The technology of drilling tests makes it possible to obtain the strength parameter of rock
accurately in situ. In this paper, a new rock cutting analysis model that considers the …

RMR is a simple rock mass classification system and is often used for characterization and
design purposes in preliminary stages of mining and civil engineering practices. However …

When shield tunnelling is constructed in complex geological conditions using a tunnel
boring machine, the disc cutter in the cutterhead easily wears to the failure state, particularly …

This paper surveys the field of measurement-while-drilling (MWD) technology for
smalldiameter drilling machines. Using this technology, mechanical data (eg, torque, thrust …

Conical pick is a widely used tool for cutting coal in mines. It has a cemented carbide tip
inserted in a steel body. Cemented carbide has been in use for many years for coal/rock …

Though disc cutters are widely used in mixed strata, eccentric wear of disc cutters in soft part
of mixed strata is still an important factor influencing the efficiency and cost of TBM …

The understanding of rock removal mechanisms, as one of the essential elements for
advancing the cutting performance of polycrystalline diamond compact (PDC) cutters, is still …

This article establishes a new model for estimating the peak indentation force of the edge
chip** of rocks when using a conical or a pyramidal point-attack pick. The investigation …

The breakage of cutter ring during shield tunnelling is studied in this paper. The field
observation reveals that the major reason for the cutter ring breakage is attributed to the …

Chip geometry can play a crucial role in understanding the rock cutting efficiency in
mechanical excavation. In this study, the shape and size distribution of chips produced in …