What social problems are associated with mining developments in LEDCs?

Mining is often a useful way for LEDCs to gain finanancially from their natural resources. However, large global mining companies and governments in developing countries often do not enforce the same planning, social and environmental standards as they would in MEDCs. Here are a couple of examples of the allegations that have been made:

A Canadian mining firm operating in Guatemala:

http://news.bbc.co.uk/1/hi/world/americas/7934513.stm

A British firm operating in Peru:

http://www.guardian.co.uk/world/2009/oct/18/peru-monterrico-metals-mining-protest

What issues surround gold mining in Guatemala?

The global demand for gold has pushed the price higher. What are the benefits and problems associated with increased mining for gold in the developing world? An example from Guatemala:

http://news.bbc.co.uk/1/hi/programmes/crossing_continents/7569810.stm