At the bedrock section of the auxiliary shaft of the Tong-ting coal mine, the sidewall has varying degradation degrees in different parts. The part on which water flowed is barely corroded, whereas the moist part near the pouring joints is seriously corroded. We first studied the mechanism of this phenomenon by chromatography, X-ray diffraction, and energy-dispersive X-ray spectroscopy. We then...

The evolution of surface subsidence is an important focus of study above Molycorp, Inc.’s newest block cave at the Questa molybdenum mine near Taos, New Mexico. The case study compares mature glory hole subsidence over the Goathill Orebody and subsidence emerging in its earliest stage over the new D Orebody block cave. Subsidence above the D Orebody was first detected in April 2003, 30 months a...

The 2008 Wenchuan earthquake triggered many landslides and caused high volumes of loose solid material to collect in gully drainage areas; over time, this eroded became the source for multiple debris flows. On August 13, 2010, a heavy rainstorm struck areas that were impacted by earthquake. resulting flows more than 2000 deaths destroyed numerous buildings, bridges, traffic facilities. To mitig...

The kinetic features of a slow-moving landslide situated above the Wudongde hydropower station were analyzed using particle flow code 3D (PFC3D) software. This research was based on geological investigations, remote sensing interpretation, and digital elevation models to build structure Jinpingzi landslide. Finite element analysis (FEM) used determine sliding surface. Strength reduction theory ...

The dynamic failure mechanism of horizontally layered dangerous rock during earthquakes is complex and only few studies have addressed the combination particle flow code (PFC) meso-level mechanical analysis. Based on fracture mechanics material we establish a calculation method for interlayer load stability coefficient horizontal strong earthquakes. was applied calculating slope along highway i...

Abstract The whole process of concrete slump experiment was simulated with Particle Flow Code 3 Dimensions (PFC3D) software based on discrete element simulation. simulation results are in good agreement the macroscopic obtained from field experiments, indicating that use PFC for had feasibility have a observation speed and direction particles slump.

Slopes are subjected to stress redistributions during underground mining activities, and this may eventually cause deformation or landslide. This paper takes Madaling landslide in Guizhou Province, China as a case study to investigate the failure mechanism and its run-out behaviours by using discrete element method. Previous qualitative analysis indicated that the slope experienced four stages ...

Numerical methods provide a new way for solving complex geotechnical engineering problems. Firstly, we review the emergence and development of numerical methods, introduce basic principles particle flow discrete element its application in engineering. After that, method servo combination cylinder loading plate is used, simulation three-dimensional rock triaxial unloading test carried out by PFC...