Both room-and-pillar and longwall mining systems develop underground excavations whose
stability must be ensured over their entire service life. Even though rock bolts have been …

To investigate the mechanical properties, damage characteristics, and fracturing behaviour
of specimens with a cavity formed by intersecting excavations, a series of uniaxial …

Failure of underground structures, especially intersections, becomes more severe as the
depth increases, which poses a new challenge for the safe construction and operation of …

Longwall mining is growing rapidly in Illinois. A coal company was faced with crossing a 3-m
normal fault in the development entries and the longwall face while mining a 375-m wide …

This research uses 3-D numerical analyses to analyze selected roof support plans with
primary and secondary support in and around four-way coal mine intersection geometry with …

To investigate the influence of intersection structures on the mechanical properties and
failure mechanisms of rock materials, a series of uniaxial compression tests on complete red …

Rock bolts have been extensively used as a support element in coal mines in the US for
about 40 years. Longwall development and partial extraction room-and-pillar mining …

The rock mass constitutive models should include elastic moduli, strength and stiffness of
intact rock as well as those of joints and geometric properties of joints. The post-failure …

This research develops an improved scientific understanding of stress distribution and
instability around a 4-way coal mine intersection with and without primary and secondary …

This paper discusses a numerical modeling and field study that focuses on: 1) Identifying
mechanisms of instability in the set-up rooms (SR) and T-junctions, and 2) Implementing …