GB2042020A - Temporary mine arch and prop positioning device - Google Patents
Temporary mine arch and prop positioning device Download PDFInfo
- Publication number
- GB2042020A GB2042020A GB7905594A GB7905594A GB2042020A GB 2042020 A GB2042020 A GB 2042020A GB 7905594 A GB7905594 A GB 7905594A GB 7905594 A GB7905594 A GB 7905594A GB 2042020 A GB2042020 A GB 2042020A
- Authority
- GB
- United Kingdom
- Prior art keywords
- equipment
- roof support
- frame assembly
- roadway
- roof
- 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.)
- Withdrawn
Links
- 238000009434 installation Methods 0.000 claims description 9
- 238000005253 cladding Methods 0.000 description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- 239000011435 rock Substances 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 2
- 241000272165 Charadriidae Species 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
-
- 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
- E21D23/0086—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor in galleries
- E21D23/0095—Temporary supports at the driving front
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)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A temporary mine arch and prop positioning device includes an adjustable frame 7 having two hydraulic props 11 on skids 13. The device is advanced by three rams 15, two of which are pivoted to the props 11 and attached by brackets 17 to a permanent arch 6, the third of which is mounted within a telescopic beam 29 attached to the top of the frame 7 and engaging, by a spring loaded pawl 7, the permanent arch 6. Cranked lifting arms 24, 25, which are pivoted at 23 to the beam 29 and actuated by a ram 31, are used to raise crown sections 6'' of new permanent arches to the roof. <IMAGE>
Description
SPECIFICATION
Temporary mine roof support equipment
This invention relates to temporary roof support equipment for installation in underground roadways or tunnels.
In particular, although not exclusively, the present invention relates to temporary roof support equipment for installation in an underground mine roadway which is formed adjacent to a longwall face and which is supported by a series of spaced roof support units for example, arch or beam roof supports. As the longwall face is advanced into the unmined rock or mineral the roadway is extended in stages. At each stage at least one new roof support unit is installed to support the newly exposed roadway roof.
One problem encounted with this mining practice is that the conventional supports are not preloaded against the roof and permit bed separation as the roof lowers itself onto the permanent supports. This bed separation causes the eventual weight on the supports to be greater than necessary.
It is common practice for cladding or lagging to be placed over permanent roof support units and this creates a problem as once a roof support unit is set it is often difficult to manoeuvre new cladding or lagging over the units the roadway is further extended and a further roof support unit is installed.
An object of the present invention is to provide temporary roof support equipment which tends to overcome or reduce the above mentioned problems.
Accordingly, the present invention provides temporary roof support equipment for installation in an underground roadway or tunnel supported by a series of permanently set, spaced roof support units which is extended by the installation of new permanently set, spaced roof support units as the roadway is advanced, comprising an adjustable frame assembly having, in use, two operational modes, in a first mode the frame assembly is urged towards a roadway or tunnel roof supporting position and in a second mode the frame assembly is urged towards a partially collapsed position in which it can be conveyed beneath a permanently set roof support unit, the frame assembly being adjusted from one mode to the other mode under the action of at least one hydraulic ram.
Preferably, at least one further hydraulic ram is provided for advancing the adjustable frame assembly along the roadway or tunnel.
Conveniently, a device is mounted on the frame assembly for lifting sections of the permanent roof support units during installation.
By way of example only, one embodiment of the present invention will be described with reference to the accompanying drawings, in which Figure 1 is a side view of an underground mine roadway supported by permanently set, spaced roof support units and including temporary roof support equipment constructed in accordance with the present invention;
Figure 2 is a plan of Fig. 1;
Figure 3 is a sectional view along line Ill-Ill of Fig. 2;
Figure 4 is a sectional view of a detail of
Fig. 1; and
Figure 5, 6 and 7 are diagrammatic side views similar to Fig. 1 but on a reduced scale and illustrating different operationsl positions.
The drawings show an underground mine roadway 1 leading to one end of a longwall face 2 formed in a mineral seam 4, the face 2 being advanced as more mineral is extracted from the seam, and the roadway being extended by the excavation of rock or mineral from a working lip 5. The roadway is supported by a series of permanently set, spaced roof support units 6, for example, arch beam assemblies, installed along the length of the roadway, as the roadway is extended new roof support units 6 are installed to extend the series. The drawings also show adjustable temporary roof support equipment 7 constructed in accordance with the present invention.
