CA1165572A - Mine-roof supports - Google Patents
Mine-roof supportsInfo
- Publication number
- CA1165572A CA1165572A CA000407538A CA407538A CA1165572A CA 1165572 A CA1165572 A CA 1165572A CA 000407538 A CA000407538 A CA 000407538A CA 407538 A CA407538 A CA 407538A CA 1165572 A CA1165572 A CA 1165572A
- Authority
- CA
- Canada
- Prior art keywords
- axis
- cantilever
- ram
- mine
- 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.)
- Expired
Links
- 101100536883 Legionella pneumophila subsp. pneumophila (strain Philadelphia 1 / ATCC 33152 / DSM 7513) thi5 gene Proteins 0.000 description 1
- 241000353097 Molva molva Species 0.000 description 1
- 101100256746 Mus musculus Setdb1 gene Proteins 0.000 description 1
- 101100240664 Schizosaccharomyces pombe (strain 972 / ATCC 24843) nmt1 gene Proteins 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
- E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
- E21D23/0013—Frame type supports
-
- 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
- E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
- E21D23/063—Retractable cantilever extensions therefor
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)
- Body Structure For Vehicles (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
DH.2486 C
ABSTRACT OF THE DISCLOSURE
"MINE-ROOF SUPPORTS"
A mine-roof support has a roof-engageable member and two cantilevers, movable by rams, between housed positions substantially within the member and extended positions in which one cantilever projects from one end of the member and the other cantilever projects from the other end of the member.
In order to reduce the size of the support, the rams are inclined to the axis of the roof-engageable member, one ram being to one side of that axis and the other ram being to the other side of that axis.
ABSTRACT OF THE DISCLOSURE
"MINE-ROOF SUPPORTS"
A mine-roof support has a roof-engageable member and two cantilevers, movable by rams, between housed positions substantially within the member and extended positions in which one cantilever projects from one end of the member and the other cantilever projects from the other end of the member.
In order to reduce the size of the support, the rams are inclined to the axis of the roof-engageable member, one ram being to one side of that axis and the other ram being to the other side of that axis.
Description
iS5~'~
.
I'l\IINEll~ROOF SIJP~OR~ "
l`h:Ls in~rention ~elateæ to m:ine-rooI suppox~t~3 such a~, for ex~lple, those which a~e used to support the roo~s of so-called pack~holes.
~ mine~roof support customarily co~pri~es a floor~
~nga~ing member, a roof-engageable member and hydraulic telescop-ic props by which the roo~-engageable member can be urgea away from the floor~eng~ging member into supporting contact with a roo~.
For some purposes, for example in th~ supporting of pac~holes, the roof-engageable ~ember has two cantile~ers which play a par-~ in ~upporting a roof~
~ .
~: 15 one o~ which can be e~tended from within the member .: outwardly beyond one end of the member b~ a ram hou~ed . ~ithin the member and the other of which can be extended : . from wi-thin the member outwardl~ beyond the other end of the mernber ~y another ram hou~ed within th~ ~ember.
- . . .
In one known fo~m of mine-rooI support, the two cantile~ers and their-actuatj~sr ram~3 are arran~ed line, one a:~e~ the other~ beilg co~ l with ths ms~ r. ~his mean~ th~ the rool '~e~ i~ of ~l~bstanti~1.
25 leng",h, b~3i7C.~ at lea~t equal to the length of the two ~tilevers ana the ~ro rc~n~4 ~ ~ .
II1 a second l,no~n fo.~ of miTle roof ~upport, o~ne "`"'''' ' ~' .
