RU2421616C1 - Method of development of thick sloping potassium bed with rock salt interbed - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: method includes cutting bed development by chambers by rising sequential cuts by layers and transportation of mineral resource by vehicle. Bed development in chamber is performed by layers along the whole bed thickness, at ascending sequence by short cuts beginning from the bottom layer. Layer cuts are performed at maximum value according to cutting machine executing mechanism. At performing the cuts of rock salt interbed broken-up salt is located after the cutting machine on the chamber ground in a form of a layer, the maximum thickness of which is calculated from expression. Rock salt broken at chamber beginning is located in earlier developed chamber at a distance equal to cutting machine length. Rock salt, located after the cutting machine on developed chamber ground, is smoothed and tramped down with the aid of vehicle. Layer cuts are performed by reciprocating movements of the cutting machine.

EFFECT: invention allows increasing of selective method cost effectiveness, workers labour capacity and decreasing of power consumption connected with rock salt transportation.

4 cl, 3 dwg

Description

The present invention relates to the mining industry and can be used in the development of powerful shallow potash seams with a layer of rock salt.

A known method for the development of powerful gentle shallow potash seams (US Pat. No. 2310074, Russian Federation, IPC E21C 41/20, No. 2006109947/03, announced March 28, 2006, published November 10, 2007), including working out the chambers with a selective harvester from the arrival on the entire length of the chamber in layers from top to bottom with the transportation of broken rock salt to previously used chambers as filling material.

The disadvantage of this method is the need to transport the broken rock salt to previously worked out chambers and the inability to use this method on formations with a small thickness of the upper layer less than the height of the extraction equipment.

Closest to the proposed technical solution is a method for the development of powerful shallow potash formations (US Pat. No. 2272137, Russian Federation, IPC E21C 41/20, No. 2004133636/03, announced. 17.11.2004, publ. 20.03.2006). The method includes working off the chambers with a combine harvester of selective action with sunset equal to filling the vehicle with broken rock salt or potassium ore along the most powerful layer. The breakdown of the next entry begins with the lower layer of the reservoir. Moreover, all broken rock salt is transported to a neighboring waste chamber.

The disadvantages of this method are the need to transport all the broken rock salt into the adjacent chamber and the limited amount of entry in the volume of the broken ore or rock salt, equal to the capacity of the vehicle in the most powerful layer, which reduces production efficiency.

The technical result of the invention is to increase the efficiency of the selective method for developing powerful flat formations containing intercalated rock salt.

The specified technical result is achieved by the fact that in the method of developing a powerful flat potash formation with a layer of rock salt, including a combine working out the formation by cameras with ascending successive approaches through the layers, transporting minerals by a self-propelled vehicle, working out the formation in the chamber is carried out in layers at once for the entire capacity of the formation, in in ascending order by short vertical entries, starting from the lower layer, while entries in the layers are performed at the maximum value according to the executive shearer body, and when the stope of interlayer salt beaten off rock salt is placed behind the combine to the soil chamber in the form of a layer, the maximum thickness of which is determined by the formula:

h _sl = H _to -h _min ,

where N _to - the height of the camera in the penetration;

h _min - the minimum height of the chamber to accommodate mining equipment.

Rock salt, beaten off at a distance from the beginning of the chamber, equal to the length of the combine, is placed in the previously spent chamber.

The broken rock salt, placed after the combine on the soil of the mined chamber, is leveled and compacted using a self-propelled vehicle.

Approaches in the layers are performed by the reciprocating motion of the combine.

The invention is illustrated by drawings, where figure 1 presents the technological scheme of the excavation of the lower potassium layer of the reservoir; figure 2 is the same when excavating a layer of rock salt; figure 3 - the same when excavating the upper layer of the reservoir.

In the drawings indicated:

1 - upper potash layer; 2 - intercalated rock salt; 3 - lower potassium layer; 4 - mining combine; 5 - vehicle; 6 - practiced camera; 7 - a layer of broken rock salt; 8 - mounted device on a vehicle for leveling the broken layer of rock salt;

l _s - the length of the sunset.

The method is as follows.

The development of the formation in the chamber is carried out immediately for the entire thickness of the formation, in ascending order by short runs, starting from the lower layer of the formation 3 by a maximum value l _s along the executive body of the combine. The chamber 7 is tested using a selective-action combine with a drum-type executive body 4 (for example, a Ural-400 combine). The extraction of the reservoir in the chamber is carried out in ascending order by short runs, starting from the lower layer of the reservoir 3 by the maximum value along the executive body of the combine.

The broken ore by means of a self-propelled vehicle 5 is delivered to general vehicles (for example, conveyor lines) for the subsequent lifting of ore to the surface.

Then make an entry on a layer of rock salt l _s also at the maximum value on the executive body of the combine, taking into account the possible movement of the combine. In this case, broken rock salt is placed behind the combine on the soil of the chamber in the form of a layer, the maximum thickness of which is determined by the formula

h _sl = H _to -h _min ,

where N _to - the height of the camera in the penetration;

h _min - the minimum height of the chamber to accommodate mining equipment.

For h _sl > H _to -h _{min, the} combine complex will not fit into the free space at the site of placement of broken rock salt in height. Therefore, part of the broken rock salt in excess of the indicated volume (taking into account the coefficient of loosening) is subject to storage in a previously worked out chamber.

The broken rock salt, which is placed on the soil of the chamber when working out the layer, is leveled using an attachment 8 and rammed with a self-propelled vehicle immediately after the operation of the combine, and rock salt, broken off at a distance from the beginning of the chamber, equal to the length of the combine, is placed in the spent a chamber to prevent filling of the excavation drift with rock salt repelled by the combine, i.e. normal operation of the excavating drift is ensured.

Further, for breaking rock salt interlayer is carried stope 2 l _of the upper layer 1 as potash to the maximum value on the actuator body with the harvester combine podviganiya possible for slaughter delivery of broken ore before obscherudnichnyh self-propelled transport means of transport for dispensing it to the surface.

Thus, by sequential excavation with short cuts in each layer, a common, close to vertical, face line is formed, on which the face moves after the end of each work cycle. The specified cycle of mining operations in the chamber is repeated until it is fully worked out.

The approaches to the layers are performed as a result of the reciprocating movements of the combine to exclude the formation of the so-called "Scallops" at the contacts of the layers to ensure the least dilution and loss of ore during excavation.

The proposed invention will improve the productivity of workers and reduce energy costs associated with the transportation of rock salt.

Claims (4)

A method for developing a powerful shallow potash formation with a layer of rock salt, including combining mining of the formation with cameras, ascending successive approaches through the layers, transporting minerals by a self-propelled vehicle, characterized in that the mining of the formation in the chamber is carried out in layers at once at the entire thickness of the formation, in short ascending order calls, starting from the bottom layer, while the calls on the layers are performed at the maximum value on the executive body of the combine, and when making calls on after the combine harvester on the soil of the chamber in the form of a layer, the maximum thickness of which is determined by the formula:
h _sl = H _to -n _min ,
where N _to - the height of the camera in the penetration;
h _min - the minimum height of the chamber to accommodate mining equipment. 2. The method according to claim 1, characterized in that the rock salt, beaten off at a distance from the beginning of the chamber, equal to the length of the combine, is placed in a spent chamber, 3. The method according to claim 1, characterized in that the broken rock salt placed on the soil of the processed chamber is leveled and compacted using a self-propelled vehicle. 4. The method according to claim 1, characterized in that the entry into the layers is performed as a result of reciprocating movements of the harvester.

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