SU1402671A1 - Method of excavating pillars - Google Patents

Abstract

The invention relates to mining promet and m. B. used in the re-development of mineral deposits by the underground method. The purpose of the invention is to increase the efficiency of excavation of the pillars by improving the recovery rate of the broken rock mass and the working conditions of the miners. The minerals are excavated by chambers (K) with the sequential formation of columnar pillars (C) 1. The developed space 4 between C 1 is insulated with jumpers 5 and laid with hardening mixtures. Then, in at least three adjacent rows of Ts I, overburden of overburden rocks is formed into at least two odd formed isolated K6. This allows the developed space of even K 7 to be used as a cleaning space for excavating Ts 1 in two adjacent rows . After all C 1 is crushed in adjacent rows from K 7 and shipments of broken rock mass into this K 7 and the open space formed by the breaking of C 1, the overburden rocks forcefully collapse into K 7 and the newly formed developed space. 2 Il. with (L

Description

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The invention relates to the mining industry and can be used in the re-development of mineral deposits by underground mining.

The aim of the invention is to increase the efficiency of excavation of the pillars by improving the recovery rate of the broken rock mass and the working conditions of the miners.

FIG. 1 shows a fragment of the plot plan and a schematic diagram of the excavation of the pillars; in fig. 2 shows section A-A in FIG. I.

The process of removing the pillars is carried out as follows.

Mezhduka.dimensional columnar pillars 1 are formed as a result of mining of the field or its site by a chamber-and-pillar development system. Therefore, almost all prepared-cut workings already exist. The preparatory work for the excavation of the pillars 1 is reduced only to the penetration of the brown and backfill workings in the Lower rocks of the openings 2 of the borehole 3 into the open space 4 between the pillars. The developed space 4 between the pillars is isolated from the rest; it is necessary that the rocks be collapsed into at least two formed chambers, moreover, necessarily odd.

The collapse of the overburden in the chamber 6 is produced by forcibly blowing up charges of 5 explosives located in the fans of wells 8 drilled from drilling and blasting workings 2. Forced collapse makes it possible to control the collapse process. The blasting pattern may be as

10 is shown in the drawing. The drilling and backfill excavations 2 are located in the overlying rocks along the axis of a series of pillars. Of these workings, overburden rocks are filled with fans of vertical wells 8. For circulating rocks, in odd measures, 6 explosive charges are placed only from the bottom of wells in the contours of these chambers, i.e. they produce undercharging. explosives explosive charges in

2Q wells 1-2 extreme fans. At the same time, explosive charges in the above fans explode with a slowdown, starting with the charges closest to the contour of the chamber.

Subsequently, the overburden of the overburden is produced by their section-by-section broken-out space with jumpers 5. Then, 25 in the retarding order, the developed space 4 through the wells-After the collapse of the overburden

3 are laid with hardening mixtures. As a result of the laying of the goaf 4, at least in three rows of pillars, the smaller at least two odd chambers begin to collapse the pillars. In the developed space of an even chamber 7, located between two adjacent rows of pillars.

At least two non-30 drilling equipment are fed into the formations, for example, companion formed insulated chambers 6.

The laying of the excavated space 4 in at least three rows of pillars and the subsequent collapse of overlying rocks into at least two formations 35 load the mountain mass 9, for example, insulated chambers are non-loading-hauling machines. Reached for starting excavation

motor boring carriages. Smoking is performed starting from a pair of pillars closest to the end of the camera. After smoking, the pillars are biased with borehole or blast hole explosives. Repulsed

start work on

pillars. The collapse of overlying rocks into odd chambers makes it possible to use the developed space of the fourth chambers 7 as a cleaning space for excavating pillars in two adjacent rows at once. This achieves the maximum intensity of the clearing recess, which, in turn, ensures good repulsion of the broken rock mass produced in the direction of the opposite end of the gauge. Subsequently, the pillars are beaten off in pairs in a retreating order with a consistent reduction in the delivery distance.

