SU863860A1 - Stope-turning method - Google Patents

Description

(54) METHOD OF SPREAD CLEANING SPINS

one

The invention relates to the mining industry and can be used in the development of mineral formations, such as coal or potash.

There is a method of turning the bottom faces at the borders of the excavation floor, which includes carrying out workings and turning the faces 1.

There is also known a method of turning the bottom faces near the boundaries of the excavation floor, including external and internal bypass workings and the development of bottom faces from the spent extraction columns into the columns 2 to be developed.

However, these methods are not sufficiently effective when reversing paired faces with intermediate production.

The aim of the invention is to increase the efficiency of excavation under the specified conditions.

The goal is achieved by the fact that simultaneously with the external and internal bypass workings, intermediate bypass workings are carried out, while the latter in the area from the beginning to the end of the turn of the faces is shifted towards the external bypass workings; intermediate bypass production is shifted by the distance determined from the formula

de (V (f) 2 + f + 0,5- f - 0,5) t

where D-t is the offset distance, m;

i-total length of paired clearing

faces, m;

g - radius of curvature of the internal bypass workings, m.

fQ The method is carried out as follows.

When the mineral reservoir is developed, paired clearing faces at the approach to the borders of the excavation field conduct external, intermediate and internal bypass workings, while the bypass workings are shifted towards the external bypass workings in the area from the beginning to the end of the bottomhole reversal. The bypass output can be offset by the distance determined from the ratio D – E (y (–p) + t + 20 –f 0.5 - –0.5) t where D {- offset displacement, m; t is the total length of paired clearing faces, m; d is the radius of rounding of the internal bypass workings, m. The turn of the paired faces is carried out from the spent excavation pillars into the pillars to be worked without stopping the mining of mineral resources.

With the proposed reversal method, uniform loads are placed on the mining combines operating in the clearing holes, which increases the efficiency of excavation.

Claims (2)

1. The method of turning the bottom faces at the borders of the excavation floor, which includes carrying out external and internal bypass workings and turning the faces from the used mining columns into the columns to be worked, characterized in that, in order to increase the efficiency of the excavation when the paired bottom faces with intermediate production are increased, at the same time with By carrying out external and internal bypass workings, intermediate bypass workings are carried out, while the last from the beginning to the end of the turn of the faces is shifted towards the external bypass workings. 2. The method according to claim 1, characterized in that the intermediate bypass production is shifted by a distance determined from formulas L (f - 0.5) t where D is the offset distance, m; i - total length of paired clearing faces, m; g - radius of rounding of the internal bypass workings, m. Sources of information, taken into account in the examination 1. USSR author's certificate number 673735, cl. E 21 C 41/04, 1977. 2. USSR author's certificate j4o 578457, cl. E 21 C 41/00, 1976.