CN107387139A - High inclination-angle withdraws force piece down dismantling technique - Google Patents
High inclination-angle withdraws force piece down dismantling technique Download PDFInfo
- Publication number
- CN107387139A CN107387139A CN201710638348.7A CN201710638348A CN107387139A CN 107387139 A CN107387139 A CN 107387139A CN 201710638348 A CN201710638348 A CN 201710638348A CN 107387139 A CN107387139 A CN 107387139A
- Authority
- CN
- China
- Prior art keywords
- support
- frame
- working face
- winches
- winch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/60—Devices for withdrawing props or chocks
- E21D15/606—Devices for withdrawing props or chocks the props being moved systematically
Abstract
The invention belongs to coal mine work area fully-mechanized mining equipment to withdraw technical field of construction, and in particular to a kind of high inclination-angle withdraws force piece down dismantling technique.The support down dismantling of the present invention employs is used as slideway in working face laying track, when both having avoided the descending haul of support, the problem of plough goods more shipment difficulties, reduces the resistance that support is hauled again；After support removing, coordinate the material that strips off the skin to move towards marguise supporting roof using diamond mesh in old man's side stand frame nest, be effectively prevented the threat that the leakage of old man's top plate pushes away cash, substantially increase the security of construction.
Description
Technical field
The invention belongs to coal mine work area fully-mechanized mining equipment to withdraw technical field of construction, and in particular to a kind of high inclination-angle withdraws work
Make face support down dismantling technique.
Background technology
High inclination-angle withdraws force piece dismounting, is highly difficult, excessive risk a projects, not only efficient, and
And need to be perfectly safe.It is normal to remove using up construction process for removing (referring to the invention of Application No. 201610298365.6
Patent application), but down dismantling technique is used for large inclination working surface, more seeming, difficulty is big, and security threat is big.
The content of the invention
It is an object of the invention to provide a kind of safe and efficient high inclination-angle to withdraw force piece down dismantling technique.
To achieve the above object, the invention provides following technical scheme：It is descending that a kind of high inclination-angle withdraws force piece
Remove technique, each hydraulic support in working face be named as successively from lower crossheading side to upper crossheading side the 1st support, the 2nd
Frame, the 3rd the n-th support of support ..., comprise the following steps：
Step 1：It will be installed in place for the winch for pulling hydraulic support, and cloth in the passage after scratch board conveyor dismounting
If slideway, slideway is provided with close to working face one end suitable for reading and climbs platform, and it is that can make floor undulation and cunning that this, which climbs platform,
Road hill-like structure in smoothing junction；Slideway one end of mouth under working face is connected with turning platform, the direction work of turning platform
The side in face Xia Kou tunnels is connected with loading platform；
Step 2：Grillage is beaten by channel side working face is suitable for reading, strengthens roof timbering suitable for reading；
Step 3：The n-th support is pulled using winch, the n-th support removing is gone out support frame nest, and tuning is extremely parallel with passage,
Then the n-th support is dragged on slideway from platform is climbed, limited block, limited block is installed in frame pin eyelet before and after the n-th support
Connect with slideway side gear, prevent the n-th support from being derailed during descending haul, recycle winch slowly to transfer the n-th support extremely
Turning platform, then turn to the n-th support using winch and be drawn to loading platform entrucking；
Step 4：After n-th support removing, wire netting is laid in old man's side frame nest, wire netting is laid from set cap front end
To support frame tail, reuse a post cooperation and take off cladding or monomer liquid compression leg cooperation I-shaped gooseneck to the progress gib of frame nest；
Step 5：Remove the (n-1)th support using with step 3 identical method, and using with step 4 identical method to the
The frame nest of n-1 framves carries out gib；
Step 6：The n-th -2 support is drawn in passage using winch, and makes the n-th -2 support frame head towards lower crossheading, with
N-th -2 support is as cover frame；When reason is that n framves are parallel with tuning rib after the dismounting of n-1 framves, the length in tunnel can not meet
It is required that (distance helped on the next frame of support that tunnel length refers to remove to upper crossheading, it is not enough to accommodate the length of a support
Degree, therefore cannot function as cover frame) so selection n-2 framves, otherwise n framves, n-1 framves can serve as cover frame.
