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利用泡沫混凝土封闭废矿井地下开采本来就有危险，一旦矿井报废，废井可对人和动物构成一系列的危害。通常用栅栏或格条将井口加以封闭，但很容易被破坏，也不能对井口的稳固提供结构性支护。填平井筒的造价很高，而且回填材料会随着时间的推移而移位或下沉。美国矿山局提...
The use of foam concrete to shut down waste mines underground mining was inherently dangerous, once the mine scrapped, waste wells can pose a series of human and animal hazards. The wellhead is usually enclosed by a fence or grid, but is easily damaged, nor does it provide structural support to the wellhead. The cost of smoothing the wellbore is high and the backfill material can shift or sink over time. United States Bureau of Mines mention ...