SU1710738A1 - Method of mining mineral deposits - Google Patents

Abstract

This invention relates to the development of variable-power deposits. The goal is to reduce the cost of laying while maintaining safe conditions for the operation of objects on the earth's surface. Pass t preparatory and rifled workings. Extraction of minerals is carried out by excavation units and form roof exposures. The excavation capacity permissible by the conditions of surface working and the stable area of the roof exposures are determined. They carry out mining by excavation units of land deposits with a capacity of more than the permissible power with a stable area of roof exposures. Partial laying of the worked-out area of the waste plots is carried out by an amount determined by the calculation formula, and overburden the overburden. Then, areas of less than permissible capacity are worked out, and in the resulting voids they form a free developed space.

Description

The invention relates to the mining industry and can be used in the underground mining of ores with variable power mining systems with the laying of the goaf.

 There is a method of mining, including the excavation of minerals and gidrozakladku waste, cleaning space 1.

The disadvantage of this method is the considerable cost of back-up work.

The closest in technical essence and the achieved result is

The method of development includes the excavation of the mineral at the full capacity of the ore body and the laying of the developed space into incomplete capacity 2.

The disadvantage of this method is also the increased cost of laying the cleaning chambers.

The purpose of the invention is to reduce the cost of laying while maintaining safe operating conditions of objects on the earth's surface.

The goal is achieved by the fact that in the method of developing mineral deposits, including the carrying out of preparatory and rifled workings, excavation of minerals by excavation units, formation of roof exposures and partial laying of the developed space by the thickness of the deposit, the excavating capacity and sustainable area are determined exposures of the roof, mining by excavation units is carried out in areas of the deposit with a capacity greater than the allowable power from a stable area w expose the roof partially stowing the waste portions is carried out on value determined from the relationship

tz t (1-K) - (1 + B), m,

where te is powerful: the backing array, m;

m - excavated power of the section being worked, m;

К - coefficient depending on the mountainous and geological conditions;

B - coefficient of shrinkage of the filling mass;

and produce overlapping rocks, then work out areas with a capacity less than the allowable capacity, and create free space in the resulting voids.

The method is carried out as follows.

Determine the permit) under the terms of part-time work the first power out

mg m K,

where K is a coefficient depending on the geological and geological activities.

Obtained experimentally, is determined by the thickness of the clay sediments in the overlying strata of rocks or rocks similar to them in physical and mechanical properties, for example, mudstones, K 0.3 0, 7:

m 10 m;

K 0.5 (for the use of the lower horizons of the Urupskoy mine);

mg 10 0.5 5 m.,

First of all, yachizhyut consistently work out areas of the ore body with a power greater than UK. Permissible (more than 5 m),

In order to displace overlying rocks as the roof of the clearing chambers collapses, which can lead to dangerous deformations of the earth's surface, mining of the ore body is carried out by excavation units with a stable area of the exposed roof of the clearing chambers.

After working the camera, it is bookmarked. The power of the erected backfill array should compensate for the difference between the excavation and

permissible under the conditions of underworking by the power misuchet shrinkage of the backfill material.

Since permissible under the conditions of underworking, the power is determined through the excavation as

GPD GP K,

and the shrinkage value of the filling material should be compensated by an equivalent increase in the power of the filling mass, determined from the expression

(m-mK) B,

where B is the coefficient of shrinkage of the filling material,

then the required power of the filling array is determined from the expression

gpz m - m K + (m - m K) B, or after transformations te m - (1-K) - (1 + B), where m 10 m, K 0.5;

B 0.3 (for mining conditions of the lower horizons of the Urupskoye field); TK 6.5 m

After laying the spent chamber, before crushing the stocks of the subsequent excavation unit, the roof rocks of the mortgaged chamber are collapsed. The rocks collapse in order to prevent the sudden uncontrolled self-destruction of large masses of rocks that have been worked out over vast areas, and thereby preserve the safe allowable amount of underworking of the roof when extracting the reserves of each excavation unit. After consistently working out areas with a capacity greater than permissible, with laying out the worked out space and collapsing roof rocks when excavating the reserves of each excavation section, low-power sections are worked out, where extraction capacity is equal to or less than allowable underworking (less than 5 m).

