Results 1 - 3 of 3

• 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.
• Copper Exchange Capacity of Clays and Their Potential Effect on In Situ Copper Leaching
  1/1/1992 - Reports of Investigations
  The Bureau of Mines conducted Cu exchange tests for six common clays under simulated in situ leaching conditions. Regression equations were obtained from the data expressing the Cu exchange capacity as a function of Cu concentration, pH, and temperature.