KR101518471B1 - Mining method for stratigraphic ore in soft rock - Google Patents

Abstract

The present invention relates to a mining method to exploit underground mineral resources, where an ore body to be mined containing concentrated target mineral ingredients is in an uncompacted or in a clastic state, and is present in a stratigraphically horizontal or inclined form in a soft rock. The mining method comprises: (a) a step of digging a skeletal mine of a certain shape and size in a bedrock stratum located under a mineral layer containing the ore body, and has a certain degree of compactness or higher to be safe; (b) a step of digging a main cross mine in a low slope from the skeletal mine in a direction of the inclination angle of the ore body; (c) a step of digging a drift mine from the main cross mine towards a varve among the veins of ore in four mining blocks divided from the ore body; (d) a step of digging a plurality of production cross mines from the drift mine in the direction of the inclination angles between the veins of ore for mining in the four mining blocks; (e) a step of dividing the veins of ore on the left and right of the production cross mines into unit mining areas in equal size, mining the ore starting from a blind end moving towards the drift mine, and ending at the main cross mine; and (f) a step of transporting the mined ore to the ground through the skeletal mine using a transporting means.

Description

METHOD FOR STRATIGRAPHIC ORE IN SOFT ROCK METHOD FOR MINING METHOD FOR STRATIGRAPHIC ORE IN SOFT ROCK

The present invention relates to a method for mining multiple ore and mined ore minerals present in horizontal or mild grains in a non-cemented or crushed strata, and more particularly, Which is located in a soft rock layer and which remains in the mining area of the soft rock layer, is moved from a stable layer having a high degree of certainty above a certain level to a mining target object, And to a mining method of ores that are present in the form of a layer book.

In general, mining refers in its broadest sense to the whole work of mining beneficial minerals present in the earth's crust. It is the mine to collect the useful minerals collected in the area limited to the form of the deposit, and to collect minerals economically, technically, stably, and reasonably in a manner suited to the form of each deposit. .

The radial mining method in the mining method according to the prior art excavates horizontal gangs, shafts or shafts having a wide diameter as far as possible from a selected point on the earth's surface to the vicinity of the selected mineral layer, forming a work area at the bottom thereof, Means for injecting air into the mine and discharging contaminated air from the mineral layer through the at least one ventilator to above the surface of the ground and using a tilt support device capable of being moved in a conventional manner to any selected distance in a selected direction from the work site Mining the first radial shafts in the mineral layer and causing the support to be positioned at every successive radial excavation distance from the work chamber so that their moving portions are directed at a right angle towards the initial wall of the first radial shafts, The enclosure wall of the flexible barrier below the top support Clean air is transported below the first shaft and flows out between the working wall and the closing wall to force the end of the closing wall back to the ground surface through the second shaft, Continuing advancing by continuing to advance at least a portion of the first wall while widening the radial shafts, the first radial shafts are mined to a selected distance and then continuously mined by the selected mining method to form the second wall, It is characterized by the fact that it can be transported to the work room and the ground along the line of the support device.

Background Art [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 10-1978-0000310 (published on Feb. 06, 1978, entitled "Radial mining method").

In general, the radial mining method is to mining a tunnel directly to a mineral layer, so that when a mineral layer is formed in an unconsolidated or crushed state stratum, there is a danger that the tunnel undergoing mining may collapse, And it is difficult to reduce the time and cost required for installation of facilities for preventing the collapse of the tunnel.

Therefore, there is a need for improvement.

The present invention relates to a method for producing a non-cemented or crushed mine (hereinafter referred to as " mine ") in a stable rock layer having a high degree of solidification above a certain level It is an object of the present invention to provide a method of mining minerals present in a bedrock in an economical, safe and efficient manner to a vulnerable rock bed which approaches a target minerals and minutely targets minerals classified to a certain standard.

