基于层次分析法的宁正矿区大埋深煤层冲击地压主控因素研究

Main control factors of rock burst for deeply buried coal seams in Ningzheng mining area based on analytic hierarchy process

工作面在掘进过程中不同的因素对冲击地压的作用不一样。为了探索深部开采条件下,影响冲击地压显现的各种因素,以某矿大巷掘进工作面为研究背景,对主要影响因素进行了分析,并利用层次分析方法对其进行了权重的确定,研究结果表明,开采深度、煤层厚度、褶曲构造及坚硬覆岩对大巷区域的冲击危险性有明显的影响,其中褶曲构造和坚硬覆岩的影响尤为显著。对工作面区域进行划分,以层次分析法(AHP)为基础,建立了一套冲击矿压影响因子权重评价体系,从而识别出各个区域的影响因子之间的权重差异。在确定了各个地区的主控因素之后,用大巷开挖时的各区域微震资料来验证结论,经过检验,微震资料和结果高度一致,由此证实了本论文的论点。结果对煤矿冲击风险定量评估具有一定的借鉴意义。

Different factors have different effects on rock burst during excavation.In order to explore various factors that affect the behavior of rock burst under deep mining conditions,the main influential factors were analyzed regarding the main roadway excavation face of a certain coal mine as the research background,and their weights were determined using the analy-tic hierarchy process.The research results showed that:Mining depth,coal seam thickness,fold structure,and hard overlying rock have a significant impact on the risk of rock burst in the main roadway area,the influence of fold structure and hard overlying rock is particularly significant.Based on the analytic hierarchy process(AHP),a set of weight evaluation system for rock burst impact factors was established to identify the weight differences between the impact factors in each region by dividing the working face areas.After determining the main control factors for each region,the conclusions were verified using microseismic data from each region during roadway excavation.After testing,the microseismic data and the results were highly consistent,which confirmed the argument of this paper.Our paper has certain reference significance for quantitative assessment of coal mine impact risk.