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Ore rock similar material for model test for transferring open pit mining into underground mining

An open-pit-to-underground technology with similar materials is applied in the field of experimental models that take into account the similar materials of the ore body and the surrounding rock mass and fault simulation materials. Complicated and other issues, to achieve the effect of short maintenance period, simple production process and good gloss

Inactive Publication Date: 2012-10-03
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are few studies on the physical model of open-pit to underground mining, and the existing model materials more or less have the following shortcomings: such as the strength of the model material is too large to meet the similarity ratio of small-scale engineering entities, the type of simulated rock mass is relatively single, and the fabrication The process is relatively complicated, the material cost is high and the source is inconvenient, etc.
Many foreign researchers use the method of varnish mixed with grease and talcum powder to simulate the bonding surface. The structural surface simulated by this method has a high friction coefficient and cohesive force, but due to temperature changes and spraying processes, it will affect the bonding performance. The impact of the results, large dispersion of results, poor stability
The Institute of Long Sciences, Tsinghua University, etc. use paper with different smoothness to simulate the fault structure surface, and the simulation effect is better, but the paper is easy to absorb moisture, so it is only suitable for fault simulation under dry conditions

Method used

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  • Ore rock similar material for model test for transferring open pit mining into underground mining
  • Ore rock similar material for model test for transferring open pit mining into underground mining
  • Ore rock similar material for model test for transferring open pit mining into underground mining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The ore body in this embodiment and the similar materials of the upper and lower surrounding rock masses are composed of the following components:

[0036]

[0037] The preparation method of similar materials of the ore body and the surrounding rock mass is as follows: 1. Weigh the main aggregate according to the above ratio and mix it fully in the cement mortar mixer; 2. Add cementing materials and additives in sequence, and continue stirring for 3-5 Minutes; 3. Pour the mixed material into the steel mold and compact it into shape; 4. Remove the mold, put the prepared model into the oven, and maintain it at a constant temperature of about 30 degrees for 7 days.

[0038] The ore body obtained in this example and the similar materials of the upper and lower surrounding rock masses can reach a maximum density of 2.84 g / cm 3 , suitable for simulating marble. The uniaxial compressive stress-strain curves of the ore body and the similar materials of the upper and lower s...

Embodiment 2

[0045] The ore body in this embodiment and the similar materials of the upper and lower surrounding rock masses are composed of the following components:

[0046]

[0047] In this embodiment, the preparation method of similar materials for the ore body and the upper and lower surrounding rock masses is consistent with that in Embodiment 1. The ore body prepared in this embodiment and the similar materials of the upper and lower surrounding rock bodies are suitable for simulating marble. The uniaxial compressive stress-strain curves of the ore body and the similar materials of the upper and lower surrounding rock masses obtained in this embodiment are as follows: figure 2 As shown, its compressive strength and elastic modulus can reach up to 0.91 Mpa and 186Mpa.

[0048] The fault simulating material is a polypropylene film, and the fault simulating material is prepared according to the same method as in Example 1. In this embodiment, the ratio of water to white latex is ...

Embodiment 3

[0050] The ore body in this embodiment and the similar materials of the upper and lower surrounding rock masses are composed of the following components:

[0051]

[0052]

[0053]In this embodiment, the preparation method of similar materials for the ore body and the upper and lower surrounding rock masses is consistent with that in Embodiment 1. The ore body obtained in this example and the similar material density of the upper and lower surrounding rock masses are 2.84 g / cm 3 , suitable for simulating marble. The uniaxial compressive stress-strain curves of the ore body and the similar materials of the upper and lower surrounding rock masses obtained in this embodiment are as follows: image 3 As shown, its compressive strength and elastic modulus can reach up to 0.19 Mpa and 54.1Mpa.

[0054] The fault simulating material is a polypropylene film, and the fault simulating material is prepared according to the same method as in Example 1. In this embodiment, the rat...

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Abstract

The invention provides an ore rock similar material for a model test for transferring open pit mining into underground mining. The ore rock similar material at least comprises an ore body and upper and lower bottom wall surrounding rock body similar material and a fault simulation material, wherein the ore body and upper and lower bottom wall surrounding rock body similar material is formed by mixing and curing main aggregate, a cementing agent and additive; the main aggregate comprises barite powder and quartz sand and one of iron ore powder and reduced iron powder; the cementing agent is unsaturation resin and gypsum; the additive at least comprises glycerol and water; and the fault simulation material is a polypropylene film and is adhered to the ore body and upper and lower bottom wall surrounding rock body similar material. According to the similar material, the defects in the prior art are overcome; the ore rock similar material is low in preparation cost, stable in performance,easy to prepare, and short in curing period; the raw materials are wide in source and low in price and does not have any toxic or side effect; and scientific basis is provided for research on the relative scientific technology for realizing safe working of a mode of transferring open pit mining into underground mining.

Description

technical field [0001] The invention relates to an ore-rock similar material used in a model test of open-pit to underground mining, in particular to an experimental model that takes into account the ore body, the rock mass similar material around the upper and lower walls, and the fault simulation material. Background technique [0002] Open-pit to underground mining is an inevitable trend in the development of open-pit mines at home and abroad. During the mining process, high and steep open-air slopes and underground mining interact and restrict each other. The existence of high and steep open-air slopes affects the safety of underground mining, and underground mining also affects the stability of slope engineering. Its mutual influence mechanism is the basis and theoretical basis to ensure safe production in mines, and physical model test is an important means of its research. Physical simulation test technology is an effective means to conduct scale-down research on spe...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B14/06
Inventor 周传波张定邦孙金山贺丹张志华苗高建蒋楠
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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