Analytical techniques for mine water inflow estimation

Question

Dear friends, We are constructing borewells in the area surrounded by mines.
Can someone explain different analytical techniques for mine water inflow estimation incorporating several refinements, such as finite boundary conditions, linear, fracture and turbulent flow conditions? These methods will help us do groundwater modelling for our area.
Your help would be much appreciated. If you have practically applied any of the techniques, please share your experince of adopting that particular technology. 
Best.

Anastasia Boronina · Answer

Dear Ismael, We successfully applied analytical models for borefield design. The models can be developed for a variety of conceptual schemes and boundary conditions. We also calibrated the analytical models similarly to what we did in numerical modelling. You are welcome to download my presentation at IAH Australia from Linked In and look at its second part (AMWELLS modelling). Do not hesitate to contact me with any questions by email aboronina@hotmail.com

Prem Baboo · Answer

Dear Ismael Letang Analytical Technique for the estimation of mines water inflow
 
Reliable estimation of groundwater inflow into underground openings is critical to design and construction of underground crude oil storage in rock masses. Water detection is crucial in helping decide whether water curtain holes should be added to achieve water balance, especially during excavation. The transient electromagnetic method (TEM) is an electromagnetic induction technique measuring the duration of the magnetic field of a pulse current in a transmitter loop. TEM can measure the electrical resistivity of underground layers to a depth of several hundred meters. Originally designed for mineral investigations, over the past TEM has been very effective in hydro geophysical work.
Despite the vicinity of water bearing zones, fractured rock's variable hydraulic continuity often requires use close to the storage caverns of a water-curtain system. The groundwater pressure around the storage caverns should be higher than the pressure of stored oil to prevent oil leakage into the rock mass. Water curtains artificially recharge water in the rock mass to enhance flow patterns and maintain a high hydraulic potential near the storage cavern (attached fig). Equations 1 and 2(attached) calculate this flow .
Please find attached herewith attached presentation and images,
Regards,
Prem Baboo

SM Farid Uddin Akhter · Answer

Very good question. looking forward for answers.

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