RU1810546C - Method for driving development workings - Google Patents

Abstract

Usage: the invention relates to mining and can be used in underground mining of mineral deposits at great depths. SUMMARY OF THE INVENTION: Preparatory workings extend parallel to the bedding planes of the rock layers in the locks of plicative folds. When unstable rocks are deposited in the top of the formation, preparatory workings pass without breaking the continuity of these layers in the castles of the folds facing upward bends, and when unstable rocks occur in the formation soil pass in the locks of folds facing downwards. 3 ill.

Description

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The invention relates to mining and can be used to solve issues related to improving the stability of underground mine workings during the development of reservoir mineral deposits.

The purpose of the invention is to reduce the cost of maintaining and conducting mine workings ...

The essence of the claimed method is explained by the description below and the schemes attached thereto, where in Fig. 1: m is a coal seam; gee. PG - rock layers in the soil of the reservoir: XL ka, KZ. m - rock layers in the roof of the reservoir; A - locks of plicative folds facing upward bends; B - locks of plicative folds facing downward bends; figure 2 - lock plicative folds facing the bend up (3

- preparatory development, 4 - a layer of unstable (weak) rocks in the roof of the reservoir); in Fig.3 - the same, facing downward bend (5 - preparatory development, 6 - layer of unstable (weak) rocks in the soil of the formation) ..

The method is carried out as follows. The main elements of formation occurrence (dip lines, strike lines, dip angles, and physical and mechanical properties of roof rocks and formation soils) are determined. Knowledge of the bedding elements in various areas allows the location of plicative folds to be determined. Knowledge of the physicomechanical properties of the host rocks allows one to determine the limiting exposure of the roof and soil rocks and their tendency to deform and fracture, which ultimately allows

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In each case, evaluate the stability of the roof and soil rocks.

Preparatory workings 1, 2 of FIG. 1 are carried out in the locks of the plicative folds of rock layers parallel to the osplicative folds. Carrying the workings parallel to the ridge of the pleat folds makes it possible to increase the stability of the workings along their entire length.

When laying in the roof of the preparatory workings of the layers of unstable rocks 4 (Fig. 2), the workings pass without breaking the continuity of these layers in the locks of the folds facing upward bends (Fig. 2), which improves the stability of the roof layers as bearing rock structures. Laboratory and mine studies have shown that even in cases when roofing rocks are destroyed under the influence of mountain pressure, hinge systems having high stability are formed from the rock blocks (Fig. 2).

When the preparatory workings of the layers of unstable rocks 6 lie in the soil (Fig. 3), the workings pass without violating the continuity of these layers in the fold locks facing downward bends, which reduces the intensity of soil heaving of the preparatory workings. This is explained by the fact that the horizontal stresses in the soil of the workings passed in the castles of the plicative folds, o6pauienHbtx with a downward bend, are less than the values of the corresponding stresses in the soil of the workings passed outside the folds of the folds.

Reducing the cost of carrying out preparatory workings is achieved due to the fact that when implementing the claimed method, lightweight supports can be used. In addition, a reduction in rock displacements in the workings allows smaller workouts to pass through. .

A statistical analysis of mine research data for the mines of the East Donbass showed that

no roofing rocks in the preparatory workings of the plicative folds passed in the locks facing upward, 30–70% less, and soil rock heaving in the workings passed in the casting folds castles facing downward, 20-40% less than the corresponding values workings completed outside areas with plicative impairment.

The proposed method allows to reduce the cost of maintaining preparatory workings, run parallel to the planes of non-formation of rocks, in 1.2-1.7

time. Mining costs are reduced by 15-25%.

This method can be used to increase the stability of slopes, bremsbergs, slope walkers and bremsbergs, as well as local workings maintained in an untouched mass or guarded by pillars of coal.

Claims (1)

The claims A method of conducting preparatory mine workings, including determining the basic elements of the bedding and the physicomechanical properties of the roof and soil rocks, breaking the rock, cleaning the rock, installing variable and constant supports, and so on, and so on which, in order to reduce maintenance costs and. sinking of the preparatory workings conducted parallel to the planes on the rock formation, preparatory workings take place in the castles of plicative folds parallel to the axes of these folds, and when unstable rocks lie in the roof of the formation, workings pass without breaking the continuity of these layers in the locks of plicative folds facing upward bends, and when layers of unstable rocks occur in the soil of the formation, preparatory workings pass without breaking the continuity of these layers in the locks of plicative folds facing downward bends.