煤矿冲击地压评价模型及其应用

Evaluation Model of Rock Burst in Coal Mine and Its Application

煤矿冲击地压评价指标具有多样性、随机性等不确定性,无法确定合理的指标权重,导致评价结果与实际偏差较大。针对上述问题,构建了以地质条件、安全管理、开采技术、其它因素为准则层,以开采深度、煤岩力学特性等24种因素为指标层的煤矿冲击地压评价指标体系;将“AHP(层次分析法)和熵权法”计算的权重进行融合,引入Lagrange函数,构建优化决策模型,通过欧氏距离函数,获得偏好系数,得到指标组合权重,构建CW-TOPSIS煤矿冲击地压评价模型,评判冲击地压等级。运用该模型判断龙煤矿业集团某煤矿冲击地压等级,评价等级为“弱冲击”,评价指标对冲击地压的影响程度由大到小为:煤岩力学特性>开采深度>顶板岩层结构特点>回采面推进到采空区、断层时间>顶板管理方法,评价结果与煤矿实际情况一致。CW-TOPSIS评价模型的评价结果与综合指数法等传统评价方法相比精度更高、更准确、更具实用性。

The evaluation index of coal mine rock burst has some uncertainties such as diversity and randomness,the scientific and accurate index weight can not be determined,and the evaluation result always deviates from the reality.In order to solve the above problems,an evaluation index system of coal mine rock burst was constructed,which takes geological conditions,safety management,mining technology,and other factors as criterion layer,and 24 factors such as mining depth and mechanical properties of coal and rock as index layer.The weights calculated by“AHP and Entropy weight method”are combined,and the Lagrange function is introduced to construct the optimal decision-making model.Through the Euclidean distance function,the preference coefficient is obtained,and the index combination weight is obtained.The evaluation model of rock burst in CW-TOPSIS coal mine is constructed,and the grade of rock burst is determined.The model was used to judge the rockburst grade of a coal mine in Long Coal Mining Group,and the grade is“weak impact”,and the calculated index combination weight was sorted,from large to small:mechanical properties of coal and rock>mining depth>roof strata structure characteristics>mining face advancing to goaf,fault time>roof management method.The evaluation result is consistent with the actual situation of the coal mine.Compared with the traditional evaluation method including,the comprehensive index method,the CW-TOPSIS evaluation model is more accurate,more precise,and more practical.