541-0496/01 – Dewatering and Groundwater Tapping (OJPV)

The main goal of this subject is to make students acquainted with the basic methods of the technical exploratory works. The students have to learn technically describe and characterize dewatering and tapping wells and their constructional design, especially their lower part, equipped with the submersible pumps and filters. They will be able to explain the principle of their operation. In the thematic part relating to the problems of groundwater tapping they will be able to apply gained knowledge by the judgement and proposition of varieties of tapping equipment in various tapping areas. By use of the analyse they have to lear how to propose such the tapping equipment configuration as it could be utilized in the various conditions of groundwater storage. By use of the synthesis necessary to the formatization of the final form of solution they will be able to find optimum varieties of the processes leading to an achievement. Within the frame of the practical tutorials the students will be able to present achived results in the form of the project of tapping well. They must learn to apply their gained theoretical knowledge by the solution of concrete task within the frame of computation tutorials. The students must be able to judge the importance of gained information, to evaluate and choose this one, which is utilizable and essential for their next professional activity.

The subject offers a total review of these successive thematic spheres of action relating to dewatering and groundwater tapping. Hydraulics of water inflow to mines, quarries, construction pits with the focused on mining engineering, construction pits, quarries, deep mines and tunnels dewatering. Dewatering from surface (overview of methods, well interference, horizontal drainage, elektroosmosis). Underground dewatering (vacuous and gravity wells, drop caissons, well points, dewatering of deep mines) – propose of processes, methods of calculations. Active and passive protection (hydraulics barriers, seal walls), projects of dewatering, monitoring. Water well drilling, drilling units for drilling of water wells, hyrogeological well construction filters. Drilling mud for purposes of hydrogeological wells. Groundwater tapping. Vertical and horizontal tapping equipment. Combined systems for groundwater tapping. Tapping equipment construction, maintenance and repairs. Pumping equipment used in hydrogeological exploration, types of pumps, function, construction. Formation testers.

Chenevert, H.E., Hollo, R. (1981): Drilling Engineering, Manual; Tulsa, Oklahoma, USA Mazáč, J. (2005): Drilling Technologies, university mimeographed; VŠB-Technical University of Ostrava, Publishing Centre of VŠB-TU Ostrava Shallow Wells-DHD Consulting Engineer; P.O.Box 85 Amersfoort; Netherlands