RU2538016C1 - Treatment of potash seams - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: proposed method comprises preparatory jobs, ply-by-ply stoped excavation with setting of barren formation seam on worked oil behind the mole. Working is performed with the help of mole of various operating principles. First, stope is subjected to through ventilation. For this, said stope is subjected to first cut by the mole over its entire length for communication with vent gateway. Separate ply-by-ply excavation of potash seams is made by selective, continuous or cyclic miner is executed. First, bottom productive zone of the bed is excavated and loaded into self-propelled car. Miner returned to initial position, started is excavation of barren formation seam to be left at stope soil. Thereafter, left productive formation seam is excavated and located into self-propelled car to be displaced to mine transportation means.

EFFECT: higher efficiency of ore mining.

2 cl, 3 dwg

Description

The invention relates to the mining industry and allows for the development of potash strata of a mixed composition of substandard power and complex structure with substandard layers of a combine ditch with a chamber development system.

A known method of mining a powerful shallow formation, separated by a rock layer, including combine mining of the formation with cameras by successive visits in layers, transporting minerals by a self-propelled vehicle, with mining the formation in the chamber by a combine with a drum or boom actuator, while initially removing part of the lower layer of the useful layer fossil in contact with the interbed of rock salt for the entire width and length of the chamber or its part, after which the interlay is broken off for the whole length and width of the chamber with the removal of a broken rock salt fulfills chamber and then the full width and length of the breaking chamber and shipment of produce at first the upper part of the reservoir and sequentially the finalization of the lower layer, and executed by the power of the first layer must meet a certain condition. The breakdown is carried out in several strokes of the combine, with their subsequent expansion to the design width, while the breakdown of the layer of rock salt, as well as the upper potash layer and the completion of the lower layer, are performed by successive strokes of the combine or the entire length of the chamber, or part of it (RF patent No. 2439322, IPC: E21C 41/20; application No. 201023083/03, declared 08.06.2010, published 10.01.2012).

The disadvantage of this method is a significant increase in the cost of loading and shipping work when shipping an substandard layer of the worked-out formation from the treatment chamber to neighboring waste chambers for use as filling material. In addition, the conditions for normalizing the dust and gas situation during work were not taken into account.

Closest to the proposed one is a method of developing a powerful flat potash formation with a layer of rock salt (RF patent 2421616, IPC E21C 41/20, published on 06/20/2011, Bull. No. 17), which includes mining the formation with selective action cameras with a drum executive body in layers immediately for the whole capacity of the formation, transportation of minerals by a self-propelled vehicle, development of the formation in the chamber is carried out starting from the bottom layer, while the layer-by-layer calls are performed to the maximum value according to the executive body of the comb yna, and when making an entry on a bed of rock salt, broken salt is placed after the combine on the soil of the chamber in the form of a layer of a certain maximum thickness

Layer-by-layer mining of potash seams by selective-action combines with a drum executive, not equipped with a shield for the fencing of the zone of operation of the executive, is accompanied by a significant excess of dust levels when working in a dead end with a chamber development system. Due to this drawback, they are not widely used in the development of potash seams.

The technical result of the invention consists in the possibility of involving in the development of potash formations of mixed composition, substandard in power and complex structure with substandard layers, as well as in normalizing the dusty air environment in the working area of the combine operator.

The specified technical result is achieved by the fact that in the method of working out potash seams with a chamber development system, including preparatory work, a layer-by-layer cleaning recess of the potash stratum in the working chamber, leaving an unproductive layer of the stratum on the soil of the working chamber, the working out of potash strata is carried out using combines of different types of action, at the same time, they provide through ventilation in the treatment chamber, for which purpose the combine in the design circuit of the chamber being worked out m of the drilling type pass a cutting preparatory combine harvester for its entire length and knock down with a ventilation drift, then separately produce productive layers of the potash formation by selective, continuous or cyclic harvesters in layers throughout the length of the treatment chamber, starting from working out the lower productive layer of the formation with its shipment in a self-propelled wagon, and after the combine is driven off, a non-productive layer of the formation is excavated with its placement on the soil of the worked out chamber, after which, in the same way ohm fulfill remaining productive layer formation with shipping it in a shuttle car and transport from the chamber to obscherudnichnyh delivery vehicles.

Dusty air from the working area of the combine operator and the driver of the self-propelled wagon is additionally removed through ventilation by sequentially connecting (building up) the links of the ventilation stand to the working area

The use of combine harvesters of either selective, continuous, or cyclic action in combination with drill type combines allows the development of mixed potash formations of substandard power and complex structure with substandard layers using elements of the technology of gross and layer-by-layer potash formation mining and to increase the productivity of mining operations .

The development of potash seams by selective, continuous or cyclic combines that are not equipped with a shield to protect the working area of the executive body is accompanied by a significant excess of dust levels when working in a dead end with a chamber development system. In this case, it is necessary to normalize the dusty air environment in the working area of the combine operator by removing dust on the ventilation drift from the treatment chamber through the through through preparatory combine harvester and ensuring the ventilation of the chamber due to the mine depression, without additional measures to remove the exhausted air stream from the face.

