CN106437808B - Hydraulic support and hydraulic support control method - Google Patents
Hydraulic support and hydraulic support control method Download PDFInfo
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- CN106437808B CN106437808B CN201611055077.4A CN201611055077A CN106437808B CN 106437808 B CN106437808 B CN 106437808B CN 201611055077 A CN201611055077 A CN 201611055077A CN 106437808 B CN106437808 B CN 106437808B
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- pressure
- back timber
- relief device
- hydraulic support
- pressure relief
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
Abstract
A kind of hydraulic support and hydraulic support control method, the hydraulic support includes bracket base, back timber, advancing jack, face guard, face guard jack, bracket upright post, bracket upright post includes forward and backward row's bracket upright post, characterized in that, also include preceding spy back timber, preceding spy back timber jack, forward and backward disposing pressure device, wherein, the preceding front visited back timber and be located at set cap, it is flexible by preceding spy back timber jack control, inserted in supporting operation in rib；Front-seat bracket upright post is connected by front-seat pressure relief device with emulsion box, heel row bracket upright post is connected by heel row pressure relief device with the emulsion box, front-seat pressure relief device and the release independently of each other of heel row pressure relief device, and forward and backward disposing pressure device is classification pressure relief device.The present invention is directed to class soil property coal, provides effective working space for face guard using preceding spy back timber, is advantageous to the complete opening of side protection plate of hydraulic support, fully play the backplate effect of hydraulic support, and then improves the stability of rib.
Description
Technical field
The present invention relates to a kind of Coal Mining Technology field, more particularly, to a species soil property coal working surface hydraulic support and
Hydraulic support control method, seam mining means of defence.
Background technology
Weak seam low intensity, structural difference are similar to loess to being formd under mechanical condition in long-term specific geology
Physics classroom teaching, it is this broken, loose like the non-native coal body of soil, be class soil property coal.
Rib easy slice caving unstability in class soil property coal working face mining process, the stability problem of rib seriously constrain class soil
The safety and high efficiency in matter coal seam.During the back production of coal seam, hydraulic support plays a key role in supporting, and selects suitable hydraulic support
It is prevention and control coal wall caving, improves the premise of coal body stability.
Although the existing hydraulic support for weak seam working face adds face guard, but after coal-winning machine coal cutting,
Newly exposed top easily inbreak, the coal and rock of inbreak are deposited in front of rib, reduce the space in front of hydraulic support, cause
Face guard is difficult to open completely, and the wall supporting performance of support is not in full use, supporting effect also unobvious, can not be to greatest extent
Raising coal body stability.
After coal extraction, the stress redistribution of face surrounding rock a, part acts on answering on country rock around stope originally
Power is transferred on hydraulic support, when act on the pressure on support it is very big when, if can not timely release, easily cause wearing for support
Bottom even kills, and causes the advance of the face to stagnate, and has a strong impact on production.
It is more at present to prevent pressure rack, performance requirement of this mode to hydraulic support by improving hydraulic support working resistance
Very high, cost is also higher, and can not thoroughly prevent pressure rack accident.
The content of the invention
It is an object of the invention to provide a species soil property coal working surface hydraulic support, to improve rib in recovery process
Stability；When roof weighting is larger can release on one's own initiative in time, prevent pressure rack.
The present invention also aims to provide a kind of hydraulic support control method, can be led in time when roof weighting is larger
The release of dynamic ground, prevents pressure rack.
The present invention also aims to provide the seam mining means of defence of a species soil property coal, exploited with improving rib
The stability of rib in journey.
Therefore, the invention provides a kind of hydraulic support, including bracket base, set cap, advancing jack, shield
Side board and face guard jack, bracket upright post, the bracket upright post are including preceding between set cap and bracket base
Arrange bracket upright post and heel row bracket upright post, it is characterised in that characterized in that, also include it is preceding visit back timber, preceding spy back timber jack,
The front-seat pressure relief device set in the front-seat bracket upright post and the heel row release set in the rear in row's bracket upright post
Device, wherein, the front that back timber is located at the set cap is visited before described, it is flexible by the preceding spy back timber jack control, and
And inserted in supporting operation in rib；The front-seat bracket upright post is connected by front-seat pressure relief device with emulsion box, described
Heel row bracket upright post is connected by heel row pressure relief device with the emulsion box, the front-seat pressure relief device and heel row pressure relief device
Release independently of each other, and the front-seat pressure relief device and heel row pressure relief device are classification pressure relief device.