-~6S~7~
oantilever and its actuating ram are located in themember ~ho~ly ~bove the other eantile~er and its actuali:ing ram~ This constru.ction, wh:ile permitting ; . -the length of -the ~llember to be considerably reduced in comp~rison w.ith the first k~o~rn for~, has a member which is considerably deeper than that of the first kno~*n form~ -. In yet a third known form o~ mine-roof suppor-t9 the -` 10 member has a single centrally~loc~ted canti~e~r ~rhich can be exte1ldea Pro~ one end oP the member9 and two cantile~ers whieh can be extended ~rom the other end o~ the member, one being disposed near to one side o~
the member and -the o~her being disposed near to the ~ 15 ~ther si.de sf the member. When all three ca~tile~ers : ~ are in their retracted positionB within the mem~er, the centrally~looated ona lies betwee~ the other t~o.
~his third form o~ mine-roo~ support9 w~ t having the ad~antage o~ a shorter length o~ mem~er and an ~cce~tahle dep.thJ has the di~ad~antage that, at the end fro.~n wnich the two c~ntileYer.~ can be e~tended, : t.here i.s a marke-~ lack v~ streng~h in the outer parts . :
the member.
- 25 X~ rl ob~ec~ of t:his inve~tion to provide an ~ proved mi~e~roo:~ sllppor~
: .
: .
: ~ Accor~ln~ to thi3 in~en~ion a mine-roo~ UppOI'~ has a ~: :
,2 .
roo~`-en~a~;eable member having a ~-;.r~t ccm-tilever mo~a~le Pro~ a housed posi.ti.on ~ithi~ the membc!r to a pvsit.ion projecting from one end vf the member by a fj.r~t r~m which is inelined to the axis o~ the member and is of:Eset -to on~ side o~ the a~is o the member, ancl a æecond can-t~lever movable ~rom a boused position withi~
the member to a position projecting ~rom the other end o* the member by a second ram which is inclined to the axis o~ the member and of*~et to the other side of th~
10 aXi.' 0~ the member, ~he two rams when bo~h cantile~er.s are extended being substantiall~ side-by-side, ons to ~ one side o~ the axiæ of the member and the other to - . the other ~ide o~ the ~xis o~ the member9 and sub--sta~tially parallel the one to the other.
Each cantilever ma~ be sligh~l~ oPf~et ~rom th~ a2i~
oP the member~ one to one side of the axi~ and the other to the other ~qide of the a~ d ~hen ho~lsed in the ~e~ber each cantilever ~ay be ~ightl~ inclinsd to the a~i~ o~ th~ member.
~he angle~ clinatio~ aMd th~ amounts ol o~fsett ng . be such that wnen the two cantilever~ are hou~ed withi~l t~le me~ber3 pa~-t ~t least o~ th~ i~ne~most end-portio~ oP o~e is closely ad~acent to p2rt at l~ast ofth~ innermost end~port~on o~ ~he other. ~hus a mine~
roo~ ~upport in accorda~ce ~ith the i~en-t~on c~ b~ o~
small le~gth arld o~ no mo-~e th~ th~ depth renui~ed to .... . ..
6 ~
~:ive tne neciessary struc-tural support~
In one cons-txuctioll o:~ a mine-roo-f suppor~ part o~ the inne~most e~d-po~Gi.on o~ one ~antilever may be JUSt 5 abiove part o* the innermost end--portion o~ the othe~
can~i.lever. ~his permits the member ~GO be e~en shorter whi].e adaing only slightly to the d~pth o-~ ~he member.
~O In th~ aaconlpanylllc~ drawing~, ~i.jgure 1 i.s 2~n elavatio~al view o:E a mine-roo:~ suppor~
in accordance with one embodi~en~G o~ the ~nven~ion, and :~ . .
Fig~re 2 is a plan view o~ -the mine~roo-~ suppo.r~.
Re~erring to ~he drawings5 the mine roo~
support compri~es a ~loor~engaging member 1, fou~
hydraul:c telescopic prop~ 2 ~onl;~ two being visible) 20 &nd a roo~-engageable member ~c ~he roof-engageablc member La~ ~ firs~ c~nt:ilever 4 which c:a~ be~ moved to ;~ an &~tended position in which it pl~ojects from one end o~ the me~nber 3~ then haYi~g ~ts axis ~lightly of*~et to on~ ~lde o~ the ~xis X ~ X~ a~d a second cantile~e~
~5 5 which ¢~n be mo~ecl to ~n e~tended po~ition in whic~
lt pro~ects ronl the other e~cl o~ the ~e~ber 3, then ~aving its ~s æligh~ly off~e~ to t~e o~he~ ~id~ of ~x~ X ~.
. .
~ " ' .
5'~
.
Xn opcrat:ion o~ the support the f~rst cantilever 4 i~
mo~able from a housed position with.in the mernber to i.ts e~tended position (shown in Figure~ 1 ana 2) by a ram 60 The ram 6 .is inclined at an angle to the a~:Ls ~ X of' the : 5 membar and is o~set to one side o~ that a~isO One end o:~ the ram 6 is Gonnected to the member and 1;he other end is connected to the cantilever 4~
~he second cantilever 5 is movable ~rom a housed position within the member to it~ extended position (sho~n tn ~igures 1 and 2) by a ram 70 ~he ram 7 is inclined at an angle to the axis ~ X arld is o*f.set to ~he other side o~ that a~
:~ One end of th~ ra~ 7 is connec~ed to the mem~er and the other end i5 conneoted to the cantilever 50 When e~tended, as seen in Figure 2, the two rams are ~ubstantially side by~~ide, one to one slde o~ the axis X - ~, bei~g o~set by, s~ay, 50 mm, a~d the other to the other side o~ the a~is X - 2, being o~set by, say~ 60 a~d are sub~tantially paral.lel the one ~o the otherO
'~
When ~o~ractedy ~he t~o c~ltilevers are housed within the member wlth part of the innermo~t end-portion of one : closelg adjacent to a p~rt of the i~ne~mo~ end-portion : 25 o~ the oth~r~ ~o tha~ end, the pivot31 connection o~
each ram to i~ cantilever may be o~-fset ~rom th~ axis ~:~ of the cankile~er, and each canti.lever may be slightly ~nclined ~o the cl~;iS X -- ~ when so hou~ect.
'""''`' '-'''''~ " `
.
.
I'l\IINEll~ROOF SIJP~OR~ "
l`h:Ls in~rention ~elateæ to m:ine-rooI suppox~t~3 such a~, for ex~lple, those which a~e used to support the roo~s of so-called pack~holes.
~ mine~roof support customarily co~pri~es a floor~
~nga~ing member, a roof-engageable member and hydraulic telescop-ic props by which the roo~-engageable member can be urgea away from the floor~eng~ging member into supporting contact with a roo~.
For some purposes, for example in th~ supporting of pac~holes, the roof-engageable ~ember has two cantile~ers which play a par-~ in ~upporting a roof~
~ .
~: 15 one o~ which can be e~tended from within the member .: outwardly beyond one end of the member b~ a ram hou~ed . ~ithin the member and the other of which can be extended : . from wi-thin the member outwardl~ beyond the other end of the mernber ~y another ram hou~ed within th~ ~ember.
- . . .
In one known fo~m of mine-rooI support, the two cantile~ers and their-actuatj~sr ram~3 are arran~ed line, one a:~e~ the other~ beilg co~ l with ths ms~ r. ~his mean~ th~ the rool '~e~ i~ of ~l~bstanti~1.
25 leng",h, b~3i7C.~ at lea~t equal to the length of the two ~tilevers ana the ~ro rc~n~4 ~ ~ .
II1 a second l,no~n fo.~ of miTle roof ~upport, o~ne "`"'''' ' ~' .
-~6S~7~
oantilever and its actuating ram are located in themember ~ho~ly ~bove the other eantile~er and its actuali:ing ram~ This constru.ction, wh:ile permitting ; . -the length of -the ~llember to be considerably reduced in comp~rison w.ith the first k~o~rn for~, has a member which is considerably deeper than that of the first kno~*n form~ -. In yet a third known form o~ mine-roof suppor-t9 the -` 10 member has a single centrally~loc~ted canti~e~r ~rhich can be exte1ldea Pro~ one end oP the member9 and two cantile~ers whieh can be extended ~rom the other end o~ the member, one being disposed near to one side o~
the member and -the o~her being disposed near to the ~ 15 ~ther si.de sf the member. When all three ca~tile~ers : ~ are in their retracted positionB within the mem~er, the centrally~looated ona lies betwee~ the other t~o.