The present invention relates to a mining method for developing an underground mineral resource existing in a soft rock layer such that a mining object to be mined is an unconditioned or clinker-like state in which an effective mineral component is concentrated, Excavating a skeletal tunnel having a certain shape and size in a rock layer which is located at a lower portion of the mineral layer and which has stability higher than a predetermined value to maintain stability; (b) excavating the main cross tunnel of the mild slope from the skeletal tunnel in an oblique direction of the object body to be exposed; (c) dividing the object-to-be-mined object into four quad-mining blocks from the main cross tunnel to excavate the multi-layered tunnel in the direction of the middle layer; And (d) excavating a plurality of production cross tunnels for mining in each of the quadrants partitioned from the quaternary tunnel in the slope direction of the core; (e) mining the ore so as to finish the mining in the main crossing tunnel while dividing the unit mining area into the standard mining area of the production cross gutter to a predetermined size and retracting from the final screening area to the multi-layered mining area; And (f) moving the ore mined by the mining operation to the ground by using the conveying means through the skeleton tunnel.

In addition, in the step (a) of the present invention, the skeletal tunnel is arched or rectangular, and the ore transporting vehicle is excavated to a size that allows passage of the ore, and the inclination of the tunnel bottom surface is adjusted to 1 degree And is excavated at an inclination of 2 degrees.

The main cross tunnel in the step (b) of the present invention can be formed by a plurality of tunnels according to an existing portion of the object to be mined, and has a space portion having a radius capable of rotating a work vehicle or equipment And excavation.

Further, in the step (c) of the present invention, at the bifurcation point of the multi-layered tunnel that branches off from the main cross tunnel, a space portion having a radius capable of rotating the work equipment is formed.

In each of the tunnels of the present invention, any one support selected from among steel, wood, rock bolt, or shock support means corresponding to the surrounding rock quality, semi-pressure, etc., The inverter is installed at the bottom of the support, and the inverters corresponding to the inverter are installed on the bottom of the support.

In addition, in the above-described stratum corneum and the produced cross gangway of the present invention, in principle, it is collected so that the ore of the tunnel after the ore mining is naturally collapsed.

Also, in the step (e) of the present invention, the work site is provided with a fore-poling or a mini-pipe roof to prevent collapse until the completion of the mining operation.

The skeletal tunnel of the present invention is further characterized in that at least one ventilation tunnel penetrating the ground is further provided for ventilation in the tunnel.

Further, the skeletal tunnel of the present invention is characterized in that a plurality of water storage tanks in which mine underground water is gathered and stored are provided.

In addition, in the present invention, where the multi-level tunnel is connected to the production cross tunnel, the vein of an appropriate scale is feasted for the stabilization of the multi-level tunnel in the core until the entire zone minerals are mined.

In addition, the minimum unit lighting zone in the step (e) of the present invention is characterized by dividing it into an appropriate scale for completing mining within one shift working time.

The apparatus for transporting ores according to the present invention is characterized in that it moves through the skeletal tunnel, the main cross tunnel, the stratified tunnel and the produced cross tunnel to a work site where mining is performed.

Further, in the skeleton tunnel or the main cross tunnel of the present invention, a drilling operation is performed by driving an excavating equipment having a crushing portion in which a plurality of projecting portions are successively arranged in a screw shape, (10) is pushed by an excavating equipment in which a hydraulic vibration ripper or a conical type grounding machine is installed, and the step (e) is performed by mining the object to be mined by the excavating equipment in which the hydraulic vibration ripper or the conical grounding machine is installed, Wherein the transporting vehicle comprises: a driving unit for supplying power; a driving unit for driving the driving unit, the driving unit being rotatably connected to the driving unit by a hinge unit, And a housing portion for housing the housing.

