SU1656129A1 - Method of controlling deformation of undermined ground - Google Patents

Abstract

The invention relates to the construction and m. used to protect various surface structures in the undermined areas. The purpose of the invention is to reduce the labor costs for controlling the deformation of the earned array. Behind the protected structure, a slit (S) is made, which is filled with compliant material. Shch to the foundation depth of the structure and at a distance from it equal to half the foundation depth are performed. By drilling the dispersed wells around the U, a weakened zone is formed. The depth of the wells is determined from the ratio h {ln (Ai + / l p) - 1n ЈD p I I) where AI and p are the calculated strain rates and curvature of the array; Јd - allowable horizontal deformation of the array; I is the distance between u and the weakened zone. Well m. drilled with a distance between centers equal to 2-2.3 or 7-10 bore diameters. 2 hp ff, 3 ill. AND

Description

The invention relates to the construction and protection of various surface structures in the undermined territories.

The purpose of the invention is to reduce the labor costs for controlling the deformation of the earned array.

FIG. 1 and 2 depict a scheme for implementing the method; in fig. 3 - the same, in the case of finding a protected structure in the absence of underworking directly below it.

The deformation control is carried out as follows.

Behind the protected structure 1, a weakened zone 2 is formed around the pre-formed slit 3, which is filled with compliant material 4. The slit 3 is formed to the depth of foundation of building 1, at a distance of half the foundation depth of foundation. The weakened zone 2 is performed by drilling the dispersed wells, with a distance between their centers of 2-2.3 diameters of the wells. The depth of the wells is determined from the ratio

h -

1p (A1 + ЈрО-1p unit

n i

ABOUT

sl o

ND Yu

where AI and p are the calculated strain rates and curvatures;

Јd - allowable horizontal deformations;

I is the distance between the slit and the weakened zone.

Wells can be drilled with a distance between the centers equal to 7-10 of their diameters when the interwell wells are destroyed from the depth of slot 3.

For buildings and structures located in the marginal part of the displacement trough, when mining is not carried out directly under the structure, the slot 3 and the weakened zone 2 form within the displacement trough mold from the side of the side to the surface 5 of their displacement.

Claims (3)

Claim 1. Method of controlling the deformation of the produced massif, including making a gap behind the protected structure and filling it with a pliable material, characterized in that, in order to reduce labor costs, the gap is made to half the foundation depth of the structure foundation depths, and around the gap form a weakened zone by drilling dispersed wells, and the depth h of the wells is determined from the ratio ln (Ai + lpi) -lnfoJ I I where AI and p are the calculated strain factors and the curvature of the array, Јd - allowable horizontal deformation of the array; I is the distance between the slit and the weakened zone. 2. A method according to claim 1, characterized in that the wells are drilled with a distance between the centers of 2-2.3 their diameters. 3. The method according to claim 1, wherein that the wells are drilled with a distance between the centers of 7-10 their diameters and destroy the interwell bridges from the depth of the slot. Ltd  one o / o to o o o o o o o Figure 1 00 one o / o to. 2 Schig.Z