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NUMERICAL GEO-FLOW MODELING OF HORIZONTAL DRAINAGE HOLES



The drainage system of the Grib deposit with implemented combined dehydrating is analyzed. Aimed to reduce water head in pitwall rock mass, as the depth of the open pit increases, horizontal drainage holes will be drilling from lower berms. Predictive designs of horizontal holes using numerical geo-flow modeling have no appropriate validation procedures. The authors have set and performed numerical experiments in VisualModflow environment in order to validate modeling procedure for horizontal drains. The key objective of the numerical experimentation is to determine conditions at hydrodynamic boundary of drains versus discreteness and geometry of numerical model, as well as parameters of a model horizontal hole. The numerical experimentation reference was chosen to be a horizontal drain hole with a length of 150 m and diameter of 0.2 m. By comparing heads and flow rates with the reference values, the hydrodynamic boundary conditions of drains were selected. The interaction of the above listed parameters is described, and the general recommendations are given for correct finite-element modeling of drain holes.


For citation: Kotlov S. N., Shamshev А. A. Numerical geo-flow modeling of horizontal drainage holes. MIAB. Mining Inf. Anal. Bull. 2019;(6):45-55. [In Russ]. DOI: 10.25018/0236-1493-2019-06-0-45-55.



: 6
2019
ISBN: 0236-1493
УДК: 556.3.06, 556.3.07
DOI: 10.25018/0236-1493-2019-06-0-45-55
Authors: Kotlov S. N., Shamshev А. A.

Authors' Information:
S.N. Kotlov, Cand. Sci. (Geol. Mineral.), Senior Researcher,
А.A. Shamshev, Engineer,
e-mail: Artemiy.Shamshev@gmail.com,
Saint Petersburg Mining University,
199106, Saint-Petersburg, Russia.
Corresponding author: А.A. Shamshev, e-mail: Artemiy.Shamshev@gmail.com.



Key words:
Prediction of water inflow in mines, horizontal drain holes. Numerical geo-flow modeling, hydrogeological conditions, induced groundwater regime.

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