SU1550137A1 - Equivalent material for modeling a rock body - Google Patents

Abstract

The invention relates to mining and is intended to simulate the stress state of a rock mass. The goal is to expand the range of modeling the strength properties of rocks and increase the contrast of the image of the stress state on the model. Equivalent material contains components in the following ratio, wt.%: Powder magnet of soft material, coated with copper oxide 15-30

titanium oxide 7-12

binder 1-15

inert filler else. As a binder, use the composition containing the components in the following ratio, wt.%: Beeswax 50-60

shellac 30-40

shale resin 5-10. The composition is prepared by heating an inert filler in a sand bath to 120 ° C, and zinc oxide is added to the magnetically soft material. The mixture is thoroughly mixed. A binder is separately prepared: beeswax is melted in a thermostat and heated to 95 ° C, and then shellac powder and shale resin are added to it. The mixture is thoroughly mixed. The binder is then added to the filler, mixed and filled into the formwork of the model. Equivalent material allows you to simulate a wide range of rocks of varying strength with simultaneous fulfillment of the criteria for dynamic similarity on affordable and cheap materials.

Description

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(21) 4427470 / 23-03

(22) 05/18/88

(46) 03/15/90. Bksh. Number 10

(71) Leningrad Mining Institute. G.V.Plekhanova

(72) S.A. Tolstunov and T.S.Ivashkevich

(53) 622.23.05 (088.8)

(56) Kuznetsov G.N. et al. Modeling of rock pressure. L .: Nedra, 1968, p. 230-236.

- Nasonov I.D. Simulation of mining processes. M .: Nedra, 1969.

USSR author's certificate 934000, cl. E 21 C 39/00, 1982,

(54) EQUIVALENT MATERIAL FOR MODELING THE MASSIF OF MOUNTAIN BREEDS

(57) The invention relates to mining and is intended to simulate the stress state of a rock mass. The purpose of the invention is to expand the range of modeling the strength properties of rocks and increase the image contrast. stress state on the model. Equivalent material contains components in the following ratio,

May .: powder magnet soft material coated with copper oxide 15-30; titanium oxide 7-12; binder 1-15; inert filler - the rest. As a binder, use is made of a composition containing the components in the following ratio; May.%: Beeswax 50-60; shellac 30-40; Shale resin 5–10 ° C The composition is prepared by heating an inert filler in a sand bath to 120 ° C, zinc oxide and a magnetically soft material are added to it. The mixture is thoroughly mixed. A binder is separately prepared: beeswax is melted in a thermostat and heated to 95 ° C, and then shellac powder and shale resin are added to it. The mixture is thoroughly mixed. The binder is then added to the filler, mixed and filled into the formwork of the model. Equivalent material allows you to simulate a wide range of rocks of varying strength with simultaneous fulfillment of the criteria for dynamic similarity on affordable and cheap materials.

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The invention relates to mining and is intended to simulate the stress state of a rock mass.

The purpose of the invention is to expand the range of modeling the strength properties of rocks and increase the contrast of the image of the stress state on the model.

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This goal is achieved by the fact that the equivalent material is prepared on the binder, which has good internal polarization, preserves for a long time, and also provides the necessary ratios of the strength properties of the material and a similar pattern of destruction of the model.

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The equivalent material additionally contains a powder with a magnet of a soft material, a modifying additive based on titanium oxide and a mineral inert filler in the following ratio of ingredients, wt0%: Powder with a magnet of a soft material coated with copper oxide 15-30 Titanium oxide 7-12

Binding1-15

Inert filler Else As a binder, use the composition of beeswax, shellac and slate resin in the following ratio of ingredients, wt.% G Beeswax 50-60 Shellac 30-40

Shale resin 5-10 This material is a good binder and provides materials with specified properties in accordance with the laws of dynamic similarity. In addition, the material can retain internal polarization for a long time and is not inferior in its properties to the carnauba wax that serves as a binder in a known material.

The magnetically soft powder gives the equivalent material anisotropy of electromagnetic properties. Before preparing the equivalent material, the magnetically soft powder is annealed to remove residual stresses and then coated with a film of copper oxide, which is semiconducting (to eliminate conductive channels).

Any materials (quartz sand, gypsum, talc, etc.) suitable for the calculated density are used as inert fillers.

Equivalent material is prepared as follows.

In a sand bath, the inert filler is heated to 120 ° C, and zinc oxide and a soft material are added to it magnetically and mixed thoroughly. Separately prepared binder. In the thermostat, beeswax is melted and heated to 95 ° C, then shellac powder and shale resin are added to it. The mixture is thoroughly mixed. The binder is then added to the filler, mixed and filled into the formwork of the model. Between formwork

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and a model is used to lay an aluminum or brass foil, which subsequently serves as an electrode to polarize the material. The beginning of the polarization of the material is carried out from a source of constant or pulsed voltage (voltage of more than 1 kV / am) until the material is completely cooled. After the material has cooled down, the formwork is dismantled and a thin layer of dissolved polystyrene dissolved in solvents is applied to the models. Then the process of polarization of polystyrene is repeated for 5 minutes at the same voltage intensity.

Next, the model is worked out in the usual way, imitating the processes of mineral extraction.

Under the action of the stress state of the material of the model, its permeability changes, which in turn leads to a change in the intensity of the electric field on the surface of the model.

The most interesting moments of the model can be achieved by applying toner with rotating fur brushes. The brushes must be made of natural fur. The toner particles are electrified by friction on the surface of the fur hairs, acquiring the opposite charge, while the fur hairs simultaneously play the role of the carrier of the developer.

In places of tensile stresses after application of toner there are dark areas, and in places of compressing light areas. By the nature of the colored areas, the stress state of the material of the model is judged.

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The use of this material for studies of rock pressure manifestations allows visualization of the stress pattern in models operating in various modes, including in the beyond.

The goal is achieved on domestic cheap and not scarce compositions of equivalent materials, which opens up more opportunities for the researcher because of its availability. The qualitative picture of the developed image of the stressed state is not inferior to that obtained on the known material, and the contrast of the resulting image is 1: 4 with corresponding 515501376

1: 3 using lime as a modifying additive for the recipe. Keeps titanium oxide in the following

Claims (1)

The ratio of components wt.%: The formula of the invention. Binder based on Equivalent material for model beeswax 1-15 lithium rock mass, including - Powder magnet, boiling mineral inert filling material, coating, bonding agent and powder magnet copper oxide of 15-30 of which material coated copper oxide, titanium oxide 7-12 and modifying additive, mineralized inert by the fact that, for the purposeful filler, the rest of the expansion of the modeling range, and the binder based on the bee-strength properties of rocks and wax has the following composition increasing contrast Image details: wt%: stress state on the model, it Beeswax 50-60 as a binder contains St - Shellac 30-40 bee wax based, and Shale resin 5-10