SU1523683A1 - Method of determining rock-bump hazard - Google Patents

Abstract

The invention relates to mining and can be used to determine the degree of impact hazard of an array of rocks. The purpose of the invention is to improve the accuracy of determining the degree of shock hazard of rock sections by taking into account the magnitude and directions of action of maximum stresses. The well is drilled (C) and the interval pressing of the punch in three directions at an angle of 120 ° to each other in a plane perpendicular to the C axis. For each indentation, the coefficient of impact hazard (CI) is calculated. In the interval with the minimum KU value, the values of stresses (H) in three directions and the angle between the direction of indentation and the direction of action of the maximum H are determined. Orient the punch in C at this angle to the direction of the first indentation and produce an indentation. Then KU is calculated and the degree of impact hazard of a section of the rock mass is determined by criteria values.

Description

The invention relates to mining and can be used to determine the degree of shock hazard of sections of a rock massif.

The aim of the invention is to improve the accuracy of determining the degree of impact of rock sections by taking into account the magnitude and direction of the maximum stress.

The method is carried out as follows.

In the studied area of the rock mass, the well is drilled and interval punching is made.

the MHD instrument in the depth of the well in three directions in a plane perpendicular to the axis of the well, at an angle of 120 ° to each other. Then, for each indentation in the interval of calculation, the coefficient of impact hazard K h, d. Is calculated by the formula

sd e

Od

but

00

with

TO

HA

f

where 1 is the amount of indentation to

the moment of destruction; 1 .. is the amount of indentation when released;

P - contact strength of the mountain

breeds;

Р - contact strength of the unloaded array „

In the interval with the smallest values of Kd, the stresses are determined at points indented by the formula

. t 0,125 (Р „-Р).

Calculate the angle, 0, between the direction of indentation and the direction of action.

 one,,.

where (6 ,,; and 6i, are the stresses, changes,

rented in three directions x-; Vani.

Then the instrument punch is oriented at an angle of 0 to the direction of the first indentation, the indentation is made, K beats are calculated, and the degree of impact of a section of the rock mass is determined by criteria; at K ,,, 4 - I degree of shock hazard, at 0.4 C K x | d 1.0 - II degree of shock hazard, - at Кч, д, 0. Stage III. This takes into account the distance from the exposure to the interval with a minimum value of K, j, i.e. The boundary of the hazardous zone deep in the massif, Forum and Invention was invented to the method for determining the impact hazard of rocks, including drilling a well, conducting an indentation of a punch in its wall, determining the indicators of injection and determining the impact factors for H1N, determining The punching interval of a punch with a usable impact hazard coefficient and an assessment of the degree of impact hazard of a section of the rock mass for this coefficient, characterized in that, in order to improve the accuracy of determining No impact of the rock section by taking into account the magnitude and direction of the maximum stress, the interval indentation of the punch is made in 7 directions at an angle of 120 ° to each other in a plane perpendicular to the borehole axis, and in the interval with the least impact factors, stress and the direction of action of the maximum voltage, and re-indening the pointe, determining its parameters, the impact factor and determining the degree of impact hazard on it direction of action of the maximum voltage.

Claims (1)

Forumula was also invented. A method for determining the shock hazard of rocks, including drilling a well, conducting a punch indentally into its wall, determining indentation indices and establishing impact hazard coefficients, determining the punch indentation interval with the lowest impact hazard coefficient and evaluating this coefficient of the degree of shock hazard of a section of a rock mass, characterized in that, in order to improve the accuracy of determining the degree of shock hazard of a rock mass by and the magnitude and direction of action of the maximum stress, the punctual indentation of the punch is performed in three directions at an angle of 120 ° to each other in the plane perpendicular to the axis of the well, and in the interval with the lowest impact hazard coefficient, the magnitudes of the stresses and the direction of action of the maximum stress are determined, and the repeated indentation of the punch, the determination of its parameters, the coefficient of shock hazard and the establishment of the degree of shock hazard in it are carried out in the direction of the maximum voltage.