Evaluation of the effect of water infusion of coal seams based on drifting degree and uncertainty measurement model

Abstract

The effect of water infusion of coal seams has a direct influence on the disaster prevention and mitigation and efficient production in mines.Uncertainty measurement theory integrated with combined weighting of drifting degree is applied to establish the drifting degree-uncertainty measurement model in order to evaluate the effect of water infusion of coal seams accurately.The uncertainty measurement function of each index is established by using the uncertainty measurement theory which can get the matrix of single index measurement evaluation.Then the weight coefficients are allocated by using the drifting degree to obtain a more accurate combined weight.Finally,on the basis of credible recognition criterion,the gradings of the effect of the projects were judged with the evaluation vector of multi-indexes comprehensive measurement evaluation,and the evaluation results were refined by the expected value and measurement of the sample’s grade.Taking the engineering project of water infusion of the coal seam of the working face as an example,the effect is compared with other evaluation methods and the results show that the method in this paper is more consistent with practical situation.This model surmounts the influence of some uncertainty information such as the index grade’s interval dividing and the allocation of weight coefficient on the evaluation.This method provides a new reference for evaluating the effect of water infusion of coal seams.

Keywords

• coal seam water infusion
• uncertainty measurement
• drifting degree
• combined weight