厚顶煤巷道顶帮整体锚固支护体系研究与应用  

Research and application of whole anchorage support system in roof and two sides of thick top coal roadway

作　　者：单仁亮[1] 鲍永生 原鸿鹄[1] SHAN Renliang;BAO Yongsheng;YUAN Honghu(School of Mechanics and Civil Engineering,China University of Mining ＆ Technology（Beijing） ,Beijing 100083 ,China;Mafiliang Mine, Datong Coal Mine Group Corporation Ltd., Datong 037027, China)

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083 [2]大同煤矿集团有限责任公司马脊梁矿,山西大同037027

出　　处：《煤炭科学技术》2018年第4期93-99,共7页Coal Science and Technology

摘　　要：针对深部应力作用及常规支护条件下厚顶煤矩形断面巷道围岩变形量大的问题,分析主要原因是巷道肩部围岩裂隙发育,顶帮锚固体相互独立,支护结构松散。从厚顶煤巷道围岩失稳破坏机理出发,采用FLAC3D数值计算,对顶帮整体锚固支护体系及传统锚固支护的支护预应力场分布特征及巷道围岩变形破坏规律进行了对比分析。结果表明,顶帮整体锚固支护体系能够改善肩部围岩为挤压式传力机制,抑制肩角处围岩剪切裂隙的产生和发育,增强顶帮围岩在空间上的相互支撑作用,有效提高围岩自承能力,防止厚顶煤巷道发生冒顶、片帮等非线性大变形现象。现场应用表明,采用顶帮整体锚固支护体系后,巷道顶板最大下沉量为50 mm,两帮移近量最大为100 mm,支护效果良好。According to the problem that low strength surrounding rock of rectangular section roadway with thick top coal showed large deformation under high stress and conventional support,fractures are developed in the shoulders due to the independent anchorage body in roof and two sides which shows a loose support structure.According to the failure mechanism of roadway with thick top coal,its support prestressed field and deformation characteristics are comparatively analysed by FLAC3 Dnumerical simulation with the support of the whole anchorage body in roof and two sides and the independent one.The results show that with the support of whole anchorage structure in roof and two sides,compressive force transfer mechanism appear and initiation and development of fractures are restrained in the surrounding rock of shoulders,the surrounding rock in roof and two sides can support each other better which enhanced theirs self-supporting capability and the nonlinear deformation like roof fall and rib spalling are prevented.Field application demonstrates that whole anchorage structure in roof and two sides achieve practical supporting effect.

关 键 词：厚顶煤巷道 整体锚固支护体系 围岩稳定性 破坏机理 

分 类 号：TD353[矿业工程—矿井建设]