CAJ | 학술논문

采用地质调查、理论分析、数值模拟与工业性试验等方法,研究了弱面影响下深部倾斜岩层巷道变形特征.该类巷道非均称失稳机制主要包括弱面层间剪切破坏机制、高应力软岩扩容机制与弱面围岩失稳诱发机制.围岩首先沿弱面破坏,弱面层间剪切滑移变形引发邻近围岩破坏区扩展,局部围岩失稳加剧其他部位变形破坏,诱发巷道整体灾变失稳.弱面对巷道失稳起着诱导作用,维护巷道稳定的关键在于控制弱面层间剪切变形与弱面围岩失稳后软岩区域峰后承载阶段的持续变形.基于高强度高预应力控制原则、非均称控制原则与全断面控制原则,开发了以强力支护、弱面围岩加强支护、控制底鼓和二次支护为核心的分阶段动态控制技术,通过强化弱面及围岩整体强度与承载能力,控制巷道非均称变形,保持巷道长期稳定.
채용지질조사、이론분석、수치모의여공업성시험등방법,연구료약면영향하심부경사암층항도변형특정.해류항도비균칭실은궤제주요포괄약면층간전절파배궤제、고응력연암확용궤제여약면위암실은유발궤제.위암수선연약면파배,약면층간전절활이변형인발린근위암파배구확전,국부위암실은가극기타부위변형파배,유발항도정체재변실은.약면대항도실은기착유도작용,유호항도은정적관건재우공제약면층간전절변형여약면위암실은후연암구역봉후승재계단적지속변형.기우고강도고예응력공제원칙、비균칭공제원칙여전단면공제원칙,개발료이강력지호、약면위암가강지호、공제저고화이차지호위핵심적분계단동태공제기술,통과강화약면급위암정체강도여승재능력,공제항도비균칭변형,보지항도장기은정.
By adopting methods of geological survey, theoretical analysis, numerical simulation and industrial test, the paper has analyzed the deformation characteristics of roadway in deep inclined rock strata with weak plane. Moreover, the paper has revealed the asymmetric instability mechanism of such roadway, mainly including shear failure mechanism in weak plane, expansion mechanism of high stress soft rock and the inducement mechanism of surrounding rock instability of weak plane. Surrounding rock damage initially appears along weak plane. The shear-slip deformation in weak plane layer causes expansion of the failure zone of adjacent surrounding rock. The partial surrounding rock instability in-tensifies the deformation failure of other parts, which induces catastrophic instability of whole roadway. As weak plane plays an induction role in roadway deformation, the key for maintaining roadway stabil-ity lies in controlling the shear deformation in weak plane layer and the continuous deformation inpost-peak bearing stage in soft rock zone after the instability of weak plane surrounding rock. Based on high-strength and high pre-stress control principle, asymmetric control principle and whole section control principle, the author has developed a staged dynamic control technology which needs strong support, reinforced support for weak plane surrounding rock, heave floor control and secondary support as technical core. Through reinforcing the whole strength and bearing capability of weak plane and sur-rounding rock, the technology could control the roadway asymmetric deformation and maintain the long-term stability of roadway.