The recent increase in silicosis cases in several countries casts doubt on dust control
practices and their effectiveness in preventing respirable crystalline silica (RCS) exposure …

There are many challenges in the construction of large-diameter tunnels, such as low
efficiency of manual construction and poor safety. To solve the problems, a multi-functional …

In order to control the dust pollution produced by air leg rock drill in the trolley area during
the excavation of long-distance single ended tunnel, the full-scale physical model of working …

In reverse circulation (RC) down-the-hole hammer (DTH) drilling, hole cleaning has a great
impact on reducing accidents and improving efficiency. There is a technical difficulty in RC …

This paper sets forth a geomechanics framework for assessing the energy efficiency of rotary
percussive drilling using the energy criterion, which has been proposed by Victor Oparin for …

Air reverse circulation (RC) drilling has drawn considerable interest and has been adopted
in tunnel drilling owing to its beneficial features. Cutting transport is a primary concern in RC …

There are many challenges in the construction of tunnels with large section, such as weak
surrounding rock control, low efficiency of the artificial construction and poor safety. To solve …

An orthogonal experimental design method is employed to investigate the effect of the
structural parameters of the drill bit used in the Casing-while-Drilling (CwD) technology on …

Pneumatic down-the-hole (DTH) hammer drilling technology has been used extensively in
various drilling applications owing to its high drilling efficiency, low gas consumption, non …

Pneumatic down-the-hole (DTH) hammer has been extensively used in air drillings through
hard and ultra-hard geological formations. Numerical modeling can offer close observation …