CAJ | 학술논문

高地应力软岩巷道地应力比较大，如果采用常规的支护技术无法满足巷道支护的要求，会造成巷道多次返修以及相应的安全隐患。基于大型有限元ABAQUS软件，建立高地应力卸压巷道控制技术有限元分析模型，应用Drucker-Prager岩体模型，分别分析了卸压巷道在不同位置、不同开挖顺序、不同相对距离等条件下保护巷道围岩体的应力应变。分析结果表明：布置了卸压巷道能明显改善高地应力巷道周围的应力集中，有利于巷道整体结构的稳定性。得出结论：①先开掘卸压巷道再开掘主巷道；②距离主巷道4m左右支护效果最佳；③需要针对不同的来压方向选择卸压巷道相对位置等。模拟结果可为同类高地应力巷道支护设计提供一定参考作用。
고지응력연암항도지응력비교대，여과채용상규적지호기술무법만족항도지호적요구，회조성항도다차반수이급상응적안전은환。기우대형유한원ABAQUS연건，건립고지응력사압항도공제기술유한원분석모형，응용Drucker-Prager암체모형，분별분석료사압항도재불동위치、불동개알순서、불동상대거리등조건하보호항도위암체적응력응변。분석결과표명：포치료사압항도능명현개선고지응력항도주위적응력집중，유리우항도정체결구적은정성。득출결론：①선개굴사압항도재개굴주항도；②거리주항도4m좌우지호효과최가；③수요침대불동적래압방향선택사압항도상대위치등。모의결과가위동류고지응력항도지호설계제공일정삼고작용。
Because of the large geo-stress of soft rock roadway with high stress,the conventional support technology can not meet requirement of roadway support,resulting in many times of tunnel maintenance and the corresponding security risks. Based on ABAQUS software,the finite element analysis model for high stress relief roadway control technology is established. Drucker-Prager model of rock is adopted to analyze respectively the stress and strain in protecting roadway surrounding rocks of pressure-relief tunnel in different location,different excavating sequences and different relative distances. The results show that the pressure-relief roadways can significantly improve the stress concentration around the roadway with high stress, which is conducive to keep the stability of roadway structure. The conclusion is:1) pressure relief tunnel is firstly excavated,followed by the main tunnel,2) the optimal supporting locates at 4m from the main tunnel,and 3) different relative position of pressure-re-lief tunnel is selected for different direction of pressure arrival. The simulation results provide a reference for the design of simi-lar high-stress roadway.