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Showing 1 to 2 of 2 for “"flat jacks"”.
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A study into the mapping of an induced fracture in a fine grained sediment in biaxial and triaxial stress formations
… rig structure has been built to house three flat jacks which place a 100mm3 rock sample under pressure of up to 120 bars (12MPa) in three different directions, to represent rock at in situ depths. In conjunction with the flat jacks, 6 acoustic sensors can be placed around the rock sample to …
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Preliminary Design of an Improved Load Measuring Device for Underground Mining Standing Supports
Standing support is often used in conjunction with underground retreat mining. Knowledge of the load-displacement behavior of a standing support and loading induced by the mine opening is critical proper support selection. The NIOSH STOP database contains load-displacement laboratory test data for …