How are pacer mining, hydraulic mining, and hard-rock mining different?

You've been tasked with siting a new well in a confined aquifer that already has several operating wells. Drilling logs indicate that the aquifer is primarily sand and gravel with an average thickness of approximately 200 ft. You have specific capacity data from several drilling logs in the area (table 1), as well as data from a 48-hour single well pump test that was previously performed at well AG-1 several years ago (table 2). At the end of the single well test, simultaneous drawdown measurements were taken in several monitoring wells surrounding the pumping well (table 3). Estimate the transmissivity and storativity of the aquifer, along with a realistic range of uncertainty around those numbers. Table 1: Specific capacity data for nearby wells WELL BOREHOLE PUMPING STABILIZED DIAMETER DRAWDOWN 24 inches 16 inches 8 inches MW-1 AG-1 HH-1 Table 2: Single-well pump test on AG-1 at 500 gpm Time (min) Drawdown (ft) 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 120 180 240 300 360 540 720 1440…

Select the best mining method to mine a 35 meters thick and 750 meters long mineral deposit, located 900 meters below the surface and dipping at 65 degrees. The ore value is moderate to high and the host rock strength is high. The estimated dilution is about 18 % and the required production rate is approximately 8,500 tons per day. None of these answers Block caving Room and pillar Open stoping Sublevel caving Shrinkage stoping Cut and fill

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