What do the SPT and CPT stand for in subsurface exploration? Briefly describe theprocedure of SPT.

During the process of drilling boreholes, the following tasks should be considered: Field logging, In situ testing, Sample collection   Field logging, Moisture content test, Sample collection   Sample collection, SPT test, Unconfined compression test   Field logging, In situ testing, Sample collection, Moisture content test

A new underground Lead-Zinc-Silver mine is planned to start at a depth of 1200 m below the surface level with an annual ore production of 2 million tons. After performing insitu testing, it was found that the proposed mine site is having very high horizontal stresses compared to the vertical stresses. Based on the given situation, what stability and ground control challenges will be there in your opinion and how you will manage them in a most effective manner without compromising with the safety and stability

What is the largest size of a spherical sand grain that the Stokes’ Law can be used to calculate its settling velocity. What is the terminal settling velocity for the sand in quiescent water? If you want to use a settling basin (with 3 m in depth) to achieve 100% removal for all sand grains of this size in the water, what are the required size (area and volume) of the basin for treating Q=10000 m3/hr. Assuming water temperature is at ~20 0C and the density of sand is 2650 kg/m3.