scholarly journals Research on fracture mechanism of high ground stress fracture rock tunnel and auxiliary construction measures

2018 ◽  
Author(s):  
Fei Ding
Keyword(s):  
Stress Fracture ◽  
Fracture Mechanism ◽  
Fracture Rock ◽  
Ground Stress ◽  
Rock Tunnel

Research on Test of Reducing Deformation of Soft Rock Tunnel with High Stress Level by Pilot Heading

2012 ◽  
Vol 170-173 ◽  
pp. 1565-1568
Author(s):  
Xin Yan ◽  
Yang Sheng Ye
Keyword(s):  
High Stress ◽  
Soft Rock ◽  
Primary Reinforcement ◽  
Geological Exploration ◽  
Ventilation Condition ◽  
Ground Stress ◽  
High Stress Level ◽  
Rock Tunnel ◽  
Primary Support ◽  
Surrounding Rock Deformation

Generally speaking, the pilot heading is aways used for geological exploration，speeding up the construction，improving the draining and Ventilation condition, promoting efficiency of residue transporting. When tunneling on high ground stress soft rock region，the pilot heading will play a more important role. Lan yu line Mu Zhai ling tunnel main passes through the region of carbonaceous slate. Due to the high ground stresses, the primary reinforcement system underwent large deformation, evenmore the lining is cracked. Through excaving the pilot heading, can relief the stress. Then enlarg the pilot heading to main tunnel, the deformation of primary support will be reduced, and the tunnel will be stable. Compare the "pilot and enlarging" excavation method with bench excavation method on surrounding rock deformation. As the result, the "pilot and enlarging" excavation method is effective for control of the deformation of the tunnel.

Stress Fracture in Posterior Aspect of the Tibia

1999 ◽  
Vol 40 (1) ◽  
pp. 147
Author(s):  
Tae Yong Moon ◽  
Kyung Ah Chun ◽  
Bong Sig Koo ◽  
Sang Yong Lee ◽  
Hyun Woo Jung ◽  
...  
Keyword(s):  
Stress Fracture ◽  
Posterior Aspect

Do Capactively Coupled Electric Fields Accelerate Tibial Stress Fracture Healing

2005 ◽  
Author(s):  
Andrew R. Hoffman ◽  
Belinda Beck ◽  
Gordon Matheson ◽  
Gabrielle Bergman
Keyword(s):  
Fracture Healing ◽  
Electric Fields ◽  
Stress Fracture ◽  
Tibial Stress Fracture

Unique sacral stress fracture in a runner

1988 ◽  
Vol 151 (6) ◽  
pp. 1255-1255 ◽  
Author(s):  
DJ Czarnecki ◽  
EW Till ◽  
JL Minikel
Keyword(s):  
Stress Fracture ◽  
Sacral Stress Fracture

Stress fracture of the os peroneum

1989 ◽  
Vol 152 (2) ◽  
pp. 430-430 ◽  
Author(s):  
MR Crain ◽  
GY el-Khoury
Keyword(s):  
Stress Fracture ◽  
Os Peroneum
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