Flat Jack Outfit Manufacturer,Supplier and Exporter in India
Product Code : JA-RT-9849
The Flat Jack Outfit (SKU JA-RT-9849) is equipment for estimating in-situ stress close to a rock surface by the flat jack method. A slot is cut in the rock, relieving the stresses perpendicular to it, and the resulting deformation is measured; the flat jack is then embedded in the slot and grouted, and hydraulic pressure is applied until the displacement is cancelled. Measuring the cancellation pressure in two perpendicular directions gives an approximate surface stress. It is supplied by JaincoLab for rock mechanics and mining laboratories.
Specifications
The outfit comprises a flat jack for embedding and grouting in a cut slot and a hydraulic pressure system for pressurising it; jack size, pressure range and measuring pins are not listed in the product data and are confirmed on the quotation.
| Product | Flat Jack Outfit |
| SKU | JA-RT-9849 |
| Method | Flat jack stress cancellation |
| Jack | Flat jack embedded and grouted in a cut slot |
| Loading | Hydraulic pressure until slot displacement is cancelled |
| Result | Approximate stress near the rock surface, from two perpendicular directions |
Applications of the flat jack outfit
Engineers mark reference points, cut the slot, record the closure, grout in the flat jack and raise the pressure until the points return to their original spacing, which gives the stress.
- In-situ stress assessment near rock surfaces
- Stress measurement in tunnels and mine openings
- Rock mechanics field practicals
- Masonry and rock wall stress studies
- Mining and civil engineering research
Scope of supply and ordering
This listing covers the flat jack outfit as described. Accessories, spares and quantities are confirmed on the quotation. Slot-cutting equipment and grout are confirmed on the quotation.
Minimum order quantity, packing and lead time for the Flat Jack Outfit are stated on the quotation once the quantity and delivery destination are known. JaincoLab supplies single laboratory orders, bulk requirements for engineering colleges and polytechnics, and tender lots.
Frequently asked questions
How does the flat jack method work?
A slot is cut, its deformation measured, and a grouted flat jack is pressurised until the deformation is cancelled.
What does it give?
An approximate value of the stress close to the rock surface.
Why test in two directions?
Cancellation pressures in two perpendicular directions describe the surface stress.
Related products
Browse the JaincoLab rock testing equipment range for other rock and geotechnical testing apparatus.
Request a quote
For a quotation on the Flat Jack Outfit, share the quantity, any size or specification preference and the destination via the JaincoLab contact page; the sales team also answers at [email protected]. Tender and project enquiries can be sent through the tenders page.
