GB2217752A - Supporting the face throughway in underground mine workings - Google Patents
Supporting the face throughway in underground mine workings Download PDFInfo
- Publication number
- GB2217752A GB2217752A GB8908967A GB8908967A GB2217752A GB 2217752 A GB2217752 A GB 2217752A GB 8908967 A GB8908967 A GB 8908967A GB 8908967 A GB8908967 A GB 8908967A GB 2217752 A GB2217752 A GB 2217752A
- Authority
- GB
- United Kingdom
- Prior art keywords
- face
- roadway
- arches
- arch
- bars
- 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.)
- Granted
Links
- 230000003245 working effect Effects 0.000 title claims description 4
- 238000005520 cutting process Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 23
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 8
- 239000011707 mineral Substances 0.000 claims description 8
- 239000003245 coal Substances 0.000 description 7
- 101150111329 ACE-1 gene Proteins 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000000284 resting effect Effects 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
- E21D11/14—Lining predominantly with metal
- E21D11/36—Linings or supports specially shaped for tunnels or galleries of irregular cross-section
- E21D11/367—Linings or supports specially shaped for tunnels or galleries of irregular cross-section for junction with the longwall coal face
-
- 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
-
- 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
- E21D23/0091—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 at the junction with the working face
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)
- Remote Sensing (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
- Catching Or Destruction (AREA)
Description
22.17752 A METHOD FOR SAFEGUARDING THE FACE THROUGHWAY IN UNDERGROUND MINE
WORKINGS AND A ROADWAY SUPPORT ARCH ADAPTED FOR THE METHOD:
This invention relates to a method for safegurding the face cutting length in underground mine workings having a mineral cutting face and a service roadway, more particularly a roadway accommodating a drive head or station for a face conveyor and an associated mineral winning machine, in which the roadway has support arches which are opened towards the cutting face over the face throughway, self-advancing supports are set up in the roadway, the opened arches are shored up by the self-advancing supports. and behind the face throughway the arches on the e.g. coal,, face side are restored as required. The invention also includes a roadway support arch for carrying out the inventive method.
In the known process to which the invention relates (DE 12 6 260), the opened arches are shored up directly on the self-advancing supports set up in the roadway. Spe ci al connectors are required for this purpose. Moreover, the length of the shored region in the axial direction of the roadway is limited to the length of the self-advancing supports. It is also known to dispose in the roadway selfadvancing supports of constructions which cannot be used along the cutting face (DE 26 46 563, DE 27 45 429).
The object of the invention is to modify and improve a method of the type initially described, in such a manner that the operations are simplified and further safeguarded.
According to a f irst aspect of the present invention, is there is provided a method for safeguarding the face cutting length (as herein defined) in underground mine workings having a mineral cutting face and a service roadwayr mor e particularly a roadway accommodating a drive head for a f ace conveyor and an associated mineral winning machinei in which the roadway has support arches which are opened towards the cutting face over the face throughwayg, selfadvancing supports are set up in the roadway, the opened arches are shored up by the self-advancing supportsp and behind the face throughway the opened arches on the face side are restored as required, with the arches in the face cutting length provided with ridge-segment stiffening cross-bars running at right angles to the roadway axis, and disposed at a height within reach of the self-advancing supports, and connecting rails running along the roadway axis, and adapted to rest on the self-advancing supports, are provided on or at the underside of the stiffening cross-bars, at least in the vicinity of the face throughway.
According to a second aspect of the inventLon, there is provided a roadway support arch for carrying out the above defined method, comprising ridgesegment stiffening cross-bars running at right angles to the roadway axis, and connecting rails running along the roadway axis and adapted, in use, to rest on self- advancing supports provided on or at the underside of the stiffening cross-bars.
In the context of the invention, the term "vicinity of the face throughway" embraces not only the length within which c 11 the arches have been opened, but also extensions ahead of and behind the throughway. It is self-evident that in the method of the invention the self-advancing supports in the roadway and along the cutting face respectively can be coupled together for the purpose of operational organisation and control, since they must accompany the rest of the equipment advancing as the mineral face advances and must be manipulated accordingly. However#, it is also possible to manipulate the self- advancing supports disposed in the roadway as independent unit s. In general, these self-advancing supports operating within the roadway extend as far as possible at the e.g. coal, face on the cutting-face side. It usually suffices to provide two such self- advancing supports in the roadway.
It is self-evident that the connecting rails, which can also be provided on the arches, must have adequate buckling resistance and can be pre-attachable. The connecting rails carry the entire roadway supporting loads when an arch is opened immediately ahead of the face cutting length,, until the self-advancing support has been set up under the said arch and made ready to shore it up. Since underground mining operations are usually carried out with telescopic arches, it is within the scope of the invention to adopt sectional stiffening cross-bars which can telescope in the axial direction, and to assemble the sections with the aid of suitable connecting clamps.
In order to improve the configurational strength of the arches and so adapt them in the face throughway that they can directly withstand the loads placed upon them in the method of the invention, the invention teaches that stiffening struts are disposed in the spaces between the stiffening cross-bars and the ridge segments of the arches,, to form a truss.
The connecting rails can also be shored up (on the 5 e.g. coal seam) ahead of the face throughway and/or on the spoil behind the face throughway. It is also possible to employ arches of a double- arch design (at least on a coal etc. seam side) towards the cutting face, in which case the stiffening cross-bars and the connecting rails are disposed between the paired arch segments. In this and other embodiments, the stiffening cross-bars and the connecting rails can also be prefabricated as sub-assemblies or units.
The invention will now be described in greater detail, by way of examples, with reference to the accompanying drawings, in which:- Figure 1 is a vertical section through an underground mine working having a cutting face and a service roadway, in the vicinity of the face throughway; Figure 2 is a section similar to Figure 1, ahead of the face throughway; Figure 3 corresponds to Figure 1 but shows another arrangement, behind the face throughway; Figure 4 corresponds to Figure 1 but shows another arrangement; Figure 5 corresponds to Figure 1 but shows yet another arrangement; and Figure 6 corresponds to Figure 1 but shows yet another 1 z arrangement.
Figures 1 to 6 depict an underground mine working having a cutting face 1 and a service roadway 2. More particularly,, the roadway can be of the type adapted to accommodate a drive head or station for a face conveyor#, extending along the face 1, and an associated winning machine adapted to traverse the face, though this equipment has been omitted from the Figures for the sake of clarity. The roadway 2 has support arches 3, which have been opened towards the cutting face 1 over a face throughway. This is shown in Figures lr 5 and 6. It is self-evident that a plurality of successive arches 3 will have to be opened in the length of the gallery over which the face throughway extends, i.e. over the area where cutting operations are in progress. The arches 3 in the face throughway, and also ahead of and behind the face cutting length, have been provided with stiffening cross-bars 4 running at right angles to the roadway axis. The height at which they are set is such that they are capable of being shored up by self-advancing, hydraulically powered supports 5 of the type usually provided along the cutting face 1. The said self-advancing supports 5 are disposed along the cutting face as shown diagrammatically on the left in Figure 1 beyond the only two that are illustrated. However, simi:lar self-advancing supports 5 are also provided in the roadway 2, where they are extended rather higher than along the cutting f ace 1. The opened arches 3 are shored up on the self- advancing supports 5 there provided, which abut against the stiffening cross-bars 4 already referred to via interposed connecting rails 6, which have adequate buckling resistenace, run in the axial direction of the roadway, and are provided on,, and/or carried by, arches 3 and/or, on the stiffening cross-bars 4 in the vicinity of the face throughway. As regards the arrangement of the stiffening cross-bars 4 and the connecting rails 6,, use can be made of the attachments commonly used in roadway arches or rings, such as straps, connecting bolts, connecting strips and the like, as indicated purely schematically. In the embodiments shown in Figures 1j, 2, 4 and 6r the connecting rails 6 are disposed underneath the stiffening cross-bars 4. The self-advancing supports 5 are similarly disposed. Figure 3 shows a stiffening cross-bar 4 which can telescope in the axial direction. Thus, it consists of two sections inserted in a suitable clamp. In the embodiment shown in Figure 4 the spaces between the stifferning cross-bars 4 and the roof segments of the arches 3 contain stiffening struts 7 forming a truss.