Step 7：The n-th -3 support, the support of the n-th -4 support ... the 1st are removed successively using with step 3 identical method, its
In often remove a hydraulic support, cover frame hauls the distance of a hydraulic support width to mouth under working face, and in cover frame
Set-point post carries out gib below the face roof at rear；In the process, cover frame often advances a segment distance, then from
A section slideway is removed in one end suitable for reading close to working face, remains suitable to ensure that support and cover frame to be removed climb platform
Distance；
Step 8：After 1st support removing, grillage is stamped in frame nest in time and carries out gib；Then use and step 3
Cover frame is drawn to loading platform entrucking by identical method.
In the step 1, the winch includes：Positioned at working face tunnel suitable for reading with being set side by side in working face join domain
No. 7 winches and No. 8 winches put, wherein No. 7 winches, close to old man side, No. 8 winches are close to rib side；5 in working face
Number winch and No. 6 winches, No. 5 winches and No. 6 winches can constantly adjust installation site with the dismounting of each hydraulic support；With
And under working face mouth No. 2 winches and No. 4 winches, wherein No. 2 winches are located in working face Xia Kou tunnels, No. 4 winches lean on
Nearly old man side is set.
In the step 1, using the rail steel that twice are parallel to each other as slideway, the spacing between two rail steels is 1m.
The technical effects of the invention are that：Support down dismantling employs lays track as slideway in working face, both keeps away
When having exempted from the descending haul of support, the problem of plough goods more shipment difficulties, the resistance of support haul is reduced again；After support removing,
Coordinate the material that strips off the skin to move towards marguise supporting roof using diamond mesh in old man's side stand frame nest, be effectively prevented old man's top plate
Leakage pushes away the threat of cash, substantially increases the security of construction.
Brief description of the drawings
Fig. 1 is the winch layout drawing that embodiments of the invention are provided；
Fig. 2 be embodiments of the invention provided climb platform schematic diagram；
Fig. 3 is the lower bend combined liner plate schematic diagram that embodiments of the invention are provided；
Fig. 4 is the slideway use and rear passage supporting schematic diagram that embodiments of the invention are provided；
Fig. 5 is the 100# support removing schematic diagrames that embodiments of the invention are provided；
Fig. 6 is the support removing schematic diagram that embodiments of the invention are provided.
Embodiment
The present invention is described in detail below in conjunction with accompanying drawing.
The explanation of proper noun involved in the present invention：
Working face, refer to that coal mining region is used for the region for setting up coal-winning machine, drag conveyor, hydraulic support；
Working face is suitable for reading, refers to the higher one end of inclined cut physical features；
Mouth under working face, refer to the relatively low one end of inclined cut physical features；
Working face tunnel suitable for reading, is called crossheading, refer to one end higher with inclined cut physical features connect and with work
Move towards vertical tunnel in face；
Working face Xia Kou tunnels, are called lower crossheading, refer to one end relatively low with inclined cut physical features connect and with work
Move towards vertical tunnel in face；
Side where rib side, the side wall of the working face adjacent with upper and lower crossheading, and coal seam, the exploitation of coal-winning machine to；
Old man side, the side wall of the working face relative with rib side.
Technical scheme is described in detail so that the working face of 100 framves is removed as an example by the present invention：
Preparation before 1.1 constructions
It is support removing leading face and machine lane winch scheme of installation as shown in Figure 1, as illustrated needed for the installation of position
Winch.
It is shown in portion of working face tunnel side suitable for reading brush and expands winch nest, specification is 5m × 4.5m, highly not less than 2m.
Two JSDB-25 type winches, numbering 7#, 8# are mounted side by side in winch nest, dismounting and descending haul for hydraulic support are stayed
Rope etc., two winch rope races are respectively in shield support both sides.Working face 4#, 6# winch is JH-14 types, for support removing,
Tuning.5# is JH-14 type winches, and for lower loose equipment, auxiliary equipment is made a slip of the tongue bend under working face.The installation of working face winch
Position is in the passage in front of support foot.In addition to embodiment provided by the invention, selected winch model and steel wire rope are big
It is small to be required according to weight support frame and the inclined angle of working face according to safety regulations in coal mine, checked to obtain.
Hydraulic support dismounting, entrucking instrument, support material are assorted, processing in advance prepares slideway and climbs platform 6, loading platform
9, the auxiliary equipment such as lower bend combination bend backing plate 8, lower bend is combined into bend backing plate 8 and is arranged on what is exported under face working face
In machine lane, loading platform 9 is arranged on the rear of bend backing plate 8.Get all the support limited block that slideway uses ready.Climb such as Fig. 2 institutes of platform 6
Show, lower bend combined liner plate as shown in figure 3,
The use of 1.2 slideways
After working face passage inside strake conveyer machine and coal-winning machine are removed, in lower bend combined liner plate to 90# supports
Neighbouring staple rail road is as slideway 7, and using 2 strands of tracks as slideway 7, interorbital is away from for 1000mm, the spiral shell of rail clamping plate bolt
Cap is arranged on the outside of track, and bolt is installed by the outside of track to inner side through eyelet, so, it is possible to avoid hydraulic pressure branch
When being hauled on slideway 7, limited block supports and scrapes shank of bolt frame.Each section track is ordinatedly anchored on bottom plate using I-steel guidance tape
On, prevent that slideway 7 glides along working face when hydraulic support is hauled.Slideway 7 is climbed into platform 6 installed in the upper end of slideway 7
Head, it will climb platform 6 using road clamping plate and be attached with slideway 7, Shang Qi roads clamping plate and bolt.The schematic diagram of slideway 7 such as Fig. 4 institutes
Show.
Hydraulic support removes out support frame nest, after tuning is parallel with passage, is hauled using winch to slideway 7 and climbs platform
6 fronts, the interim feed flow of hydraulic support stretches out hydraulic support passage hydraulic cylinder, on Luo Pa roads platform 6, feed flow lifts liquid certainly
Cylinder pressure lifts support, coordinates receipts passage hydraulic cylinder that support is moved on slideway 7 from shifting, is adjusted using support face guard auxiliary is not torn open
Position of the whole support on slideway 7, four pieces of limited blocks are installed in frame pin eyelet before and after support, prevent support in descending haul
During, slide down, leak etc..
The roof control of passage after 1.3
Before 1st frame support removing, grillage is beaten between 100# framves and 7#, 8# winch nest, leans on passage working face is suitable for reading
Grillage 1 is beaten in side, strengthens roof timbering suitable for reading.
When support removing tuning, according to roof conditions, in support frame nest plus 3-4 root points post first can be mended as interim branch
Protect top plate.
After old man's side stand is removed, the 10# for moving towards that specification is long 45000mm × wide 1600mm is laid in old man's side frame nest
Wire netting, joint part are fixed using 10# iron wires and former wire netting, paving location：From support front-axle beam to support frame tail.Reuse
The 3.5m material 4 that strip off the skin are chosen one and drained to canopy, the post of a beam three.According to roof conditions, it can suitably increase the strengthening supporting of a post 5.
Channel side uses a cover frame supporting roof, and cover frame posterior approach point on I-steel 2 is moved towards is no less than three
Monomer or point post 3 are arranged, position exists respectively：The row of rib side one, the row of passage one and old man side I-steel termination after cover frame, strengthen
I-steel marguise supporting, point of use post, marguise or grillage strengthening supporting are wanted if exception occurs in top plate.Passage does not surpass behind rib side
Cross 5 framves and make a call to a grillage, grillage Ying Yuding, bottom plate connect strength.As roof cracking pressure is larger, grillage can be encrypted suitably.Supporting
Schematic diagram is as shown in Figure 4
According to live top plate actual conditions, the both ends for moving towards marguise point post and putting in advance at least 10m length are carried out in old man
Fag end replaces back canopy not less than φ 21.5mm steel wire ropes, sees that four canopies return a canopy in principle, allows top plate natural caving.Such as top plate pressure
, can temporarily more stationary point posts, marguise supporting roof when power is larger.
When removing last 3 supports, stamp grillage strengthening supporting in frame nest in time, when cover frame is removed under working face mouth
Channel side beats grillage strengthening supporting.
The requirement of access points post meets mountain energetically, and the timely complement of beam folding post of breaking is strengthened, it is ensured that cover frame both sides have not less than 800mm
Passage, all monomers, point post must not hinder rope race.
