Frequency variable permeation device for broken rock water and sediment two-phase seepage

Abstract

The invention discloses a frequency variable permeation device for broken rock water and sediment two-phase seepage and belongs to the technical field of a penetration test. The frequency variable permeation device for the broken rock water and sediment two-phase seepage comprises a permeameter and a pressure control device. A broken rock storage cavity is set in the permeameter. The broken rock storage cavity is equipped with at least one group of corresponding water and sediment storage cavity and filtering device. The water and sediment storage cavity is equipped with a pressure head and afirst liquid inlet pipe. The filtering device is equipped with a first liquid outlet pipe. The pressure control device comprises an upper cylinder and a lower cylinder. The lower cylinder is equippedwith a second liquid inlet pipe and a second liquid outlet pipe. The second liquid outlet pipe is connected with the first liquid inlet pipe. A stirring device is set in the lower cylinder. A piston is set above the stirring device. A piston rod is connected with a speed controller. According to the frequency variable permeation device for the broken rock water and sediment two-phase seepage, testaccuracy and stability are improved, speed is adjustable, axial loading is finished, and water pressure is uniformly distributed on a broken rock sample.

Description

technical field [0001] The invention relates to the technical field of infiltration tests, in particular to a frequency conversion infiltration device for breaking rock mass water-sand two-phase seepage flow. Background technique [0002] For ecologically fragile mining areas, extensive coal mining will inevitably cause water-conducting cracks in the overlying rock to penetrate the surface, destroy the aquifer, and cause large-scale and large-scale dredging of the regional groundwater level, resulting in a large amount of mine water gushing. The serious loss of groundwater in the mining area and the death of large areas of vegetation have further deteriorated the already fragile ecological environment and seriously affected the safe and efficient mining of mines. Because shallow water and quicksand enter the mine when the roof is damaged, it will cause serious economic losses. In view of the general conditions of large-scale gobs and a large amount of mine water produced by...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems in the prior art that the seepage test process is complicated and does not consider the two-phase flow velocity of water and sand, the present invention provides a frequency conversion seepage device for water-sand two-phase seepage in broken rock mass, which improves the accuracy of the test and stability, the speed can be adjusted, which not only ensures the completion of axial loading, but also realizes that the water pressure is evenly distributed on the broken rock sample, and has good openness. The sand breaking mechanism provides an effective test method

Images