After breaking all the pillars in adjacent rows from even kamer 7 and shipment of broken rock into this chamber and indicators of extraction and working conditions, the working space formed by the workers. brisk pillars, bring down the overlapping delivery (sequence) of delivery. To do this, clean up the plots for laying the well-produced wells in fans 7, not affected

Ranges and rock caving can be explosive work during rock caving.

different. You can, for example, first lay in the odd camera. These sections of the wells develop the space between the pillars 50 in the contours of the even chamber, as well as in all the rows, and then bring down the overburden into all the odd chambers. But in all cases, it is necessary to first lay the developed space not the interline 2 used for laying, charge the explosives and, by blasting these charges, overburden the rocks in the retreating order into the even chamber 7

three rows for education. the newly formed elaborated simple And R.ru Y LDRP s ncin 7ir rrifimPYUNGT RO

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three isolated chambers and subsequent directional collapse into two of the three overlapping formed chambers. For the beginning of the work on the excavation of the pillars, neranstvo.

As a result of the overburden of overburden into even chambers and the newly formed developed space, it is necessary for the rocks to collapse into at least two formed chambers, moreover, necessarily odd.

The collapse of the overburden into the chambers 6 is produced by forcibly detonating charges of explosives placed in the fans of wells 8 drilled from drilling and blasting workings 2. Forced collapse makes it possible to control the collapse process. The blasting pattern may be as

shown in the drawing. The drilling and backfill excavations 2 are located in the overlying rocks along the axis of a series of pillars. Of these workings, overburden rocks are filled with fans of vertical wells 8. For circulating rocks into odd chambers, 6 explosive charges are placed only from the bottom of wells in the contours of these chambers, i.e. they produce undercharging. explosives explosive charges in

wells 1-2 extreme fans. At the same time, explosive charges in the above fans explode with a slowdown, starting with the charges closest to the contour of the chamber.

Subsequently, the overburden of the overburden is carried out by section cutting in the backward order, after the collapse of the overburden by

at least in two odd chambers they start digging the pillars. In the developed space of an even chamber 7, located between two adjacent rows of pillars.

serves drilling equipment, for example, a-

 serves drilling equipment, for example, a-

 Mountain mass 9 is shipped, for example, by loading and hauling machines. Dos-

motor boring carriages. Smoking is performed starting from a pair of pillars closest to the end of the camera. After smoking, the pillars are biased with borehole or blast hole explosives. Repulsed

 Mountain mass 9 is shipped, for example, by loading and hauling machines. Dos-

The broken rock mass is produced in the direction of the opposite end of the gauge. Subsequently, the pillars are beaten off in pairs in a retreating order with a consistent reduction in the delivery distance.

After breaking all the pillars in adjacent rows from even kammer 7 and shipments of broken rock mass into this chamber and out of the odd chambers. These sections of the wells in the contours of the even chamber, as well as

gum 2 used for laying, charge blasts of explosives and blasting these charges bring overburden in the retreating order into an even chamber 7

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wound.

As a result of the collapse of overlying rocks into even chambers and the newly formed developed space, they create a single zone of collapse with previously collapsed areas. This is favorably reflected in the quality and working conditions when digging from the next pillar, their series.

The organization of work for removing pillars from the next series can be next.

Under the conditions when the developed space between the pillars in all the rows is laid and the overburden rocks are collapsed into all the odd chambers, operations are performed to break down the pillars from the even chambers, ship the broken mountain and collapse into these chambers and the resulting developed space is consistent from chamber to the camera.

Under the conditions when the developed space between the pillars is laid in three rows and the overburden collapses into two educated isolated odd chambers, work is done on breaking down the pillars and shipment of the rock mass from the even formed insulated chamber and in parallel with this lay the developed space between the pillars in successive r dah. Then the rocks are pulled into the specified even chamber and the next odd one and they start the work on excavation of the pillars from the next even chamber.

Specific organization of work on the excavation of the pillars of the proposed method is chosen depending on the specific technological capabilities and mining and technical conditions.

Claims (1)

Invention Formula The method of excavation of the pillars, including the excavation of minerals by chambers with sequential formation of columnar pillars, laying the worked-out space between the pillars, breaking down the pillars, shipping broken rock, and collapsing overlying rocks, in order to improve the efficiency of excavating pillars by improving extracting the broken rock mass and the working conditions of miners, after laying the mined space between the pillars in at least three adjacent rows with the formation of isolated overlying rocks forcibly collapsing at least two odd formed isolated chamber, and after breaking the pillars in adjacent rows of isolated chambers formed by the even and shipment of broken rock mass overlying rocks forcibly collapsing even formed in isolated chambers and the newly formed goaf. -J  / A a