1.4 support down dismantling techniques
1. 100# support removings
Before support removing, first choose one in passage frame head is moved towards into steel I-beam along mountain 4.5m H shaped steel shacks and hold, remove branch
Frame original liquid feeding pipeline, connects interim liquid feeding pipeline, uses the big chain not less than ￠ 22*86 to hang 16t in 99# frame front-axle beams correct position
Leading block, 6# winches are suspended to 100# supports using 25t shackles by pulley and elapsed on connector, connected using 7# winches gib head
Anti-down in support short column correct position, 7# winches are energetic, and support is preferably minimized into position.6# winches are drawn, and 7# winches, which coordinate, to be received
Rope band strength, 100# framves are slightly pulled out frame nest, coordinate monomer auxiliary that support is released into frame nest as pulling force is larger, far control feed flow, will
Set cap rises and leaned against on next frame back timber, and 8# winch gib head hanging bracket short column correct positions is energetic, and 7# winch gib heads change
On hanging bracket frame tail or rear column, 3 winches coordinate support tuning, parallel with rib (head direction towards working face below),
8# winches change hanger tail.Rope race not timing, it is oriented to using 16t pulleys.Support removing schematic diagram is as shown in Figure 5
2. the selection of shield support
According to removing the methods of 100# supports by 98# support removings, by support be adjusted to it is parallel with rib after, nearest
Frame elapses makes a call to a monomer between cover frame base, remote control by cover frame to the passage of rib side, away from rib side 800mm or so,
Support is risen and top plate connects strength and used as shield support.Shield support front-axle beam front end, which must prop up, does not tear the frame of support the 3rd open
Frame head, beam sides, which must not be torn open the second frame of support extensible canopy and stretch out, before shield support props up, and prevents shield support hydraulic glide.
Shield support frame condition must be good, it is necessary to ensure that intact, the operation such as bracket upright post, various hydraulic cylinders, pipeline sealing
Valve group meets the requirements.
3. the dismounting of 97-1# supports
During support removing, the passage hydraulic cylinder feed flow of support to be removed is stretched out, coordinated using the big chain of ￠ 22*86mm types
25t shackles, ring chain and supporting connection ring connect support to be removed passage and shield support passage, are received using remote control feed flow
Support to be removed elapses hydraulic cylinder, repeatedly pinches chain and support removing is gone out into frame nest from shifting mode.After support removing goes out frame nest, 6# is used
Winch is drawn, and rope, anti-down is stayed using the cooperation of 7#, 8# winch in the way of 100# supports are removed.3 winches, which coordinate, adjusts support
To parallel with coal side.Support removing schematic diagram is as shown in Figure 6
With the dismounting of hydraulic support, working face has a JH-14 types winch to coordinate traction all the time, and two JSDB-25 are twisted
Car progress is anti-down, and working face 6#, 5# winch depending on concrete condition as the dismounting of support moves down or removes, removed by working face winch
Bi Hou, with 4# or 2# winch auxiliary traction supports.The dismounting of last 5 supports, using 2# winches to front haulage.
4. the dismounting of shield support
1# framves stamp 2 grillages in frame nest in time after removing, and a grillage is made a call in front of 4# winches.Leaned in cover frame
Old man chooses side one along mountain marguise, cover frame is minimized into position, 2# winches hanging bracket passage head, 8# winches coordinate 10t pulleys
Hanging bracket afterbody tuning, two winches, which coordinate, turns round support.
5. support haul, truck-loading scheme
After support removing, drawn using working face 6# winches, 8# winches stay rope that support is hauled into sliding way 7, are slided on support
Behind road 7, upper neat limiting device for bracket, by the way of loose under 8# winches, by bend backing plate 8 under mouth under pine under support to working face
On, lock is persistenced rope winch, and 5# winch gib heads hang over support afterbody and energetic, and 8# winch gib heads, which change, to be suspended to support and lean on rib side wall supporting
On plate, 4# winch gib heads, 2# winch gib heads hanging bracket passage, by support rounding curved, excision 8#, 5# with 3 winches are extractd
Winch gib head, support is hauled into the upper entrucking of loading platform 9 by 2# winches.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (3)
1. a kind of high inclination-angle withdraws force piece down dismantling technique, each hydraulic support in working face from lower crossheading side to
Upper crossheading side is named as the 1st support, the 2nd support, the 3rd the n-th support of support ... successively, it is characterised in that including following step
