煤巷围岩稳定性影响评价指标与分类研究  

Research on the impact evaluation index and classification of the surrounding rock stability of coal roadway

作　　者：杜忻刚 吕坤 贾明琦 Du Xingang;Lv Kun;Jia Mingqi(Hunchun Mining(Group)Baliancheng Coal Industry Co.,Ltd.,Hunchun 133300,China;China Coal Research Institute,Beijing 100013,China;State Key Laboratory of Coal Mine Disaster Prevention and Control,Beijing 100013,China;Beijing Engineering and Research Center of Mine Safe,Beijing 100013,China)

机构地区：[1]珲春矿业(集团)八连城煤业有限公司,吉林珲春133300 [2]煤炭科学技术研究院有限公司,北京100013 [3]煤矿灾害防控全国重点实验室,北京100013 [4]北京市煤矿安全工程技术研究中心,北京100013

出　　处：《煤炭与化工》2025年第4期7-13,共7页Coal and Chemical Industry

摘　　要：为科学定量评价八连城煤矿19号煤层巷道围岩稳定性,采用现场实测、理论分析、实验室实验和数值模拟等综合方法,分析了巷道围岩地质结构特征、围岩物理力学性质以及围岩应力状态,获得了巷道顶板强度、底板强度、煤层强度、巷道埋深、直接顶初落步距、护巷煤柱宽度、采动影响系数和应力比值8个主要影响因素,提出了巷道围岩稳定性分类综合指数法,结合缓斜和倾斜煤层回采巷道围岩稳定性分类结果,综合评价了巷道围岩稳定性。研究结果表明:19煤巷道围岩稳定等级属于Ⅲ类,即中等稳定围岩。In order to scientifically and quantitatively evaluate the stability of roadway surrounding rock of No.19 coal seam in Balancheng Mine,the geological structure characteristics,physical and mechanical properties and stress state of surrounding rock of roadway surrounding rock were analyzed by comprehensive methods of field measurement,theoretical analysis,laboratory experiment and numerical simulation.Nine main influencing factors including roof strength,floor strength,coal seam strength,tunnel buried depth,initial fall distance of direct roof,ratio of direct roof thickness to mining height,width of roadway protection coal,mining influence coefficient and stress ratio were obtained.A comprehensive index method was proposed for the stability classification of roadway surrounding rock,combining the classification results of roadway surrounding rock stability of gently inclined and inclined coal seam.The stability of roadway surrounding rock was evaluated comprehensively,and the roadway support scheme was optimized based on the classification results.The research results showed that the surrounding rock stability grade of No.19 coal mine roadway belonged to class Ⅲ,that was,medium stable surrounding rock.

关 键 词：地质结构特征 物理力学性质 影响因素 应力状态 围岩稳定性分类 综合指数法 

分 类 号：TD322[矿业工程—矿井建设]