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Water

Tunnel water ingress controlLeaks and inflow stopped in tunnels, shafts and underground structures.Crack and joint injectionLeaking cracks and joints sealed, and structural cracks bonded, in concrete and masonry.Waterproofing and polyurea liningsPU membranes and polyurea linings for decks, tanks, tunnels and water structures.

Tunnels

Pre- and post-excavation groutingWater cut off and weak ground consolidated ahead of the face; voids closed behind it.Cavity and void fillingVoids above tunnel crowns, behind linings and under slabs filled without loading the support.Tunnel rehabilitationOld and operating tunnels: seepage stopped, ground consolidated and lining repaired, under traffic.

Ground

Track and slab re-levellingSettled ballastless track and slabs lifted back to level by PU injection, on live lines.Permeation and chemical groutingWeak, loose or wet ground strengthened and sealed by resins and gels that fill it without moving it.TAM groutingStaged grouting through sleeve pipes for shafts, foundations and deep excavations.Curtain and consolidation groutingSeepage cut-offs and foundation consolidation for dams, barrages, shafts and structures.Ground investigation and monitoringERT, GPR and MASW surveys, boreholes, lab tests and instruments, before and after treatment.

Rock, slopes and mines

Rock bolting and self-drilling anchorsRock bolts, self-drilling and prestressed anchors for tunnels, portals, slopes and caverns.Slope stabilisationSoil nails, anchors, mesh, drainage and rockfall barriers for slopes above roads, railways and towns.Mine shaft and strata treatmentWater sealed in shafts and declines; weak roof and face strata consolidated with resins and bolts.
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Railways

RailwaysSettled track, transition zones and wet tunnels on running lines.

Tunnels and metro

Tunnels and metroWater, cavities and weak ground in tunnels, shafts and metro works.

Hydropower and dams

Hydropower and damsSeepage, foundations, tunnels and slopes on hydro projects.

Mining

MiningWater in shafts and declines, and weak strata at faces and in roadways.

Water, ports and highways

Water, ports and highwaysWater tunnels and shafts, micro tunnels, pipelines, manholes and highway slopes.

Heritage and buildings

Heritage and buildingsSettlement, cracks and leaks in heritage structures and buildings in use.
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Services

Tunnel water ingress controlPre- and post-excavation groutingCavity and void fillingTunnel rehabilitationTrack and slab re-levellingPermeation and chemical groutingTAM groutingCurtain and consolidation groutingRock bolting and self-drilling anchorsSlope stabilisationCrack and joint injectionWaterproofing and polyurea liningsMine shaft and strata treatmentGround investigation and monitoring

Industries

RailwaysTunnels and metroHydropower and damsMiningWater, ports and highwaysHeritage and buildings

Sales

+91 99100 18144WhatsApp +91 99100 18144connect@geoconstech.com

Rock, slopes and mines

Mine shaft and strata treatment

In a working mine, water in a shaft and weak strata in a roadway stop production. We seal water-bearing layers around shafts and declines with grout rings, and consolidate fractured roof and face strata with injection resins, working within the mine’s own rules and shifts.

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When to call us

The signs

  • Shafts and declines taking water from a water-bearing layer.
  • Sudden inflow during sinking or development.
  • Weak, fractured roof and face strata in roadways and at faces.
  • Declines that keep needing support repairs.
Sealing water in a mine shaft and consolidating roadway strataSection of a vertical shaft through layered strata. Water from a water-bearing layer enters through the lining on the left; on the right, holes drilled from inside the shaft form a grout ring that cuts it off. A roadway at depth has its weak roof consolidated with resin and bolts. WATER-BEARING STRATACOAL 123456
  1. Water-bearing strata crossed by the shaft.
  2. Water entering through the lining.
  3. Holes drilled out from inside the shaft into the water-bearing layer.
  4. A grout ring around the shaft cuts the water off.
  5. Weak roadway roof consolidated with resin and bolts.
  6. Inflow measured before and after.
Geo Constech
Mine shaft and roadway · Section
Schematic · Not to scale

How we do it

Method, step by step

  1. Assess

    Inflow, strata and the mine’s working constraints.

  2. Seal the water

    Holes drilled from the shaft or decline into the water-bearing layer, and a grout ring injected around it.

  3. Consolidate the strata

    Low-viscosity resin injected into fractured roof and face strata, with bolts where needed.

  4. Work to the mine’s rules

    Shift pattern, ventilation and the mine’s safety management plan.

  5. Measure

    Inflow and roof behaviour recorded before and after.

What we use

Made at our plant in Alwar

Water-reactive two-component polyurethane resin

DrucHyd 2C

Curtain grouting against active inflow; waterproofing and consolidation under water pressure.

Polyurethane injection grouts and foams

PuTeRA

Water stopping, void filling, ground reinforcement, slab and track lifting.

Polyurethane silicate injection resins

DrucPietra

Low-foaming resin for deep curtain grouting and rock consolidation.

High-strength injection resins

DrucStone

Structural anchoring and consolidation.

Quality

Checks and proof

  • Inflow measured before and after.
  • Injection logged per hole.
  • Roof monitoring where strata were consolidated.

On record

References

References for this service are available on request.

Questions

What clients ask

Can resin be injected underground in a working mine?

Yes, with the right products and controls. We plan the work with the mine’s management: the products, the ventilation, the shift pattern and the safety rules.

What about gushing water during development?

Rapid-set PU foam reacts with the water and sets fast enough to stop a gush that would wash out a slower grout. It is followed by a resin that seals and consolidates the ground behind it.

Related services

Often used together

Tunnel water ingress control

Leaks and inflow stopped in tunnels, shafts and underground structures.

Rock bolting and self-drilling anchors

Rock bolts, self-drilling and prestressed anchors for tunnels, portals, slopes and caverns.

Cavity and void filling

Voids above tunnel crowns, behind linings and under slabs filled without loading the support.

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