The ore and the re-mining method that are present in the soft rock layer according to the present invention include a method of excavating a skeleton tunnel to a stratum which is located below a mineral layer having a mining object to be mined, It is possible to prevent the safety accident that the tunnel is collapsed during the mining operation by drilling the main cross tunnel to the mining layer through the production cross tunnel and the multi-layer tunnel to prevent the collapse of the tunnel. There is an advantage that the time and cost required to install a separate support facility can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart showing a mining method of ores present in layers in a soft rock layer (hereinafter referred to as a submerged zone) according to an embodiment of the present invention. FIG.
FIG. 2 is a block diagram showing a tunnel structure for implementing a mining method of ores existing in a layered structure on a soft rock layer according to an embodiment of the present invention.
FIG. 3 is a view showing a tunnel of a mining method of ores existing in a layered form on a soft rock layer according to an embodiment of the present invention.
FIG. 4 is a view showing a connection structure between a soft tunnel and a produced cross tunnel of a mining method of ores present in a soft rock layer according to an embodiment of the present invention.
FIG. 5 is a view showing a connection structure of a main cross tunnel and a masonry tunnel of a mining method of ores present in a layered structure on a soft rock layer according to an embodiment of the present invention.
FIG. 6 is a block diagram showing a support of a mining method of ores in a layered form on a soft rock layer according to an embodiment of the present invention.
FIG. 7 is a block diagram showing a support of a skeletal tunnel of a mining method for ores present in a layered structure on a soft rock layer according to an embodiment of the present invention.
FIG. 8 is a view showing a tunnel structure formed by a mining method of an ore existing as a layer book on a soft rock layer according to an embodiment of the present invention.
FIG. 9 is a view showing a transportation vehicle used in a mining method of ores existing in layers on a soft rock layer according to an embodiment of the present invention.
FIG. 10 is a view showing mining equipment and mining equipment of a mining method of ores existing in a layered form on a soft rock layer according to an embodiment of the present invention.
FIG. 11 is a view showing a mining block of a mining method of an ore existing as a layer book on a soft rock layer according to an embodiment of the present invention. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a method for ore and re-mining of a soft rock layer according to the present invention will be described with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator.

Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a flow chart illustrating a method of mining ore in a layered form on a soft rock layer according to an embodiment of the present invention. FIG. 2 is a flow chart illustrating a method of mining ore in a soft rock layer according to an embodiment of the present invention. FIG. 3 is a view showing a tunnel of a mining method of ores existing in a layered structure on a soft rock layer according to an embodiment of the present invention. FIG.

FIG. 4 is a schematic view showing a connection structure between a soft tunnel and a produced cross tunnel of a mining method of ores present in a soft rock layer according to an embodiment of the present invention, and FIG. 5 is a cross- FIG. 6 is a schematic view showing a connection structure of a main cross tunnel and a multi-layer tunnel in a mining method of an ore existing in a layered form on a soft rock layer according to an example, and FIG. 6 is a cross-sectional view of a soft rock layer according to an embodiment of the present invention. Fig. 2 is a schematic view showing the support of the mining method of the ore.

FIG. 7 is a schematic view showing a supporting member of a skeletal tunnel of a mining method of ores existing in a layered structure on a soft rock layer according to an embodiment of the present invention, and FIG. 8 is a cross- FIG. 9 is a view showing a tunnel structure formed by a mining method of ores existing in the form of a layer book on a soft rock layer according to an embodiment of the present invention. Fig.

10 is a view showing a mining equipment and a mining equipment of a mining method of ores existing in a layered form on a soft rock layer according to an embodiment of the present invention, and FIG. 11 is a cross- Fig. 2 is a view showing a mining block of a method of mining ore that is present in the form of a layer book.

Referring to FIGS. 1 to 11, the ore and re-mining method in the form of a layer on the soft rock layer according to an embodiment of the present invention is characterized in that the mining object to be mined, in which the effective mineral component is concentrated, In a mining method that develops horizontal or inclined underground mineral resources as a book, it has a certain shape and size in a rock layer which is located at the lower part of the mineral layer including the mining object and maintains stability with a high degree of certainty Excavating the skeleton tunnels (10), excavating the main cross tunnel (30) of mild slope from the skeletal tunnel (10) in an oblique direction of the object to be mined, A step of excavating the multi-layered tunnel 50 in the direction of the middle layer into a plurality of subdivided mining blocks; Drilling the tunnel 70 in a slanting direction in the core; dividing the unit light mining areas of the left and right veins of the production cross tunnel 70 into a predetermined size and retracting from the final screening site to the middle tunnel 50, Mining the ore so that the mining is finished, and moving the ore mined by the mining operation to the ground by using the conveying means through the skeletal tunnel 10.

If the degree of high integrity of the mineral layer containing the minerals subject to mining is lower than a certain value, if the mining operation is performed by the existing mining method in which minerals are directly excavated to form a tunnel, minerals may collapse The present embodiment initiates the mining operation by excavating the skeletal tunnel 10 to a stratum having a high degree of stability higher than a predetermined value and maintaining stability under the mineral layer.

