renco mine, chiredzi mining district (hartley mining district), masvingo, zaka, populated place, 20 20' 12' s, 31 27' 48' e, 3.0km (1.9 miles) Numerical Modelling Approach For Mine Backfill authors: muhammad zaka emad at university of engineering and technology, lahore underground iron ore mining in ukraine with backfilling worked-out area.