Increasing demand for the use of different mechanized excavation systems in civil and
mining projects has elevated the importance of understanding the wear process of rock …

The TBM tunneling process in hard rock is actually a rock or rock mass breakage process,
which determines the efficiency of tunnel boring machine (TBM). On the basis of the rock …

We argue that by fracturing rock, not by raising it relative to base level, tectonics plays its
most important role in causing rapid incision of valleys and rapid erosion of hillslopes …

Episodic debris flows scour the rock beds of many steepland valleys. Along recent debris-
flow runout paths in the western United States, we have observed evidence for bedrock …

Abstract Measurement-while-drilling (MWD) aims at collecting accurate, speedy and high
resolution information from the production blast hole drills with a target of characterization of …

Performing a testing program to evaluate the impact of shape and size on common rock
properties, some surprising results were encountered. Firstly, the shape effect had the …

Estimating the disc cutter wear life or change time is a critical part of performance prediction
for the application of hard rock TBMs. This paper examines the disc cutter wear rate and the …

Rock microfabrics were quantified by image measurement system (petrographic image
analysis) of thin sections. Along with common measured parameters (grain area and size …

The Cerchar abrasion index is commonly used to represent rock abrasion for estimation of
bit life and wear in various mining and tunneling applications. Although the test is simple …

The tunnel boring machine (TBM) method has become widely used and is currently an
important presence within the tunnelling industry. Large investments and high geological …