The skeletal tunnel 10 in the step S10 of excavating the skeletal tunnel 10 is arched or rectangular and is excavated to the extent that the ore-carrying vehicle can pass, and the slope of the tunnel bottom surface is drilled 1 Or two degrees of inclination.

The skeletal tunnel 10 is excavated along a stable stratum by excavating the tunnel to a gentle slope from the ground to the most stable strata located below the mineral layer.

Here, the vent hole portion and the drain hole portion are formed by a communication hole portion 84 that is formed between the tunnel and the ground, and a blower or a water pump is installed to perform forced ventilation and forced drainage.

The skeletal tunnel 10 is installed in an uninhabited state or with a minimum support member 80 and is installed in the skeletal tunnel 10 until the completion of the mining operation by placing a shocking or sealing operation restricted to a vulnerable part, (10).

The main cross tunnel 30 in the stage of excavating the main cross tunnel 30 can be formed by a plurality of tunnels in accordance with the existing portion of the mining object body. Excavate to have a part.

In addition, a space having a radius capable of rotating the work equipment is formed at a branch point of the multi-layer tunnel 50 branching from the main cross tunnel 30.

Therefore, when the work equipment enters the tunnel for mining or after the mining, the ore is received and moved outside the tunnel, the connection between the tunnel and the tunnel can be prevented from interfering with the work equipment.

The step (S30) of excavating the main cross tunnel 30 is performed by setting a site where a mining object body is provided in the mineral layer as a plurality of object blocks to be mined, And a plurality of support members 80 may be provided on the inner wall of the main cross tunnel 30, if necessary.

The block to be mined is constructed with an advanced perforation of approximately 8 degrees at an interval of about 50 m in the skeletal tunnel (10) to confirm continuity and lightness in the direction of inclination and inclination of the object to be mined. Based on this result, The range of the block is determined.

The size of the block to be mined is at most about 120 x 100 m because the mining operation within each mining object block should be determined so as to be completed within about 30 days.

The main cross tunnel 30 of the present embodiment is excavated so as to maintain an upward inclination within about 8 degrees from the skeleton tunnel 10 and excavation of the main cross tunnel 30 is performed by a relatively small excavation equipment.

Here, the excavation direction of the skeleton tunnel 10 is maintained except for the case where the excavation direction of the skeleton tunnel 10 is inevitable, and when the excavation direction is inevitable to change, the excavation direction is necessarily applied by the advanced boring construction result, and the turning radius is relatively large .

As the excavation equipment of the skeleton tunnel 10, it is preferable to use excavation equipment suited to the tunnel standard, and it is preferable to use the excavation equipment which improves the wear damage of the gathering machine, which is the loading part of the wave rock.

The excavation method of the skeletal tunnel 10 and the main cross tunnel 30 of this embodiment is excavated by a free cross-sectional mechanical excavation method, in which an excavated cross-sectional shape from an at least 3.8 × 2.8 m to a maximum 4.5 × 3.0 m is designed in an arcuate shape or a rectangular shape And when it is seated on a vulnerable rock, it supports the excavation front surface stabilization assistant corporation Forepoling or Mini Pipe, and performs the excavation work using the excavation equipment which can freely excavate the excavation section.

The skeletal tunnel 10 is excavated so that the height difference between the skeletal tunnel 10 and the mineral layer is maintained to be at least about 8 m or more. The inclination angle of the skeletal tunnel 10 is pushed horizontally along the mineral layer as much as possible, The excavation direction of the skeletal tunnel 10 is constructed such that it is excavated in the direction of inclination of the mineral layer and penetrates to the ground for establishing a ventilation system.

In addition, the skeletal tunnel 10 maintains an interval of 100 m and simultaneously excavates three or more skeletal tunnels 10 to reduce the time required for skeletal tunnel 10 excavation.

The size of the main cross tunnel 30 is excavated from a minimum of 3.8 x 2.8 m to a maximum of 4.5 x 3.0 m as in the skeletal tunnel 10, and the inclination angle is excluded so as to be within a maximum of 8 degrees.

The shape of the main cross tunnel 30 is arch-shaped so as to effectively cope with the stress concentration. The support member 80 in the required section may be provided with a steel support as much as possible, and a rivet may be installed to prevent the reinforcement.

