AU2021100151A4 - A mining engineering roadway supporting structure - Google Patents
A mining engineering roadway supporting structure Download PDFInfo
- Publication number
- AU2021100151A4 AU2021100151A4 AU2021100151A AU2021100151A AU2021100151A4 AU 2021100151 A4 AU2021100151 A4 AU 2021100151A4 AU 2021100151 A AU2021100151 A AU 2021100151A AU 2021100151 A AU2021100151 A AU 2021100151A AU 2021100151 A4 AU2021100151 A4 AU 2021100151A4
- Authority
- AU
- Australia
- Prior art keywords
- screw
- vertical plate
- plate
- hinged
- hitching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000005065 mining Methods 0.000 title claims abstract description 18
- 238000009434 installation Methods 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 claims description 6
- 239000011435 rock Substances 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 230000003993 interaction Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
- E21D23/0409—Aligning or guiding means for the supports or for the constitutive parts of the supports
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
The present invention discloses a mining engineering roadway supporting structure, which
comprises two upright posts, a first supporting component and a second supporting component
fixedly connected on the upright posts. The first supporting component comprises a first
transverse plate, a first vertical plate and a second vertical plate hinged at two ends of the first
transverse plate, wherein the first vertical plate, the second vertical plate and the first transverse
plate are hinged with a first fixing part. The second supporting component comprises a second
transverse plate, a third vertical plate and a fourth vertical plate hinged at two ends of the second
transverse plate, wherein the third vertical plate, the fourth vertical plate and the second
transverse plate are hinged with a second fixing part. The side of the fourth vertical plate is set
in contact with the side of the first vertical plate, and the side of the third vertical plate is set in
contact with the side of the second vertical plate. By improving the supporting structure, the
invention realizes the support of the roadway top plate, thereby avoiding the operation of
bolting the roadway top plate and reducing the influence of the roadway rock mass structure
on the roadway support.
Description
A mining engineering roadway supporting structure
[01] The invention belongs to the technical field of mining roadway support, in particular refers to a mining engineering roadway supporting structure.
[02] Because the technology of pillarless roadway protection can not only improve the recovery rate of mining resources, but also reduce the difficulty and cost of roadway maintenance, it has been studied all over the world. Among them, the stress environment and maintenance conditions of gob-side entry driving are better than those of gob-side entry retaining. The stability of rock mass around the roadway is an important factor to ensure the safety of work when adopting the method of gob-side entry driving to maintain the roadway.
[03] The existing roadway supporting structures mostly use anchor rods to drive into the rock above the roadway to protect the roadway. However, this roadway protection mode is often affected by the roadway rock mass structure, which can not guarantee the safety of the roadway supporting structure, thus affecting the safety of equipment and personnel.
[04] The purpose of the present invention is to provide a mining engineering roadway supporting structure to solve the above problems. By improving the supporting structure, the roadway top plate is supported by the supporting structure, thereby avoiding the operation of bolting on the roadway top plate and reducing the influence of the roadway rock mass structure on roadway support.
[05] To achieve the above purpose, the present invention provides the following scheme:
[06] A mining engineering roadway supporting structure comprises two upright posts, a plurality of first supporting components and a plurality of second supporting components fixedly connected on the upright posts. The first supporting component and the second supporting component are sequentially set in contact.
[07] The first supporting component comprises a first transverse plate, a first vertical plate and a second vertical plate hinged at two ends of the first transverse plate, wherein the first vertical plate and the second vertical plate are hinged with a first fixing part.
[08] The second supporting component comprises a second transverse plate, a third vertical plate and a fourth vertical plate hinged at two ends of the second transverse plate, wherein the third vertical plate, the fourth vertical plate and the second transverse plate are hinged with a second fixing part. The side of the fourth vertical plate is set in contact with the side of the first vertical plate, and the side of the third vertical plate is set in contact with the side of the second vertical plate.
[09] Preferably, the first fixing part comprises a first screw, a second screw, a third screw and a fourth screw, wherein one end of the first screw is hinged with the end of the first transverse plate, the other end of the first screw is threadedly connected with the first nut, one end of the second screw is hinged with the end of the second vertical plate, and the other end of the second screw is threadedly connected with the first nut. The first screw and the second screw have opposite thread directions.
[010] One end of the third screw is hinged with the end of the first vertical plate, the other end of the third screw is threadedly connected with the second nut, one end of the fourth screw is hinged with the end of the first transverse plate. The other end of the fourth screw is threadedly connected with the second nut, and the thread directions of the third screw and the fourth screw are opposite. The first screw and the third screw are on the same line, and the third screw and the fourth screw are on the same line, and the first screw and the second screw form a cross structure with the third screw and the fourth screw.
