DRILLING EQUIPMENT FOR AQUIFERS DRAINAGE FROM COAL MINES WITH UNDERGROUND EXPLOITATION
1. Željko Vukelić, Naravnoslovnotehniška fakulteta Ljubljana, Slovenia
To ensure safe mining under aquifer layers is necessary as far is possible with drainage processes to reduce the water pressure in the aquifer above the coal layer. The water pressure is also one of the main input data for the calculation of the permitted height of excavation, therefore, to obtain realistic data necessary to carry out the appropriate monitoring of changes in water pressure, which is indicator of the effects of drainage. The solution results in making alternative underground facilites - impress filter. For the drilling of impress filters must be used properly drillin equipment. A method of making impress filter is the standard manufacturing process of the drilling impress filter in aquifers. The equipment has been tested in Coalmine Velenje. Although it can be used anywhere with underground exploitation of coal.
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