SU754061A1 - Composition for simulating rock - Google Patents

Description

(54) COMPOSITION OF MODELING MOUNTAIN BREEDS

one

The invention relates to the field of experimental methods for the study of stresses and deformations and is intended to investigate the mechanics of rocks, building structures and hydraulic structures.

Known equivalent materials are multicomponent mixtures based on fillers, binders, and modifying additives 1.

The disadvantage of these equivalent materials is a large internal friction angle.

Known. also a composition for rock modeling, containing a filler, epoxy resin, glycerin and polyethylene polyamine (PEPA).

The disadvantage of this equivalent material is a large friction angle, i.e. discrepancy between the angle of internal friction of shale and clay rocks.

The aim of the invention is to reduce 20 the internal friction angle.

The goal is achieved by the fact that the equivalent material contains as a filler cement and, additionally, petroleum jelly in the following ratio of components, weight, ° / o

Cement 78,6-82,2

Epoxy resin 3.5-5.9

Glycerin1.8-3.0

Polyethylenepolyamine 0.8-Iv3

Vaseline11,2-11,7

The higher the degree of dispersion and less roughness, the lower the angle of internal friction of the medium. The type of the binder, on the contrary, does not have a significant effect on the angle of internal friction.

Cement is a high dispersion filler. Its granulometric composition is characterized by the following main fractions: 0.16mm -36%; 0.10mm -24%; 0.063mm - 22%; 0.050 mm - 10%. The specific surface of the cement is 4000 cm / g.

It is proposed to use a polyethylene polyamine hardener epoxy resin and an active plasticizer glycerin as a binder of finely dispersed cement.

Claims (2)

The binder composition is selected empirically, based on the need to ensure the proper curing speed of the mixture. It contains glycerin in the amount of 50 ppm, resin and polyethylene polyamine in the amount of 15 pph. on the 100th century blends of resin with glycerin. To ensure the compatibility of fine cement with the epoxy binder, a vaseline modifier (medical) is additionally introduced into the mixture. Without it, the resin does not wet the solids, and after surface treatment of the cement with petroleum jelly in the mixer, the wettability of the particles with the resin significantly improves and the resulting mixtures of cement with the resin have a fairly high level of homogeneity (non-uniformity factor 2-4%). The amount of vaseline is 143 cc. per 100 v.ch cement. Cement-vaseline mixture should not contain particles of 1 mm or more. Example. A cement-petroleum jelly mixture is preformed, for which 1.43 kg of petroleum jelly is added to 10.0 kg of cement loaded into the mixer. Transferring is done for 20 minutes at room temperature. The resulting mixture is sieved on a sieve to remove particles of 1 mm or more. 10kg of the sifted mixture (it contains: cement 8.75kg (82.2%) and vaseline 1.25kg (11.7%), is re-loaded into the mixer. Then 0.372 kg (3.5%) of epoxy resin is introduced, 0.186 kg (1.87 o) of glycerol and 0.082 kg (0.8%) of PEPA. The binder is prepared immediately before its introduction into the vaseline cement mixture, and the pre-binder is kept at room temperature (until its temperature reaches 50 ° C). C). When introducing the binder into the mixture, the rotors should rotate. The duration of the filler mixing with the binder is 10 minutes, after which the mixture is loaded and compacted by a known method. Characteristics of the mixed components: cement - grade 400, powder contains fractions of 0.05-0.20 mm; medical vaseline, melting point 36-40 ° C; epoxy resin - grade DEG-1, epoxy content groups 28.0%; glycerin - qualifications "x. PEPA - liquid, nitrogen content 32%. The compressive strength of the material produced is 0.4 kg / cm2, the internal friction angle is 23 °. As a result of the application of the proposed material, the range of mining engineering problems solved by modeling method, expand on pas you are made of clay and shale rocks. It. will allow more reasonably transfer the results of laboratory studies of mining dazlenia to the appropriate natural conditions and to obtain an economic effect by increasing the validity of the parameters of workings. Claims of composition Composition for modeling rocks containing filler, epoxy resin, glycerin and polyethylene polyamine, characterized in that, in order to reduce the angle of internal friction, it contains cement and, in addition, petroleum jelly in the following ratio of components, wt.%: Cement 78 , 6-82.2 Epoxy resin3.5-5.9 Glycerin1.8-3.0 Polyethylenepolyamine8.8-1.3 Vaseline11.2-11.7 Sources of information taken into account during the examination 1. Kuznetsov G. N . et al. Modeling of the occurrence of rock pressure. L., “Nedra, 1968, p. 51. 2. USSR author's certificate number 557076, cl. C 04 B 25/02, 1975 (prototype).