Test device and method for simulating fractured rock secondary diagenesis

Abstract

The invention discloses a test device and method for simulating fractured rock secondary diagenesis. The test device is composed of an axial compression disc, a confining pressure device, a chassis and a confining pressure applicator. The method comprises putting fractured rock into the test device, applying vertical pressure to the device through a rock mechanical test system, and recording pressure valve change cases to obtain fractured rock secondary regenerated rock and to know mechanical parameters in the whole secondary diagenesis process. The device and method realize simulation of fractured rock secondary diagenesis and convenient research of mechanical parameters of the fractured rock during the secondary diagenesis, can carry out a later mechanical test on the rock subjected to secondary diagenesis, and provides the reliable theoretical basis for retaining and protecting the secondary diagenesis of the fractured rock under a mine so that the engineering practical retaining and protecting design satisfies the mechanical properties of the rock.

Description

technical field [0001] The invention relates to a rock mass test device and method, in particular to a test device and method for simulating secondary diagenesis of broken rock mass. Background technique [0002] As the mining of mineral resources goes deep, the surrounding rock support of the mine faces more and more complex broken rock masses and regenerated rock masses that are compacted and consolidated by the broken rock masses and secondary diagenesis. This regenerated rock mass, which is compacted and consolidated through broken rock mass and secondary diagenesis, has quite different internal mechanical parameters from the original coal rock mass, so different support methods are also required for support. In order to study the mechanical parameters of this kind of regenerated rock mass, it is generally necessary to carry out mechanical tests of this kind of regenerated rock mass in the laboratory. After the law of its mechanical parameters is obtained, it can play a ...

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Problems solved by technology

At present, the laboratory can only take out the original broken-consolidated regenerated rock mass from the mine to test its mechanical performance parameters, but this sampling process is very troublesome, and the broken-consolidated regeneration will also occur after cutting. The mechanical parameters of the rock mass are affected, so the data measured in the laboratory are not accurate

Since there is no equipment or device to reproduce the secondary diagenesis process of the broken-consolidated rock mass and monitor the mechanical behavior of the rock mass related to the secondary diagenesis, there is a lack of reliable theoretical basis for the support of this broken-consolidated rock mass , the support design in engineering practice has a large blindness

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