Mining

kimberlite

The depth of the mine can be calculated using the formula: distance = 0.5 * acceleration due to gravity * time^2. Given that the time taken for the stone to hit the bottom is 3 seconds, we can substitute this into the formula along with the acceleration due to gravity (9.8 m/s^2) to calculate the depth of the mine. The depth of the mine would be approximately 44.1 meters.

The 2008 Mineral Resource Map of Saskatchewan indicates ten potash mines currently operating in the province.

About 300 million metric tones per annum

Russia is the leading Asian producer of Iron.

A low grade copper mine might be re-opened if:

1) If copper prices go up.

2) It's a massive deposit, easily extracted, close to rail lines or shipping.

3) If it's found with something else, like silver or gold, that boosts the value.

4) During war, or major copper shortage.

5) If cheap new refining methods are discovered.

When the rescue shaft was complete, two rescue workers descended into the mine to assess the miners health and get them loaded into the elevator.

mines continually flood with ground water. while in operation the water is pumped out. when shut down the pumps are shut off and the mine fills up with water to the level of the water table. this water is often acidic because of sulfides oxidizing to sulfuric acid on exposure to air.

for many torture. in many camps one egg sold for $5, at a time when back east you could buy a complete lunch for one dime. many independent miners could not make enough to eat, so they got jobs with the big mining companies that were so dangerous that today OSHA wouldn't even let the job exist.

Read Mark Twain's book "Roughing it" to get a better idea.

They worked in a gold mine for a company mining for gold.

easy to cover the pit

If you breath in to much of the air, it's almost like smoking. It can cause cancer, or black lung.

while they were underneath the surface the surfaced collapsed on them.

To start off, mining is one of the most dangerous jobs because you are going underground and there are many small expositions that you have to becareful not to trigger. Somehow, one of the mini "bombs" you can call it, exploded and the miners got trapped underground. It took 2 months to keep the ground from completely falling on them, then took about a week to use the transport thing to get all of them out.

Hope this helped!

Chilian Mine

Some positive effects of deep sea mining include increased access to resources and more jobs. It also reduces the strain on land based mines.

Most Boom Towns went bust after the mineral that was being mined became depleted, or the ore became unprofitable. In fact, early Boom Towns in the 1880's through the 1900's were lawless places which were run by company gangs or union gangs!

Updated By: Levi M Levitt

well, the ancient Greeks mined copper over 2000 years ago and the mining residues still kill any vegetation that attempts to grow in the area.

It pollutes the air that we breath and the environment

It was found in North Carolina in the 1800;s

Buaxite is the ore from which aluminum is extracted.

some very rich miners got there chirdren tort but not so rich ones tort there chirdrwn

:l:l:l:l:l

steel

A vertical roller mill is an energy efficient grinder that grinds items into incredibly fine powders used for ceramics, cements, pyrotechnics, etc. using vertical pressure from an outer vertical roller on the inner rollers and disks to cause circulation. A ball mill is a grinder that creates very fine powders for paints, pyrotechnics, ceramics, etc. using cylindrical rolls and balls made of various materials that roll on an axis.