... was identified as the main seismic control measure, the contribution of fragmented ore presents another component capable of reducing the seismic energy release measured at the mine. As part of the seismic hazard research initiative, the National Institute for Occupational Safety and Health (NIOSH) collaborated...

.... trajectory highwall geology configuration mineral rockfall barrier testing geologist rockfall geotechnical center spectrum video excellence national institute dimension university cloudcompare hazard niosh modeled rockfall dynamic occupational safety ARMA 24 1048 Rockfall Barrier Testing...

... morgantown fault shear strength discrete fracture network kim excavation geometry niosh larson ARMA 22 0019 Approaches to Determine Fault Shear Strength in Large-scale Direct Shear Test Simulations using Discrete Fracture Networks Kim, B.H. and Larson, M.K. CDC/NIOSH, Spokane, Washington, United...

... of ground response during longwall recovery operations. First, more elaborate multi-variable statistical analyses of 130 cases (reported by NIOSH) is completed, highlighting significant geologic and mining factors affecting the stability of pre-driven recovery rooms. Second, ground reaction to the longwall...

... excavations that have poor air circulation will be most susceptible to build up of toxic fumes. Health & Medicine US government Upstream Oil & Gas air emission Niosh lateral migration groundwater level concentration manhole groundwater blast area migration gas Bubble subsurface...