The adjustable temporary roof support equipment 7 comprises a rigid arch section 10 bridging two adjustable legs 11 including a telescopic arrangement effective height of which can be varied by a hydraulic ram 1 2.
The base element of the telescopic arrangement is provided with a floor mounted skid 1 3 for sliding along the mine floor to advance the equipment 7 under the action of substantially horizontal hydraulc rams 15, two of which are pivotally secured to the base elements by mounting brackets 1 6 and anchorable to brackets 1 7 fixedly attached to a permanently set roof support unit. The third hydraulic ram 1 5 is mounted within a telescopic central beam 29 and is attached to the top member of the permanent support and carries a spring loaded clip 42 which locates against the permanently set roof support unit.
Three mine roof engaging pads 1 8 are carried by the rigid arch section 10, the gaps between the pads being provided to accommodate struts 20 fixed between the permanently set roof support units.
The equipment 7 also comprise a device 21 for assisting in the erection of newly installed permanent roof support units. The device 21 comprising two cranked telescopic arm arrangements 22 pivotally connected at 23 to one end of a central telescopic beam 29 supportedly secured at its other end to the rigid arch section 1 0. One limb of each crank arrangement comprises two connected arm members 24 and 25, the arm members being connected by vertical members 26 fixed to the end of the arm member 24 and arm member 25. The end of each arm member 24 remote from the member 26 supports a cross saddle 27 for supporting a crown section of a roof support unit 6" (as shown in Figs. 1 and 2).
The other limb 30 each cranked armed arrangement is pivotally connected to one end of a hydraulic ram 31 anchored at its other end to a pivotal mounting 32 fixedly mounted on the central beam 29. Operation of the ram 31 raises or lowers the arm members 24, 25 to raise or lower the cross saddle with respect to the mine floor.
The adjustable temporary roof support equipment 7 is adjustable between two operational modes. In a first mode ie a roof supporting mode as shown in the drawings, the equipment 7 is urged towards the mine roof to provide temporary support, the rams 12 being urged to increase the length of the legs 11. In second mode, ie a partially collapsed or retracted mode, the equipment is urged into a position in which it can be conveyed beneath a permanently set roof support unit, the rams 1 2 are retracted to reduce the vertical length of the legs 11 to lower the rigid arch section including the roof engaging pads 1 8 to within the inner profile defined by the permanently set, roof support units.In this position the advancing rams 15 are extended to urge the skids 1 3 along the mine floor to advance the equipment under the newly erected permanent roof support.
The sequence of operation will now be described with reference to the Fig. 5, 6, and 7.
In Fig. 5 a newly erected permanent roof support unit 6' has just been erected adjacent to the newly extended working lip 5 to extend the series of permanent roof support units.
However, as indicated in Fig. 5 the roof support unit is not set to the mine roof but is left spaced away from the mine roof. Fig. 5 also indicates that the mine roof newly exposed by the recent extention of the roadway is supported by the temporary roof support equipment 7 which is set to the mine roof under the action of the hydraulic 12 mounted in each leg and as indicated in Figs. 1 to 4, the cladding or lagging 40 is trapped between the temporary support and the roof.
The roadway then is further extended by excavation of more rock or mineral from the working lip 5, the new roadway extention substantially being equal to the spacing of the permanently set roof support units. As shown in Fig. 6 a further permanent roof support unit 6" is erected in the roadway adjacent to the newly formed working lip and the newly exposed mine roof. Again this roof support unit 6" is not set to the mine roof. The cladding or lagging 40 then is placed all around the last two erected permanent roof support units 6' and 6" to close the space between the two units, the purpose of the clagging or lagging being to prevent broken rock falling through the space between the units.As both the units 6' and 6" are spaced from the mine roof the cladding or lagging can be placed behind these units without the problems arising when the units are set to the mine roof and in contact with the mine roof.
When cladding or lagging has been placed all around the units 6' and 6" and struts 20 assembled in position, the roof support unit 6' is permanently set to a mine roof supporting position by extension of stilts 41 (see Figs. 1 and 3) located on the feet of the unit.
Upon the unit 6' being set to the mine roof pinning the cladding or lagging in position, the temporary roof unit equipment 7 is collapsed by the retraction of the hydraulic rams 1 2 to lower the rigid arch section 10 together with the roof engaging pads 1 8 until all the parts of the equipment 7 lie within the inner profile of the permanently set roof support unit 6'. The equipment 7 then is advanced by the action of the hydraulic rams 1 5 which slides the skids 1 3 over the mine floor until the equipment is adjacent to the permanent roof support unit 6'8 (as shown in Fig. 7).
The hydraulic rams 12 are extended to urge the rigid arch section 10 upwards to move the pad 1 8 into a roof engaging position supporting the newly exposed mine roof. The anchor mounting brackets 1 7 are moved to the next set roof support unit ready for the next advance of the equipment 7. The top advancing ram 15 is retracted until the spring loaded clip 42 just passes under a permanent roof support and is able to locate against the front of this support in readiness to afford a reaction load against the rear end of the upper advancing ram 15.
The roadway then is further extended by excavation of more rock or mineral from the working lip 5, the whole of the above described procedure being repeated.
It will be seen from the above description that the present invention provides temporary roof support equipment which is capable of providing rapid support to a newly exposed mine roof in a freshly advanced roadway and which enables cladding or lagging to be placed behind the permanent roof support units before they are set to the mine roof.
Claims (7)
1. Temporary roof support equipment for installation in an underground roadway or tunnel supported by a series of permanently set, spaced roof support units which is extended by the installation of new permanently set, spaced roof support units as the roadway is advanced, comprising an adjustable frame assembly having, in use, two operational modes, in a first mode the frame assembly is urged towards a roadway or tunnel roof supporting position and in a second mode the frame assembly is urged towards a partially collapsed position in which it can be conveyed beneath a permanently set roof support unit, the frame assembly being adjusted from one mode to the other mode under the action of at least one hydraulic ram.
2. Equipment as claimed in claim 1, in which at least one further hydraulic ram is provided for advancing the adjustable frame assembly along the roadway or tunnel.
3. Equipment as claimed in claim 1 or 2, in which a device is mounted on the frame assembly for lifting sections of the permanent roof support units during installation.
4. Equipment as claimed in claim 1, 2 or 3, in which the adjustable frame assembly comprises a rigid arch section support or two telescopically adjustable legs.
5. Equipment as claimed in claim 4, in which the telescopically adjustable legs comprise hydraulic rams.
6. Equipment as claimed in claim 4 or 5, in which the telescopically adjustable legs comprise floor mounted skids.
7. Temporary roof support equipment for installation in an underground roadway or tunnel, substantially as described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7905594A GB2042020A (en) | 1979-02-16 | 1979-02-16 | Temporary mine arch and prop positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7905594A GB2042020A (en) | 1979-02-16 | 1979-02-16 | Temporary mine arch and prop positioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2042020A true GB2042020A (en) | 1980-09-17 |
Family
ID=10503251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7905594A Withdrawn GB2042020A (en) | 1979-02-16 | 1979-02-16 | Temporary mine arch and prop positioning device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2042020A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108643942A (en) * | 2018-07-16 | 2018-10-12 | 西安科技大学 | Inverted arch when a kind of hydraulic pressure adjustable adjacent |
| CN109236331A (en) * | 2018-11-20 | 2019-01-18 | 中铁五局集团第工程有限责任公司 | A kind of steel arch rack trolley suitable for the micro- bench cut method in tunnel |
| CN110043299A (en) * | 2019-05-14 | 2019-07-23 | 江苏中贵重工有限公司 | A kind of suspension device and roofboltier |
| CN113958346A (en) * | 2021-10-21 | 2022-01-21 | 中国铁建重工集团股份有限公司 | Many pin bow member installation device |
-
1979
- 1979-02-16 GB GB7905594A patent/GB2042020A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108643942A (en) * | 2018-07-16 | 2018-10-12 | 西安科技大学 | Inverted arch when a kind of hydraulic pressure adjustable adjacent |
| CN108643942B (en) * | 2018-07-16 | 2023-11-10 | 西安科技大学 | Temporary inverted arch with adjustable hydraulic pressure |
| CN109236331A (en) * | 2018-11-20 | 2019-01-18 | 中铁五局集团第工程有限责任公司 | A kind of steel arch rack trolley suitable for the micro- bench cut method in tunnel |
| CN109236331B (en) * | 2018-11-20 | 2024-03-22 | 中铁五局集团第一工程有限责任公司 | Steel arch trolley suitable for tunnel micro-step excavation method |
| CN110043299A (en) * | 2019-05-14 | 2019-07-23 | 江苏中贵重工有限公司 | A kind of suspension device and roofboltier |
| CN113958346A (en) * | 2021-10-21 | 2022-01-21 | 中国铁建重工集团股份有限公司 | Many pin bow member installation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |