基于模糊综合评判的冲击地压危险性分区预评价技术研究

摘要

In order to solve the difficult problem that the zoning pre|evaluation is inaccurate for rock burst risk on the working face of coal mining, an evaluation model of rock burst risk was established by using the fuzzy comprehensive evaluation method.Through simulating the mining process on the working face, the influence factors of coal body stress in different zones were analyzed comprehensively to evaluate the rock burst risk, and the zoning pre|evaluation of rock burst risk on the working face of coal mining was realized.Seven major influencing factors affecting the risk grade of rock burst were determined according to the experts' field experience and experimental results, then the weight of each factor was determined by using AHP.The evaluation model was applied on 3105 working face of a certain coal mine in Shandong, and seven high risk zones and four moderate risk zones were obtained.The evaluation results were basically consistent with the practical situation on site, which proved that the model is reasonable and feasible.%为解决采煤工作面冲击地压危险性难以准确分区预评价的难题,运用模糊综合评判法建立冲击地压危险性评价模型,模拟工作面开采过程,对工作面开采过程中不同区域煤体应力影响因素进行综合分析,评判冲击危险性,实现了采煤工作面冲击危险性分区预评价.根据专家现场经验和试验研究结果,确定了影响冲击地压危险性等级的7个主要影响因素,采用层次分析法,确定各个因素的权重.评价模型在山东某煤矿3105工作面进行了应用,得到7个高度危险区,4个中度危险区,评价结果与现场实际基本吻合,表明该模型是合理可行的.