地盤沈下と環境システム Ｉ

Abstract

Extraction of mineral and energy resources from underground causes visible damages, which result from not only surface subsidence already being treated well but also the change of ground water flow, the cave-in of cavities remaining at shallow depths and many other things. In addition the land disturbed by extracting reduces its own econdmical values and injures some ground environments; the land tends to be flooded, construction of buildings on the land requires special considerations and residents on the land always feel restless under the dangerous situations. The problem of restoring the disturbed lands is difficult because of including various social factors and thus this should be considered as an environmental system. This paper describes the actual state of damages caused by extracting resources and the influence factors giving rise to the environmental impacts, and also presents some points should be discussed in the future.