TY  - JOUR
PY  - 2022//
TI  - Study on catastrophe instability criterion of surrounding rock in tunnels blasting crossing water-rich fault zones
JO  - China safety science journal (CSSJ)
A1  - Peng, Y.
A1  - Liu, G.
A1  - Huang, Z.
A1  - Lyu, H.
A1  - Wu, L.
SP  - 104
EP  - 111
VL  - 32
IS  - 5
N2  - In order to solve instability problems of tunnels blasting through rich water fault zones, based on instability mechanical model of tunnel-fault system under blasting, a cusp catastrophic model was established considering the combined effects of blasting and groundwater. Instability mechanism of surrounding rock under tunnel-fault system was revealed, and its instability criterion was developed. Then, with resource allocation project of Pingtan and Minjiangkou in Fujian as an example, rock stability of tunnels crossing water-rich fault zones was evaluated. The results show that the instability of surrounding rock is a result of internal and external factors. Due to long-term water-rock interaction and cumulative blasting, mechanical properties of surrounding rock in water-rich fault zones are constantly weakened, and catastrophe criterion, k value, is constantly reduced, which probably leads to instability and failure of the rock. The results of instability risk evaluation based on the criterion are consistent with field conditions. © PHYSOR 2022 China Safety Science Journal. All rights reserved.<p /> <p>Language: zh</p>
LA  - zh
SN  - 1003-3033
UR  - http://dx.doi.org/10.16265/j.cnki.issn1003-3033.2022.05.0887
ID  - ref1
ER  -