A similar material combination and method for preparing simulated fold structures

Abstract

The invention discloses a combination of similar materials for preparing a simulated fold structure and a method thereof. The similar materials include: 15%-37.5% fine sand, 37.5%-60% gypsum powder, 1%-4 % white latex with water. According to the mass percentage, the second similar material includes: 15%-37.5% coal powder, 37.5%-60% gypsum powder, 1%-3% white latex and water. Both similar materials can be matched with corresponding auxiliary materials, such as 1%‑2% borax, 0.5%‑1% saponified oil, 1%‑2% mica powder, 0%‑2% iron powder, 0%‑2 % of fine wood chips and 0.5%‑1% of starch paste. It has strong deformability in the early stage and can simulate the extrusion formation of the fold structure. The fold structure model prepared in the later stage has stable rock mechanical properties and can bear a certain strength. It can realize mechanical tests and simulations of rock engineering to meet the test requirements. The laboratory studies the need for stability control of surrounding rocks in folded tectonic regions.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a combination of similar materials for simulating a folded coal seam structure and a preparation method thereof, and is mainly used for the preparation of a small model of a folded structure and the excavation of roadways and similar material tests for coal seam mining. Background technique [0002] A considerable proportion of coal resources in the strata are stored in the folded geological structure, but rock bursts often occur near the folded structure, and the folded structure can affect the stress intensity of the coal body and the stability of the mining project, thus bringing great harm to the mining of coal mines. Certain difficulties, which seriously restrict the safe, efficient and healthy development of coal mines. However, the stress distribution and stability analysis of the fold zone has only made some progress in numerical simulation, and there is a lack of corre...

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Problems solved by technology

[0012] The above materials can be used for the simulation of fold structures, which can well reflect the evolution process and genetic mechanism of the fold structure, but the materials mainly composed of quartz sand are relatively loose and have poor integrity, so it is difficult to prepare model test blocks; the above materials can be As a material similar to geological models, it is not suitable as a material similar to rocks; the fold models are often accompanied by fault phenomena, and the models cannot be taken out or moved, and do not have the strength of later loading. Generally, they are not used for mechanical experiment analysis of small model specimens in the laboratory. Also not suitable for engineering simulations such as roadway excavation or coal seam mining

Moreover, the properties of the above materials are quite different from those of coal rock mass, so they are not suitable as similar materials for coal rock mass.

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