Comparative Study on Fracture Behavior of the Reinforced Jointed Rock

2011 ◽  
Vol 250-253 ◽  
pp. 2562-2565
Author(s):  
Ming Tian Li ◽  
Shu Cai Li ◽  
Ning Zhang
Keyword(s):  
Fracture Behavior ◽  
Tensile Tests ◽  
Jointed Rock ◽  
Experimental Results ◽  
Tensile Fracture ◽  
Uniaxial Tensile ◽  
Rock Masses ◽  
Jointed Rock Masses ◽  
Stable Crack Propagation ◽  
Secondary Cracks

In order to understand the anchorage mechanisms the fracture behavior of jointed rock masses reinforced with rockbolts was compared with those of the jointed rock masses without rockbolts. Firstly the unaixal tensile tests were conducted on the specimens with inclined surface cracks, horizontal through cracks and horizontal a quarter through cracks to investigate the crack growth of the jointed rock masses without rockbolts. The experimental results show the fracture of the specimens without rockbolts belonged to tensile fracture in the catastrophic way under uniaxial tensile conditions. However the experimental results of the specimens reinforced with rockbolts show that rockolts can change the initiation of the pre-existing cracks, incur the secondary cracks and there existed stable crack propagation.

Experimental Study on Fracture Behavior of Jointed Rock with Filled Crack in Uniaxial Compression

2011 ◽  
Vol 243-249 ◽  
pp. 2439-2442
Author(s):  
Ming Tian Li ◽  
Shu Cai Li ◽  
Dong Liang Shao
Keyword(s):  
Experimental Study ◽  
Thin Plate ◽  
Surface Crack ◽  
Fracture Behavior ◽  
Jointed Rock ◽  
Thin Plates ◽  
Surface Cracks ◽  
Rock Masses ◽  
Jointed Rock Masses ◽  
Made In

The influences of the ways in which the surface cracks were made and fillings in the surface cracks on the fracture behavior of the jointed rock masses were studied by a number of experiments. In the experiments the surface cracks were made in different methods such as placing polyester and aluminum thin plate, cutting. The experiment results show that the surface crack made by placing polyester thin plates and cutting may well simulate the natural cracks in jointed rock masses, but the specimens can’t initiate and fracture through the surface cracks formed by placing aluminum thin plate. In order to study the influences of the fillings in the cracks on the fracture behavior of the jointed rock masses polyester and aluminum thin plates were placed in the surface cracks to simulate different fillings. Compare with the surface crack without fillings those with fillings initiated and coalescence at a higher load. However the influences of fillings on the crack growth were very complex, which required to be studied further.

A Multivariate Technique for Evaluating the Statistical Homogeneity of Jointed Rock Masses

2014 ◽  
Vol 48 (5) ◽  
pp. 1821-1831 ◽  
Author(s):  
Yanyan Li ◽  
Qing Wang ◽  
Jianping Chen ◽  
Shengyuan Song ◽  
Yunkai Ruan ◽  
...  
Keyword(s):  
Jointed Rock ◽  
Rock Masses ◽  
Jointed Rock Masses ◽  
Multivariate Technique ◽  
Statistical Homogeneity
Sign in / Sign up

Export Citation Format

Share Document