The essence of the method is illustrated by drawings, where in Fig.1 is a diagram of mining operations in the chamber; in Fig 2 - sinking of a split working out; figure 3 is a section along aa.

The drawings indicate: 1 - mining combine; 2 - treatment chamber; 3 - split production; 4 - stroke passed by the drill type combine; 5 - ventilation drift; 6 - local ventilation fan; 7 - ventilation stand; 8 - links of ventilation pipes; 9 - stored rock salt; 10 - self-propelled wagon; 11 - potash formation; 12 - rock layer of rock salt.

The method is as follows.

The working out of a potash formation of mixed composition or complex structure is carried out simultaneously in two or more chambers by mining combines 1 of different types of action, and treatment and preparatory work is carried out in them sequentially (Fig. 1).

Initially, in the design circuit of the treatment chamber 2, a dead end cut-out 3 is produced by a drill-type combine 4 until it malfunctions with a ventilation drift 5. The dead-end face is ventilated when a cut-through working out is drilled using a local ventilation fan 6 and a ventilation stand 7, which is assembled from the links of the ventilation pipes 8 incremented as the face is moved (Fig. 1). After the failure of the split workings 3 with a ventilation drift 5, through ventilation is carried out. In this case, the ventilation stand remains in the chamber, but the links of the ventilation stand are disconnected.

After driving the cut-through excavation, the drill-type harvester 4 is distilled into the next chamber planned for development for conducting preparatory work with the sinking of the next cut-off course.

Next, do the cleaning work.

The remaining reserves of the chamber are worked out in layers with separate excavation of the productive layers of the potash layer 11 by combines either of selective, continuous or cyclic action, for example, with an arrow-shaped executive body. This makes it possible to increase the level of use of combines due to the lack of overlapping in time of tunneling operations associated with stripping the combine for cutting to the next layer to be worked out, thereby eliminating the cyclical nature of operations and ensuring the accuracy of this technology with an increase in the coefficient of the machine’s working time for mining masses.

Initially, a lower conditioning layer of minerals is beaten down by the combine 1 over the entire length of the chamber with the delivery of ore mined by delivery vehicles, for example, a self-propelled carriage 10, from the mined chamber (Fig. 2).

Then, the rock layer of rock salt 12, which is not removed from the chamber, is also beaten to the entire length of the chamber, but 9 is stored during cleaning work in the chamber’s waste space, for example, by turning the tail of the combine’s discharge conveyor 45 ° to the right (Figs. 1, 3 )

The extracted conditioned ore from the productive layers of the formation is shipped to a self-propelled car, for example, by turning the tail of the unloading conveyor of the combine 45 ° to the left. Then it is taken out of the treatment chamber to means of general transport (Fig. 3).

When conducting cleaning operations with combines with layer-by-layer excavation of the worked-out formation, in addition to through ventilation, dusty air is removed from the working area of the combine operator and the driver of the self-propelled car by connecting (building up) the links of the ventilation stand 7, which was used when driving the cutting excavation 3. This is achieved by mounting the connecting links . The air stream of the local ventilation fan 6 is directed into the area of operation of the combine operator. This technique allows you to effectively ventilate and remove dusty air from the working area of the combine operator and the driver of a self-propelled car.

The use of the proposed invention will allow to involve in the mining potash seams of mixed composition, substandard in capacity and complex structure with substandard layers, which, to increase the ore base of potash enterprises from the category of off-balance reserves, are transferred to the category of balance reserves, as well as to increase the efficiency of ore mining due to the continuity of layer-by-layer mining potash seams using previously unused types of harvesters that are not widely used due to the high cost of sand systems the suppression of dry and wet dust collection, comparable in cost to shearers of this type, as well as the normalization of the dust and gas situation in the working area of combine operators and self-propelled wagons.

Claims (2)

1. A method of working out potash seams with a chamber development system, including carrying out preparatory work, a layer-by-layer cleaning recess of a potash stratum in a working chamber with leaving an unproductive layer of the stratum on the soil of the working chamber behind the combine, characterized in that the working out of potash layers is carried out using different types of combines, in this case, through ventilation of the treatment chamber is initially provided, for which purpose in the design circuit of the processing chamber the drill-type combine harvester they pass the split preparatory harvester course to its entire length and knock it off with a ventilation drift, then separate produce the productive layers of the potash reservoir with selective, continuous or cyclic harvesters in layers throughout the length of the treatment chamber, starting from mining the lower productive layer of the reservoir with its shipment to the self-propelled carriage and after distillation of the harvester, a non-productive layer of the formation is excavated with its placement on the soil of the worked-out chamber, after which they work out in a similar way tavshiysya productive layer formation with shipping it in a shuttle car and transport from the chamber to obscherudnichnyh delivery vehicles. 2. The method according to claim 1, characterized in that the dusty air from the working area of the combine operator and the driver of the self-propelled carriage is removed, in addition to through ventilation, by serial connection - by increasing the links of the ventilation stand to the working area.

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