... polyester resin, J-LokP, and a specialized J-LokP pump. When used with the MPA, J-LokP is injected into the bolt through the use of a grout swivel mounted on the drill head. This allows the miner to install and anchor the bolt remotely reducing his exposure to hazards. Full anchorage of the MPA installed...

... Modeling & Simulation Ground Control diameter strength experiment metals & mining strand laboratory resin cable bolt individual wire anchorage stiffness civil application anchorage capacity rock mass indentation cable deformation transfer mechanics ABSTRACT: PC...

... Upstream Oil & Gas metals & mining roof bolt plate reservoir geomechanics Rehabilitation roof surface crack support system roof deterioration drill hole deterioration Reservoir Characterization bolt system squeeze block anchorage coupler roof bolt roof support system...

... to fasten a buttress deformed rod which is thrust and turned into the plastic and in turn clamps the roof plate to the rock surface. Plastic tubes 10 to 16 inches in length provide sufficient anchorage to exceed the yield strength of steel rods 5/8, 3/4 or 7/8 inches in diameter. This paper presents field...

... stress approximation hydrostatic test hydrostatic data Reservoir Characterization axial stress nonlinear elastic theory reduction Upstream Oil & Gas prediction uniaxial strain friable sandstone friable sample compressibility pore-volume compressibility anchorage moisture lateral...

... rock slope behavior. The Slope Indicator Company extensometers were of the mechanical readout type with two 1/4 in. (6 mm) diameter stainless steel rods having Figure 2 Generalized Profile of South Slope, cone shell anchorages positioned at 6 ft (2 m) showing reinforcement, and 30 ft (9 m) back from...

... resin and cement fixtures. Friction Rock Stabilizers have captured 50 per cent of the American metal market useage in just three years since their introduction. Combination bolts featuring the stiffness and hi9h anchorage of resin bolts in combination with the best of mechanical bolt active loading...

... hannibal siltstone shale Missouri characteristic Anchor grout column design value Upstream Oil & Gas inspection exposure Hannibal anchorage strength Siltstone limestone construction coating shear strength test result grout CONSTRUCTION IN THE HANNIBAL SHALE; PROBLEMS...

... interface, reduce the shear stress there, and increase the anchorage in soft rocks, still giving sufficient bolt strength. Under axial loading the bolt load decays with distance into the rock along a fully grouted bolt. A given load is distributed over a shorter distance (15 inches) in hard rock, but over...

... the Split Set is approximately equal to the insertion force. Over a period of time, the anchorage of the Split Set becomes greater due to continued lock-up of the device from ground movement, corrosion, and other factors effecting friction on the contact surface. The anchorage of the Split Set in the rock...

... into 1 3/8" diameter borehole in rock. Depending on the smoothness, diameter throughout its length, straightness of the hole and frictional coefficient, an anchorage of 3/4 to 1 1/2 tons is obtained per foot of borehole contact upon installation. A top anchor can be used if suspension of rock is desired...

... general discussion horizontal stress excavation application LittleJohn Reservoir Characterization Upstream Oil & Gas sandstone anchorage stability designer Anchor grout interface probabilistic approach SESSION 2 - GENERAL DISCUSSION Question by John (for Bukovansky and Piercy) i...

...{ of Mining, The Pennsylvania State University. 293 Although millions of bolts are installed annually, only a negligible number are instrumented to determine the installed load as well as the value at any time thereafter. Without this knowledge, it is impossible to assess the efficiency. of anchorage. After...

... of the piece which may come against it, it must be strong enough and have sufficient anchorage to sup- port the estimated weight of the largest piece it may have to hold using a safety factor of at least a to compensate for uncertainties. SUPPORT OF UNDERGROUND OPENINGS 237 An example which comes to mind...