针对深井大型硐室厚坚硬底板底鼓难题,以千米深井唐口煤矿绞车房硐室为工程实例,研究底板破坏机理:深井大型硐室厚坚硬底板开挖初期表现出明显的分层屈曲损伤破坏特征,随后在高应力作用下沿损伤破坏面滑移错动鼓起;以薄板屈服理论推导了底板屈曲破坏临界载荷。以控制厚坚硬底板的屈曲损伤破坏为出发点,基于硐室底板整体加固控制原则,提出了底板组合桩基群加固治理技术:以反底拱技术为基础,借助底板横向组合钢梁及双层链接钢筋网,辅以混凝土整体浇筑组合形成底板强基础梁结构,均衡底板受力,防止局部地点高应力集中;以高预应力锚索束和高压封闭注浆技术胶结加固围岩形成底板组合桩结构,阻断围岩应力向底板传递和转移;最终形成多排锚索束张拉强基础梁的组合桩基群结构,现场应用效果良好。研究成果对于当下日益加深的深部大型硐室及大型地下空间支护具有一定的指导和借鉴意义。 Aiming at the hard bottom plate drum problem of large-scale deep chamber large chamber, taking the mine shaft chamber of Tangkou coal mine in the depth of 1000 meters as an example, the failure mechanism of the bottom plate is studied. The early stage of deep hard floor excavation of deep chamber shows obvious stratified buckling damage Then, under the action of high stress, the sliding buckle is swept up and down along the damage and failure surface. The critical load of the buckling failure of the bottom plate is deduced by the yield theory of the sheet. In order to control the damage and damage of thick and hard plate as a starting point, based on the principle of overall reinforcement and control of chamber floor, the paper puts forward the reinforcement and treatment technology of combined plate pile group: based on the anti-under-arch technique, , Combined with the overall pouring of concrete to form a strong foundation beam floor structure, equalizing the floor stress, to prevent local high stress concentration; with high prestressed anchor cable bundle and high pressure grouting technology to consolidate the surrounding rock to form a combination of floor pile structure, resistance The surrounding rock stress is transferred to and transferred to the bottom plate; finally, the combined pile group structure with multi-row anchor cable bundle tensioned foundation beams is formed, and the field application effect is good. The research results have some guidance and reference for the deepening deep large-scale large-scale underground chamber and large-scale underground support.