Water-containing gangue compression testing device and testing method thereof

Abstract

The invention discloses a water-containing gangue compression testing device and a testing method thereof. The water-containing gangue compression testing device comprises a steel barrel for storing gangues, wherein the steel barrel is divided into a plurality of layers from the whole height; a pressure sensor and a stay wire displacement sensor are arranged on each layer; the steel barrel is put on a testing machine to be subjected to a compression test so as to obtain a compression ratio and force magnitude relation of gangues on different-height layers; the same batch of gangues are tested again, but the difference is as follows: a fixed amount of water is injected at the height of a certain layer, and a compression test is carried out; the compression ratio and force magnitude relations of the gangues before and after the water is added are compared to obtain the influences on a compression process by the moisture content of the gangues on the certain layers; by that analogy, a plurality of times of tests are carried out to obtain the influences on the compression process by the moisture content of the gangues at different-height positions. The water-containing gangue compression testing device and the testing method thereof, disclosed by the invention, not only can be used for underground engineering of gangue mining with filling and the like, but also can be used for the fields of building and traffic engineering including geotechnical side slope stability analysis, gravel foundation treatment, roadbed deformation calculation and the like.

Description

technical field [0001] The invention relates to a gangue compression test device and a test method thereof. Background technique [0002] In order to achieve green mining and ensure the coordinated development of coal mining and environmental protection, mining scholars and engineering technicians have proposed the filling mining technology, that is, filling materials such as gangue, fly ash, and paste are filled to the working face as the coal mining face advances. Mining technology in the rear goaf. The use of gangue filling mining technology can control the movement of rock strata and surface subsidence, so that gangue does not go up the well, reduce ground gangue piles, save a lot of land, effectively suppress the dynamic phenomenon of coal seam and roof and floor, protect the ecology of the mining area, and achieve safe production. In gangue filling mining technology, gangue is a kind of bulk material, which is directly filled into the goaf as a permanent support. Unde...

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Problems solved by technology

[0004] Chinese patent application CN203053782U discloses a gangue filling test compression mold, which mainly performs compression tests on loose gangue. It has a single function and does not consider the compression characteristics of gangue at different water contents, and how to measure the compression amount and force of gangue at different heights. size

In the above technology, although the compression test of crushed coal rocks with different water contents can be carried out, water exists in the whole sample gangue during the test, and the water content of gangue at different heights is not considered, and it is impossible to measure the water content at different heights. The amount of compression and the force of the gangue at the position

[0006] On the other hand, the gangue compression test method in the prior art cannot meet the requirements of studying the influence of the water content of gangue at different heights on the compression process while performing the gangue compression test, and measuring the compression amount and affected amount of gangue at different heights in real time. force size

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