[011] Preferably, the second fixing part comprises the fifth screw, the sixth screw, the seventh screw and the eighth screw, and one end of the fifth screw is hinged with the end of the second transverse plate. The other end of the fifth screw is threadedly connected with the third nut, and one end of the sixth screw is hinged with the end of the fourth vertical plate, the other end of the sixth screw is threadedly connected with the third nut, and the thread direction of the fifth screw and the sixth screw are opposite.
[012] One end of the seventh screw is hinged with the end of the third vertical plate, and the other end of the seventh screw is threadedly connected with the fourth nut. One end of the eighth screw is hinged with the end of the second transverse plate, and the other end of the eighth screw is threadedly connected with the fourth nut. The thread directions of the seventh screw rod and the eighth screw rod are opposite. The fifth screw and the sixth screw are on the same line, and the seventh screw and the eighth screw are on the same line, and the fifth screw and the sixth screw form a cross structure with the seventh screw and the eighth screw.
[013] Preferably, the hitching part comprises the first hook fixedly connected to the bottom of the third vertical plate and the second hook fixedly connected to the bottom of the fourth vertical plate, the structure of the first hook and the fourth vertical plate faces outward.
[014] Preferably, the bottom of the first vertical plate is clamped in the second hook, and the bottom of the second vertical plate is clamped in the first hook.
[015] Preferably, one side of the first vertical plate, the second vertical plate, the third vertical plate and the fourth vertical plate is respectively fixedly connected with a hitching rod, and the hitching rod is provided with an auxiliary installation component.
[016] Preferably, the auxiliary installation component comprises the vault plate, the hitching block is fixedly connected to the bottom of the vault plate, and the hitching rod is clamped in the hitching block.
[017] Preferably, a groove is formed on one side of the hitching block close to the hitching rod, and the hitching rod is clamped in the groove.
[018] Preferably, the outer tops of a plurality of thefirst supporting components and the second supporting components are covered with barrier nets.
[019] The invention has the following technical effects:
[020] Two upright posts are respectively fixed on both sides of the roadway under the stratum. The first supporting component is fixed above one side upright post, and the first supporting component and the second supporting component are arranged in sequence, namely, the first vertical plate and the fourth vertical plate are closely attached, and the second vertical plate and the third vertical plate are closely attached. The second vertical plate is hung by the first hook, the first vertical plate is hung by the second hook, and each component of the first supporting component and second supporting component is turned into an inverted trapezoidal structure by rotating the first nut, the second nut, the third nut and the fourth nut, so that a plurality offirst supporting components and second supporting components are matched with the arc shape of the top plate of the roadway.
[021] A plurality of supporting structures are uniformly distributed along the axial direction of the roadway, the top of the outer sides of the first and second supporting components is coated with a barrier net to prevent the small gravel above the top plate from falling, the first and second supporting components are turned into adjustable inverted trapezoidal structures through the cooperation of nuts and screws of the first and second fixing parts, and the cooperation between the first and second supporting components meets the arc shape of the top plate of roadways with different sizes through the cooperation of the inverted trapezoidal structures.
[022] At the same time, because the inverted trapezoidal structures of the plurality of first supporting components and the second support components are matched, even if the top plate of the roadway collapses, two upright posts are matched between two adjacent inverted trapezoidal structures to generate interaction force, so that the resultant force direction of the interaction force can offset the collapse force of the roadway, thus avoiding the interaction between the anchor rod and the stratum, and finally avoiding the problem that the safety of roadway support is affected by geological problems.
[023] The distance between the two hitching blocks is matched with the distance between the two hitching rods. Before installing the first and second supporting components, the vault plate is fixed to the top plate of the roadway by expansion bolts or short bolts, and the hitching rods on each of the first and second supporting components are hung to the hitching blocks, thus facilitating the combined installation of the first and second supporting components.
[024] In order to explain the embodiments of the present invention or the technical scheme in the prior art more clearly, the figures needed in the embodiments will be briefly introduced below. Obviously, the figures in the following description are only some embodiments of the present invention, and for ordinary technicians in the field, other figures can be obtained according to these figures without paying creative labor.
[025] Fig. 1 is a schematic structural diagram of the present invention.
[026] Fig. 2 is a structural schematic diagram of the first supporting component.
[027] Fig. 3 is a schematic structural diagram of the second supporting component.
[028] Fig. 4 is a schematic diagram of the matching structure of the first supporting component and the second supporting component.
[029] Fig. 5 is a structural schematic diagram of embodiment 2.
[030] Fig. 6 is a schematic diagram of the matching structure of the first supporting component and the auxiliary installation component in embodiment 2.
[031] Among them,1 is stratum, 2 is barrier net, 3 is thefirst supporting component, 301 is the first transverse plate, 302 is the first vertical plate, 303 is the second vertical plate, 304 is the first screw, 305 is the second screw, 306 is the first nut, 307 is the third screw, 308 the is fourth screw, 309 is the second nut, 310 is the hitching rod, 4 is the second supporting component, 401 is the second transverse plate, 402 is the third vertical plate, 403 is the fourth vertical plate, 404 is the fifth screw, 405 is the sixth screw, 406 is the third nut, 407 is the seventh screw, 408 is the eighth screw, 409 is the fourth nut, 410 is the first hook, 411 is the second hook, 5 is the upright post, 6 is the vault plate, and 601 is the hitching block.
[032] The technical scheme in the embodiments of the present invention will be described clearly and completely with reference to the figures in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative labor belong to the scope of protection of the present invention.
[033] In order to make the above objects, features and advantages of the present invention more obvious and easy to understand, the present invention will be further explained in detail with reference to thefigures and specific embodiments.
[034] Embodiment 1:
[035] Referring to figs. 1-4, the mining engineering roadway supporting structure comprises two upright posts (5), a plurality of first supporting components (3) and a plurality of second supporting components (4) fixedly connected to the upright posts (5). The first support component (3) and the second support The second support component (4) comprises the second transverse plate (401), the third vertical plate (402) and the fourth vertical plate (403) hinged at two ends of the second transverse plate (401), wherein the third vertical plate (402), the fourth vertical plate (403) and the second transverse plate (401) are hinged with a second fixing part. The bottom of the third vertical plate (402) and the fourth vertical plate (403) are fixedly connected with the hitching part for connecting the first support component (3).
[036] The side of the fourth vertical plate (403) is set in contact with the side of the first vertical plate (302), and the side of the third vertical plate (402) is set in contact with the side of the second vertical plate (303).
[037] Furthermore, the first fixing part comprises the first screw (304), the second screw (305), the third screw (307) and the fourth screw (308), and one end of the first screw (304) is hinged with the end of the first transverse plate (301). The other end of the first screw (304) is threadedly connected with the first nut (306). One end of the second screw (305) is hinged with the end of the second vertical plate (303). The other end of the second screw (305) is threadedly connected with the first nut (306). The first screw (304) and the second screw (305) have opposite thread directions.
[038] One end of the third screw (307) is hinged with the end of the first vertical plate (302), the other end of the third screw (307) is threadedly connected with the second nut (309), one end of the fourth screw (308) is hinged with the end of the first transverse plate (301). The other end of the fourth screw (308) is threadedly connected with the second nut (309), and the thread directions of the third screw (307) and the fourth screw (308) are opposite. The first screw (304) and the third screw (305) are on the same line, and the third screw (307) and the fourth screw (308) are on the same line, and the first screw (304) and the second screw (305) form a cross structure with the third screw (307) and the fourth screw (308).
[039] Furthermore, the second fixing part comprises the fifth screw (404), the sixth screw (405), the seventh screw (407) and the eighth screw (408), and one end of the fifth screw (404) is hinged with the end of the second transverse plate (401). The other end of the fifth screw (404) is threadedly connected with the third nut (406), and one end of the sixth screw (405) is hinged with the end of the fourth vertical plate (403), the other end of the sixth screw (405) is threadedly connected with the third nut (406), and the thread direction of the fifth screw (404) and the sixth screw (405) are opposite.
[040] One end of the seventh screw (407) is hinged with the end of the third vertical plate (402), and the other end of the seventh screw (407) is threadedly connected with the fourth nut (409). One end of the eighth screw (408) is hinged with the end of the second transverse plate (401), and the other end of the eighth screw (408) is threadedly connected with the fourth nut (409). The thread directions of the seventh screw rod (407) and the eighth screw rod (408) are opposite. The fifth screw (404) and the sixth screw (405) are on the same line, and the seventh screw (407) and the eighth screw (408) are on the same line, and the fifth screw (404) and the sixth screw (405) form a cross structure with the seventh screw (407) and the eighth screw (408).
[041] Furthermore, the hitching part comprises the first hook (410) fixedly connected to the bottom of the third vertical plate (402) and the second hook (411) fixedly connected to the bottom of the fourth vertical plate (403), the structure of the first hook (410) and the fourth vertical plate (403) faces outward.
[042] Furthermore, the bottom of the first vertical plate (302) is clamped in the second hook (411), and the bottom of the second vertical plate (303) is clamped in the first hook (410).
[043] Furthermore, the outer tops of a plurality of the first supporting components (3) and the second supporting components (4) are covered with barrier nets (2).
[044] The construction process of this embodiment is as follows:
[045] Two upright posts (5) are respectively fixed on both sides of the roadway under the stratum (1). The first supporting component (3) is fixed above one side upright post (5), and the first supporting component (3) and the second supporting component (4) are arranged in sequence, namely, the first vertical plate (302) and the fourth vertical plate (403) are closely attached, and the second vertical plate (303) and the third vertical plate (402) are closely attached. The second vertical plate (303) is hung by the first hook (410), the first vertical plate (302) is hung by the second hook (411), and each component of the first supporting component (3) and second supporting component (4) is turned into an inverted trapezoidal structure by rotating the first nut (309), the second nut (309), the third nut (406) and the fourth nut (409), so that a plurality of first supporting components (3) and second supporting components (4) are matched with the arc shape of the top plate of the roadway.
[046] A plurality of supporting structures are uniformly distributed along the axial direction of the roadway, the top of the outer sides of the first (3) and second supporting components (4) is coated with the barrier net (2) to prevent the small gravel above the top plate from falling, the first (3) and second supporting components (4) are turned into adjustable inverted trapezoidal structures through the cooperation of nuts and screws of the first and second fixing parts, and the cooperation between the first (3) and second supporting components (4) meets the arc shape of the top plate of roadways with different sizes through the cooperation of the inverted trapezoidal structures.
[047] At the same time, because the inverted trapezoidal structures of the plurality of first supporting components (3) and the second support components (4) are matched, even if the top plate of the roadway collapses, two upright posts (5) are matched between two adjacent inverted trapezoidal structures to generate interaction force, so that the resultant force direction of the interaction force can offset the collapse force of the roadway, thus avoiding the interaction between the anchor rod and the stratum (1), and finally avoiding the problem that the safety of roadway support is affected by geological problems.
[048] Embodiment 2:
[049] Referring to figs. 5-6, the supporting structure of this embodiment is different from the first embodiment only in that one side of the first vertical plate (302), the second vertical plate (303), the third vertical plate (402), and the fourth vertical plate (403) are respectively fixedly connected with the hitching rod (310), and the hitching rod (310) is provided with an auxiliary installation component.
[050] The auxiliary installation component comprises the vault plate (6), the bottom of which is fixedly connected with a hitching block (601), and the hitching rod (310) is clamped in the hitching block (601).
[051] A groove is formed on one side of the hitching block (601) near the hitching rod (310), and the hitching rod (310) is clamped in the groove.
[052] The distance between the two hitching blocks (601) is matched with the distance between the two hitching rods (310). Before installing the first (3) and second supporting components (4), the vault plate (6) is fixed to the top plate of the roadway by expansion bolts or short bolts, and the hitching rods (310)on each of the first (3) and second supporting components (4) are hung to the hitching blocks (601), thus facilitating the combined installation of the first (3) and second supporting components (4).
[053] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner" and "outer", etc., is based on the orientation or position relationship shown in the figures, only for the convenience of describing the invention, rather than indicating or implying that the device or element referred to must have a specific orientation, or must be constructed and operated in a specific orientation. It cannot be understood as a limitation of the invention.
[054] Although the invention has been described with reference to specific examples, it will be appreciated by those skilled in the art that the invention may be embodied in many other forms, in keeping with the broad principles and the spirit of the invention described herein.
[055] The present invention and the described embodiments specifically include the best method known to the applicant of performing the invention. The present invention and the described preferred embodiments specifically include at least one feature that is industrially applicable
Claims (9)
1. A mining engineering roadway supporting structure, characterized by comprising
two upright posts (5), a plurality offirst supporting components (3) and a plurality of
second supporting components (4) fixedly connected to the upright posts (5). The first
supporting component (3) and the second supporting component (4) are sequentially
set in contact.
The first supporting component (3) comprises the first transverse plate (301), the first
vertical plate (302) and the second vertical plate (303) hinged at two ends of the first
transverse plate (301), wherein the first vertical plate (302), the second vertical plate
(303) and the first transverse plate (301) are hinged with the first fixing part.
The second supporting component (4) comprises the second transverse plate (401), the
third vertical plate (402) and the fourth vertical plate (403) hinged at two ends of the
second transverse plate (401), wherein the third vertical plate (402), the fourth vertical
plate (403) and the second transverse plate (401) are hinged with a second fixing part.
The bottom of the third vertical plate (402) and the fourth vertical plate (403) arefixedly
connected with the hitching part for connecting the first supporting component (3).
