CAJ | 학술논문

针对深部岩体物理模型试验中存在的内部变形量测难题,采用透明岩体相似模拟试验新方法,利用自行研制的数字散斑相关变形量测技术,通过进一步对模型内部制斑方法展开实验研究,得到了非构造应力作用下深埋圆形软岩巷道围岩的内部变形与破裂规律.研究结果表明:1) 提出的透明岩体人工填充式制斑方法能够有效保障数字照相变形量测的实施与精度;2) 不同埋深下,围岩的径向位移与其距巷道表面的距离大体呈指数衰减关系;3) 围岩的宏观裂纹数目、总长、破裂区域宽度与其埋深呈指数增长关系,而破裂分形维数则与埋深呈线性增长关系;4) 巷道两帮及对角线处的浅部岩体为重点锚喷支护与注浆加固区,同时,应采用桁架、格栅等构件形成封闭支护结构和有效承载环,防止巷道发生滑动失稳破坏.
침대심부암체물리모형시험중존재적내부변형량측난제,채용투명암체상사모의시험신방법,이용자행연제적수자산반상관변형량측기술,통과진일보대모형내부제반방법전개실험연구,득도료비구조응력작용하심매원형연암항도위암적내부변형여파렬규률.연구결과표명:1) 제출적투명암체인공전충식제반방법능구유효보장수자조상변형량측적실시여정도;2) 불동매심하,위암적경향위이여기거항도표면적거리대체정지수쇠감관계;3) 위암적굉관렬문수목、총장、파렬구역관도여기매심정지수증장관계,이파렬분형유수칙여매심정선성증장관계;4) 항도량방급대각선처적천부암체위중점묘분지호여주장가고구,동시,응채용항가、격책등구건형성봉폐지호결구화유효승재배,방지항도발생활동실은파배.
In the physical model test of deep rock, the measurement on the internal deformation and rupture is a challenge. In order to solve the problem, based on the transparent rock simulation experi-ment, the digital speckle correlation deformation measurement method has been adopted and the spot methods have been further studied. On the basis, spatio-temporal evolution law of the internal defor-mation and rupture in deep circular tunnels without tectonic stress has been obtained. The conclusions are as follows: 1) the artificial filling spot method of transparent rock presented in this article could guarantee the implementation and accuracy of digital photographic deformation measurement; 2) under different buried depths, the radial rock displacement at the roof, bottom and two sides is in an exponen-tial attenuation relationship with the distance from the roadway surface; 3) the number and overall length of macroscopic crack as well as the width of failure zone are in an exponential growth relation-ship with the depth, and the rupture fractal dimension satisfies linear growth condition with the depth; 4) under the tectonic stress, the shallow rock in the two diagonals should be key supporting parts around deep circular roadway. In addition to spraying anchor supporting of roadway, grouting reinforcement is necessary to the shallow rock in two sides and diagonal. The supporting structure around the tunnel should be linked into a unified whole unit by truss and grilling, forming an effective bearing ring to prevent sliding instability failure of roadway.