动压煤巷群围岩分区劣化特征及控制技术研究  

Partition deterioration feature and control technology of surrounding rock of dynamic pressure coal roadway group

作　　者：高晓君 杨征 郭超奇 丁彦雄 李安宁 GAO Xiao-jun;YANG Zheng;GUO Chao-qi;DING Yan-xiong;LI An-ning(Shaanxi Xiao Bao Dang Mining Co.,Ltd.,Yulin 719000,China;Shaanxi Huangling No.2 Coal Mine Co.,Ltd.,Huangling 727307,China)

机构地区：[1]陕西小保当矿业有限公司,陕西榆林719000 [2]陕西黄陵二号煤矿有限公司,陕西黄陵727307

出　　处：《煤炭工程》2021年第5期102-106,共5页Coal Engineering

基　　金：国家自然科学基金地区科学基金项目(51564044);江苏省“青蓝工程”资助项目(JSQL20140207)。

摘　　要：基于黄陵二号矿工程地质条件及围岩变形量大现状,采用理论分析及现场测试法,分析双翼开采条件下煤巷群围岩裂隙演化规律,提出巷道围岩分区劣化指标W,研究煤巷群围岩分区劣化特征及影响因素,制定了煤巷群分区加固技术方案。结果表明煤巷群围岩呈现出明显分区劣化特征,即裂隙三区:浅部裂隙极度发育区、中部微裂隙区及深部原岩区;针对性提出支护三区:浅部支护区(0~2m),中部控制区(2~5m)及深部承载区(5m以上,特别是6~8m)配合关键部位提前补强加固。工业试验表明该技术方案可有效保证煤巷群稳定。Based on the engineering geological conditions and the large surrounding rock deformation of Huangling No.2 Mine,the theoretical analysis and field test are carried out to analyze the evolution law of surrounding rock fissures of coal roadway under double-wing mining,and the partition deterioration index of surrounding rock of roadway is proposed.The partition deterioration feature and influencing factors of coal roadway group surrounding rock are studied,and the partition reinforcement time-sharing reinforcement technology of coal roadway group is formulated.The results show that,surrounding rock of the coal roadway group shows obvious partition deterioration feature,namely the three zones of fissures:the extreme development zone of shallow fracture,the middle micro-fracture zone and the deep original rock zone;the three zones of support is proposed,including shallow support zone(0~2 m),the central control area(2~5 m)and the deep bearing area(5 m or more,especially 6~8 m),and the key parts are strengthened in advance.Industrial tests show that,the technological scheme can ensure the stability of the coal roadway group.

关 键 词：煤巷群 分区劣化 裂隙区 巷道支护 围岩控制 

分 类 号：TD353[矿业工程—矿井建设]