Whenever engineers look for geological sample equipment, the scope of the mining operation is often the biggest factor when choosing. Depending on the type of mineral to be mined, the methods of mining can be completely varied. The factors that determine the type of mining used include the terrain of the local area where the mineral is to be extracted, the amount of deposits, the urgency with which the mineral must be transported after it has been extracted and the budget available. The following are the most common mining techniques available in the market today.
Placer mining comes from the word placer which has Spanish roots. Its equivalent in Spanish means a shallow sand bank. Placer mining refers to the extraction of minerals at or near the surface of the earth. The raw materials are normally deposited in the gravel or sand layer of the soil, and there is never any need for comprehensive extraction techniques like deep digging, drilling or blasting away using dynamite. In fact, sometimes placer mining involves simply picking off visible mineral deposits from the ground, or using purification methods like dredging, sluicing or panning. It is the simplest and cheapest method of mining.
Hydraulic mining just as the name suggests involves the use of water. The water used is often at high pressure. The water pressure comes in handy when it is sprayed on the rock or gravel in an area where mineral deposits have been discovered. The water pressure normally removes both the covering gravel or rock and the mineral ore deposited underneath. The mixture of the mineral ore and the water and gravel or rock is then collected and refined to separate the valuable minerals. This mining method damages the environment if not managed properly, and is illegal in many countries. Check this core trays.
Hard rock mining is perhaps what comes to the minds of most people when they think about mining and procuring mining supplies. It involves digging through hard rock or soil to reach the area where the mineral ore is deposited. The equipment used in this digging varies with the depth where the mineral was found, the complexity of the operation and the budget available. Miners use shovels and picks, and large drills or blast their way through using dynamite. The digging follows specific paths, either directly down to where the mineral deposits are like a borehole or following cracks and rock faces horizontally. A common problem with this type of mining is that of flooding when the digging reaches or approaches the water table. The water then has to be pumped out regularly to make way for further digging or for a smooth mining procedure.
Open pit mining is the largest scale one of all, and is just like hard rock mining, only that the holes are large and not like the small shafts used in hard rock mining. Minerals extracted this way include copper and molybdenum. They are huge and devastate the surrounding environment. They are complex, large scale mining operations that often require blasting using dynamite.