本文選題：高地應(yīng)力 + FLACD��； 參考：《巖土工程學(xué)報(bào)》2016年S2期

【摘要】：深部地下試驗(yàn)室是未來(lái)人類開(kāi)采深部資源的基礎(chǔ),中國(guó)錦屏地下實(shí)驗(yàn)室是全世界埋深最深的地下實(shí)驗(yàn)室,錦屏地下試驗(yàn)室二期#8實(shí)驗(yàn)洞的建設(shè)或許涉及極深巖石力學(xué)研究方向,故擬在#8實(shí)驗(yàn)洞內(nèi)設(shè)計(jì)開(kāi)挖多個(gè)實(shí)驗(yàn)洞群以開(kāi)展原位力學(xué)測(cè)試及原理探索。然而,實(shí)驗(yàn)洞群的布置模式直接影響地下實(shí)驗(yàn)室的長(zhǎng)期穩(wěn)定特性。針對(duì)高地應(yīng)力賦存環(huán)境地下實(shí)驗(yàn)洞室群開(kāi)挖,建立了FLAC3D三維數(shù)值模型,對(duì)比研究了同側(cè)相鄰洞室不同間距和異側(cè)洞室不同布置工況下,后續(xù)洞室開(kāi)挖對(duì)已建洞室圍巖穩(wěn)定性的影響,并用位移變化值作為地下洞室群布置工況評(píng)價(jià)指標(biāo),判識(shí)開(kāi)挖對(duì)已建洞室的影響程度。結(jié)果表明:同側(cè)相鄰洞室間距8 m,異側(cè)洞室對(duì)稱布置為最優(yōu)布置工況。研究成果可直接指導(dǎo)錦屏地下實(shí)驗(yàn)室二期#8實(shí)驗(yàn)洞內(nèi)實(shí)驗(yàn)洞群的布置設(shè)計(jì),為其他高地應(yīng)力環(huán)境下洞室群布置提供參考。
[Abstract]:The deep underground laboratory is the basis of human exploitation of deep resources in the future. China's Jinping underground laboratory is the deepest underground laboratory in the world. The construction of #8 experimental hole in the second phase of the Jinping underground laboratory may involve the research direction of extremely deep rock mechanics. Therefore, several experimental caverns are designed and excavated in #8 Experimental Cave in order to carry out in situ mechanical testing and principle exploration. However, the layout of experimental caverns directly affects the long-term stability of underground laboratories. A 3D numerical model of FLAC3D is established for excavation of underground experimental caverns in high stress environment. The different spacing of adjacent caverns and different layout of caverns on the same side are compared and studied. The influence of the subsequent excavation on the stability of the surrounding rock of the existing cavern is evaluated by using the displacement variation value as the evaluation index for the working condition of the underground cavern group arrangement and the degree of influence of the excavation on the built cavern is identified. The results show that the spacing of adjacent caverns is 8 m, and the symmetrical arrangement of different caverns is the optimal condition. The research results can directly guide the layout design of experimental caverns in #8 experimental cave in the second phase of Jinping Underground Laboratory and provide reference for the layout of other caverns under high ground stress.
【作者單位】： 四川大學(xué)水利水電學(xué)院水力學(xué)與山區(qū)河流開(kāi)發(fā)保護(hù)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：四川省科技廳應(yīng)用基礎(chǔ)計(jì)劃項(xiàng)目(2015JY0045) 國(guó)家重點(diǎn)研發(fā)項(xiàng)目(2016YFC0600701)
【分類號(hào)】：TV223
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本文編號(hào)：2031820