CAJ | 학술논문

采矿时隧道开挖会对地下环境造成危害，同时其引起过大的地表沉降也会对地表造成危害。本文以重庆永荣矿业有限公司丰盛一矿开采工程为背景，运用有限元数值模拟软件MIDAS/GTS建立隧道断面开挖的数值模型，计算隧道开挖引起的地表沉降量。结果表明，随着埋深的增大，围岩破坏程度渐进扩大趋势，同时地表沉降量先减小后增大。在岩性较差的地层进行隧道的开挖，容易引起周围岩体的扰动，在强度相差较大的地层交界处其影响达到最大，进而出现大的变形或破坏；但如果交界的两个地层岩性相同或相近，则影响较小。
채광시수도개알회대지하배경조성위해，동시기인기과대적지표침강야회대지표조성위해。본문이중경영영광업유한공사봉성일광개채공정위배경，운용유한원수치모의연건MIDAS/GTS건립수도단면개알적수치모형，계산수도개알인기적지표침강량。결과표명，수착매심적증대，위암파배정도점진확대추세，동시지표침강량선감소후증대。재암성교차적지층진행수도적개알，용역인기주위암체적우동，재강도상차교대적지층교계처기영향체도최대，진이출현대적변형혹파배；단여과교계적량개지층암성상동혹상근，칙영향교소。
Mining tunnel excavation will cause harm to the underground environment, at the same time due to excessive ground surface settlement will cause harm to the earth's surface. This paper takes Chongqing Yongrong Mining Co., Ltd., rich ore mining engineering as the background, using the finite element numerical simulation software MIDAS/GTS to establish numerical model for the excavation of tunnel section, calculate the ground settlement caused by tunnel excavation. The results show that with the increase of buried depth, extent of damage of surrounding rock gradually expanding trend, at the same time, the surface subsidence increase with the decrease of the first. In poor lithology of the formation of the tunnel excavation, easy to cause disturbance of the surrounding rock mass, in the large difference of the stratum at the junction of the impact strength reached maximum, and large deformation or damage; but if the two the same or similar formation lithology, along the border is less affected.