Changes of hydrogeological conditions in the area of liquidated hard coal mines in the north-eastern part of Upper Silesia Coal Basin (southern Poland)

摘要

Restructuring program that has been introduced since early 90's of the 20th century in the Polish hard coal mining, intensified the process of liquidating hard coal mines mainly in the northern part of the Upper Silesian Coal Basin. Eleven of hard coal, in which exploitation had been terminated in the years 1995-2000, were analysed in detail. Their total mining area was 252,7 km~2. Drainage of the workings in the closed hard coal mines is developed by means of one out of four methods: stationary, deep-well, mixed stationary - deep-well and gravitational. In flooded hard coal mines the rate of rising water table range from 0,04 to 1,28 m/d. The groundwater inflow into the analyzed area was reduced from 258,9 m~3/min (in 1988) to 112,2 m~3/min (in 2004), i.e. by ca. 43,3 percent. The amount of water collected in mine workings flooded till is 48,6 mill m~3 totally.