A Sampling Method of Rock Mass Containing Weak Structural Plane

Abstract

The invention discloses a sampling method of rock mass with weak structure surfaces. The method comprises the following steps: selecting a sampling part with weak structure surfaces and chiseling the sampling part to form a plane; pre-marking a sample area on the sampling plane, wherein hard rock layers at the upper part and the lower part of a weak structure layer are equal in thickness; paving steel wires on the surface of the sample area and coating a protection layer; cutting inwards by taking the edge of the protection layer as a base line vertical rock wall to form a side surface and a back surface of the sample, and protecting all the surfaces; curing the cut samples on the site and grinding the samples to obtain samples which meet the size requirement; chiseling the protection layer of the weak structure layer, sealing and filling the samples and enabling the samples to maintain the water content on the sampling site; then transporting the samples to a laboratory, cutting off the steel wires paved on the surfaces, enabling the weak structure layer to be exposed, and filling the samples in a cutting box for carrying out experiment. The method is capable of simply and conveniently obtaining disturbance-free complete rock samples with the same water content of the site and can be used for directly detecting basic rheological properties of the rock indoors.

Description

technical field [0001] The invention relates to a rock mass in-situ sampling method, in particular to a rock mass sampling method with a weak structure plane. Background technique [0002] In the long process of geological evolution, the complete rock mass has been subjected to various tectonic geological actions, resulting in various weak structural planes, such as faults, interlayers, interlayer and intralayer dislocation zones, etc. These weak structural surfaces are filled with clay, mud and rock fragments, etc., and their strength is much lower than that of the intact rock mass, which directly controls the stability of the entire underground cavern. At the same time, after excavation and unloading, the free surface is formed, and the weak structural surface directly affects the deformation of large-scale rock engineering. The strength of weak structural surfaces is greatly affected by water content, so the experimental research on the basic rheological properties of su...

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: To provide a rock mass sampling method with weak structural planes in view of the existing rock mass sampling techniques that cannot obtain undisturbed rock mass samples, and the water content in the obtained rock mass samples is deviated from the field.

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