, the factors for risk evaluation of abnormal weighting were selected, and risk index was used to characterize risk level of abnormal weighting in coal face. In addition, risk evaluation model of abnormal weighting in fully-mechanized sublevel caving face was established, and the system for abnormal weighting risk evaluation was developed using a modern programming language. An application example was presented in one coal mine of Shandong province; the results agree well with the practice. A new method is provided for risk evaluation of abnormal weighting in fully-mechanized sublevel caving face.

Key words: abnormal weighting, evaluation system, fully mechanized sublevel caving face, risk index