There is a connection tunnel of the same size between the skeletal tunnel (10) and the skeletal tunnel (10). The distance between the connection tunnel and the skeleton tunnel is about 300m. The advanced hole for the direction of the excavation leads to the geological structure such as fault and discontinuity, Determine the excavation direction by checking the rock condition.

It is preferable that the mining target block is within a maximum size of about 120 x 100 m so that the mining operation in one mining object block can be completed within about 30 days and the length of one skeleton tunnel 10 is designed to be about 1 km .

A step S50 of excavating the masonry tunnel 50 is performed by excavating an arcuate tunnel to form a masonry tunnel 50. A plurality of mover members 80 are installed on the inner wall of the masonry tunnel 50, 80) is provided with a finishing panel (82).

The masonry tunnel 50 is excavated to the left and right from the end of the main cross tunnel 30 and the drilling standard is determined to be about 3.8 x 2.8 m and is pushed horizontally in the direction of the right and left soft layers and pivoted to about 57 m in length , A support member (80) and a finishing panel (82) for supporting the required section are provided.

The step (S40) of excavating the production cross tunnel 70 is performed by excavating an arcuate tunnel in the vertical or inclined direction from the stratum tunnels 50 to form the production cross tunnel 70, A plurality of support members (80) are provided, and a finishing panel (82) is provided on the top of the support member (80).

The production cross tunnel 70 is excavated in the incline direction in the direction of the incline 20m on the gritway 50 in the vein, and the specimen of the tunnel excavation section is determined to be about 3.8 x 2.8 m and excavated.

The length of the production cross tunnel 70 is about 47 m, and the inclination is inclined and pivoted about 3 to 5 degrees along the vein, and the support member 80 and the finishing panel 82 are installed to support the required section.

As described above, any one of the support members selected from among steel, wood, rock bolt, or shock support means corresponding to the surrounding rock quality, semi-pressure, and the like is installed in the tunnel, and any one selected from among wood, steel plate, And the inverter corresponding to the slag is installed at the bottom of the support material.

The production cross tunnel 70 is basically recovered so that the tunnel of the tunnel is naturally collapsed after the ore mining in the stratum grove 50 and the production cross tunnel 70 in the support member, (82) is recovered in principle to induce natural collapse and left in a collapsed state.

In step S50 of mining the mining target mining object, a mining operation is started from the end of the production cross mine 70 by installing a fore-poling or a mini pipe roof to prevent collapse, , The support member 80 or the finishing panel 82 in the area where the mining is completed is demolished and retracted to the side of the masonry tunnel 50 to perform the mining operation.

In this embodiment, the mining operation is performed from the production cross tunnel 70 by performing the mining operation in the mining mode, and the mining target block formed between the production cross tunnel 70 and the production cross tunnel is mined within one working hour of the operator It is determined that the standard to be completed is 15.0 x 13.8 m to 8.0 x 4.0 m.

The mining operation is performed while retreating from the end of the production cross tunnel 70 to the side of the masonry tunnel 50 and finishing the final mining operation in the main cross tunnel 30 located at the center of the unit mining block.

In the mining block workshop, the support material (80) and the finishing panel (82) are collected and recycled at the time of withdrawal in order to secure the safety of the mining work.

The support member 80 is formed by bending an H beam or an I beam into an arcuate shape, and is constructed so as to maintain a plurality of H beams or I beams at a constant interval.

The support member 80 is made of two members such as an H beam, an I beam, or a steel pipe. The support member 80 is disposed so as to maintain a distance of 1.0 m after being transported to the site. The upper joint assembly is fixed with two bolts on both sides, Install Invert for prevention.

In order to maintain the spacing of the support members 80, four trails are provided at appropriate positions of the H beam or the I beam and fixed with a wire usually for fixing the same.

After the support member 80 is installed, the finishing panel 82 may be entirely installed, and a wire mesh may be formed instead of the finishing panel 82.

The finishing panel 82 includes a wood panel or a steel panel in which a plurality of consecutively arranged wood panels or finishing panels 80 are arranged to close the gap between the pair of support members 80. [

A steel material holding method for placing a shock slit on the inner wall of a tunnel may be applied in addition to the steel material holding method using the sprinkler member 80 and the finishing panel 82 as described above. And the detailed description thereof will be omitted.

Also, the skeletal tunnel 10 is provided with one or more ventilating passages penetrating the ground for ventilating in the tunnel, and a plurality of water storage tanks in which mineground groundwater is collected and stored.

Therefore, oxygen supply to the inside of the skeleton tunnel 10 is performed to prevent dyspnea of the operator, and groundwater in the tunnel can be discharged through the water tank.

In addition, where the multi-level tunnel 50 and the production cross tunnel 70 are connected, a pillar of a suitable scale is feasted for stabilization of the multi-layered tunnels 50 until the zone optical body is fully mined.

Therefore, the step of mining the mining object (S50) starts mining work from the production cross mine 70 extending from the end of the masonry tunnel 50, retreats toward the main cross mine 30, A pillar is provided at a connection portion between the masonry tunnel 50 and the production cross tunnel 70 and mining is performed while recovering the support member 80 from the production cross tunnel 70 where the mining operation is completed.

The step S50 of mining the mining object includes the steps of grasping the possible support member 80 among the support members 80 provided on the main cross tunnel 30 when the mining operation is finished and retreated along the main cross mine 30, Thereby guiding the top of the main cross tunnel 30 to collapse.

In addition, the step of mining the mining object (S50) is performed such that the minimum unit mining area is divided into a proper scale for completion of mining within one shift working time, So that it can escape from the tunnel 70.

The ore transporting equipment moves through the skeletal tunnel 10, the main cross tunnel 30, the quaternary tunnel 50 and the production cross tunnel 70 to the worksite where the mining takes place, and after the mining is completed, And moves to the outside of the tunnel in the reverse order.

The skeletal tunnel 10 or the main cross tunnel 30 is excavated by driving the excavation equipment 120 having the crushing portion 122 in which a plurality of projections 124 are continuously arranged in a screw shape The sidewall tunnel 50 or the production cross tunnel 70 is pushed by the hydraulic vibration ripper 132 or the excavator 130 provided with the conical type grounding machine and the step S50 of mining the mining object is performed by the hydraulic pressure The excavating device 130 is provided with a vibration ripper 132 or a conical type grounding machine and the mining object is mined by the conveying vehicle 110 so that the production cross tunnel 70, the soft tunnel 50, the main cross tunnel 30, And the skeleton tunnel 10 and the conveying vehicle 110 includes a driving part 112 for providing power and a hinge part 114 rotatably connected to the driving part 112 by a hinge part 114, (Not shown).

The excavation equipment 120, the excavating equipment 130 and the transportation vehicle 110 are designed to operate within the effective cross-sectional area of the skeletal tunnel 10, the main cross tunnel 30, the quaternary tunnel 50 and the production cross tunnel 70, It is selected in consideration of maneuverability.

The excavating equipment 120 of the skeletal tunnel 10 and the main cross tunnel 30 uses a load header which is a small excavating equipment and the conveying vehicle 110 is a mine truck having a load of about 20 tons, Use the transport facility and check the ground condition in advance using the advanced drilling rig (140) of the LM30SS.

The excavating equipment 120 of the masonry tunnel 50 and the production cross tunnel 70 use vibration rippers, the loading equipment uses LHD (3.2 m ² ), the conveying vehicle 110 uses Mine Truck (20 tons) Lt; / RTI >

The conveying vehicle 110 made of Mine Truck is constructed such that the driving section 112 and the receiving section 116 are rotatably connected by the hinge section 114 so that the production cross tunnel 70, the soft tunnel 50, 30 and the skeletal tunnel 10 from interfering with the inner wall of the tunnel and the transportation vehicle 110 when passing through the curved portion of the skeletal tunnel 10.

As a result, it is possible to provide a method of mining ore ores that are present in a layered form on a soft rock layer which is located below the crushed or ground state layer where the object to be mined is present and which has a high degree of solidity, Method.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

In addition, although the method of mining the ore existing in a layered form on the soft rock layer has been described as an example, this is merely an illustrative example, and the method of mining the minerals existing in the strata other than the mining method of the ore, The mining method of the present invention can be used.

Accordingly, the true scope of the present invention should be determined by the following claims.

10: Skeleton Tunnel 30: Main Cross Tunnel
50: Yeongcheon tunnel 70: Production cross tunnel
80: Support member 82: Finishing panel
84: communicating hole portion

Claims (13)

A mining method for developing an underground mineral resource present in a soft rock layer in a state in which a mining object to be mined with an effective mineral component is unconsolidated or clinker and is horizontally or inclined with a layer book,
(a) excavating a skeleton tunnel having a certain shape and size in a rock layer which is positioned below a mineral layer including a mining object and which has high degree of solidification with a certain degree or more and maintains stability;
(b) excavating the main cross tunnel of the mild slope from the skeletal tunnel in an oblique direction of the object body to be exposed;
(c) dividing the object-to-be-mined object into four quad-mining blocks from the main cross tunnel to excavate the multi-layered tunnel in the direction of the middle layer; And
(d) excavating a plurality of production cross tunnels for mining in the slanting direction in the respective subdivisions of the quaternary tunnel;
(e) mining the ore so as to finish the mining in the main crossing tunnel while dividing the unit mining area into the standard mining area of the production cross gutter to a predetermined size and retracting from the final screening area to the multi-layered mining area; And
(f) moving the ore mined by the mining operation to the ground via the skeletal tunnel by using a conveying means. The method according to claim 1,
In the step (a), the skeletal tunnel is excavated at a slope of 1 to 2 degrees such that the skeleton tunnel is arched or rectangular, and the slope of the tunnel bottom is excavated by natural drainage, Wherein the ore is present in the form of a layer on a soft rock layer.
The method according to claim 1,
The main cross tunnel of the step (b) may be formed by a plurality of tunnels according to an existing portion of the object to be lighted, and excavated to have a space for a work vehicle or a radius capable of rotating equipment. A method of mining ores present in layers on a soft rock layer.
The method according to claim 1,
The method for mining ore as claimed in claim 1, wherein a space having a radius capable of rotating the working equipment is formed at a branch point of the multi-layered tunnel which branches off from the main cross tunnel in the step (c).
The method according to claim 1,
Each of the tunnels is provided with one support selected from among steel, wood, rock bolt, or shock support corresponding to the surrounding rock quality, semi-pressure, etc., and any one selected from among wood, steel plate, and wire mesh , And an inverter corresponding to the slag is installed at the bottom of the support material. The method for mining ores of ores present in a layered form on a soft rock layer.
6. The method of claim 5,
The method of mining ore as claimed in claim 1 or 2, wherein, in the manganese gangue and the production cross gangue, the manganese is recovered after mining of the ore in principle.
The method according to claim 1,
The method of claim 1, wherein in the step (e), a fore-polling or a mini-pipe roof is installed to prevent collapse of the work site until the finishing work is completed.
The method according to claim 1,
Wherein the skeletal tunnel further comprises at least one ventilating tunnel penetrating the ground for venting in the tunnel.
The method according to claim 1,
Wherein the skeletal tunnel is provided with a plurality of water storage tanks for collecting and storing mine underground water.
8. The method of claim 7,
Characterized in that, at a place where the above-mentioned multi-layered tunnels are connected to the above-mentioned production cross-tunnels, a suitable vein is floated on the pillars in order to stabilize the above-mentioned multi- The mining method of the ore.
The method according to claim 1,
The method for mining ore as claimed in claim 1, wherein in the step (e), the mining operation is divided into an appropriate scale so that mining can be completed within a unit working hour.
The method according to claim 1,
Wherein the equipment for conveying the ore moves through the skeletal tunnel, the main cross tunnel, the quarry tunnel and the production cross tunnel to a work site where mining is performed.
The method according to claim 1,
Wherein the skeleton tunnel or the main cross tunnel is pivoted by driving a drilling rig having a crushing portion in which a plurality of projections are continuously arranged in a screw shape,
The masonry tunnel or the production cross tunnel is pivoted by a digging equipment provided with a hydraulic vibration ripper or a conical grounding machine,
Wherein the step (e) comprises the steps of: mining the object to be mined by the excavator provided with the hydraulic vibration ripper or the conical type grounding machine, and moving the excavated object by the conveying vehicle along the production cross tunnel, Lt; / RTI >
Wherein the conveying vehicle includes a driving unit that provides power and a receiving unit that is rotatably connected to the driving unit by a hinge and accommodates a mining object to be mined. .

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