AU736955B2 - A sub-level caving hydraulic support with a low-positioned door for passing caved coal - Google Patents
A sub-level caving hydraulic support with a low-positioned door for passing caved coal Download PDFInfo
- Publication number
- AU736955B2 AU736955B2 AU27673/00A AU2767300A AU736955B2 AU 736955 B2 AU736955 B2 AU 736955B2 AU 27673/00 A AU27673/00 A AU 27673/00A AU 2767300 A AU2767300 A AU 2767300A AU 736955 B2 AU736955 B2 AU 736955B2
- Authority
- AU
- Australia
- Prior art keywords
- canopy
- base
- support
- sub
- hydraulic support
- 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
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
- Jib Cranes (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Description
Our Ref:7465497 P/00/011 Regulation 3:2
AUSTRALIA
Patents Act 1990
ORIGINAL
COMPLETE SPECIFICATION STANDARD PATENT .0.0 .:O*o .0.0 0*00 0 0.
0.0.
0 00000 IP Australia vi Documents received on: ca B 1 1 APR 2100 8&tch No: I r Applicant(s): Address for Service: Yankuang (iroup Corporation No. 40 Fushan Road Zoucheng City Shandong 273500 People's Republic of China DAVIES COLLISON CAVE Patent Trade Mark Attorneys Level 10, 10 Barrack Street SYDNEY NSW 2000 Invention Title: A sub-level caving hydraulic support with a low-positioned door for passing caved coal The following statement is a full description of this invention, including the best method of performing it known to me:- 5020 A SUB-LEVEL CAVING HYDRAULIC SUPPORT WITH A LOW- POSITIONED DOOR FOR PASSING CAVED COAL The present invention relates to a sub-level caving hydraulic support with a low-positioned door for passing caved coal, which is especially suitable for mining a coal seam over 5m with a good capability of a top coal, i.e. for the working face at which the immediate roof is caved immediately following the face advance.
To keep an enough space for caving coal at a rear portion of a support, two types of structures are generally selected and used for the sub-level caving hydraulic supports with a low-positioned door for passing caved coal.
The sub-level caving hydraulic support with a low-positioned door for *.."passing caved coal and a reverse four bar linkage occupies too much passage space, and is difficultly to be operated so that it can not satisfy requirements Sof high-efficiency and high-output at a coal face. When the sub-level caving hydraulic support is equipped a normal four bar linkage with the Y-shape front bar, the front bar is loaded up unreasonably and its strength is lowered because only one hinge point is provided between the front bar and the base of the support. Because of the lower connection strength between the base and the front bar, the stability and the forsional strength of the support are 1 P:\WPDOCSXDYS\spccic\7465497spe.doc-19 June 2001 -2lower so that the failure rate thereof is higher. Therefore, the lower reliability of the support restricts to increase the output of the face and hinders the normal operation.
According to one aspect of the present invention there is provided a sub-level caving hydraulic support including a base and a canopy each having a forward end portion and a rearward end portion, forward and rearward pairs of hydraulic legs operatively interconnecting the base and the canopy, said forward legs being laterally spaced apart from one another and disposed towards the forward end portions of said base and canopy and said rearward legs being laterally spaced apart and disposed towards the rearward end portions of the base and canopy; a debris shield pivotally connected to the rearward end portion of the canopy, a tail canopy pivotally connected to the debris shield a retractable plate operatively connected to the tail canopy for movement relative thereto between an extended position and a retracted position, a drive cylinder for causing said movement of said retractable plate, front and rear bar link means pivotally connected to the rearward end portion of the base and the debris shield, said front bar link means including two bars each disposed behind a respective one of said rearwards legs.
S: Preferably, the base has a bottom surface and the rear bar means is a single bar pivotally mounted to the base at a pivot point, the height from the pivot point to the bottom surface of the support is in a range of 750mm to 950mm.
R Preferably, the upper surface of the canopy makes an angle of a 300 400 with the debris shield at working positions. The height B for passing caved coal from the tail P:\WPDOCS\DYSspecic\7465497spc.doc-19 Jun 2001 -3canopy to the bottom surface of the base is 1000mm to 1200mm.
As compared with the prior art, remarkable advantages of the present invention are as follows: As compared with the hydraulic supports with the reverse forbear linkage, a proper position and sufficient space for passing workers are provided by the present support since the front bars are positioned behind the rear legs. This facilitates operation of miners. As compared with the sub-level caving hydraulic support with a low-positioned door for passing caved coal and the normal lemniscate linkage in which the front lemniscate bars are shaped in Y-shape, two bars can be used as the front bars according to the design of the present invention so as to greatly improve load conditions of the support and to enhance strength and reliability of the support.
To keep an enough space for passing caved coal at the rear portion of the support, the height A from the pivot point of the rear lemniscate bar (a single rear bar) on the base to the bottom surface of the base is preferably selected within a range of 750mm to S: 950mm. In the operation positions, a inclination angle a between the upper surface of the canopy and the debris shield should be 300 400. The height B for passing caved coal from the tail canopy to the bottom surface of the base is about 1000mm to 1200mm.
Because of the selections to the above parameters and the structure according to the P RAN present invention, an enough space for passing caved coal are kept in the support and the capacities against the deflection load as well as the horizontal force are increased. The P.\WPDOCS\DYS\.spcie\7465497spc.doc-19 Jm 2001 -4stability, strength and reliability of the support are, therefore, greatly enhanced. All the advantages maintain a long operating time and provide a possibility to be continuously operated so that it is possible to obtain a high output with high efficiency and to decrease the maintenance cost as well as the production cost.
The description of attached figures of a preferred embodiment of the present invention are as follows: FIG 1. is a schematic drawing showing the whole structure of the present invention; FIG. 2 is a vertical view showing A-A section in FIG. 1.
•The present invention will be explained as accompanying the figures in details.
oo *o with a forepole. The base 2 and the canopy 3 are connected together by legs 1 at its two end respectively. The rear end of the canopy 3 is pivoted to a debris shield 4. The debris shield 4 is pivoted to a tail canopy 6 equipped with a retractable plate 5. Tail canopy cylinder 9 for actuating a canopy 6 is connected with the debris shield 4 and the tail canopy 6. The retractable plate is moved by the tail canopy cylinder 9 as well as a cylinder 10, which is disposed in the tail canopy, to break big pieces and to adjust the opening of **"the coal door for passing caved coal. The front and rear bars are positioned between the rear portion of the base 2 and the debris shield 4. The front bar 7 is arranged behind the rear legs of the support. According to this structure, the front bar 7 can be designed as double-bars (as shown is Fig.2) so as to improve the load condition of the support and to enhance the strength and reliability of the support.
In order to form an enough space for passing caved coal and to facilitate o the operation and the maintenance at the rear portion of the support, the rear bar can be designed as a single bar 8. The cross-section of the bar 8 is larger than that of the front bar 7 to meet the requirement of the strength of the support. The height A from the pivot point of the rear bar 8 on the base 2 to the bottom surface of the support is in a range of 750mm to 950mm at the working positions (the height of the support is from 2.8m to 3.2m generally), the inclination angle a between the upper surface of the canopy 3 and the caving shield 4 is preferably in a range of 300 to 40 and the height B for passing caved coal from the tail canopy 6 to the bottom surface of the support ranges from 1000mm to 1200mm.
ZFS6200/18/35 Type Sub-level Caving Hydraulic Support with A lowpositioned door for passing caved coal made on the basis of aforesaid design concept, in which height A from the pivot point of the rear bar on the base to bottom surface of the support is 800mm; the height of the support is 3m, a 34.6 ,B 1155mm.The test for the specimen of the support carried out by the national test and check center has proved that the rear space of the support is larger; whole structure of the support is reasonable; the anti deflection load capability of the support is stronger; the support has passed the test of operating life of 30000 operation cycles (the national standard of operating life is 7000 operation cycles). The support has been tested "underground at Xinglongzhuang Coal MIine, Yanzhou Mining (Group) Company. The coal seam at the testing coal face averages 8.2m. On the basis of the requirement about ventilation at the coal face, operators passage, roof control, reasonable ratio of mined coal to caved coal, as well as the requirement of high efficiency and high output, 3m height of sheerer mining is selected. The ratio of mined coal to caved coal is 1:1.75.When a sub-level 6 caving mining system is used to mine super thick seam, the support can be used to achieve slicing mining and caving, which ratio of caved coal to caving coal must be controlled in the range of 1:1.2.
An industrial underground test of the support of the present invention has been carried out from April to June, 1999.The test coal face advanced 634.75m,producing coal of 1066104 ton over 3 months by June 30 t h 1999.Output was 400368 ton in June, 1999. Maximum coal output per day was 20169 ton; average production efficiency achieved 177.981 ton/man at coalface; no damage of the support occurred, so the support has been ratified because the high reliability of the support satisfies the requirement of the user. We believe that the support of the present invention can be used for reference in designing sub-level caving hydraulic support in the future.
Throughout this specification and the claims which follow, unless the context requires otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.
Claims (4)
1. A sub-level caving hydraulic support including a base and a canopy each having a forward end portion and a rearward end portion, forward and rearward pairs of hydraulic legs operatively interconnecting the base and the canopy, said forward legs being laterally spaced apart from one another and disposed towards the forward end portions of said base and canopy and said rearward legs being laterally spaced apart and disposed towards the rearward end portions of the base and canopy; a debris shield pivotally connected to the rearward end portion of the canopy, a tail canopy pivotally connected to the debris shield a retractable plate operatively connected to the tail canopy for movement relative thereto between an extended position and a retracted position, a drive cylinder for causing said movement of said retractable plate, front and rear bar link means pivotally connected to the rearward end portion of the base and the debris shield, said front bar link means including two bars each disposed behind a respective one of said rearwards legs.
S2. A sub-level caving hydraulic support as defined in claim 1 wherein said base has a bottom surface and rear bar means is a single bar pivotally mounted to the base at a pivot o point, the height from the pivot point to the bottom surface of the support is in a range of 2 0750mm to 950mm.
3. A sub-level caving hydraulic support according to claim 1 or claim 2, wherein the inclination of the canopy has an upper surface which is inclined to the debris shield at an :angle from 300 to 400; the height for passing caved coal from the rear end of the tail canopy .to the bottom surface of the support is from 1000mm to 1200mm. 25
4. A sub-level caving hydraulic support substantially as hereinbefore described with reference to the accompanying drawings. Dated this 19 th day of June, 2001 YANKUANG GROUP CORPORATION RA By Its Patent Attorneys DAVIES COLLISON CAVE
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN99112531 | 1999-11-10 | ||
CN99112531A CN1087807C (en) | 1999-11-10 | 1999-11-10 | Hydraulic prop frame for low position blasting down the roof coal |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2767300A AU2767300A (en) | 2001-05-17 |
AU736955B2 true AU736955B2 (en) | 2001-08-09 |
Family
ID=5275829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU27673/00A Expired AU736955B2 (en) | 1999-11-10 | 2000-04-11 | A sub-level caving hydraulic support with a low-positioned door for passing caved coal |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN1087807C (en) |
AU (1) | AU736955B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102926779A (en) * | 2012-11-16 | 2013-02-13 | 无锡阳工机械制造有限公司 | Hydraulic shielding bracket structure for coal face |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100359132C (en) * | 2003-03-05 | 2008-01-02 | 兖矿集团有限公司 | Hydraulic coal mine support for low-position roof blasting-down |
AU2010271330B2 (en) | 2009-07-10 | 2014-09-11 | Joy Global Underground Mining Llc | Longwall mining roof supports |
CN102926778A (en) * | 2012-11-16 | 2013-02-13 | 无锡阳工机械制造有限公司 | Shielding beam structure of hydraulic bracket |
CN108412530B (en) * | 2018-02-05 | 2024-01-30 | 阳泉煤业(集团)有限责任公司 | H-shaped caving coal support upright post pressing plate fixing and moving method |
CN110145352A (en) * | 2019-06-28 | 2019-08-20 | 山西平阳煤机装备有限责任公司 | Hydraulic support column limiting device |
CN110500128A (en) * | 2019-09-27 | 2019-11-26 | 中煤北京煤矿机械有限责任公司 | A kind of hydraulic support with six bar mechanism |
CN112796801B (en) * | 2021-01-27 | 2022-11-29 | 六盘水师范学院 | Fully mechanized coal mining support capable of monitoring coal caving range |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2074228A (en) * | 1980-04-22 | 1981-10-28 | Henderson Group Ltd Pc | Door operating mechanism |
GB2075584A (en) * | 1980-05-06 | 1981-11-18 | Banyaszati Fejlesztesi Intezet | Mining apparatus |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2095936U (en) * | 1991-08-03 | 1992-02-12 | 朱旭 | Mechanical hydraulic support for top coal releasing |
CN2170373Y (en) * | 1993-07-31 | 1994-06-29 | 王永胜 | Swinging tail beam type hydraulic support for blasting down roof of coal mine |
CN2213848Y (en) * | 1994-11-21 | 1995-11-29 | 郑州煤矿机械厂 | Low-position caving hydraulic support for coal mine |
CN2240607Y (en) * | 1995-11-16 | 1996-11-20 | 沈阳煤炭科学研究所 | hydraulic prop for blasting down the roof coal |
-
1999
- 1999-11-10 CN CN99112531A patent/CN1087807C/en not_active Expired - Lifetime
-
2000
- 2000-04-11 AU AU27673/00A patent/AU736955B2/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2074228A (en) * | 1980-04-22 | 1981-10-28 | Henderson Group Ltd Pc | Door operating mechanism |
GB2075584A (en) * | 1980-05-06 | 1981-11-18 | Banyaszati Fejlesztesi Intezet | Mining apparatus |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102926779A (en) * | 2012-11-16 | 2013-02-13 | 无锡阳工机械制造有限公司 | Hydraulic shielding bracket structure for coal face |
Also Published As
Publication number | Publication date |
---|---|
CN1087807C (en) | 2002-07-17 |
CN1296116A (en) | 2001-05-23 |
AU2767300A (en) | 2001-05-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2005227376B2 (en) | Hydraulic support for fully mechanized mining and caving face end | |
CN101666230B (en) | Coal mining method of lengthened front-beam fully-mechanized mining and fully-mechanized top coal carving of three-soft coal seam and equipment | |
AU736955B2 (en) | A sub-level caving hydraulic support with a low-positioned door for passing caved coal | |
AU2003271396B2 (en) | A sub-level caving hydraulic support | |
WO2010066180A1 (en) | Filling and supporting hudraulic support with tamping mechanism | |
CN2466351Y (en) | Full-shield powered support of high-, middle- and low-level caving coal | |
CN110748364B (en) | Caving coal hydraulic support breaker | |
CN101105136A (en) | Four column protected type hydraulic prop frame for low position blasting down the roof coal | |
CN1821545B (en) | Attachment support of mining device | |
CN2240607Y (en) | hydraulic prop for blasting down the roof coal | |
CN207879367U (en) | Hydraulic support receives device for coal and coal mining system | |
US5104267A (en) | Roof supports for a mining installation | |
CN213116362U (en) | Steep roadside hydraulic support group | |
CN210622725U (en) | Four-connecting-rod lifting all-dimensional rotating device | |
CN2226642Y (en) | Net type hydraulic step-by-step support | |
US4121426A (en) | Mine roof support unit and assembly | |
CN2163232Y (en) | High steady low position hydraulic prop | |
US4094422A (en) | Bucket loader boom | |
CN2228131Y (en) | Connecting component of segmented chock cap for coal face | |
CN2182880Y (en) | Means for supporting and keeping gallery | |
CN113062748B (en) | Forward moving device of roof bolting machine for tunneling and bolting machine | |
CN208473913U (en) | The big side plate caving shield separate structure of hydraulic support | |
CN2203358Y (en) | High-level caving coal hydraulic prop | |
US4252477A (en) | Mine roof support | |
CN220929442U (en) | Hydraulic support for filling paste in thin coal seam |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FGA | Letters patent sealed or granted (standard patent) | ||
MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |