The Application of Unascertained Measure Model to The Safety Evaluation of Bofang Coal Seam-roof Stability

Based on the unascertained theory, the paper elaborated exhaustively the modeling processes of the unascertained measure model. Combined with the unascertained measure model, the safety factors affecting coal seam-roof stability are analyzed and evaluated According to the reality of Bofang coal seam-roof stability, we can collect the measured data, determine the safety evaluation index, calculate for example by using the model, and evaluate the safety level of coal seam-roof stability lying in six points of the third coal in Bofang coal-mine. The result is found to be in accordance with the reality, after it is verified The method is designed to enhance the effectiveness of coal seam-roof stability safety evaluation, as provided the proper safety measures basis for the departments concerned.