CN204492858U - A kind of crowned section tunnelling suspension device - Google Patents
A kind of crowned section tunnelling suspension device Download PDFInfo
- Publication number
- CN204492858U CN204492858U CN201420396548.8U CN201420396548U CN204492858U CN 204492858 U CN204492858 U CN 204492858U CN 201420396548 U CN201420396548 U CN 201420396548U CN 204492858 U CN204492858 U CN 204492858U
- Authority
- CN
- China
- Prior art keywords
- crossbeam
- support
- suspension device
- saddle type
- seat
- 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- Withdrawn - After Issue
Links
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
A kind of crowned section tunnelling suspension device, entirety is arch door type structure.Its support comprises base (1), base (1) is provided with column (2) and supports whole suspension device, column (2) top is connected with longitudinal back timber (3), base there is vertical beam mount pad, the inside cover have movable vertical beam, movable vertical beam upper end and back timber hinged, back timber (3) is upper installs arching crossbeam (4, 9), arching crossbeam is provided with multiple saddle type beam seat (5), described saddle type beam seat (5) is provided with beam (7), beam (7) supports back, the arching crossbeam of crowned section tunnelling suspension device is divided into termination, left and right crossbeam (4) and left and right moved cross beam (9), termination, left and right crossbeam is hinged with the beam seat of set cap (3) by hinged pin-and-hole (12), it is inner that moved cross beam (9) is arranged on termination crossbeam (4), utilize spacing bearing pin spacing hinged through the limited mouth of limit pin hole (12) and moved cross beam (9).
Description
Technical field
The utility model relates to a kind of colliery driving suspension device, entirety is arch door type structure, in particular to the colliery driving frame that a kind of section is arch, it can complete all operations of tunnelling by supporting different model development machine jointly, controlroof and the advance support work of roadway head are comprised, can realize effectively supporting crowned section simultaneously, prevent potential safety hazard.
Background technology
Major part coal mine roadway generally adopts to blow out and tunnels and mechanical drivage, and along with constantly improving of road heading machinery equipment performance promotes, machinery tunnels the Main way having become development.But the human casualty accident of more than 40% is all the top board class accident occurred in face timbering process in the driving production operation of colliery.Because tunnelling limited space does not allow empty top operation, so driving and supporting influence each other all the time.Owing to not allowing empty top operation, supporting must be carried out in time, must advance support be carried out before permanent support, and advance support is affect the progress of excavation operation and the bottleneck of safety always.
In prior art in arch section tunnel suspension device, owing to all adopting fixing network structure, the tunnel that a set of equipment is only suitable for a kind of form of fracture uses, but the tunnel in a colliery needs different section structures because function is different, so the equipment of existing a certain specification cannot meet the whole headwork requirement in colliery, cause equipment overlapping investment; And be difficult to accomplish the top board structure of desirable standard as construction drawing due to tunnelling construction, cause beam can not reach reliably tunneling boring in support process and connect top, cause the super top plate portion of cutting of part cannot connect top and cause wall rock loosening; Simultaneously owing to connecing top area change, this causes the uneven pressure that can connect top portion that causes of support zone excessive, causes man-made further destroy to back country rock; Moving in frame process, cannot sliding advance of support, certainly will cause and temporaryly in frame process lose top plate supporting pressure moving, thus roof collapse accident can be caused because of wall rock loosening.
The utility model proposes to solve Problems existing and unsafe factor in the operating type of current coal mine roadway driving, work flow and concrete supporting operation.
Utility model content
Main purpose of the present utility model is under prior art conditions, a kind of crowned section tunnelling suspension device is proposed, it can make tunnelling operation technique flow process more rationally smooth and easy, not only increase driving split run output, improve the comprehensive utilization ratio of equipment, improve operational security simultaneously.
Disclosed in the utility model, crowned section tunnelling suspension device is in order to realize its technical requirements, entirety is door type structure, its main body rack comprises the symmetrical base longitudinally arranged in the left and right sides, base there is vertical vertical beam mount pad, the inside cover has movable vertical beam, movable vertical beam upper end and back timber hinged (vertical beam seat and movable vertical beam mechanism also can use quadric chain), two wing bases are provided with column along tunnel lateral wall is vertical, the whole suspension device of upright supports, the column top of both sides is all connected with longitudinal back timber, back timber is installed arching crossbeam, arching crossbeam is provided with multiple saddle type beam seat, described saddle type beam seat is longitudinally provided with beam, beam supports back, the arching crossbeam of crowned section tunnelling suspension device is divided into termination, left and right crossbeam and left and right moved cross beam, termination, left and right crossbeam is hinged by the beam seat of hinged pin-and-hole and set cap, in the cross girder of termination, section is hollow-core construction, it is inner that moved cross beam is arranged on termination crossbeam, can telescopic moving, utilize spacing bearing pin spacing hinged through the limited mouth of limit pin hole and moved cross beam.Between frame, interval is provided with advancing jack, realizes moving frame operation.
Wherein putting in order according to installation fixes tentatively as odd number group support and even number set support two kinds of supports, often kind of support all comprises multi-section support composition, the multi-section support spaced layout in the vertical of described two kinds of supports, beam is moved by auxiliary activity hinged between the support beam (11) of the multi-section support of odd number group support, also beam is moved by auxiliary activity hinged between the support beam (7) of the multi-section support of even number set support, the multi-section support of described two kinds of supports is furnished with advancing jack mechanism at base and back timber place longitudinal separation, can realize moving frame operation.The support beam of two kinds of supports at the top of suspension device in the horizontal mutually uniform intervals arrange, thus make two kinds of supports to move frame separately and not interfere with each other, when moving frame after any pack support release, the beam mechanism of adjacent stent can total head roof supporting.
Wherein left and right moved cross beam is arranged on termination crossbeam inner utilization limit adjusting mechanism and fixes, and the hinged pin-and-hole of termination, left and right crossbeam is slotted hole, and beam seat corresponding to left and right back timber is hinged, the hinged pin-and-hole hinge of left and right moved cross beam; Left and right crossbeam (termination crossbeam and moved cross beam) entirety is arranged in " people " font, hinged in moved cross beam end, left and right, effectively can improve supporting intensity, increases supporting width.
Wherein be provided with limit adjusting mechanism in the end of termination crossbeam, reliably spacing fixing with moved cross beam, the beam width of support can be regulated to meet the requirement of roadway construction width, bottom termination crossbeam and moved cross beam, the beam seat mounting limit mouth of the fluted type of matrix arrangements, can install beam seat by alignment pin.
Wherein also comprise the multiple saddle type beam seats for supporting beam, it straddles on crossbeam, utilizes fixing spacer pin and crossbeam limited mouth to come to realize interfixing between crossbeam; Multiple saddle type beam seat can be different according to position, can be provided with 5 °, 10 °, 15 °, 20 °, 25 °, 30 ° and adjust the angle of inclination of saddle type beam seat 5 relative to crossbeam, saddle type beam seat is by beam lifting guide pillar and regulate jack to support beam.
Wherein also comprise the adjustable beam of saddle type beam seat in crowned section tunnelling suspension device and support compensation mechanism, it is beam Compensation Regulation jack mount pad in the side of saddle type beam seat, Compensation Regulation jack is cross axle form, the shoulder axle compensating jack is arranged on the side of saddle type beam seat by deck, mount pad has fixation clip be bolted; The post alive compensating jack is connected with beam; Be beam lifting guide peg slideway at the opposite side of saddle type beam seat, be the upper and lower permeable structures of rectangular cross section, upper and lower opening is oblique angle structure; Beam lifting guide pillar is arranged on the inside; There is outstanding limiting plate beam lifting guide peg lower end, and the upper end thereof hole of guide rod is connected with the auxiliary hinge hole of beam.Be reinforcement gusset in saddle type beam seat upper end, downside has 3 groups of fixed pin holes to be fixed on crossbeam by steady pin; In order to prevent crossbeam to be subject to uneven support force, the positive and negative installation of saddle type beam seat adjacent on every root crossbeam.Beam Compensation Regulation mechanism suitably adjusts the position supporting beam according to roof condition, and connects topmast support force, can make the comprehensive secure support top board of support beam.
Limit at this, the direction described in the utility model is determined according to colliery direction of advance, and in tunnel, be longitudinally along tunnel direction of advance, in cross section, tunnel, left and right directions is that laterally vertical short transverse is vertical.
The colliery driving suspension device that the utility model provides, not only has the advantages such as supporting performance is good, intensity is high, and advancing velocity is fast, safe and reliable; The most important thing is that it breaches the interactive limitation that conditions each other of coal mine roadway driving normal process steps, achieve the parallel operations of each operation in the driving of colliery, use the utility model existing tunnelling speed can be improved 2-3 doubly.Alleviate the labour intensity of first-line staff, improve the working environment of whole excavation operation.It can also improve the accuracy of suspension device beam location, and prevents from Bracing Process, occur supporting leak.Use this cover suspension device, can save advance support link, simultaneously adopt adjustable structure because of it, a set of equipment can meet the use of different crowned section, simple to operate, alleviates the overlapping investment of equipment, and has very large technological innovation space.
Accompanying drawing explanation
Fig. 1 is the section front view of crowned section roadway support device;
Fig. 2 is the partial enlarged drawing of the front view of crowned section roadway support device;
Fig. 3 is the partial side view of crowned section tunnelling suspension device in tunnel;
Fig. 4: be crowned section tunnelling suspension device lateral view partial enlarged drawing;
Fig. 5: be the saddle type beam holder structure figure of crowned section tunnelling suspension device
Fig. 6: for adjustable beam supports compensation mechanism mounting structure elevation;
Fig. 7: for adjustable beam supports compensation mechanism mounting structure side figure;
Fig. 8: be the middle beam elevation of crowned section tunnelling suspension device;
Fig. 9: be the middle beam top view of crowned section tunnelling suspension device;
Figure 10: be the termination crossbeam elevation of crowned section tunnelling suspension device;
Figure 11: be the termination crossbeam top view of crowned section tunnelling suspension device;
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As depicted in figs. 1 and 2, the support of crowned section roadway support device of the present utility model comprises the base 1 that the left and right sides is arranged symmetrically with, on base 1, along both sides, tunnel, the vertical column 2 that is provided with supports whole suspension device respectively, two wing bases are also provided with vertical vertical beam seat along both sides, tunnel respectively, vertical beam seat is provided with vertical movable vertical beam 16, movable vertical beam lower end is stretched in vertical beam seat, movable vertical beam upper end and the back timber 3 hinged (vertical beam mechanism also can replace with lanar four rod mechanism) be longitudinally arranged symmetrically with along tunnel two side roof part; Column 2 upper support has longitudinal back timber 3, back timber 3 is mounted opposite arching crossbeam 4,9, and arching crossbeam 4,9 is adjustable structure, and supporting crossbeam in left and right is that " people " font is arranged, hinged in moved cross beam end, left and right; Arching crossbeam is provided with multiple saddle type beam seat 5, and described saddle type beam seat 5 is provided with longitudinal beam 7, and beam 7 supports back.
This cover crowned section tunnelling suspension device is in order to realize its technical requirements, putting in order according to installation fixes tentatively as odd number group support and even number set support two kinds of supports, often kind of support all comprises many groups support as shown in Figure 1, many pack supports layout as spaced in Fig. 2 in the vertical of described two kinds of supports, hinged by auxiliary telescopic beam 17 between the support beam 11 of many pack supports of odd number group support, also hinged by auxiliary telescopic beam between the support beam 7 of many pack supports of even number set support, odd number group support and even number support beam are separately arranged in lateral separation and are independent of each other, many pack supports of described two kinds of supports are at base and back timber place is longitudinally spaced is provided with thrust gear (being made up of advancing jack+universal joint+bearing pin), the support beam of two kinds of supports at the top of suspension device in the horizontal mutually uniform intervals arrange, thus make two kinds of supports to move frame separately and not interfere with each other.
Limit at this, the direction described in the utility model is determined according to tunnel direction of advance, and in tunnel, be longitudinally along tunnel direction of advance, in cross section, tunnel, left and right directions is that laterally vertical short transverse is vertical.
As shown in Figure 3, the crossbeam of crowned section tunnelling suspension device is divided into termination, left and right crossbeam 4 and left and right moved cross beam 9.Termination, left and right crossbeam is hinged with the beam seat of set cap 3 by hinged pin-and-hole 12, in termination crossbeam 4 body, section is hollow rectangle structure, it is inner that moved cross beam 9 is just arranged on termination crossbeam 4, can telescopic moving, utilize spacing bearing pin spacing hinged through the limited mouth of limit pin hole 12 and moved cross beam 9.The hinged pin-and-hole 13 of termination, left and right crossbeam 4 is slotted hole, can meet the change in displacement of crossbeam.The end (hinged pin-and-hole 13) of crossbeam is 135 ° of angles with termination crossbeam 4, reinforcement anchor ear is welded with at the afterbody of termination crossbeam 4, the beam seat being provided with row's fluted body in the downside of termination crossbeam 4 installs positioning port 14, can install beam seat by alignment pin.
As shown in Figure 4, crowned section supporting moved cross beam 9 is inserted in the crossbeam of termination, can telescopic moving, utilizes the limited mouth 14 of spacer pin and the moved cross beam be inserted in face end support limit pin hole fixing.Moved cross beam divides left and right two parts, by hinged pin-and-hole 15 with hinge together, main beam and articulated section are 135 ° of angles.In the downside limited location mouth 14 matrix arrangement of beam body, spread length is consistent with termination crossbeam.Have in moved cross beam inside the reinforcement gusset moving towards layout along beam body, the intensity of beam body can be increased.
As shown in Figure 5, crowned section tunnelling suspension device of the present utility model also comprises saddle type beam seat 5 and supports compensation mechanism with adjustable beam.Saddle type beam seat 5 adopts and straddles on crossbeam 17 (termination crossbeam 4 or moved cross beam 9), utilizes fixing spacer pin and realizes between crossbeam limited mouth 14 and crossbeam interfixing.In order to different angles supporting bracket beam, saddle type beam seat 5 can be different according to position, and the angle of crossbeam and Compensation Regulation jack 19 can be designed with 5 °, 10 °, 15 °, 20 °, 25 °, 30 °, guarantees that beam 7 can vertical support top board.Saddle type beam seat 5 is by beam lifting guide pillar 20 and regulate jack 19 to support beam 7.
The adjustable beam support compensation mechanism of saddle type beam seat 5 in crowned section tunnelling suspension device of the present utility model as shown in Figure 6.It is beam Compensation Regulation jack mount pad 23 in the side of saddle type beam seat 5, Compensation Regulation jack 19 be in order to when arched tunnel supporting in order to make beam be abutted against top, compensation connects gap, top, Compensation Regulation jack 19 is cross axle form, the shoulder axle of Compensation Regulation jack is just arranged on the side of saddle type beam seat by deck 24, in order to prevent jack from coming off, mount pad 23 there is fixation clip to be bolted.The post alive compensating jack is connected with the auxiliary hinge hole of beam by pin-and-hole.Be beam lifting guide peg slideway 25 at the opposite side of saddle type beam seat, be the upper and lower permeable structures of rectangular cross section, upper and lower opening is oblique angle structure; Beam lifting guide peg 20 is just arranged on the inside.Beam lifting guide peg lower end have outstanding limiting plate, the upper end thereof hole of guide peg and beam hinged.Be reinforcement gusset 26 in saddle type beam seat upper end, downside has 3 groups of fixed pin holes 27 to be fixed on crossbeam by steady pin.In order to prevent crossbeam to be subject to uneven support force, the positive and negative installation of saddle type beam seat adjacent on every root crossbeam.
A beam seat limited mouth is respectively had at moved cross beam top, left and right, as shown in Figure 1, the support beam at top uses common beam seat to install, two adjacent groups support is according to actual conditions top beam arranged in dislocation, as first top beam is arranged on left moved cross beam, so the top beam of the second frame is just arranged on right moved cross beam.Other beam installation principle of support is also the same, and such first support is when moving frame, and the beam of the second frame support normally connects topmast support, and respective beam is independent of each other.
Above-mentioned specific embodiment is described by example, should be understood that, these embodiments are subject to the impact of different distortion and Alternative Form.It should also be further understood that, claim is not meaned and is limited to disclosed particular form, and should cover all distortion dropped in the utility model essence and scope, equivalencing and optional manner.
Claims (7)
1. a crowned section tunnelling suspension device, entirety is arch door type structure, its device comprises left and right base (1), base (1) is provided with vertical column, base (1) there is vertical vertical beam mount pad, the inside cover have movable vertical beam, movable vertical beam upper end and back timber hinged; Two wing bases are provided with column (2) along tunnel lateral wall is vertical, column (2) supports whole suspension device, column (2) top is connected with longitudinal back timber (3), back timber (3) is upper installs arching crossbeam (4,9), arching crossbeam is provided with multiple saddle type beam seat (5), described saddle type beam seat (5) is provided with beam (7), beam (7) supports back, it is characterized in that:
The arching crossbeam of crowned section tunnelling suspension device is divided into termination, left and right crossbeam (4) and left and right moved cross beam (9), termination, left and right crossbeam is hinged with the beam seat of set cap (3) by hinged pin-and-hole (12), in termination crossbeam (4) body, section is hollow-core construction, it is inner that moved cross beam (9) is arranged on termination crossbeam (4), the length of transverse beam assembly can be regulated according to span length, utilize spacing bearing pin spacing hinged through the limited mouth of limit pin hole (12) and moved cross beam (9).
2. crowned section tunnelling suspension device as claimed in claim 1, longitudinal arrangement is installed in actual use, be not connected with equipment such as development machines, odd number group support and even number set support can be divided into according to the sequence number put in order, the multi-section support spaced layout in the vertical of described odd number group support and even number set support, linked together by floor stringer between the support beam (11) of the multi-section support of odd number group support, also linked together by floor stringer between the support beam (7) of the multi-section support of even number set support, the multi-section support of above-mentioned two pack supports is furnished with at base and interval, back timber place and moves frame mechanism, the support beam of two kinds of supports at the top of suspension device in the horizontal mutually uniform intervals arrange, be independent of each other, thus make two kinds of supports to move frame separately and not interfere with each other, simultaneously when any pack support moves frame, another pack support can be abutted against top by tunneling boring, guarantee roof safety.
3. crowned section tunnelling suspension device as claimed in claim 1 or 2, wherein the hinged pin-and-hole (13) of termination, left and right crossbeam (4) is slotted hole, can meet the change in displacement of crossbeam.
4. crowned section tunnelling suspension device as claimed in claim 1 or 2, is wherein provided with beam seat mounting limit mouth (14) of row's fluted body, can installs beam seat by alignment pin in the downside of termination crossbeam (4).
5. crowned section tunnelling suspension device as claimed in claim 1 or 2, wherein also comprise the multiple saddle type beam seats (5) for supporting beam, it straddles on crossbeam (4,9), utilizes fixing spacer pin and crossbeam limited mouth (14) to come to realize interfixing between crossbeam; Saddle type beam seat (5) both sides are separately installed with lifting guide pillar (20) and regulate jack (19), regulate jack (19) saddle type beam seat (5) relative to the angle of inclination of crossbeam (17), 5 °, 10 °, 15 °, 20 °, 25 °, 30 ° can be provided with; Saddle type beam seat (5) is by beam lifting guide pillar (20) and regulate jack (19) to support beam (7).
6. crowned section tunnelling suspension device as claimed in claim 1 or 2, wherein also comprise the adjustable beam of saddle type beam seat (5) in crowned section tunnelling suspension device and support compensation mechanism, be that beam compensates jack mount pad (23) in the side of saddle type beam seat (5), jack (19) is regulated to be cross axle form, the shoulder axle compensating jack is arranged on the side of saddle type beam seat by deck (24), mount pad (23) has fixation clip to be bolted; The post alive compensating jack is connected with the auxiliary hinge hole of beam by pin-and-hole; The opposite side of saddle type beam seat be beam lifting guide peg slideway (25), be the upper and lower permeable structures of rectangular cross section, upper and lower opening is oblique angle structure; Beam lifting guide pillar (20) is arranged on the inside; There is outstanding limiting plate beam lifting guide pillar lower end, and the upper end thereof hole of guide rod is connected with the auxiliary hinge hole of beam; Be reinforcement gusset (26) in saddle type beam seat upper end, downside has 3 groups of fixed pin holes (27) to be fixed on crossbeam by steady pin; In order to prevent crossbeam to be subject to uneven support force, the positive and negative installation of saddle type beam seat adjacent on every root crossbeam.
7. crowned section tunnelling suspension device as claimed in claim 1, wherein vertical beam seat and movable vertical beam mechanism also can substitute with quadric chain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420396548.8U CN204492858U (en) | 2014-07-14 | 2014-07-14 | A kind of crowned section tunnelling suspension device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420396548.8U CN204492858U (en) | 2014-07-14 | 2014-07-14 | A kind of crowned section tunnelling suspension device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204492858U true CN204492858U (en) | 2015-07-22 |
Family
ID=53572183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420396548.8U Withdrawn - After Issue CN204492858U (en) | 2014-07-14 | 2014-07-14 | A kind of crowned section tunnelling suspension device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204492858U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141504A (en) * | 2014-07-14 | 2014-11-12 | 霍忠明 | Arch-cross-section roadway tunneling support device |
| CN114278353A (en) * | 2021-12-16 | 2022-04-05 | 贵州盘江精煤股份有限公司 | Tunneling device with supporting function |
-
2014
- 2014-07-14 CN CN201420396548.8U patent/CN204492858U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141504A (en) * | 2014-07-14 | 2014-11-12 | 霍忠明 | Arch-cross-section roadway tunneling support device |
| CN114278353A (en) * | 2021-12-16 | 2022-04-05 | 贵州盘江精煤股份有限公司 | Tunneling device with supporting function |
| CN114278353B (en) * | 2021-12-16 | 2024-03-26 | 贵州盘江精煤股份有限公司 | Tunneling device with supporting function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103899343B (en) | Freedom degree parallel connection hydraulic support | |
| CN105003288B (en) | A kind of method and support system of medium-thickness seam gob side entry retaining | |
| CN104141504B (en) | A kind of crowned section tunnelling suspension device | |
| CN103410545B (en) | The hydraulic support of Sub-Level Caving and packing job can be realized | |
| CN103233761A (en) | Reversed loader moving-assisted large-cycle tunnel advance support bracket | |
| CN108457686A (en) | A kind of balanced type Telescopic movable supporting arch up and down | |
| CN202483604U (en) | Hydraulic support for pitched-roof roadway forepoling | |
| CN204492858U (en) | A kind of crowned section tunnelling suspension device | |
| CN106761860A (en) | A kind of roadway support equipment | |
| CN102305025B (en) | Anchor cable rig bracket | |
| CN203905987U (en) | Backfill hydraulic bracket | |
| CN208831028U (en) | A kind of colliery tunnel support equipment | |
| CN201747392U (en) | Combined top beam slipping hydraulic support system used in coal mine | |
| CN204200257U (en) | A kind of colliery driving suspension device | |
| CN101906984B (en) | Landing beam sliding hydraulic support system for coal mine | |
| CN104500117B (en) | Without repeatedly supporting continuous supporting advanced hydraulic support | |
| CN201460938U (en) | Forward supporting type end hydraulic support | |
| CN201209457Y (en) | Oblique top tunnel advanced support transversal moving forward support | |
| CN109838264A (en) | A kind of mobile roadway support device keeping top plate integrality | |
| CN103195458A (en) | Underground coal mine large channel end socket suspension hydraulic support | |
| CN204492830U (en) | The supporting job platform of a kind of colliery driving suspension device | |
| CN201137500Y (en) | Coal mine down-hole split articulation type advanced support bracket | |
| CN207161127U (en) | Adopt and fill joint hydraulic bracket system | |
| CN104265337A (en) | Tunneling temporary support device | |
| CN205330704U (en) | Hydraulic support top anchor rope protection device and hydraulic support |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150722 Effective date of abandoning: 20171003 |
|
| AV01 | Patent right actively abandoned |