Abstract:

The paper uses two calculation methods: anaíytỉcal methođ and numericaí modeling method (MODFLOW) to calcuíate lowering water ìevel in mining vvorks. Calculation results according to two different methods give quite similar results. analyticaí method shows that atter 27 years of exploitation, the waíer level in the DM1 vvells is 9.84m; DM2 is 11.03 m; DM3 ỉs 10.60 m. For model method: dynamic water level in wells: DM1 is 10.76 m; ĐM2 is 11.11 m; DM3 is 11.82 m. These values are much smaller than the permitted water level (SCp=30 m). Since then: it has been concluded that the exploitation of 10,000 m3/day in Đông Mỹ wells is to ensure requirements and satety.