强采动巷道破碎顶板全长锚固案例分析  

Case Study on Full-length Anchoring of Broken Roof in Strong Mining

作　　者：郝英豪 韩昌良 刘计寒 杨厚强 白刚 宋凯 杨浩兴 魏民 HAO Yinghao;HAN Changliang;LIU Jihan;YANG Houqiang;BAI Gang;SONG Kai;YANG Haoxing;WEI Min(Zhongtian Hechuang Energy Co.,Ltd.,Ordos 017010,China;Key Laboratory of Deep Coal Resource Mining,Ministry of Education of China,School of Mines,China University of Mining and Technology,Xuzhou 221116,China;Yantai Vocational College,Yantai 264670,China;Shandong Yanzhou Coal Mining Heibao Mining Equipment Co.,Ltd.,Jining 273599,China)

机构地区：[1]中天合创能源有限责任公司,内蒙古鄂尔多斯017010 [2]中国矿业大学矿业工程学院深部煤炭资源开采教育部重点实验室,江苏徐州221116 [3]烟台职业学院,山东烟台264670 [4]山东兖煤黑豹矿业装备有限公司,山东济宁273599

出　　处：《煤炭技术》2024年第11期6-11,共6页Coal Technology

基　　金：国家自然科学基金面上资助项目(52274101);中国博士后科学基金资助项目(2019M652019)。

摘　　要：针对深井强采动大变形巷道修复加固问题,以葫芦素矿井21205辅运巷为工程背景,采用综合方法研究,分析了深井强采动大变形巷道顶板分区化破坏特征,形成了强采动巷道破碎顶板结构重建对策,针对性提出了厚层时效预应力全长锚固控制技术。强采动巷道破碎顶板由浅及里共划分3个分区。基于分区化破坏特征,形成了以“清除岩体碎裂扩容区”、“浅注岩体弱化裂隙区”、“深锚岩体弹性承载区”等相应手段来重建顶板承载结构。基于常规锚杆索加装新型锚注结构,实现先端锚预紧、后全锚承载的厚层预应力全长锚固,实现深浅部岩体协同承载。工程实践表明,巷道顶板表面及内部岩体稳定性较好,取得了良好的修复及支护效果。Aiming at the problem of repair and reinforcement of large deformation roadway in deep mine strong mining,take auxiliary haulage roadway 21205 in Hulusu coal mine as the engineering background to clarify the zoning damage characteristics of the roof of large deformation roadway in deep mine strong mining with the methods of field investigation,theoretical analysis and engineering practice.The reconstruction countermeasure for broken roof structure of strong mining roadway is formed,and the full-length anchoring control technology of time-effective prestress in thick circle is put forward.The broken roof plate of strong mining roadway is divided into 3 zones from shallow to deep.Based on the damage characteristics of the zoning,Formed the corresponding means to rebuild the roof bearing structure by"removing the fracture expansion zone of the rock body","shallow injection of the rock body to weaken the fissure zone",'deep anchoring of the elastic bearing zone of the rock body"and so on.Moreover,based on the conventional anchor ropes retrofitted with a new type of anchoring structure,it realizes thick prestressing full-length anchoring with apex anchor pre-tensioning and rear full-anchor bearing,and realizes of synergistic bearing of deep and shallow rock mass.The engineering practice proves that both the stability of the surface and internal rock mass of the roadway roof are good,showing good repair and support effect.

关 键 词：深埋 强采动巷道 破碎顶板 承载结构重建 全长锚固 

分 类 号：TD353[矿业工程—矿井建设]