SU1453032A1 - Method of forming a vertical separating enclosure between ore body and goaf - Google Patents

Abstract

The invention relates to mining promet and m. B. used in the development of ore deposits development systems with the laying of the goaf with hardening mixtures. The goal is to reduce the cost of fencing. Before laying the production space, on the ore board 2, the openings 1 of the fence 3 between the ore and backfill array 4 are formed by depositing a hardening composition of polymer foam on board 2. As a foam, you can use a fast-hardening polymer foam (BTP). BTP is applied in a downward direction with an increase in its multiplicity. The multiplicity of BTP is understood as the ratio of the volumes of the prepared BTP to the volume of substances used for its preparation. The multiplicity of the BTP is determined from the formula Kk (B / p-g) X X1 // g where Kh is the multiplicity of the BTP at the depth L; / J depth of bookmark layer, m; B is the empirical coefficient depending on the composition of the BTP, kg / m p is the density of the bookmark, g is the acceleration of free fall, m / s. 3 il. i SL

Description

1

The invention relates to the mining industry and can be used in the development of ore deposits of the system M1I development with the laying of the worked-out space with hardening mixtures.

The aim of the invention is to reduce the cost of forming a fence.

FIG. Figure 1 shows the layer on which foam is applied, a vertical section; in fig. 2 is a graph of the strength of the PN (0 /,) versus its multiplicity (/ SL); in fig. 3 is a graph of foam multiplicity (/ SL) versus bookmark layer depth L.

The essence of the method is the following.

Before laying the mined-out space, for example, the space of the depleted layer 1 at the upstream development system, a barrier 3 between the ore and filling mass 4 is formed on the ore board 2 by depositing a hardening composition of polymer pins on board 2. As a foam, you can use fast-hardening polymer foam (BTP), the second can be applied to the sides of the workings using a foam-generating installation

(PSU).

When BTP is applied to the ore board of the developed space, its multiplicity is increased by changing the consumption of components in the bottom-up direction (in Fig. 1 it is shown with a spiello). By brevity foam is meant the ratio of the volumes of the prepared BTP to the review of the substances that went to prepare it. For BTP-type foams, the multiplicity is usually 20-60 (the number of times). Moreover, the multiplicity of foam calculated by the formula

/ C

6

h

9-g

where Kh is the foam multiplicity at a depth h is the depth of the bedding layer, m;

L;

c is the empirical coefficient depending on the composition of the polymer foam;

p is the density of the bookmark, g is the acceleration of free fall,

M / cl

Claims (1)

Invention Formula A method of forming a vertical dividing barrier between the ore and depositing arrays, including applying to the ore array a hardening composition of polymer foam, characterized in that, in order to reduce the cost of forming the fence, the application of foam is produced with an increase in its multiplicity in direction from the bottom up, the foam multiplicity being determined from the formula and P K, -Jr-, -p-g 5 where Kh is the foam depth at the depth L (the ratio of the volumes of the finished foam to the volume of the components that went to its preparation); fi is the depth of the bookmark layer, m; B is an empirical coefficient depending on the composition of the polymer foam, p is the density of the bookmark g - free fall acceleration, m / s. BUT 60 50 50 20 0.05 0.0 0.05 0.06 6, mLa FIG. 2 Compiled by L. Berezkina Editor A. ShandorTehred I. VeresKorrektor V. Girn to Order 7148/27 Circulation 449 Subscription VNIIPI USSR State Committee for Inventions and Discoveries P3035, Moscow, Zh-35. Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4