Suddenly：
Step 1：It will be installed in place for the winch for pulling hydraulic support, and lay and slide in the passage after scratch board conveyor dismounting
Road, slideway are provided with close to working face one end suitable for reading and climb platform, and it is that floor undulation can be made to be put down with slideway that this, which climbs platform,
The hill-like structure of slip；Slideway one end of mouth under working face is connected with turning platform, and turning platform is towards under working face
The side in mouth tunnel is connected with loading platform；
Step 2：Grillage is beaten by channel side working face is suitable for reading, strengthens roof timbering suitable for reading；
Step 3：The n-th support is pulled using winch, the n-th support removing is gone out support frame nest, and tuning is extremely parallel with passage, then
N-th support is dragged on slideway from platform is climbed, limited block, limited block and cunning are installed in frame pin eyelet before and after the n-th support
Road side gear is connect, and prevents the n-th support from being derailed during descending haul, and recycling winch, slowly the n-th support of decentralization is extremely turned
Platform, then turn to the n-th support using winch and be drawn to loading platform entrucking；
Step 4：After n-th support removing, wire netting is laid in old man's side frame nest, wire netting is routed to branch from set cap front end
Frame frame tail, reuse a post cooperation and take off cladding or monomer liquid compression leg cooperation I-shaped gooseneck to the progress gib of frame nest；
Step 5：The (n-1)th support is removed using with step 3 identical method, and is used with step 4 identical method to the (n-1)th frame
Frame nest carry out gib；
Step 6：The n-th -2 support is drawn in passage using winch, and makes cover frame frame head towards lower crossheading, with the n-th -2
Frame is as cover frame；
Step 7：The n-th -3 support, the support of the n-th -4 support ... the 1st are removed successively using with step 3 identical method, wherein often
A hydraulic support is removed, cover frame hauls the distance of a hydraulic support width to mouth under working face, and at cover frame rear
Face roof below set-point post carry out gib；In the process, cover frame often advances a segment distance, then from close
A section slideway is removed in working face one end suitable for reading, to ensure that support and cover frame to be removed remain suitable with climbing platform
Distance；
Step 8：After 1st support removing, grillage is stamped in frame nest in time and carries out gib；Then using identical with step 3
Method cover frame is drawn to loading platform entrucking.
2. high inclination-angle according to claim 1 withdraws force piece down dismantling technique, it is characterised in that：In the step
In rapid 1, the winch includes：Positioned at working face tunnel suitable for reading and No. 7 winches being arranged side by side in working face join domain and No. 8
Winch, wherein No. 7 winches, close to old man side, No. 8 winches are close to rib side；No. 5 winches and No. 6 winches in working face, 5
Number winch and No. 6 winches can constantly adjust installation site with the dismounting of each hydraulic support；And the mouth under working face
No. 2 winches and No. 4 winches, wherein No. 2 winches are located in working face Xia Kou tunnels, No. 4 winches are set close to old man side.
3. high inclination-angle according to claim 1 withdraws force piece down dismantling technique, it is characterised in that：The step
In 1, using the rail steel that twice are parallel to each other as slideway, the spacing between two rail steels is 1m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710638348.7A CN107387139B (en) | 2017-07-31 | 2017-07-31 | Downward dismantling process for large-inclination-angle retracting working surface support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710638348.7A CN107387139B (en) | 2017-07-31 | 2017-07-31 | Downward dismantling process for large-inclination-angle retracting working surface support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107387139A true CN107387139A (en) | 2017-11-24 |
| CN107387139B CN107387139B (en) | 2020-01-10 |
Family
ID=60342414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710638348.7A Active CN107387139B (en) | 2017-07-31 | 2017-07-31 | Downward dismantling process for large-inclination-angle retracting working surface support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107387139B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109083663A (en) * | 2018-08-24 | 2018-12-25 | 淮北矿业股份有限公司 | A kind of dismounting device for underground coal mine fully-mechanized mining working |
| CN112012772A (en) * | 2020-07-15 | 2020-12-01 | 陕西麟北煤业开发有限责任公司 | Technical method for replacing hydraulic support shield beam of coal mine 1012001 fully mechanized caving face |
| CN114033458A (en) * | 2021-10-22 | 2022-02-11 | 国家能源集团宁夏煤业有限责任公司 | Fully mechanized coal mining face withdrawing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2091331A (en) * | 1981-01-13 | 1982-07-28 | Alsace Mines Potasse | Hydraulic positioning device for the props of a hydraulic supporting assembly |
| DE3414197C2 (en) * | 1984-04-14 | 1990-03-29 | G. Duesterloh Gmbh, 4322 Sprockhoevel, De | |
| CN105065044A (en) * | 2015-08-05 | 2015-11-18 | 长治市永华机械有限公司 | Hydraulic support frame removing platform |
| CN204851299U (en) * | 2015-08-18 | 2015-12-09 | 河南理工大学 | Colliery is combined in pit and is adopted working face hydraulic support loading device |
| CN204984464U (en) * | 2015-08-05 | 2016-01-20 | 长治市永华机械有限公司 | Mechanized transition system of hydraulic support one continuous line |
-
2017
- 2017-07-31 CN CN201710638348.7A patent/CN107387139B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2091331A (en) * | 1981-01-13 | 1982-07-28 | Alsace Mines Potasse | Hydraulic positioning device for the props of a hydraulic supporting assembly |
| DE3414197C2 (en) * | 1984-04-14 | 1990-03-29 | G. Duesterloh Gmbh, 4322 Sprockhoevel, De | |
| CN105065044A (en) * | 2015-08-05 | 2015-11-18 | 长治市永华机械有限公司 | Hydraulic support frame removing platform |
| CN204984464U (en) * | 2015-08-05 | 2016-01-20 | 长治市永华机械有限公司 | Mechanized transition system of hydraulic support one continuous line |
| CN204851299U (en) * | 2015-08-18 | 2015-12-09 | 河南理工大学 | Colliery is combined in pit and is adopted working face hydraulic support loading device |
Non-Patent Citations (1)
| Title |
|---|
| 曹如彦等: "复杂地质条件下大型综放面设备安全回撤技术", 《煤炭工程》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109083663A (en) * | 2018-08-24 | 2018-12-25 | 淮北矿业股份有限公司 | A kind of dismounting device for underground coal mine fully-mechanized mining working |
| CN112012772A (en) * | 2020-07-15 | 2020-12-01 | 陕西麟北煤业开发有限责任公司 | Technical method for replacing hydraulic support shield beam of coal mine 1012001 fully mechanized caving face |
| CN114033458A (en) * | 2021-10-22 | 2022-02-11 | 国家能源集团宁夏煤业有限责任公司 | Fully mechanized coal mining face withdrawing method |
| CN114033458B (en) * | 2021-10-22 | 2023-10-20 | 国家能源集团宁夏煤业有限责任公司 | Fully mechanized mining face retracting method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107387139B (en) | 2020-01-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105909295B (en) | Rapid withdrawing support and equipment system for roadway-free coal-pillar-free self-retaining roadway mining method | |
| CN108361034B (en) | A kind of order mining large-mining-height working surface is quickly moved technique | |
| CN101845958B (en) | Fully mechanized coal face bracket withdrawing method and bracket traction puller for withdrawing | |
| CN102094675B (en) | Safe moving and withdrawing method of complex-structured thick coal seam fully mechanized heavy equipment | |
| CN107387139A (en) | High inclination-angle withdraws force piece down dismantling technique | |
| CN105003288B (en) | A kind of method and support system of medium-thickness seam gob side entry retaining | |
| CN108035715B (en) | A kind of unregulated fully mechanized coal mining face just adopts stage isometric tune face method | |
| CN203717005U (en) | Cyclically moving advanced supporting hydraulic bracket for two roadways of fully mechanized coal mining face | |
| CN108005654B (en) | Construction process for overhead mining large-mining-height working face old roadway passing | |
| CN103061765B (en) | Z type horizontal stratification top coal caving coal mining method in half-edge thick coal seam | |
| CN206458492U (en) | Support group for coal mining | |
| CN105927255B (en) | A kind of rock filling gob side entry retaining gangue stopping device | |
| CN106677813A (en) | Novel temporary supporting device for coal mine roadway comprehensive digging face | |
| CN109763861A (en) | One kind cutting intraocular fault belt treatment of roof collapse method | |
| CN104963688B (en) | Prevention and control method for falling of pumice at roof and two slopes of stope in medium-long hole mining | |
| CN105863691A (en) | Fully mechanized coal mining face support retracting roof supporting construction method | |
| CN104373147A (en) | Folding extension type roadway hydraulic bracket and application method thereof | |
| CN104712356B (en) | A kind of hydraulic pressure supports tunnel sectional shelf-unit and construction method from moving circulation | |
| CN215369687U (en) | Auxiliary supporting mechanism for drilling of multi-row anchor rods | |
| CN105937400B (en) | It is a kind of once to tunnel Liu Sheshuan lanes digging operation production line | |
| CN100439652C (en) | Fully-mechanized mining working face smooth trough advancing reinforcement support process and hydraulic support therefor | |
| CN108049897A (en) | Construction technology is withdrawn from the fully-mechanized mining working for moving crossbeam and move certainly crossbeam using this | |
| CN105937401B (en) | The method for protecting support in Liu Sheshuan lanes is once tunneled in a kind of U-shaped ventilation | |
| CN107130990A (en) | A kind of large-mining-height working surface tears frame method open | |
| CN205532650U (en) | Roof support structure and well worker colliery withdrawing working face that has this structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |