义马煤田冲击危险性地质因素指数评价法

Evaluation and application of the geological factor index of impact risk in Yima Coalfield

为了建立针对义马煤田地质条件的冲击危险性评价方法,借鉴综合指数法原理,分析确定了义马煤田冲击地压的8个主控地质因素,并对地质因素进行归一化分级、赋值,引入层次分析法(AHP)计算各地质因素权重,建立了基于义马煤田地质条件的冲击地压危险性综合指数计算模型。通过计算198个地质勘探钻孔的综合指数,并对比分析以往发生冲击事件区域的地质条件,确定了分区评级指标,并将义马煤田划分为无冲击危险区、弱冲击危险区、中等冲击危险区和强冲击危险区,并对分区结果进行了验证。基于AHP优化的冲击地压危险性地质因素指数评价模型针对性强,为义马煤田各矿从地质条件科学评价冲击地压危险性提供了一种新的方法,并为其他地区的冲击地压矿井建立针对自身条件的冲击危险性评价模型提供借鉴。

In order to establish the impact risk evaluation method according to the geological conditions of the Yima coalfield,and referring to the principle of the comprehensive index method,the eight main geological factors controlling the rockburst in the Yima coalfield were analyzed and determined,and the geological factors were normalized,classified and assigned.Analytic Hierarchy Process(AHP)was introduced to calculate the weight of each geological factor,and a comprehensive index calculation model of rockburst risk based on the geological conditions of the Yima coalfield was established.By calculating the comprehensive index of 198 geological exploration boreholes and comparing and analyzing the geological conditions in the areas where shock events occurred in the past,the zoning rating index was determined,and the Yima Coalfield was divided into no shock hazard area,weak shock hazard area,and medium shock hazard area,zone and strong impact danger zone,and the partition results were verified.The index evaluation model of rockburst risk based on AHP optimization was highly targeted,which provided a new method for scientifically evaluating rockburst risk from geological conditions of mines in Yima Coalfield,and provided a new method for rockburst risk in other areas.It provided reference for the mine to establish the impact risk assessment model according to its own conditions.