Abstract An inflatable rockbolt is a steel tube that has been rolled into an omega shape. During installation, water injected the tube, which expands profile of rockbolt, generating radial force against borehole wall. This reinforces rock mass through friction at bolt–rock interface. study aims to quantify effects size, roughness, and installation pressure on pull load capacity bolt. was achiev...

Historically, the design of the in-stope pillar in underground excavations has been based on empirical formulae and numerical modelling. Although these design methods have been extensively applied in several gold mines in South Africa, rockburst, in-stope pillar burst/failure are continuously reported as the major problem faced by mines. Therefore, this study attempts to compare the performance...

The stability of surrounding rock is the basic guarantee underground space engineering safety. large deformation a roadway’s very common phenomenon during excavation coal mine roadways or mining, especially in deep soft mining roadways. With increase depth and stress, it important to prevent disasters caused by deformation. This work aims conduct an optimization design roadway support for mines...

Abstract A rock bolt is a tendon which can be either rod or strand, installed in borehole to reinforce the surround mass and soil.

This article considers the seismic behavior of beam-to-column joints in steel frames for different bolt arrangements by using of finite element modeling. As the most important beam-to-column joint type, the beam-to-column joints with end-plate is chosen for the analysis. Four different specimens have been analyzed. These models had some differences such as bolt arrangement and the presence or a...