~his third form o~ mine-roo~ support9 w~ t having the ad~antage o~ a shorter length o~ mem~er and an ~cce~tahle dep.thJ has the di~ad~antage that, at the end fro.~n wnich the two c~ntileYer.~ can be e~tended, : t.here i.s a marke-~ lack v~ streng~h in the outer parts . :
the member.
- 25 X~ rl ob~ec~ of t:his inve~tion to provide an ~ proved mi~e~roo:~ sllppor~
: .
: .
: ~ Accor~ln~ to thi3 in~en~ion a mine-roo~ UppOI'~ has a ~: :
,2 .
roo~`-en~a~;eable member having a ~-;.r~t ccm-tilever mo~a~le Pro~ a housed posi.ti.on ~ithi~ the membc!r to a pvsit.ion projecting from one end vf the member by a fj.r~t r~m which is inelined to the axis o~ the member and is of:Eset -to on~ side o~ the a~is o the member, ancl a æecond can-t~lever movable ~rom a boused position withi~
the member to a position projecting ~rom the other end o* the member by a second ram which is inclined to the axis o~ the member and of*~et to the other side of th~
10 aXi.' 0~ the member, ~he two rams when bo~h cantile~er.s are extended being substantiall~ side-by-side, ons to ~ one side o~ the axiæ of the member and the other to - . the other ~ide o~ the ~xis o~ the member9 and sub--sta~tially parallel the one to the other.
Each cantilever ma~ be sligh~l~ oPf~et ~rom th~ a2i~
oP the member~ one to one side of the axi~ and the other to the other ~qide of the a~ d ~hen ho~lsed in the ~e~ber each cantilever ~ay be ~ightl~ inclinsd to the a~i~ o~ th~ member.
~he angle~ clinatio~ aMd th~ amounts ol o~fsett ng . be such that wnen the two cantilever~ are hou~ed withi~l t~le me~ber3 pa~-t ~t least o~ th~ i~ne~most end-portio~ oP o~e is closely ad~acent to p2rt at l~ast ofth~ innermost end~port~on o~ ~he other. ~hus a mine~
roo~ ~upport in accorda~ce ~ith the i~en-t~on c~ b~ o~
small le~gth arld o~ no mo-~e th~ th~ depth renui~ed to .... . ..
6 ~
~:ive tne neciessary struc-tural support~
In one cons-txuctioll o:~ a mine-roo-f suppor~ part o~ the inne~most e~d-po~Gi.on o~ one ~antilever may be JUSt 5 abiove part o* the innermost end--portion o~ the othe~
can~i.lever. ~his permits the member ~GO be e~en shorter whi].e adaing only slightly to the d~pth o-~ ~he member.
~O In th~ aaconlpanylllc~ drawing~, ~i.jgure 1 i.s 2~n elavatio~al view o:E a mine-roo:~ suppor~
in accordance with one embodi~en~G o~ the ~nven~ion, and :~ . .
Fig~re 2 is a plan view o~ -the mine~roo-~ suppo.r~.
Re~erring to ~he drawings5 the mine roo~
support compri~es a ~loor~engaging member 1, fou~
hydraul:c telescopic prop~ 2 ~onl;~ two being visible) 20 &nd a roo~-engageable member ~c ~he roof-engageablc member La~ ~ firs~ c~nt:ilever 4 which c:a~ be~ moved to ;~ an &~tended position in which it pl~ojects from one end o~ the me~nber 3~ then haYi~g ~ts axis ~lightly of*~et to on~ ~lde o~ the ~xis X ~ X~ a~d a second cantile~e~
~5 5 which ¢~n be mo~ecl to ~n e~tended po~ition in whic~
lt pro~ects ronl the other e~cl o~ the ~e~ber 3, then ~aving its ~s æligh~ly off~e~ to t~e o~he~ ~id~ of ~x~ X ~.
. .
~ " ' .
5'~
.
Xn opcrat:ion o~ the support the f~rst cantilever 4 i~
mo~able from a housed position with.in the mernber to i.ts e~tended position (shown in Figure~ 1 ana 2) by a ram 60 The ram 6 .is inclined at an angle to the a~:Ls ~ X of' the : 5 membar and is o~set to one side o~ that a~isO One end o:~ the ram 6 is Gonnected to the member and 1;he other end is connected to the cantilever 4~
~he second cantilever 5 is movable ~rom a housed position within the member to it~ extended position (sho~n tn ~igures 1 and 2) by a ram 70 ~he ram 7 is inclined at an angle to the axis ~ X arld is o*f.set to ~he other side o~ that a~
:~ One end of th~ ra~ 7 is connec~ed to the mem~er and the other end i5 conneoted to the cantilever 50 When e~tended, as seen in Figure 2, the two rams are ~ubstantially side by~~ide, one to one slde o~ the axis X - ~, bei~g o~set by, s~ay, 50 mm, a~d the other to the other side o~ the a~is X - 2, being o~set by, say~ 60 a~d are sub~tantially paral.lel the one ~o the otherO
'~
When ~o~ractedy ~he t~o c~ltilevers are housed within the member wlth part of the innermo~t end-portion of one : closelg adjacent to a p~rt of the i~ne~mo~ end-portion : 25 o~ the oth~r~ ~o tha~ end, the pivot31 connection o~
each ram to i~ cantilever may be o~-fset ~rom th~ axis ~:~ of the cankile~er, and each canti.lever may be slightly ~nclined ~o the cl~;iS X -- ~ when so hou~ect.
'""''`' '-'''''~ " `
.
Claims (4)
1. A mine-roof support the roof-engageable member of which has (i) a first cantilever movable between a housed position, substantially within the member, and an extended position projecting from one end of the member, (ii) a first ram for moving the first cantilever, which ram is inclined to the axis of the member and is offset to one side of that axis, (iii) a second cantilever, movable between a housed position, substantially within the member, and an extended position projecting from the other end of the member, and (iv) a second ram for moving the second cantilever, which ram is inclined to the axis of the member and is offset to the other side of at axis, (v) the two rams 3 when both cantilevers are in their extended positions, being (a) substantially side-by-side, one to one side of the axis of the member and the other to the other side of the axis of that member and (b) substantially parallel the one to the other, and (vi) each cantilever, in its housed position, (a) being alongside part of the ram which moves the other cantilever and (b) having part at least of its inner-most end-portion closely adjacent part at least of the innermost end-portion of the other cantilever.
2. A mine-roof support as claimed in Claim 1 wherein each cantilever is offset from the axis of the member, one to one side of that axis and the other to the other side of that axis.
3. A mine-roof support as claimed in Claim 1 wherein a ram is connected to the cantilever which it moves by a pivotal connection which is offset from the axis of the cantilever.
4. A mine-roof support as claimed in any of the preceding claims wherein a cantilever is inclined to the axis of the member when in its housed position.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8124219 | 1981-08-07 | ||
| GB08124219A GB2103693B (en) | 1981-08-07 | 1981-08-07 | Mine-roof supports |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1165572A true CA1165572A (en) | 1984-04-17 |
Family
ID=10523784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000407538A Expired CA1165572A (en) | 1981-08-07 | 1982-07-19 | Mine-roof supports |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1165572A (en) |
| GB (1) | GB2103693B (en) |
-
1981
- 1981-08-07 GB GB08124219A patent/GB2103693B/en not_active Expired
-
1982
- 1982-07-19 CA CA000407538A patent/CA1165572A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2103693B (en) | 1984-09-05 |
| GB2103693A (en) | 1983-02-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |