SU420905A1 - METHOD FOR DETERMINING THE RESISTANCE TO THE SHEAR OF ROCK ROCKS BY CRACKS - Google Patents

METHOD FOR DETERMINING THE RESISTANCE TO THE SHEAR OF ROCK ROCKS BY CRACKS

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Publication number
SU420905A1
SU420905A1 SU1695485A SU1695485A SU420905A1 SU 420905 A1 SU420905 A1 SU 420905A1 SU 1695485 A SU1695485 A SU 1695485A SU 1695485 A SU1695485 A SU 1695485A SU 420905 A1 SU420905 A1 SU 420905A1
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SU
USSR - Soviet Union
Prior art keywords
cracks
shear
determining
resistance
rock
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Application number
SU1695485A
Other languages
Russian (ru)
Original Assignee
С. Е. Могилевска
Всесоюзный научно исследовательский институт гидротехники Б. Е. Веденеева
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Application filed by С. Е. Могилевска, Всесоюзный научно исследовательский институт гидротехники Б. Е. Веденеева filed Critical С. Е. Могилевска
Priority to SU1695485A priority Critical patent/SU420905A1/en
Application granted granted Critical
Publication of SU420905A1 publication Critical patent/SU420905A1/en

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Description

1one

Известиый способ определени  сопротивлени  сдвигу скальных пород по сомкнутым трещинам путем нахождени  непосредственно опытами иа сдвиг иа образцах породы угла трени  и сцеплеии  трудоемок и не раскрывает характерных свойств трещин породы, от которых зависит ее сопротивление сдвигу по этим трещииам.The well-known method of determining rock shear resistance over closed cracks by finding the friction angle and adhesion of rock samples directly by experiments on the shear of rock samples is laborious and does not reveal the characteristic properties of rock cracks on which its shear resistance depends on these cracks.

Цель изобретени  - уменьшение трудоемкости и повыщение точиости измерений.The purpose of the invention is to reduce the labor intensity and increase the accuracy of measurements.

Достигаетс  это тем, что многократно сдвигают при возрастаюн их нормальных напр жени х образцы породы с гладкой поверхностью трещины при возрастающих нормальных напр жени х н определ ют угол трени  самого материала; измер ют но профилограмме поверхность естественной трещины и определ ют угол наклона выступов микрощероховатой поверхности трещины; однократно в лаборатории сдвигают образцы по трещине при прин том нормальном напр жении, определ ют зпачеиие предельного сопротивлени  сдвига и по определенным ранее показател м вычисл ют сопротивление сдвигу.This is achieved by the fact that rock specimens with a smooth surface of a crack with increasing normal stresses n increase the angle of friction of the material itself when they increase their normal stresses; but the profilogram measures the surface of a natural crack and determines the angle of inclination of the protrusions of the micro-rough surface of the crack; once in the laboratory, the specimens are shifted along the fracture under normal stress conditions, the increase in the ultimate shear resistance is determined, and shear resistance is calculated from the previously determined parameters.

Рабочий процесс определени  сопротивлени  сдвигу скальных пород по предлагаемому способу осуществл ют следующим образом: параметры сдвига ф и С наход т дифференцировано с учетом как свойств самого материала , так и щероховатости его трещин. При этомThe working process for determining the shear resistance of rocks by the proposed method is carried out as follows: the shear parameters φ and C are differentiated taking into account both the properties of the material itself and the roughness of its cracks. Wherein

наход т, что угол трени  ф представл ет собой сумму двух углов ф фо+а.it is found that the friction angle φ is the sum of the two angles φ f0 + a.

Параметр фо - угол трени  самого материала - определ ют лабораторными опытами путем многократных сдвигов при различных возрастающих нормальных напр жени х S на образце породы по трещине с гладкой поверхностью , получепной, например, его распилом.The parameter fo, the friction angle of the material itself, is determined by laboratory experiments by multiple shifts at various increasing normal stresses S on a rock specimen along a crack with a smooth surface, which is obtained, for example, by cutting it.

Параметр а - угол наклона выступов макрощероховатости поверхности трещины - определ ют по профилограмме этой поверхности.The parameter a — the angle of inclination of the protrusions of the macroscopic roughness of the crack surface — is determined from the profilogram of this surface.

Параметр С, завис щий от микрощероховатости , определ ют следующим образом.A micro-roughness dependent parameter C is determined as follows.

Производ т однократные сдвиги но трещине на образцах породы и получают значение предельного сопротивлени  сдвигу Тпр, отвечающее прин тому в опыте значению б по определенным ранее значени м фо и а из зависимости (фо+а)+С определ ют сцепление .One-time shifts are made on the fracture of rock samples and the value of the limiting shear resistance Tpr is obtained, which corresponds to the value of b obtained in the experiment by the previously determined values of pho and a grip is determined from the relation (fo + a) + C.

Предмет изобретени Subject invention

Способ определени  сопротивлени  сдвигскальных пород по трещинам посредством измерени  угла трени  и сцеплеии , отличающийс  тем, что, с целью уменьщени  трудоемкости и повыщени  точиости измерений, многократно осуи;ествл ют сдвиг образцов породы с гладкой поверхностью трещины при возрастающих нормальных напр жени х с од34The method for determining the shear resistance of rocks through cracks by measuring the friction angle and adhesion, characterized in that, in order to reduce the labor intensity and increase the accuracy of measurements, the axes of the rock samples are shifted with increasing normal stresses with a uniform 34

повременным измерением угла трени , затемне при прин том нормальном нанр жепии сtime measurement of the friction angle, darkened when the normal nanorjapii is received with

определ ют угол наклона выстунов макроше-онределением предельного сопротивлени  сдвнроховатой поверхности трещины, после чегогу и по полученным ноказани м вычисл ютthey determine the angle of inclination of the macrostones by the macroscopic determination of the limiting resistance of the fractured surface of the crack, after which, and from the obtained evidence,

однократно сдвигают этот образец по трещи-сопротивление сдвигу.this sample is shifted once by cracking-shear resistance.

420905 420905

SU1695485A 1971-08-13 1971-08-13 METHOD FOR DETERMINING THE RESISTANCE TO THE SHEAR OF ROCK ROCKS BY CRACKS SU420905A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1695485A SU420905A1 (en) 1971-08-13 1971-08-13 METHOD FOR DETERMINING THE RESISTANCE TO THE SHEAR OF ROCK ROCKS BY CRACKS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1695485A SU420905A1 (en) 1971-08-13 1971-08-13 METHOD FOR DETERMINING THE RESISTANCE TO THE SHEAR OF ROCK ROCKS BY CRACKS

Publications (1)

Publication Number Publication Date
SU420905A1 true SU420905A1 (en) 1974-03-25

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SU1695485A SU420905A1 (en) 1971-08-13 1971-08-13 METHOD FOR DETERMINING THE RESISTANCE TO THE SHEAR OF ROCK ROCKS BY CRACKS

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SU (1) SU420905A1 (en)

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