The side of the fourth vertical plate (403) is set in contact with the side of the first
vertical plate (302), and the side of the third vertical plate (402) is set in contact with
the side of the second vertical plate (303).
2. The mining engineering roadway supporting structure according to claim 1,
characterized in that the first fixing part comprises the first screw (304), the second
screw (305), the third screw (307) and the fourth screw (308), and one end of the first screw (304) is hinged with the end of the first transverse plate (301). The other end of the first screw (304) is threadedly connected with the first nut (306). One end of the second screw (305) is hinged with the end of the second vertical plate (303). The other end of the second screw (305) is threadedly connected with the first nut (306). The first screw (304) and the second screw (305) have opposite thread directions.
One end of the third screw (307) is hinged with the end of thefirst vertical plate (302),
the other end of the third screw (307) is threadedly connected with the second nut (309),
one end of the fourth screw (308) is hinged with the end of the first transverse plate
(301). The other end of the fourth screw (308) is threadedly connected with the second
nut (309), and the thread directions of the third screw (307) and the fourth screw (308)
are opposite. The first screw (304) and the third screw (305) are on the same line, and
the third screw (307) and the fourth screw (308) are on the same line, and the first screw
(304) and the second screw (305) form a cross structure with the third screw (307) and
the fourth screw (308).
3. The mining engineering roadway supporting structure according to claim 1,
characterized in that the second fixing part comprises the fifth screw (404), the sixth
screw (405), the seventh screw (407) and the eighth screw (408), and one end of the
fifth screw (404) is hinged with the end of the second transverse plate (401). The other
end of the fifth screw (404) is threadedly connected with the third nut (406), and one
end of the sixth screw (405) is hinged with the end of the fourth vertical plate (403), the
other end of the sixth screw (405) is threadedly connected with the third nut (406), and
the thread direction of the fifth screw (404) and the sixth screw (405) are opposite.
One end of the seventh screw (407) is hinged with the end of the third vertical plate
(402), and the other end of the seventh screw (407) is threadedly connected with the
fourth nut (409). One end of the eighth screw (408) is hinged with the end of the second
transverse plate (401), and the other end of the eighth screw (408) is threadedly
connected with the fourth nut (409). The thread directions of the seventh screw rod
(407) and the eighth screw rod (408) are opposite. The fifth screw (404) and the sixth
screw (405) are on the same line, and the seventh screw (407) and the eighth screw
(408) are on the same line, and the fifth screw (404) and the sixth screw (405) form a
cross structure with the seventh screw (407) and the eighth screw (408).
4. The mining engineering roadway supporting structure according to claim 1,
characterized in that the hitching part comprises the first hook (410) fixedly connected
to the bottom of the third vertical plate (402) and the second hook (411) fixedly
connected to the bottom of the fourth vertical plate (403), the structure of the first hook
(410) and the fourth vertical plate (403) faces outward.
5. The mining engineering roadway supporting structure according to claim 4,
characterized in that the bottom of the first vertical plate (302) is clamped in the second
hook (411), and the bottom of the second vertical plate (303) is clamped in the first
hook (410).
6. The mining engineering roadway supporting structure according to claim 1,
characterized in that one side of the first vertical plate (302), the second vertical plate
(303), the third vertical plate (402) and the fourth vertical plate (403) is respectively
fixedly connected with a hitching rod (310), and the hitching rod (310) is provided with
an auxiliary installation component.
7. The mining engineering roadway supporting structure according to claim 6,
characterized in that the auxiliary installation component comprises the vault plate (6),
the hitching block (601) is fixedly connected to the bottom of the vault plate (6), and
the hitching rod (310) is clamped in the hitching block (601).
8. The mining engineering roadway supporting structure according to claim 7,
characterized in that a groove is formed on one side of the hitching block (601) close to
the hitching rod (310), and the hitching rod (310) is clamped in the groove.
9. The mining engineering roadway supporting structure according to claim 1,
characterized in that the outer tops of a plurality of the first supporting components (3)
and the second supporting components (4) are covered with barrier nets (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021100151A AU2021100151A4 (en) | 2021-01-12 | 2021-01-12 | A mining engineering roadway supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021100151A AU2021100151A4 (en) | 2021-01-12 | 2021-01-12 | A mining engineering roadway supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2021100151A4 true AU2021100151A4 (en) | 2021-04-08 |
Family
ID=75280466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021100151A Ceased AU2021100151A4 (en) | 2021-01-12 | 2021-01-12 | A mining engineering roadway supporting structure |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2021100151A4 (en) |
-
2021
- 2021-01-12 AU AU2021100151A patent/AU2021100151A4/en not_active Ceased
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| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |