Results 1 - 2 of 2

• Identifying Moisture Sensitive Roof Rocks in Coal Mines
  8/1/2006 - Conference papers
  NIOSH conducted wet/dry immersion cycling of clay-rich rocks, which provides an accurate, quick and inexpensive method for estimating the moisture sensitivity of mudrocks. With this information mine operators can begin to anticipate hazardous ground.
• Shear Strength Evaluation of Clay-Rock Mixtures
  1/1/2000 - Conference papers
  This study reviewed 31 technical papers that analyze shear strengths for clay and sands containing rock particles. Results show that shear strength gradually increases with increasing percentages of floating particles in unsaturated clays.