Tester for lateral expansibility of soft rock

[0026] The main structure of the soft rock expansibility tester involved in this embodiment includes a loading cap 1, a pressure bearing plate 2, a dynamometer 3, a pulley 4, a sample loading chamber 5, a water permeable plate 6, a sliding protection groove 7, a measuring ring 8, Dial indicator 9, pressure display instrument 10, filter paper 11, bearing base plate 12, fixed block 13; the two ends of the bearing base plate 12 of rectangular plate structure are connected with fixed fixed block 13; The sample chamber 5 and the soft rock sample are placed in the sample loading chamber 5, and the left and right sides of the sample loading chamber 5 are provided with a sliding protection groove 7 with a non-hollowed concave groove structure on the bottom plate, and the sliding protection groove 7 is seated in the bearing bottom plate 12 on the pulley 4, so that the sliding guard 7 can move left and right in the horizontal direction; the left and right sides of the sliding guard 7 are co

[0040] Such as Figure 1 to Figure 2As shown, a soft rock expansibility tester includes a lower support platform and an upper sample chamber 5, and a vertical load loading cap 1 is arranged on the upper part. Pressurization under deformation, and complete two pressurization modes of strain control and stress control at the same time; the sample is generally aimed at the rock sample of expansive soft rock, which is a cuboid, and the pressure-bearing plate of the vertical loading device above is 2 dimensions wide and the rock sample The width is the same, the length is slightly longer than the long side of the rock sample, and the size of the rock sample is a cuboid rock sample of 75mm×75mm×150mm.

[0041] The sliding groove guard plate 7 can move along with the lateral deformation of the rock sample. The sliding groove guard plate is a non-hollow concave groove on the bottom plate, and is seated on the pulley. Connect the force measuring device on both sides. A permeable board