Question

brainly only wastes my time and what is urs experience​

Answer 1

Answer:

Yes we waste our time answering questions

Explanation:

Then moderators delete our answer

Copper mining is usually performed using open-pit mining, in which a series of stepped benches are dug deeper and deeper into the earth over time. To remove the ore, boring machinery is used to drill holes into the hard rock, and explosives are inserted into the drill holes to blast and break the rock.