Disadvantages of open pit mining One of the main disadvantages of this type of mining operation is the environmental impact it causes. Since cyanide, mercury and sulfuric acid are used to remove the wastewater, groundwater and air are contaminated as toxic dust. This is absorbed by animals and plants.
Open pit extraction is far safer than shaft mining. The threat of cave in or release of toxic gas in underground mining is a continuing concern. When shaft mining was the most common method of mining ore, thousands were killed in cellars, gas events and equipment accidents. In 1907 alone, there were more than 3,200 mining related deaths.
Cons: 1. Water pollution: Mining results in contamination of the soil and groundwater from the chemicals in the mining zones. Contaminated groundwater can flow to rivers or lakes contributing to water pollution. 2. Leads to deforestation: Mining in a certain area leads to deforestation as trees are cleared to pave way for the mining activity. The clearing of trees or forests contributes to climate change.
4. Disadvantages of open pit mining. However, disadvantages when compared to Underground Mining also exist: Very large amounts of waste rock are mined. This creates costs as well as environmental issues with waste rock disposal; Major disruption of surface: pit footprint, waste dumps. High visual impact, especially strip mining.
Societies located near potential mining sites are at increased risk to be subjected to injustices as their environment is affected by the changes made to mined landseither public or privatethat could eventually lead to problems in social structure, identity, and physical health .
Strip Mining Cons to Consider. 1. It requires an investment gamble. The processes of strip mining are cheaper. The actual investment into those processes, however, are typically higher than in other forms of mining. From equipment to staffing to distribution, it may not always be possible to gain an exit out of this investment. 2.
An open pit mining operation virtually eliminates any biologic life at the surface. Vegetation is stripped, and the surface at the dig site is left completely barren. Without replanting and restoring the ecosystem, a strip mining site can take decades to recover. Abandoned mining pits can also pose extreme risks.
Open pit mining is significantly less costly than underground mining. Infrastructure and labour savings are passed onto the buyer of mined materials, which eventually trickles down to the consumer. Con: Environmental Contamination
June 10, 2020
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