Progress on rock mechanics research of Beishan granite for geological disposal of high-level radioactive waste in China

被引：32

作者：

Chen, Liang ^{[1
,2
]}

Zhao, Xingguang ^{[1
,2
]}

Liu, Jian ^{[1
,2
]}

Ma, Hongsu ^{[1
,2
]}

Wang, Chunping ^{[1
,2
]}

Zhang, Haiyang ^{[1
,2
]}

Wang, Ju ^{[1
,2
]}

机构：

[1] CAEA Innovat Ctr Geol Disposal High Level Radioact, Beijing 100029, Peoples R China

[2] Beijing Res Inst Uranium Geol, Beijing 100029, Peoples R China

来源：

ROCK MECHANICS BULLETIN | 2023年 / 2卷 / 03期

关键词：

Rock mechanics; Granite; Underground research laboratory; Geological disposal; Beishan area; CRACK INITIATION STRESS; TBM PERFORMANCE; TEMPERATURE; EXCAVATION; BEHAVIOR; DISPLACEMENT; CRYSTALLINE; PREDICTION; TESTS; MODEL;

D O I：

10.1016/j.rockmb.2023.100046

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The mechanical behavior of host rock for a deep geological repository of high-level radioactive waste plays a key role in ensuring the isolation function of host rock as a natural barrier under the multi-field coupling environment. For a better understanding of granite in China's Beishan pre-selected area for geological disposal of high-level radioactive waste, a series of investigations were carried out on in-situ stress field of rock mass at depth, strength and deformation characteristics of rocks under different stress and temperature conditions, and rock boreability and adaptability to Tunnel Boring Machine (TBM) technology. The results indicate that Beishan granite shows typical characteristics as a hard and brittle rock with a quite low permeability, and it is favorable to geological disposal. Meanwhile, a new rock mass suitability evaluation system was proposed, and the rock mass mainly composed of Beishan granite was proven to be suitable for geological disposal. Besides, the construct- ability of Beishan granite at engineering scale was tested and verified through field tests in the Beishan Exploration Tunnel (BET). Here, we summarize the main outcomes of rock mechanics research on Beishan granite in the past years and introduced the current progress of Beishan underground research laboratory (URL) for geological disposal.

引用

页数：17

共 51 条

[1] The Aspo pillar stability experiment: Part I-Experiment design [J].