Figure 5 makes it clear that one can use arches 3 the face-side legs of which are replaced by the coal seam 8 ahead of the face throughway and of the spoil behind the face cutting length. A reinforced concrete rail 9 is interposed between the coal seam 8 or alternatively spoil in the goaf areaj, and the arches 3 resting thereon. Alternatively, one can employ arches 3 of a double-arch design 10, at least on the coal etc. face side towards the cutting face 1, in which case the stiffening cross-bars 4 and the connecting rails 6 are disposed between the paired arch segments 10.
An arch 3 particularly suited to carrying out the i method of the invention consists of legs and a ridge segment, and in this case the stiffening cross-bars 4 are attached across the ridge segments,, at least in the vicinity of the face cutting length. The stiffening cross- bars 4 for a roadway arch of this type are usually of a telescopic design. Adjacent arches 3 are additionally connected togethert directly or indirectly, by connecting rails 6 running in the axial direction of the roadway. It is self-evident that the stiffening cross-bars 4 and the connecting rails 6 are progressively removed as and when the face throughway is progressively advanced during mineral winning operations.
Claims (17)
1. A method for safeguarding the face throughway (as herein defined) in underground mine workings having a mineral cutting face and a service roadway, more particularly a roadway accommodating a drive head for a face conveyor and an associated mineral winning machine, in which the roadway has support arches which are opened towards the cutting face over the face cutting length, selfadvancing supports are set up in the roadway, the opened arches are shored up by the self-advancing supports, and behind the face throughway the opened arches on the face side are restored as required, with the arches in the face cutting length provided with ridge-segment stiffening cross-bars running at right angles to the roadway axis, and disposed at a height within reach of the self-advancing supports, and connecting rails running along the roadway axis and adapted to rest on the self-advancing supports are provided on or at the underside of the stiffening cross-bars, at least in the vicinity of the face throughway.
2. A method as in Claim lt wherein the connecting rails are also provided on the arches.
3. A method as in Claim 1 or 29, wherein the cross- bars are telescopic in their axial direction.
4. A method as in any of Claims 1 to 3, wherein stiffening struts are disposed in the spaces between the stiffening cross-bars and the ridge segments of the arches to form a truss.
j 1 i 1
5. A method as in any of Claims 1 to 4. wherein the connecting rails are shored up ahead of the face cutting length and/or on the spoil behind the face throughway.
6. A method as in any of Claims 1 to 5, wherein the arches are of a double-arch design,, at least on the side towards the cutting face#, and the stiffening cross-bars and the connecting rails are disposed between the paired arch segments.
7. A method substantially as hereinbefore described with reference to Figures 1 and 2 of the accompanying drawings.
8. A method substantially as hereinbefore described with reference to Figure 3 of the accompanying drawings.
9. A method substantially as hereinbefore described with reference to Figure 4 of the accompanying drawings.
10. A method substantially as hereinbef ore described with reference to Figure 5 of the accompaning drawings.
11. A method substantially as hereinbefore described with reference to Figure 6 of the accompaning drawings.
12. A roadway support arch for carrying out the method of Claim 1, comprising ridge-segment stiffening crossbars running at right angles to the roadway axis, and connecting rails running along the roadway axis and adapted, in use,, to rest on self-advancing supports provided on or at the underside of the stiffening cross-bars.
13. An arch substantially as hereinbef ore described with references to Figures 1 and 2 of the accompanying drawings.
- 10
14. An arch substantially as hereinbef ore described with reference to Figure 3 of the accompanying drawings.
15. An arch substantially as hereinbefore described with reference to Figure 4 of the accompanying drawings.
16. An arch substantially as hereinbefore described with reference to Figure 5 of the accompanying drawings.
17. An arch substantially as hereinbefore described with reference to Figure 6 of the accompanying drawings.
0 z, Published 19W &tTheP&tentOMce.StatcHouse,e&"?i EEigh HolbornLondon WCIR 4TP- Further OoPies maybe obtalneciftmThepatentorl1w. jk6las Branch, Elt Mazy Cray Orplr4wn, Kent Mv5 MO. Printed by Multiplex tftbnltues ltd, St Mary Cray, Kant, son. 1/87
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19883813593 DE3813593C1 (en) | 1988-04-22 | 1988-04-22 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8908967D0 GB8908967D0 (en) | 1989-06-07 |
| GB2217752A true GB2217752A (en) | 1989-11-01 |
| GB2217752B GB2217752B (en) | 1992-05-06 |
Family
ID=6352654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8908967A Expired - Fee Related GB2217752B (en) | 1988-04-22 | 1989-04-20 | A method for safeguarding the face cutting length in underground mine workings and a roadway support arch adapted for the method |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE3813593C1 (en) |
| GB (1) | GB2217752B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593500B (en) * | 2017-01-16 | 2018-11-27 | 福州大学 | It is a kind of for Underground Metallic Mines tunnel Collapsed zone and the device of crushed zone supporting |
| CN107191203B (en) * | 2017-04-05 | 2023-11-28 | 中铁二十二局集团第一工程有限公司 | Temporary transverse strut device capable of adjustably controlling tunnel surrounding rock convergence deformation and construction method |
| CN117868923B (en) * | 2024-03-07 | 2024-05-14 | 山西宏厦第一建设有限责任公司 | Advanced support equipment for coal mine underground roadway tunneling and support method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1012720A (en) * | 1961-08-25 | 1965-12-08 | Bergbaustahl Gmbh & Co | Improvements in or relating to support systems for mines |
| GB1111715A (en) * | 1964-09-18 | 1968-05-01 | Coal Industry Patents Ltd | Mine roof supports |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1176085B (en) * | 1961-05-05 | 1964-08-20 | Bwg Bergwerk Walzwerk | Temporary expansion of the route |
| DE1191779B (en) * | 1963-12-12 | 1965-04-29 | Aug Kloenne Fa | Arch support at the strut entrance |
| DE1266260B (en) * | 1965-02-03 | 1968-04-18 | Hansjoachim Von Hippel Dr Ing | Support device for the drive station of a face conveyor |
| DE2646562B2 (en) * | 1976-10-15 | 1978-11-02 | Bochumer Eisenhuette Heintzmann Gmbh & Co, 4630 Bochum | Auxiliary expansion for the transition to the longwall section |
| DE2745429C2 (en) * | 1977-10-08 | 1983-10-20 | Bochumer Eisenhütte Heintzmann GmbH & Co, 4630 Bochum | Migrating auxiliary support for the transitional area of the longwall section |
-
1988
- 1988-04-22 DE DE19883813593 patent/DE3813593C1/de not_active Expired
-
1989
- 1989-04-20 GB GB8908967A patent/GB2217752B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1012720A (en) * | 1961-08-25 | 1965-12-08 | Bergbaustahl Gmbh & Co | Improvements in or relating to support systems for mines |
| GB1111715A (en) * | 1964-09-18 | 1968-05-01 | Coal Industry Patents Ltd | Mine roof supports |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3813593C1 (en) | 1989-09-07 |
| GB8908967D0 (en) | 1989-06-07 |
| GB2217752B (en) | 1992-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20000420 |