AU2023258380A1 - Method for mining underground bauxite large inclined angle medium-thick ore bed with dual mining machine - Google Patents
Method for mining underground bauxite large inclined angle medium-thick ore bed with dual mining machine Download PDFInfo
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- 238000005065 mining Methods 0.000 title claims abstract description 275
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 23
- 230000009977 dual effect Effects 0.000 title claims abstract description 14
- 238000005520 cutting process Methods 0.000 claims description 40
- 229910052500 inorganic mineral Inorganic materials 0.000 description 15
- 239000011707 mineral Substances 0.000 description 15
- 239000003245 coal Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
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Abstract
The present invention relates to a method for mining an underground bauxite
large inclined angle medium-thick ore bed with a dual mining machine, which
specifically includes: when a working face is arranged, a high-grade ore bed is
pre-controlled in the middle of an ore bed, an upper part and a lower part of the
high-grade ore bed of a face side are both medium-grade ore beds, a mixed mining
operation is carried out in form of full-seam mining with both the high-grade ore bed
and the medium-grade ore bed as a target, the medium-grade ore beds above and
below are mined to form a roof and a floor respectively, after the roof is formed, the
exposed roof is immediately supported following the mining machine by pulling the
support towards the face side, the two mining machines are simultaneously arranged
on the same working face, and perform snaking from a middle part and a higher end
of the working face respectively, and mine down towards the lower end and the
middle part of the working face respectively at the same time, The two mining
machines mine at the same time. The present invention can significantly improve the
mining efficiency and reduce the mining cost.
16
Description
[0001] The present invention relates to a method for mining a medium-thick bauxite
ore bed, suitable for use in a case where working faces are large inclined angled,
high-grade ore beds are relatively thick and occupy a relatively large proportion of the
entire mining face.
[0002] There are many bauxite and other hard materials in the underground bauxite
to be mined. Due to the high hardness of the materials, large cutting force is required,
and abrasion of the cutting head is also fast, so the cutting is difficult, and the hard
rock blocks formed by cutting are possible to cause obstacles or even blocking to the
travelling system of the mining machine, and have a great impact on a traction system
of the mining machine, so the moving speed of the mining machine is usually much
slower than that of a coal mining machine, and accordingly the yield is much smaller
and the production cost is high.
[0003] An object of the present invention is to provide a method for mining an
underground bauxite large inclined angle medium-thick ore bed with a dual mining
machine with high mining efficiency and good economy.
[0004] The main technical solutions used for the present invention are as follows:
[0005] a method for mining an underground bauxite large inclined angle
medium-thick ore bed with a dual mining machine is provided, where when a working
face is arranged, a high-grade ore bed is pre-controlled in the middle of an ore bed, an
upper part and a lower part of the high-grade ore bed of a face side are both
medium-grade ore beds, a mixed mining operation is carried out in form of full-seam
mining with both the high-grade ore bed and the medium-grade ore bed as a target,
the medium-grade ore beds above and below are mined to form a roof and a floor
respectively, after the roof is formed, the exposed roof is immediately supported
following the mining machine by pulling the support towards the face side, the two mining machines are simultaneously arranged on the same working face, and perform snaking from a middle part and a higher end of the working face respectively, and mine down towards the lower end and the middle part of the working face respectively at the same time.The two mining machines mine at the same time.
[0006] The two mining machines are respectively equipped with a high power
ranging arm, a medium-diameter drum, and twice the diameter of the drum should not
be less than the height of the face side.
[0007] The specification and configuration of the two mining machines are
preferably the same.
[0008] The method for mining an underground bauxite large inclined angle
medium-thick ore bed with a dual mining machine may include the following steps:
[0009] SI: stopping a mining machine C1 between a midpoint D and an the upper
end of a working face, and stopping a mining machine C2 at the upper end, where at
the moment, the position where the two mining machines stop is an initial position;
[0010] S2: pushing the conveyor a web towards the face side by the pushing device,
where a pushing length is a snaking distance from the lower end to the mining
machine C1, and the mining machine C2 stops waiting;
[0011] S3: making the mining machine C1 mine a machine length plus a snaking
distance to the lower end, where at the moment, the mining machine Cl performs a
first snaking on the face side in a cycle; then continuing pushing, by the pushing
device, the conveyor; and making the mining machine C2 continue stopping waiting;
[0012] S4: making the mining machine Cl cut and load ore while mining towards
the lower end, and cut the roof and the floor flat, where the support immediately
support the roof following the mining machine Cl; making the mining machine C2
stop waiting; continuing pushing, by the pushing device, the conveyor, where an end
point of the pushing is at a snaking distance away from the mining machine C2;
[0013] S5: making the mining machine Cl continue mining down while cutting and
loading ore, and cut the roof and the floor flat, where the support immediately support
the roof following the mining machine Cl; and making the mining machine C2 mine
down by a machine length plus a snaking distance, where at the moment, the mining machine C2 performs snaking on the face side;
[0014] S6: making the mining machine Cl continue mining down while cutting and
loading ore, and cut the roof and the floor flat, where the support immediately
support the roof following the mining machine C1; making the mining machine C2
mine down while cutting and loading ore, and cut the roof and the floor flat until the
face side is cut through, where the support immediately support the roof following
the mining machine C2; continuing pushing, by the pushing device, the conveyor to
an end B, and the end B refers to an upper side end of the working face;
[0015] S7: making the mining machine Cl continue mining down to the lower end;
making the mining machine C2 tram up without cutting;
[0016] S8: making the mining machine C1 tram up to cut away a bottom step of the
lower end; making the mining machine C2 continue tramming up, and cut the ore
within a machine length plus a snaking distance from the upper end;
[0017] S9: making the mining machine Cl tram up without cutting; pushing the
conveyor a web from the lower end of the rear of an tramming direction of the mining
machine Cl towards the face side by the pushing device,, where a snaking distance
between the end point of pushing and the mining machine Cl is maintained; and
making the mining machine C2 mine down to cut away the bottom step of the upper
end; and
[0018] SlO: making the mining machine Cl continue travelling up without cutting
and stop till an initial position is reached, and continuing pushing, by the pushing
device, the conveyor, where a snaking distance between the end point of pushing and
the mining machine Cl is maintained; and making the mining machine C2 tram up
and stop till the upper end, i.e., the initial position is reached; and returning to Step S3
for the next cycle.
[0019] In Step S3, where the position where the mining machine Cl performs the
first snaking on the face side in one cycle is preferably close to a working face
midpoint D.
[0020] An upper limit value of the length of the working face is preferably not less
than 100 m.
[0021] Advantageous effects of the present invention are:
[0022] the combined mining with two mining machines on the same working face
can greatly improve the productivity and economic benefits of the single face with the
same support and conveyor.
[0023] Due to an increase of the productivity, a utilization rate of the working face
equipment increases, and the working face are greatly lengthened conditionally, for
example, from an original 100 m to 100 m-1000 m or even longer, which is equivalent
to the length of more than one original working face, so that the number of tunnels
between working faces is significantly reduced, thus greatly saving the engineering
cost caused by the tunneling amount of the tunnels.
[0024] With the method of the present invention, the highest mining efficiency and
the best economy can be obtained by mixed mining of medium-grade and high-grade
mineral aggregates without mining low-grade mineral aggregates in form of full-seam
mining.
[0025] Since the total thickness of medium-grade and high-grade ore beds is large
enough to meet the passing needs of mining machines, it is unnecessary to cut the
low-grade ore beds and rock layers located at the top and bottom, not only the mining
efficiency can be improved and the mining cost can be reduced through full-seam
mining, but also the abrasion of the mining machines caused by cutting the waste
materials with high hardness can be avoided and the working reliability of the mining
machines can be improved. A difference from a thin ore bed is desired to be proposed.
For the mining of very thin ore beds, it is necessary to cut away a part of low-grade
mineral aggregate at the top and bottom after the mineral aggregate has been mined to
ensure that the equipment can have sufficient space to pass through (if small-power
mining equipment is used, the cutting capacity cannot meet the mining, resulting in
the problems of adaptability and reliability). For the sufficiently thick ore bed
highlighted in this case, there is no need to mine low-grade mineral aggregates.
[0026] The two mining machines perform cutting feed at the same time from the
middle and one end of the working face respectively, which can effectively avoid the
mutual influence of safety risk due to the close operation of the equipment compared with the cutting feeds at two sites close to each other.
[0027] Since the main mining operation is performed while mine down along an inclination angle, gravity action can be used to reduce traction consumption and reduce equipment abrasion. BRIEF DESCRIPTION OF THE FIGURES
[0028] FIG.1 is a schematic diagram showing a mineral aggregate mining process according to the present invention;
[0029] FIG. 2 is a side schematic diagram showing working face equipment during mining by two mining machines at the same time;
[0030] FIG 3 is a schematic diagram showing acutting state of a face side (two mining machines are in an initial position before cutting starts);
[0031] FIG 4 is a schematic diagram showing a cutting state of a face side (mining down of the mining machine Cl is finished, and the mining machine C2 is in a process of mining down);
[0032] FIG 5 is a schematic diagram showing a cutting state of a face side (the mining machine C1 mines up without cutting, and the mining machine C2 mines up and cuts the ore within a machine length plus a snaking distance from the upper end); and
[0033] FIG 6 is a schematic diagram showing a cutting state of a face side (the mining machines Cl, C2 tram up and return to their respective initial positions after mining is completed).
[0034] Description of the Reference Numerals:
[0035] Cl. mining machine; C2. mining machine; S. conveyor; K. medium-grade and high-grade mineral aggregates; F. waste material; Lt. machine length; Lx. snaking distance; T. pushing device; Z. support; D. working face midpoint;
[0036] : performing traction to this position; : starting traction from this position; ||: stopping traction; : traction (direction of the arrow indicates the direction of traction); :the mining machine cuts ore back and forth in a local area, leveling the roof and the floor and loading. DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS
[0037] The present invention discloses a method for mining an underground bauxite
large inclined angle medium-thick ore bed with a dual mining machine, which is a
mechanized mining method and is applicable to a working face with a relatively thick
high-grade ore bed. As shown in FIGS. 1 and 2, the main working face equipment to
be used includes a mining machine, a conveyor S, a support Z and a pushing device T.
[0038] The conveyor is a device composed of a plurality of troughs and formed by
connection between two adjacent troughs and paved at the same time from one end to
the other end of the working face (a scraper connected by a chain is respectively
provided in the upper and lower frames in each trough, and the chain is driven by the
power of an end to generally form a circular moving chain, and the material is driven
to be conveyed to the end by the scraper). The support is an independent device
connecting each trough, and there are also a plurality of supports correspondingly.
Although there is no connection between the supports, in order to better prevent
gangue leakage from the roof between the supports, each support is provided with a
retractable guard plate at a joint.
[0039] Thus, a plurality of supports (which together form protection over the whole
working face) and a plurality of conveyor troughs (which continuously convey
material to the end and out by the conveyor on the other end) are applied
simultaneously to the two mining machines to protect them.
[0040] In addition, through the support resistance, the support moves the conveyor
to form an S-bend step by step until the end is pushed straight. When a support or
supports are lowered to a certain height, the support or supports are pulled forward by
means of a piston rod being retracted by the action of an oil cylinder connected to a
conveying trough due to the friction resistance of no supporting force. By this
stepwise push-pull operation, the forward movement of the conveyor (trough) and the
support is achieved.
[0041] Firstly, when a working face is laid, the high-grade ore bed should be
pre-controlled in the middle of an ore bed, and the medium-grade ore beds are above
and below the high-grade ore bed of a face side. Taking both the high-grade ore bed
and the medium-grade ore bed as the target to carry out a mixed mining operation in form of full-seam mining. The upper and lower medium-grade ore beds are mined to form a roof and a floor, respectively. After the roof is formed, the exposed roof is immediately supported following the mining machine by pulling a support Z toward the face side. Since the total thickness of the medium-grade and the high-grade ore beds is large enough to meet the passing needs of mining machines, the low-grade ore beds and rock layers located above the upper medium-grade ore bed and below the lower medium-grade ore bed are not mined, not only the mining efficiency can be improved and the mining cost can be reduced through full-seam mining, but also the abrasion of the mining machines caused by cutting the waste materials with high hardness can be avoided and the working reliability of the mining machines can be improved. Medium-grade and high-grade mineral aggregate K is available mineral aggregate, and low-grade mineral aggregate and rock belong to waste material F. Two mining machines Cl and C2 are simultaneously arranged on the same working face, and perform snaking from a middle part and a higher end of the working face respectively, and mine down towards the lower end and the middle part of the working face respectively at the same time. The two mining machines mine at the same time.
[0042] In combination with the feature that the traction speed of the mining machine is much lower than the speed of the support pulling and the conveyor pushing, the present invention proposes a high-efficiency mining method by which a working face and two mining machines are jointly operated, and by a small cost of adding a mining machine and the corresponding parts and components, the productivity can be nearly twice or higher than the original productivity, thereby significantly improving the economic efficiency.
[0043] Through accounting, under the premise that the mixed mining of medium-grade mineral aggregate with high-grade mineral aggregate does not affect the final mineral aggregate grade, the best economic efficiency and the highest efficiency can be achieved by full-seam mining.
[0044] The two mining machines are respectively equipped with a high power ranging arm, a medium-diameter drum, and twice the diameter of the drum should not be less than the height of the face side.
[0045] The two mining machines are of the same specification and configuration for ease of management.
[0046] The method for mining an underground bauxite large inclined angle medium-thick ore bed with a dual mining machine may include the following steps:
[0047] SI: making the whole working face be a working face with a large inclined angle, and designating two ends of the working face respectively as a lower end and the upper end (in this embodiment, the lower end and the upper end respectively correspond to the left end and the right end of the working face shown in the figure). A mining machine C1 stops between a midpoint D and the upper end of a working face, and a mining machine C2 stops at the upper end, where at the moment, the position where the two mining machines stop is an initial position. At the moment, the distribution of the medium-grade and high-grade ore beds on the face side is as shown in FIG. 3. The mining machine itself occupies a distance Lt in a stopped state, which is referred to as a machine length.
[0048] S2: pushing the conveyor a web towards the face side by the pushing device, where a pushing length is a snaking distance from the lower end to the mining machine Cl (the distance refers to the one along the face side when the mining machine performs snaking, and is denoted as Lx). The pusher conveyor first forms an S-bend in one cycle in preparation for the mining machine Cl to perform a first snaking on the face side in one cycle. The mining machine C2 stops waiting.
[0049] S3: making the mining machine Cl mine a machine length plus a snaking distance to the lower end, where at the moment, the mining machine Cl performs the first snaking on the face side in a cycle and starts the first cutting. Then the pushing device T continues to push the conveyor (the so-called continuous pushing conveyor refers to taking the end point of the previous pushing as the starting point of this pushing, and keeping the same unidirectional pushing sequence from one end of the working face to the other end as the previous pushing to push the conveyor a web towards the face side). The mining machine C2 continues to stop waiting.
[0050] S4: making the mining machine Cl cut and load ore while mining towards
(i.e., mining down) the lower end, cut the roof and the floor flat, where the support immediately support the roof following the mining machine Cl, and the mining machine Cl starts first cut mining in a cycle; making the mining machine C2 stop waiting; continuing pushing, by the pushing device, the conveyor, where an end point of the pushing is at a snaking distance Lx from the mining machine C2;
[0051] S5: making the mining machine C1 continue mining down while cutting and loading ore, and cut the roof and the floor flat, where the support immediately support the roof following the mining machine Cl; and making the mining machine C2 mine down by a machine length plus a snaking distance, where at the moment, the mining machine C2 performs snaking on the face side;
[0052] S6: making the mining machine Cl continue mining down while cutting and loading ore, and cut the roof and the floor flat, where the support immediately support the roof following the mining machine Cl; making the mining machine C2 mine down while cutting and loading ore, and cut the roof and the floor flat until the face side is cut through, where the support immediately support the roof following the mining machine C2; continuing pushing, by the pushing device, the conveyor to an end B, i.e. straightening the subsequent conveyor to eliminate the S-bend. The state of the face side is as shown in FIG. 4. An end B refers to an upper side end of the working face. This is not indicated in the figures.
[0053] Since the mining operation is mainly carried out when the mining machine mine down along an inclination angle, the effect of gravity can be fully utilized and the consumption of traction force can be reduced, thereby reducing the traction system loss of the mining machine.
[0054] S7: making the mining machine C1 continue mining down to the lower end; making the mining machine C2 tram up without cutting;
[0055] S8: making the mining machine C1 tram up to cut away a bottom step of the lower end, where the mining of the mining machine Cl is completed until now; and making the mining machine C2 continue tramming up and cut the ore within a machine length plus a snaking distance from the upper end. The state of the face side is as shown in FIG. 5.
[0056] S9: making the mining machine Cl tram up without cutting; pushing the
conveyor a web from the lower end of the rear of an tramming direction of the mining
machine C1 towards the face side by the pushing device, where a snaking distance
between the end point of pushing and the mining machine Cl is maintained; and
making the mining machine C2 mine down to cut away the bottom step of the upper
end; and
[0057] S10: making the mining machine Cl continue travelling up without cutting
and stop at an initial position, and continuing pushing, by the pushing device, the
conveyor, where a snaking distance between the end point of pushing and the mining
machine C1 is maintained; and making the mining machine C2 tram up and stop till
the upper end, i.e., the initial position is reached. The mining of the face side is now
as shown in FIG. 6. Returning to Step S3 for the next cycle.
[0058] Instructions: "the next cycle" refers to that in the current same working face,
the two mining machines return to the same position (an opposite working face) of the
previous cycle, respectively, since the mineral aggregate of a web is mined, the same
operating step as that in the previous cycle can be performed.
[0059] In Step S3, the position where the mining machine Cl performs the first
snaking on the face side in one cycle is preferably close to a working face midpoint D,
so that the mining length of the two mining machines is as close as possible, ensuring
that the two mining machines are simultaneously mining, and minimizing the
additional waiting time of any one mining machine caused by the
non-synchronization.
[0060] An upper limit value of the length of the face side of the working face is
preferably not less than 100 m, such as 100-1000 m, or even longer, so that the
number of tunnels between the face side can be greatly reduced compared with the
original 100 m, thereby greatly saving the engineering cost corresponding to the
tunneling amount of the tunnels.
[0061] This embodiment is directed to ore mining with higher hardness, such as
bauxite; similar in principle, a method for mining on one working face with two
mining machins can also be used for the coal mining, but since the hardness of the coal bed on the coal mining face is lower, the coal mining machines can be operated at a relatively fast traction speed in combination with a fast pulling frame and pushing and rolling to realize a fast mining (an upward traction speed followed by a pulling speed). Therefore, the coal mining face can realize a high-efficiency mining without using the method for mining on one working face with the two mining machines (on the contrary, on the coal mining face, if one working face with the two mining machines is used, since the coal mining machines need to use the same conveyor to convey and perform cutting feed, and the pulling speed cannot far exceed the traction speed, the whole face mining efficiency will be restricted).
[0062] However, in this case, for the mining of materials with medium and high hardness (such as bauxite), the mining machine generally has lower traction speed and lower mining efficiency, considering that the pulling speed is far from being brought into play, it is possible to use one working face with two mining machines, and use the cutting mode of rapid pulling and low-speed traction of double/multiple equipment to improve the overall mining efficiency of a single working face.
[0063] The "full-seam mining" mentioned in this embodiment refers to the use of double drums (one above and one below: the upper drum mines along the roof while the lower drum mines along the floor) to achieve the full mining over the whole effective height of the working face, i.e., completing full-seam mining through one passage.
[0064] The distribution of underground bauxite is much more complicated than that of coal bed. Although generally similar to a coal bed, there are both thick and thin ore beds. Although there is enough height space in thick ore bed mining, it is theoretically possible to use high-capacity equipment, but due to the large hardness of the ore, if the inclination angle of the working face is large, cutting force and traction needs to be very large, resulting in rather serious cutting and traction slip abrasion, so there is no such equipment. For thick ore beds, it is not expected to be too difficult as long as it is possible to find solutions to improve the performance of the equipment.
[0065] However, the distribution characteristics of bauxite ore bed determine that it is not only hard, but also has the uneven thick and thin distribution, especially in different strike sections of the same working face, or between different working faces, even the thickness varies greatly at different positions on one working face. High-capacity large-scale equipment can be used for mining thick ore beds, but it is difficult to realize the same equipment for mining thick and thin co-mining for thin ore distribution (even without mineral components, only high-hard stones). In this case, a comprehensive mining technology similar to coal mine cannot be used for mining, which is the biggest mining method problem for underground bauxite mining (due to the complexity of geological conditions, some ore sections are not good for achieving comprehensive mining: otherwise, equipment damage and excessive loss of parts and components such as cutting picks are caused, i.e., the production is not economical).
[0066] In this case, for a working face of a bauxite ore bed with a large inclined angle, the sliding wear can be relieved by adopting a one-way mining method for mining down to cut ore and travelling up without cutting according to the characteristics of the angle and utilizing the advantage of the gravity of the mining machine itself (mining down can be performed as long as there is a certain traction force). At the same time, in terms of equipment, the design idea of large-torque and short-heavy mining machine with large space for setting maximum cutting capacity is adopted to improve the adaptability to thin ore bed as much as possible, and the wide mining height capacity is also taken into account in the mining of thick ore bed. Therefore, the problem of complex geological conditions is better solved in an aspect of equipment and mining methods.
Claims (6)
- WHAT IS CLAIMED IS: 1. A method for mining an underground bauxite large inclined angle medium-thick ore bed with a dual mining machine, wherein when a working face is arranged, a high-grade ore bed is pre-controlled in the middle of an ore bed, an upper part and a lower part of the high-grade ore bed of a face side are both medium-grade ore beds, a mixed mining operation is carried out in form of full-seam mining with both the high-grade ore bed and the medium-grade ore bed as a target, the medium-grade ore beds above and below are mined to form a roof and a floor respectively, after the roof is formed, the exposed roof is immediately supported following the mining machine by pulling the support towards the face side, two mining machines are simultaneously arranged on the same working face, and perform snaking from a middle part and a higher end of the working face respectively, mine down towards the lower end and the middle part of the working face respectively at the same time, and the two mining machines mine at the same time.
- 2. The method for mining an underground bauxite large inclined angle medium-thick ore bed with a dual mining machine according to claim 1, wherein the two mining machines are respectively equipped with a high power ranging arm, a medium-diameter drum, and twice the diameter of the drum should not be less than the height of the face side.
- 3. The method for mining an underground bauxite large inclined angle medium-thick ore bed with a dual mining machine according to claim 2, wherein the two mining machines are identical in specification and configuration.
- 4. The method for mining an underground bauxite large inclined angle medium-thick ore bed with a dual mining machine according to claim 1, 2 or 3, comprising the steps of: Si: stopping a mining machine C1 between a midpoint D and an the upper end of a working face, and stopping a mining machine C2 at the upper end, wherein at the moment, the position where the two mining machines stop is an initial position; S2: pushing the conveyor a web towards the face side by the pushing device, wherein a pushing length is a snaking distance from the lower end to the mining machine C1, and the mining machine C2 stops waiting; S3: making the mining machine Cl mine a machine length plus a snaking distance to the lower end, wherein at the moment, the mining machine C1 performs a first snaking on the face side in a cycle; then continuing pushing, by the pushing device, the conveyor; and making the mining machine C2 continue stopping waiting; S4: making the mining machine C1 cut and load ore while mining towards the lower end, and cut the roof and the floor flat, wherein the support immediately support the roof following the mining machine C1; making the mining machine C2 stop waiting; continuing pushing, by the pushing device, the conveyor, wherein an end point of the pushing is at a snaking distance away from the mining machine C2; S5: making the mining machine Cl continue mining down while cutting and loading ore, and cut the roof and the floor flat, wherein the support immediately support the roof following the mining machine Cl; and making the mining machine C2 mine down by a machine length plus a snaking distance, wherein at the moment, the mining machine C2 performs snaking on the face side; S6: making the mining machine Cl continue mining down while cutting and loading ore, and cut the roof and the floor flat, wherein the support immediately support the roof following the mining machine Cl; making the mining machine C2 mine down while cutting and loading ore, and cut the roof and the floor flat until the face side is cut through, wherein the support immediately support the roof following the mining machine C2; continuing pushing, by the pushing device, the conveyor to an end B, and the end B refers to an upper side end of the working face; S7: making the mining machine Cl continue mining down to the lower end; making the mining machine C2 tram up without cutting; S8: making the mining machine C1 tram up to cut away a bottom step of the lower end; making the mining machine C2 continue tramming up, and cut the ore within a machine length plus a snaking distance from the upper end; S9: making the mining machine C1 tram up without cutting; pushing the conveyor a web from the lower end of the rear of an tramming direction of the mining machine C1 towards the face side by the pushing device, wherein a snaking distance between the end point of pushing and the mining machine Cl is maintained; and making the mining machine C2 mine down to cut away the bottom step of the upper end; and S10: making the mining machine Cl continue travelling up without cutting and stop at an initial position, and continuing pushing, by the pushing device, the conveyor, wherein a snaking distance between the end point of pushing and the mining machine Cl is maintained; and making the mining machine C2 tram up and stop till the upper end, i.e., the initial position is reached; and returning to Step S3 for the next cycle.
- 5. The method for mining an underground bauxite large inclined angle medium-thick ore bed with a dual mining machine according to claim 4, wherein in Step S3, the position where the mining machine Cl performs the first snaking on the face side in one cycle is close to a working face midpoint D.
- 6. The method for mining an underground bauxite large inclined angle medium-thick ore bed with a dual mining machine according to claim 1, 2, 3, 4 or 5, wherein an upper limit of the length of the working face is not less than 100 m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211177523.4 | 2022-09-26 | ||
| CN202211177523.4A CN115478858A (en) | 2022-09-26 | 2022-09-26 | Mining method of underground bauxite double-mining machine with large inclination angle and medium-thickness ore layer |
| PCT/CN2023/102558 WO2024066529A1 (en) | 2022-09-26 | 2023-06-27 | Mining method for underground bauxite large-dip-angle medium-thick ore bed dual-mining machine |
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| AU2023258380A1 true AU2023258380A1 (en) | 2024-04-11 |
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| AU2023258380A Pending AU2023258380A1 (en) | 2022-09-26 | 2023-06-27 | Method for mining underground bauxite large inclined angle medium-thick ore bed with dual mining machine |
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| Country | Link |
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| CN (1) | CN115478858A (en) |
| AU (1) | AU2023258380A1 (en) |
| WO (1) | WO2024066529A1 (en) |
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| CN115478858A (en) * | 2022-09-26 | 2022-12-16 | 天地上海采掘装备科技有限公司 | Mining method of underground bauxite double-mining machine with large inclination angle and medium-thickness ore layer |
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| PL156694B1 (en) * | 1988-03-28 | 1992-04-30 | Gorniczo Hutniczy Miedzi | Two-layer method for mining thick or very thick copper ore deposits |
| CN108843323B (en) * | 2018-08-13 | 2024-04-05 | 天地科技股份有限公司上海分公司 | Open-pit miner |
| CN108716400A (en) * | 2018-08-13 | 2018-10-30 | 天地科技股份有限公司上海分公司 | Self-travel type surface miner with more cutterheads |
| CN109403978B (en) * | 2019-01-04 | 2020-03-10 | 天地科技股份有限公司上海分公司 | Underground mechanical continuous mining method for hard mineral aggregate |
| CN111622762B (en) * | 2020-06-08 | 2021-09-07 | 天地科技股份有限公司上海分公司 | Mining process of double-roller mining machine |
| CN115478858A (en) * | 2022-09-26 | 2022-12-16 | 天地上海采掘装备科技有限公司 | Mining method of underground bauxite double-mining machine with large inclination angle and medium-thickness ore layer |
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