中文摘要：

为评价大倾角煤层采空区上方岩层安全性,本文分析了大倾角煤矿区地质特点和安全性影响因素,考虑了时间效应和空间演化,建立了包括历史信息、动态信息和目前信息等三类信息共七个影响因子的安全性评价指标体系;利用信息扩散原理构建概率分配函数,结合D-S证据推理,建立了大倾角煤层采空区顶板岩层安全性评价的二次融合模型。通过对某矿山具体实例的计算,验证了二次融合安全性评价模型是合适的。该方法对相似地质条件的矿山采空区安全性评价具有借鉴作用。

英文摘要：

In order to evaluate the top rock safety of steep coal-goaf,time effects and spatial evolution are taken into account in this paper and a stability evaluation index system is established,which covers three kinds of information on historical information,dynamic information and current information,respectively,and a total of seven impact factors based upon analyses of geological characteristics and influencing factors on the steep coal mining area. A top rock safety evaluation model of steep coal-goaf is also built through secondary information fusion combining the principle of information diffusion（ to construct the probability distribution function） with the D-S-based theory. A mine is taken as a pratical example and the results show that the secondary information fusion model is adapted to the safety evaluation model of steep coal-goaf and also provide valuable reference to the mine evaluation with similar geographical environment.