CA1091460A - Gallery walking lining - Google Patents
Gallery walking liningInfo
- Publication number
- CA1091460A CA1091460A CA324,031A CA324031A CA1091460A CA 1091460 A CA1091460 A CA 1091460A CA 324031 A CA324031 A CA 324031A CA 1091460 A CA1091460 A CA 1091460A
- Authority
- CA
- Canada
- Prior art keywords
- arch
- segments
- arch segments
- lining
- rail
- 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
- 229910052729 chemical element Inorganic materials 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000011435 rock Substances 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
- E21D23/0086—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
-
- 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
- E21D23/08—Advancing mechanisms
- E21D23/081—Advancing mechanisms forming parts of the roof supports
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)
- Escalators And Moving Walkways (AREA)
- Lining And Supports For Tunnels (AREA)
- Bridges Or Land Bridges (AREA)
- Tents Or Canopies (AREA)
- Road Paving Machines (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The gallery walking lining consists of arch segments connected in alternate pairs by means of tie rods disposed near to the floor. Each arch segment is composed of two arch elements connected at a crown and terminating in supporting hydraulic cylinders. In the arch segment there are slidably mounted roof-support elements connected to hydraulic cylinders.
Extending of the supporting hydraulic cylinders causes a preliminary spragging of the arch segment in the heading. Final spragging is effected by means of the hydraulic cylinders which press the roof-support elements to the surface of the heading. Displacing of the arch segment is performed after withdrawing it by suspending on a rail carried in adjacent spragged arch segments. The displacing of the withdrawn arch segment on the rail is facilitated by means of runners.
The gallery walking lining consists of arch segments connected in alternate pairs by means of tie rods disposed near to the floor. Each arch segment is composed of two arch elements connected at a crown and terminating in supporting hydraulic cylinders. In the arch segment there are slidably mounted roof-support elements connected to hydraulic cylinders.
Extending of the supporting hydraulic cylinders causes a preliminary spragging of the arch segment in the heading. Final spragging is effected by means of the hydraulic cylinders which press the roof-support elements to the surface of the heading. Displacing of the arch segment is performed after withdrawing it by suspending on a rail carried in adjacent spragged arch segments. The displacing of the withdrawn arch segment on the rail is facilitated by means of runners.
Description
10~14~;0 This invention relates to a walking lining for a gallery consist-ing of arch segments and supporting hydraulic cylinders, and spragging hydraulic cylinders operating in the plane of the arch element.
me gallery walling lining known from the United States Patent Specification No. 3,863,793 consists of arch segments and spragging elements and comprises hydraulic cy~;nders for spragging the lining in the plane of the arch element. me known lining has in its middle part a roof arch element and side roof arches articulated to the middle arch. To extend the side roof arch elements the lining is provided with telescopic elements spragging the linings of the heading, and supported against the floor. At the end of the telescopic spragging element, where it is connected with the side roof arch element, a pivoted block is fastened fitted slidably along the inner surface of the side roof arch element. To the other side of the block is pivoted a hydraulic cylinder the opposite end o which is pivoted to the middle roof arch element. me segment of the known lining is designed symmetrically in relation to the vertical plane passing through the crown of the middle roof arch element.
A disadvantage of the known lining is that it has no capacity for walking. mus to displace it a truck must be used, which hinders continuous work in the gallery for larger heading machines. It is not possible to employ facing when that lining is used, since it is suitable only for cohesive rocks. Moreover, the known lining has the disadvantage that for a given size, it can be used only with a heading of a predetermined cross-section.
me object of the invention is an arch-type walking lining for a gallery capable of walking without additional devicesO Preferably a given size of lining can be used for a range of sizes of galleries. The lining should have a clearance enabling co-operation with mining machines having 1(~919~60 the dimensions approximating to transverse dimensions of the heading. More-over, the lining should be able to work in curved galleries.
The invention provides a walking lining for a mine gallery, said lining comprising: (a) a plurality of arch segments each having an arched profile and having two legs each supported on a foot through a vertically acting first hydraulic cylinder means, said legs converging in the upwards direction to meet at their upper ends in a crown; (b) a roof support element associated with the upper part each said leg, a corresponding spragging cylinder having an upper end connected to the roof support element and a lower end connected to the leg, said spragging cylinder being operable to move the roof support element between an extended and a retracted posi-tion; (c) a rail structure extending longitudinally of the lining in the region of the crown thereof, said rail structure having a length spanning a series of said arch segments; (d) a first set of alternate arch segments being rigidly attac~ed to said rail structure; (e) a second set of arch segments interspaced by said first set and having bearing means operative to provide a sliding bearing connection with the rail upon relative vertical movement between the rail and the corresponding arch segment; (f) longi-tudinally extending strap means interconnecting said first set of arch segments in pairs and interconnecting said second set of arch segments in pairs; and (g) longitudinally extending second hydraulic cylinder means forming a connection between two adjacent arch segments; whereby upon retracting the first hydraulic cylinder means of one set of arch segments said bearing connection is established between said second set of arch segments and said rail, so that said sets can be moved longitudinally relative to each other through actuation of said second hydraulic cylinder means.
Preferably, each arch element has near to its crown a part of _ 2 -1091~60 inclined bearing surfaces which provide abutments for the roof support ele-ments when retractedO
The invention will be now described in particular with reference to the exemplary embodiment shown in the accompanying drawings, wherein:
Figure 1 is a view of a segment of the lining according to the invention;
Figure 2 is a vertical cross-sectional through several lining sections;
Figure 3 shows an auxiliary jack for mounting the arches of a fixed lining;
Figure 4 is the sectional view of the foot of supporting hydraulic cylinder;
Figure 5 shows the arch expander of the arch segment; and Figure 6 is the sectional view taken on the line A-A of Figure 1.
me lining consists of four types of arch segments I, II~ III
and IV, (see Figure 2) differing from each other with plates 11, 12~ 13 and 14. In the plates 11, 13 and 14 pins 19 are mounted to fasten the double-tee beam 9 to the arch element of the lining~ whereas in the plate 12 runners 7 are provided. Each arch segment I, II~ III, and IV consists of two arch elements 1 detachably connected by means of joint 18, the size of the elements depending on the dimensions of the gallery cross-sectionO
The arch element 1 in cross-section is of U-form with a recess 22 wherein the roof-support element 6 is situatedO me spragging hydraulic cylinder
me gallery walling lining known from the United States Patent Specification No. 3,863,793 consists of arch segments and spragging elements and comprises hydraulic cy~;nders for spragging the lining in the plane of the arch element. me known lining has in its middle part a roof arch element and side roof arches articulated to the middle arch. To extend the side roof arch elements the lining is provided with telescopic elements spragging the linings of the heading, and supported against the floor. At the end of the telescopic spragging element, where it is connected with the side roof arch element, a pivoted block is fastened fitted slidably along the inner surface of the side roof arch element. To the other side of the block is pivoted a hydraulic cylinder the opposite end o which is pivoted to the middle roof arch element. me segment of the known lining is designed symmetrically in relation to the vertical plane passing through the crown of the middle roof arch element.
A disadvantage of the known lining is that it has no capacity for walking. mus to displace it a truck must be used, which hinders continuous work in the gallery for larger heading machines. It is not possible to employ facing when that lining is used, since it is suitable only for cohesive rocks. Moreover, the known lining has the disadvantage that for a given size, it can be used only with a heading of a predetermined cross-section.
me object of the invention is an arch-type walking lining for a gallery capable of walking without additional devicesO Preferably a given size of lining can be used for a range of sizes of galleries. The lining should have a clearance enabling co-operation with mining machines having 1(~919~60 the dimensions approximating to transverse dimensions of the heading. More-over, the lining should be able to work in curved galleries.
The invention provides a walking lining for a mine gallery, said lining comprising: (a) a plurality of arch segments each having an arched profile and having two legs each supported on a foot through a vertically acting first hydraulic cylinder means, said legs converging in the upwards direction to meet at their upper ends in a crown; (b) a roof support element associated with the upper part each said leg, a corresponding spragging cylinder having an upper end connected to the roof support element and a lower end connected to the leg, said spragging cylinder being operable to move the roof support element between an extended and a retracted posi-tion; (c) a rail structure extending longitudinally of the lining in the region of the crown thereof, said rail structure having a length spanning a series of said arch segments; (d) a first set of alternate arch segments being rigidly attac~ed to said rail structure; (e) a second set of arch segments interspaced by said first set and having bearing means operative to provide a sliding bearing connection with the rail upon relative vertical movement between the rail and the corresponding arch segment; (f) longi-tudinally extending strap means interconnecting said first set of arch segments in pairs and interconnecting said second set of arch segments in pairs; and (g) longitudinally extending second hydraulic cylinder means forming a connection between two adjacent arch segments; whereby upon retracting the first hydraulic cylinder means of one set of arch segments said bearing connection is established between said second set of arch segments and said rail, so that said sets can be moved longitudinally relative to each other through actuation of said second hydraulic cylinder means.
Preferably, each arch element has near to its crown a part of _ 2 -1091~60 inclined bearing surfaces which provide abutments for the roof support ele-ments when retractedO
The invention will be now described in particular with reference to the exemplary embodiment shown in the accompanying drawings, wherein:
Figure 1 is a view of a segment of the lining according to the invention;
Figure 2 is a vertical cross-sectional through several lining sections;
Figure 3 shows an auxiliary jack for mounting the arches of a fixed lining;
Figure 4 is the sectional view of the foot of supporting hydraulic cylinder;
Figure 5 shows the arch expander of the arch segment; and Figure 6 is the sectional view taken on the line A-A of Figure 1.
me lining consists of four types of arch segments I, II~ III
and IV, (see Figure 2) differing from each other with plates 11, 12~ 13 and 14. In the plates 11, 13 and 14 pins 19 are mounted to fasten the double-tee beam 9 to the arch element of the lining~ whereas in the plate 12 runners 7 are provided. Each arch segment I, II~ III, and IV consists of two arch elements 1 detachably connected by means of joint 18, the size of the elements depending on the dimensions of the gallery cross-sectionO
The arch element 1 in cross-section is of U-form with a recess 22 wherein the roof-support element 6 is situatedO me spragging hydraulic cylinder
2 is fitted to the roof-support element 6, its other end being connected to the arch element 1. me arch element 1 is connected to a supporting hydraulic cylinder 4 terminating in a foot 17 having dimensions depending on the size of the arch element~
~09i~60 me arch segment I is connected with the arch segment III by means ~f straps 8 constituting articulated tie rods. In a similar way the arch segments II are connected, as are arch segments III and IV. The straps 8 are flexible in the horizontal plane which makes it possible to accommodate curvature of the gallery. Flexibility in vertical plane is pro-vided by horizontal pivots or articulated joints 24.
me arch elements 1 of the arch segment II, are provided at the joint 18 with plates 12 having runners 7. me arch segments I, III and IV
are provided with plates 11, 13 and 14~ respectively, fitted to the arch elements 1, which have grooves to provide guiding for the pins 19 fastening the rails 90 The length of the rails 9 equals the distance between the arch segments I and III. Between the arch segments are articulated liners 5 disposed on the periphery around the arch segment at a pitch "t".
me liner elements 5 consist of two flat parts telescopically interconnected. Between the arch segments I and II are arranged two hydraulic cylinders 10 operative to displace the l;n;ng~ On the arch segment IV is fitted a trian~e of bars 15, having a pivoted gripper 21, the bars 15 being adapted to locate elements of the fixed lining thereon.
me triangle 15 is lifted under the roo~ by means of hydraulic cylinder 16 (Figure 2) acting through a cable 20. me cable 20 is wrapped around a pulley 25 mounted on the plate 14.
To displace the lining towards the front, the arch segments II
are retracted by means of cylinders 2 and 4. mus the arch elements I
interconnected at the joint 18 are lowered until the upper runner 7 comes into contact with the rail 90 men~ supplying pressure to the working spaces of the two hydraulic cylinders 10 causes displacement of the arch segments II towards the gate end, whereby the upper runner 7 travels over _ 4 --~ .
rail 9. Simultaneously, the liner element 5 come together telescopically.
After displacing the arch segments II the supporting hydraulic cylinders 4 are spragged, causing lifting of the arch elements 1, whereafter the sprag-ging hydraulic cylinders 2 are spragged, causes the roof-support elements 6 to be pressed against the roof. &bsequent operation withdraws the arch segments I, III and IV by means of hydraulic cylinders 2 and 4, so that the arch segments I, III and IY are suspended on the rail 9. Then, supplying pressure into the working spaces of the pistons of the hytraulic cylinders 10, displaces the arch segments I, III and IV, interconnected with tie rods 8.
Simultaneously, the liner elements 5 is extended. In turn, the supporting hydraulic cylinders 4 are spragged, lifting the arch elements 1, and then the spragging hydraulic cylinders 2 are spragged resulting in pressing the elements 6 to the roof, the supporting capacity of the lining ; thus being realized.
After displacing the walking lining along the heading the fixed lining is installed by means of the device provided on the last arch element of the walking lining. This is done b~ operation of the hydraulic cylinders 16 through the cable 20, lifting the triangle 15 at the end of which the gripper 21 is pivoted, the arch element of the fixed lining being installed on tbe triangle 15. After lifting the arch of the roof lining, the arch ele-ments of the roadside are added, and the arch elements are joined together with known screw joints.
Deflection of the gallery in the vertical direction is automatic-ally overcome by the lining by utilization of the grooved guides in plates 11, 13 and 14, the pins 19 fixing the rails 9, and of the spacing between the runners 7. Deflection of the heading or gallery to left or to right is accom-modated by actuation of the spragging hydraulic cylinder 2 from the lef~-hand or right-hand side, respectively. The roof-support el _ent 6 ~nks -- ~U914~0 and sprags the arch elements in the heading in the way described aboveO
Where the walking lining is used in curved cross headings instead of tie rods 8 hydraulic cylinders are installed, having l~ngths suited to the radius of the arch element.
~09i~60 me arch segment I is connected with the arch segment III by means ~f straps 8 constituting articulated tie rods. In a similar way the arch segments II are connected, as are arch segments III and IV. The straps 8 are flexible in the horizontal plane which makes it possible to accommodate curvature of the gallery. Flexibility in vertical plane is pro-vided by horizontal pivots or articulated joints 24.
me arch elements 1 of the arch segment II, are provided at the joint 18 with plates 12 having runners 7. me arch segments I, III and IV
are provided with plates 11, 13 and 14~ respectively, fitted to the arch elements 1, which have grooves to provide guiding for the pins 19 fastening the rails 90 The length of the rails 9 equals the distance between the arch segments I and III. Between the arch segments are articulated liners 5 disposed on the periphery around the arch segment at a pitch "t".
me liner elements 5 consist of two flat parts telescopically interconnected. Between the arch segments I and II are arranged two hydraulic cylinders 10 operative to displace the l;n;ng~ On the arch segment IV is fitted a trian~e of bars 15, having a pivoted gripper 21, the bars 15 being adapted to locate elements of the fixed lining thereon.
me triangle 15 is lifted under the roo~ by means of hydraulic cylinder 16 (Figure 2) acting through a cable 20. me cable 20 is wrapped around a pulley 25 mounted on the plate 14.
To displace the lining towards the front, the arch segments II
are retracted by means of cylinders 2 and 4. mus the arch elements I
interconnected at the joint 18 are lowered until the upper runner 7 comes into contact with the rail 90 men~ supplying pressure to the working spaces of the two hydraulic cylinders 10 causes displacement of the arch segments II towards the gate end, whereby the upper runner 7 travels over _ 4 --~ .
rail 9. Simultaneously, the liner element 5 come together telescopically.
After displacing the arch segments II the supporting hydraulic cylinders 4 are spragged, causing lifting of the arch elements 1, whereafter the sprag-ging hydraulic cylinders 2 are spragged, causes the roof-support elements 6 to be pressed against the roof. &bsequent operation withdraws the arch segments I, III and IV by means of hydraulic cylinders 2 and 4, so that the arch segments I, III and IY are suspended on the rail 9. Then, supplying pressure into the working spaces of the pistons of the hytraulic cylinders 10, displaces the arch segments I, III and IV, interconnected with tie rods 8.
Simultaneously, the liner elements 5 is extended. In turn, the supporting hydraulic cylinders 4 are spragged, lifting the arch elements 1, and then the spragging hydraulic cylinders 2 are spragged resulting in pressing the elements 6 to the roof, the supporting capacity of the lining ; thus being realized.
After displacing the walking lining along the heading the fixed lining is installed by means of the device provided on the last arch element of the walking lining. This is done b~ operation of the hydraulic cylinders 16 through the cable 20, lifting the triangle 15 at the end of which the gripper 21 is pivoted, the arch element of the fixed lining being installed on tbe triangle 15. After lifting the arch of the roof lining, the arch ele-ments of the roadside are added, and the arch elements are joined together with known screw joints.
Deflection of the gallery in the vertical direction is automatic-ally overcome by the lining by utilization of the grooved guides in plates 11, 13 and 14, the pins 19 fixing the rails 9, and of the spacing between the runners 7. Deflection of the heading or gallery to left or to right is accom-modated by actuation of the spragging hydraulic cylinder 2 from the lef~-hand or right-hand side, respectively. The roof-support el _ent 6 ~nks -- ~U914~0 and sprags the arch elements in the heading in the way described aboveO
Where the walking lining is used in curved cross headings instead of tie rods 8 hydraulic cylinders are installed, having l~ngths suited to the radius of the arch element.
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A walking lining for a mine gallery, said lining comprising:
(a) a plurality of arch segments each having two legs each supported on a foot through a vertically acting first hydraulic cylinder means, said legs converging in the upwards direction to meet at their upper ends in a crown;
(b) a roof support element associated with the upper part each said leg, a corresponding spragging cylinder having an upper end connected to the roof support element and a lower end connected to the leg, said spragging cylinder being operable to move the roof support element between an extended and a retracted position; (c) a rail structure extending longitudinally of the lining in the region of the crown thereof, said rail structure having a length spanning a series of said arch segments; (d) a first set of alternate arch segments being rigidly attached to said rail structure;
(e) a second set of arch segments interspaced by said first set and having bearing means operative to provide a sliding bearing connection with the rail upon relative vertical movement between the rail and the corresponding arch segment; (f) longitudinally extending strap means interconnecting said first set of arch segments in pairs and interconnecting said second set of arch segments in pairs; and (g) longitudinally extending second hydraulic cylinder means forming a connection between two adjacent arch segments; whereby upon retracting the first hydraulic cylinder means of one set of arch segments said bearing connection is established between said second set of arch segments and said rail, so that said sets can be moved longitudinally relative to each other through actuation of said second hydraulic cylinder means.
(a) a plurality of arch segments each having two legs each supported on a foot through a vertically acting first hydraulic cylinder means, said legs converging in the upwards direction to meet at their upper ends in a crown;
(b) a roof support element associated with the upper part each said leg, a corresponding spragging cylinder having an upper end connected to the roof support element and a lower end connected to the leg, said spragging cylinder being operable to move the roof support element between an extended and a retracted position; (c) a rail structure extending longitudinally of the lining in the region of the crown thereof, said rail structure having a length spanning a series of said arch segments; (d) a first set of alternate arch segments being rigidly attached to said rail structure;
(e) a second set of arch segments interspaced by said first set and having bearing means operative to provide a sliding bearing connection with the rail upon relative vertical movement between the rail and the corresponding arch segment; (f) longitudinally extending strap means interconnecting said first set of arch segments in pairs and interconnecting said second set of arch segments in pairs; and (g) longitudinally extending second hydraulic cylinder means forming a connection between two adjacent arch segments; whereby upon retracting the first hydraulic cylinder means of one set of arch segments said bearing connection is established between said second set of arch segments and said rail, so that said sets can be moved longitudinally relative to each other through actuation of said second hydraulic cylinder means.
2. A walking lining according to claim 1 wherein each arch segment includes a pair of angled bearing surfaces spaced one on each side of the crown and providing an abutment for the corresponding roof support element when the latter is in its retracted position.
3. A walking lining according to claim 1 wherein said strap means are adapted to accommodate transverse and vertical variations in the alignment of the arch segments longitudinally of the gallery.
4. A walking lining according to claim 3 wherein said strap means are flexible in the transverse direction and have ends pivotally connected to the arch segment near the lower ends thereof.
5. A walking lining according to claim 1, 2 or 3 wherein adjacent arch segments have telescopic liner elements extending longitudinally therebetween.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PLP-205542 | 1978-03-24 | ||
| PL20554278A PL115687B1 (en) | 1978-03-24 | 1978-03-24 | Gangway walking roof support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1091460A true CA1091460A (en) | 1980-12-16 |
Family
ID=19988250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA324,031A Expired CA1091460A (en) | 1978-03-24 | 1979-03-23 | Gallery walking lining |
Country Status (8)
| Country | Link |
|---|---|
| AT (1) | AT363428B (en) |
| CA (1) | CA1091460A (en) |
| DE (1) | DE2911339A1 (en) |
| FR (1) | FR2420645A1 (en) |
| GB (1) | GB2017196A (en) |
| NL (1) | NL7902088A (en) |
| PL (1) | PL115687B1 (en) |
| YU (1) | YU52879A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615269A (en) * | 2013-12-11 | 2014-03-05 | 范炳辉 | Improved soft rock roadway integral tunneling protection support |
| CN103711509A (en) * | 2014-01-10 | 2014-04-09 | 李明 | Self-moving arched shield support type lapping and shed erecting all-in-one machine |
| CN106948851A (en) * | 2017-03-31 | 2017-07-14 | 中国矿业大学 | A kind of alley hydraulic support |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102352756B (en) * | 2011-07-28 | 2014-11-26 | 中铁二十二局集团第六工程有限公司 | Door arc steel frame reinforcing system |
| CN102628368B (en) * | 2012-04-26 | 2014-07-09 | 李信斌 | Tunnel self-advancing support shed |
| CN103104267B (en) * | 2013-02-18 | 2015-01-07 | 范炳辉 | Soft rock roadway whole digging shield support |
| CN103643979B (en) * | 2013-07-15 | 2017-02-08 | 郑东风 | Hydraulic support used for roadway temporary support and erecting and use method of hydraulic support |
| CN104895592A (en) * | 2015-05-26 | 2015-09-09 | 神华集团有限责任公司 | Fully-mechanized coal mining and caving face support retracement supporting method |
| CN106761873B (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 method for protecting support of crushed zone |
| 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 |
| CN108457686A (en) * | 2018-04-18 | 2018-08-28 | 贵州大学 | A kind of balanced type Telescopic movable supporting arch up and down |
| CN108643942B (en) * | 2018-07-16 | 2023-11-10 | 西安科技大学 | Temporary inverted arch with adjustable hydraulic pressure |
| CN111236073A (en) * | 2020-01-13 | 2020-06-05 | 山东职业学院 | A supplementary strutting arrangement of construction for bridge construction |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1217566A (en) * | 1968-07-09 | 1970-12-31 | Wild A G & Co Ltd | Improvements in or relating to self-advancing underground roof supports |
| FR2022585A1 (en) * | 1968-11-05 | 1970-07-31 | Gullick Dobson Ltd | |
| DE2021734C3 (en) * | 1970-05-04 | 1978-08-31 | Heinz-Theo Dipl.-Ing. 5300 Bonn Walbroehl | Hiking support scaffolding for excavating tunnels or tunnels |
| GB1375562A (en) * | 1971-03-16 | 1974-11-27 | ||
| DE2363488C3 (en) * | 1973-12-20 | 1978-06-08 | Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal | Progressive expansion of the route |
-
1978
- 1978-03-24 PL PL20554278A patent/PL115687B1/en unknown
-
1979
- 1979-03-05 YU YU52879A patent/YU52879A/en unknown
- 1979-03-09 AT AT178179A patent/AT363428B/en not_active IP Right Cessation
- 1979-03-13 GB GB7908786A patent/GB2017196A/en not_active Withdrawn
- 1979-03-16 NL NL7902088A patent/NL7902088A/en not_active Application Discontinuation
- 1979-03-22 FR FR7907314A patent/FR2420645A1/en not_active Withdrawn
- 1979-03-22 DE DE19792911339 patent/DE2911339A1/en not_active Withdrawn
- 1979-03-23 CA CA324,031A patent/CA1091460A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615269A (en) * | 2013-12-11 | 2014-03-05 | 范炳辉 | Improved soft rock roadway integral tunneling protection support |
| CN103711509A (en) * | 2014-01-10 | 2014-04-09 | 李明 | Self-moving arched shield support type lapping and shed erecting all-in-one machine |
| CN106948851A (en) * | 2017-03-31 | 2017-07-14 | 中国矿业大学 | A kind of alley hydraulic support |
Also Published As
| Publication number | Publication date |
|---|---|
| YU52879A (en) | 1983-02-28 |
| FR2420645A1 (en) | 1979-10-19 |
| GB2017196A (en) | 1979-10-03 |
| ATA178179A (en) | 1981-01-15 |
| NL7902088A (en) | 1979-09-26 |
| DE2911339A1 (en) | 1979-10-04 |
| AT363428B (en) | 1981-08-10 |
| PL115687B1 (en) | 1981-04-30 |
| PL205542A1 (en) | 1979-09-24 |
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