Bore Abandonment/Rehabilitation

The main purposes for abandoning bores is to block access pathways into the bores that may exist from surface contamination, groundwater migration or as dangerous voids/traps.

The process involves using a sonic device which shoots projectiles that penetrate and blast holes through the casing. Then a high velocity detonating chord creates a radial force rips and busts the seams and joints enlarging the holes created by the projectiles.

The grout/cement, added after emplacement of the device, which is twice the weight of water sits above the charge and stems the blast (absorbs the upward blast and pushes the blast sideways through the casing).

The compression shockwave pushes sealing material out into the formation and thrust through the shattered casing out into any voids, cavities, and gravel that surrounds the bor .to ensure a proper seal.

In addition after detonation sealing material in the bore that has dropped is replace to fill remaining voids.

SAFETY FEATURES

Non Electrical: Power lines, Radio frequency and other extraneous electricity are safe to work around. No Air Blast or Flying Debris: The weight of the cement makes a excellent stemming and keeps debris confined in the bore. Low Noise Level: The viscosity of the cement dampens, keeping the noise from reaching the surface. Low Vibration Level: The small amount of explosive charges used kept vibrations confined to the area immediately surround the bore.