In this case, the laying of the cleaning space and the collapse of the roof rocks are not carried out.

A form is invented and a method for developing mineral deposits, including preparatory and rifled openings, excavation of minerals by excavation units, formation of roof outcrops and partial laying of the developed space by the thickness of the deposit, characterized in

reduce the cost of laying, while maintaining safe conditions of operation of objects on the earth's surface, determine the vybmochnyy permissible under working conditions and stable roof exposed area, mining by excavation units is carried out in areas of the deposit with a capacity greater than the permissible power with a stable surface exposed roofing, the waste areas are carried out by an amount determined from the expression

te t (1 -K) - (1 + V), m ..

where GLZ is the power of the backfill array, m, m is the notch power of the section being worked out, m;

К - coefficient depending on the mountainous and geological conditions of the deposit (0.3 + 0.5):

In - the shrinkage factor of the backfill array,

and collapses overlapping

0 rocks, then work out areas with a capacity less than the permissible power and in the resulting voids make out the free space developed.

Claims (1)

Claim A method of developing mineral deposits, including carrying out preparatory and rifled excavations55, excavation of minerals with extracting units, formation of roof exposures and partial laying of mined-out space by reservoir power, characterized in that, for the purpose of mining, including carrying out preparatory and rifted excavations, excavation mineral resources by extraction units, the formation of roof exposures and a partial laying of the worked-out space according to the thickness of the deposit, determines t, the excavation capacity and the stable area of roof exposure, permissible under the conditions of a side job, are worked out by excavation units in areas of a deposit with a capacity greater than the allowable power, with a stable area of exposure of the roof, a partial laying of the worked-out space of the worked out areas is carried out by a value of 15, determined from the ratio of t ₃ ^and t (1 - K) · (1 + B), m, where t ₃ is the capacity of the filling array, m; t is the extraction capacity of the worked-out section, m; K - coefficient depending on mining conditions lay down? deposits: In - coefficient of shrinkage of the filling array; 25 and make collapses of the overlying rocks, after that they work out sites with a capacity less than the allowable power, and in the voids formed, free space is formed. 30 The method is as follows. · ’ The extraction power that is permissible according to the conditions of a part-time job is determined, m _g = m · K, 35 where K is a coefficient depending on mining conditions. It is obtained experimentally, it is determined by the thickness of clay sediments in the overlying rock or rocks, 40 similar to them physical and mechanical properties, for example, mudstones, K "0.3 0.7: m ^and 10 m; K ~ 0.5 (for mining conditions of the lower 45 horizons of the Urup mine); m _e = 10 * 0.5 = 5 m. First of all, sections of the ore body begin to be worked out sequentially with a capacity greater than the indicated permissible stimulus (more than 5 m). In order to prevent the overlying rocks from shifting due to the collapse of the roof of the treatment chambers, which can lead to dangerous deformations of the earth's surface, mining of the ore body is carried out by excavation units with a stable exposure area of the roof of the treatment chambers. 5 17 reduce the cost of laying while maintaining safe operating conditions for objects on the earth's surface, determine the excavation capacity and stable roof exposure area that are permissible under the conditions of working part-time, excavate mining sites in areas of deposits with a capacity exceeding the allowable power with a stable roof exposure area, partially lay out the worked out space worked out areas are carried out by a value determined from the expression 18 6 t _e = t (1-K) · (1 + V), m, where t ₃ is the capacity of the filling array, m; t - mining capacity of the worked out area, m; K is the coefficient depending on the mining and geological conditions of the deposit (0.3 + 0.5); B is the coefficient of shrinkage of the backfill array, and overlying rocks collapse, after that they work out sites with a capacity less than the allowable power and in the formed voids draw up free space.