Further, above-mentioned preceding back timber of visiting is spade-type.
Further, above-mentioned preceding one end for visiting back timber jack is fixedly connected with set cap, the other end and preceding spy back timber
It is fixedly connected.
Further, one end of above-mentioned face guard jack is connected with set cap, and the other end is connected with face guard.
Further, the connection end of above-mentioned face guard is hinged with set cap.
Further, above-mentioned preceding spy back timber and the preceding width for visiting back timber jack are less than the width of set cap.
Further, above-mentioned face guard includes the wall supporting plate body parallel to the scope of operation at work and visits back timber thousand positioned at pricker
The connecting rod of the jin top left and right sides, wherein, connecting rod includes the connection end being hinged with set cap.
Further, the position that back timber bottom surface is visited before of above-mentioned face guard is provided with avoidance face, wherein, avoidance face is being protected
During side board supporting operation avoiding space is formed between rib.
Further, the above-mentioned preceding bottom surface for visiting back timber is inclined-plane, and the angle with horizontal plane is 5 ° -10 °.
Further, the front-seat pressure relief device is three-level pressure relief device, including with sequential series on main release oil circuit
First sequence valve, the second sequence valve and the 3rd sequence valve, it is additionally included in after first sequence valve and unloads force feed with the master
Road connection the first pressure-relief valve, the second pressure-relief valve after second sequence valve with the main release oil communication, in institute
The 3rd pressure-relief valve with the main release oil communication after the 3rd sequence valve is stated, wherein, the Opening pressure of first sequence valve
Equal to 0.80-0.85 times of working resistance of hydraulic vertical prop, the Opening pressure of second sequence valve is equal to the 1.0- of hydraulic vertical prop
1.05 times of working resistances, the Opening pressure of the 3rd sequence valve is equal to 1.3-1.35 times of working resistance of hydraulic vertical prop, described
The Opening pressure of first pressure-relief valve, the second pressure-relief valve and the 3rd pressure-relief valve is 0.1-0.3 times of working resistance of hydraulic vertical prop.
According to another aspect of the present invention, there is provided a kind of hydraulic support control method, make the front-seat pressure relief device and
The heel row pressure relief device release independently of each other, and release is classified according to roof weighting, pass through front row when roof weighting
Pressure relief device and/or heel row pressure relief device automatic classification off-load, to reduce the front and/or rear of set cap height, to prevent
Only pressure rack.
Further, it is three-level release that the front-seat pressure relief device is classified release according to roof pressure, wherein, reach in pressure
One-level release is carried out during 0.80-0.85 times of working resistance, pressure reaches 1.0-1.05 times of working resistance after the one-level release
Two level release is constantly carried out, reaching 1.3-1.35 times of working resistance in two level release downstream pressure carries out three-level release.
According to another aspect of the present invention, there is provided the seam mining means of defence of a species soil property coal, using according to upper
Class soil property coal working surface hydraulic support described by face, the means of defence comprise the following steps：Rib is exploited in coal mining machine roller
When reaching the hydraulic support position, preceding the spy back timber and face guard of the hydraulic support are reclaimed, carries out coal cutting；Coal cutting knot
Shu Suihou reclaims the bracket upright post of the hydraulic support, before drag conveyor and advancing jack traction hydraulic support entirety
Move, then rise the bracket upright post, support the set cap；Back timber jack is visited before opening forces the preceding back timber of visiting to be inserted
Enter rib, and open face guard jack and open face guard；And promote drag conveyor and coal mining using advancing jack
Machine moves forward, and waits exploitation next time.
Compared with the prior art, the present invention has the beneficial effect that：
The present invention visits back timber before being devised above set cap leading portion, face guard, after coal-winning machine coal cutting, preceding spy back timber
The top plate that supporting newly exposes can be stretched out in time under the promotion of preceding spy back timber jack, roof collapse is prevented, ensure that hydraulic pressure
Space between support and rib, effective working space is improved for face guard, is advantageous to the complete opening of side protection plate of hydraulic support,
The backplate effect of hydraulic support is fully played, improves the stability of rib.
The front end and/or rear end of set cap of the present invention independently reduce height in roof weighting, and according to top plate
Pressure classification release, so as to play a part of decompression buffering, to prevent the inclination of support and pressure rack.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to figure, the present invention is further detailed explanation.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows the structural representation of class soil property coal working surface hydraulic support according to an embodiment of the invention；
Fig. 2 shows the top structure of class soil property coal working surface hydraulic support according to an embodiment of the invention；
Fig. 3 shows that class soil property coal working surface hydraulic support according to an embodiment of the invention uses shape in stope
The schematic diagram of state；
Fig. 4 shows the structural representation of the face guard of class soil property coal working surface hydraulic support according to an embodiment of the invention
Figure；And
Fig. 5 shows the flow chart of the seam mining means of defence of class soil property coal according to an embodiment of the invention.
Fig. 6 shows the principle schematic of the three-level pressure relief device of the classification release hydraulic support of the present invention.
Description of reference numerals
1st, preceding spy back timber；2nd, preceding spy back timber jack；
3rd, face guard；4th, face guard jack；
5th, set cap；6th, bracket upright post；
7th, bracket base；8th, advancing jack；
9th, drag conveyor；10th, coal-winning machine；
11st, coal mining machine roller；12nd, rib；
13rd, support caving shield；14th, support tail boom；
31st, wall supporting plate body；32nd, connecting rod；
33rd, face is avoided；1a, top surface；
1b, bottom surface；61 pressure-relief valves；
62nd, prior-warning device；15th, goaf；
16 roofs；17 coal seams floor
20th, pressure relief device；
21st, the first sequence valve；22nd, the second sequence valve；
23rd, the 3rd sequence valve；24th, the first pressure-relief valve；
25th, the second pressure-relief valve；26th, the 3rd pressure-relief valve.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Fig. 1 to Fig. 4 is shown according to some embodiments of the present invention.
As shown in figures 1 and 3, class soil property coal working surface hydraulic support includes bracket base 7, set cap 5, bracket upright post
6th, advancing jack 8, face guard 3 and face guard jack 4, bracket upright post is between set cap and bracket base, bag
Include front-seat bracket upright post and heel row bracket upright post.Hydraulic support also includes preceding spy back timber 1, preceding spy back timber jack 2, before described
The front-seat pressure relief device set in row's bracket upright post and the heel row pressure relief device set in the rear in row's bracket upright post；Its
In, preceding back timber 1 of visiting be located at the front of set cap 5, controls flexible by preceding back timber jack 2 of visiting, and is used in supporting operation
In inserting in rib.Front-seat bracket upright post is connected by front-seat pressure relief device with emulsion box, and the heel row bracket upright post passes through
Heel row pressure relief device connects with the emulsion box, front-seat pressure relief device and heel row the pressure relief device release independently of each other,
And the front-seat pressure relief device and heel row pressure relief device are classification pressure relief device.
Wherein, preceding one end of spy back timber jack 2 is connected with set cap 5, and the other end is connected with preceding spy back timber 1, preceding
Visiting the stretching of back timber jack 2 can promote preceding back timber 1 of visiting to move forward, and one end of face guard jack 4 is connected with set cap 5, separately
One end is connected with face guard 3, and face guard jack 4, which stretches out, can open face guard 3, and bracket upright post 6 is located at set cap 5 and branch
Between frame base 7, bracket upright post 6 is used for supporting support back timber 5, and advancing jack 8 is connected with bracket base 7.
The present invention visits back timber before being devised above set cap leading portion, face guard, after coal-winning machine coal cutting, preceding spy back timber
The top plate that supporting newly exposes can be stretched out in time under the promotion of preceding spy back timber jack, roof collapse is prevented, ensure that hydraulic pressure
Space between support and rib, effective working space is improved for face guard, is advantageous to the complete opening of side protection plate of hydraulic support,
The backplate effect of hydraulic support can be played to greatest extent, improve the stability of rib.
In one embodiment, as shown in Fig. 2 preceding spy back timber 1 is spade-type.Preferably, the preceding top surface 1a for visiting back timber 1 is level
Face, bottom surface 1b are inclined-plane, and along the stretching direction of preceding spy back timber 1, for the preceding thickness for visiting back timber 1 by thick thinning, end is pointed.It is more excellent
Selection of land, the preceding bottom surface 1b for visiting back timber oblique angle is between 5 ° -10 °, such as 6 °.In the present embodiment, the preceding shape for visiting back timber is fitted
Close in insertion coal seam, the external force applied is small, and local eminence or scaling-off more by a small margin is only produced to rib.
In one embodiment, as shown in Figure 1 and Figure 4, in the operating position of face guard, the top of face guard 3 is avoidance face
33, the avoidance face 33 relative to rib vertical operation face flare, to form avoiding space.In the present embodiment, face is avoided
It is provided with the smooth opening beneficial to face guard.Meanwhile the avoidance face 33 and the bottom surface (inclined-plane) of preceding spy back timber 1 are functionally mutual
Coordinate, the position of rib local eminence is avoided, so as to reach more preferable supporting effect.
In one embodiment, as shown in Fig. 2 along the stretching direction of preceding spy back timber, the preceding width for visiting back timber 1 narrows from the width,
End is pointed.In the present embodiment, the Cat-in resisting force of back timber is visited before can further reducing.
In one embodiment, it is preceding to visit the width of back timber 1 and the preceding width for visiting back timber jack 2 less than set cap.At this
In embodiment, in the width range of set cap, connecting rod can be set in preceding spy back timber jack both sides, for connecting wall supporting
Plate.
In one embodiment, as shown in figure 4, face guard 3 is included at work parallel to the He of wall supporting plate body 31 of the scope of operation
Connecting rod 32 at left and right sides of preceding spy back timber jack, wherein, the connection end of connecting rod 32 and set cap 5 are be hinged.
In the present embodiment, the space of preceding spy back timber jack both sides is make use of effective and reasonablely.In a variant embodiment, connecting rod 32
It is fixedly connected with set cap 5, wall supporting plate body 31 is be hinged with connecting rod 32.In this variant embodiment, connecting rod 32 is fixation
Part, in recovery, preceding spy back timber is located between the connecting rod of both sides, and preceding spy back timber is played a protective role.
In one embodiment, it is three-level release that above-mentioned front-seat pressure relief device is classified release according to roof pressure, wherein, pressing
Power carries out one-level release when reaching 0.80-0.85 times of working resistance, and pressure reaches 1.0-1.05 times of work after the one-level release
Make resistance and constantly carry out two level release, reaching 1.3-1.35 times of working resistance in two level release downstream pressure carries out three-level release.
In the present embodiment, classification is controlled according to the magnitude relationship between roof weighting and the working resistance of bracket upright post
Release, and one-level release occur not up to bracket upright post working resistance (i.e. 0.8-0.85 working resistances, now beyond
The normal support pressure limit of bracket upright post, is generally defined in below 0.7 times of working resistance) when, play buffering antihypertensive effect.
In one embodiment, as shown in fig. 6, above-mentioned front-seat pressure relief device or heel row pressure relief device are included in main release oil circuit
The first sequence valve, the second sequence valve and the 3rd sequence valve of upper sequential concatenation, it is additionally included in after first sequence valve and institute
State the first pressure-relief valve of main release oil communication, unloaded after second sequence valve with the second of the main release oil communication
Pressure valve, the 3rd pressure-relief valve after the 3rd sequence valve with the main release oil communication, wherein, first sequence valve
Opening pressure be equal to 0.80-0.85 times of working resistance of hydraulic vertical prop, the Opening pressure of second sequence valve is equal to hydraulic pressure
1.0-1.05 times of working resistance of column, the Opening pressure of the 3rd sequence valve be equal to hydraulic vertical prop 1.3-1.35 times work
Resistance, the Opening pressure of first pressure-relief valve, the second pressure-relief valve and the 3rd pressure-relief valve work for 0.1-0.3 times of hydraulic vertical prop
Resistance.
In the present embodiment, three-level relief arrangement automatic classification release, each pressure-relief valve operating pressure is small, and release action can
Leaning on, the pressure-relief valve of the higher unlatching of roof pressure is more, and off-load amount is bigger, off-load rapid reaction, to a certain extent (such as not
During more than 3 times of working resistances) avoid pressure rack, the quick-fried problem of pressure.Compared with prior art, unloaded without additionally being opened up on cylinder wall
Lotus aperture, compared with two-stage unloading, off-load is more reliable.In a hydraulic support, the Opening pressure of the first sequence valve is 35MPa,
The Opening pressure of second sequence valve is 40MPa, and the 3rd sequence valve is 45MPa.
In one embodiment, above-mentioned three-level pressure relief device is integrated liquid pressure valve, only including an import P and an oil return
Mouth T, simplify pipeline connection installation.
In the variant embodiment of the embodiment shown in Fig. 6, using two-stage unloading, eliminate the second sequence valve and second and unload
Pressure valve, pressure unloading are constant.
In one embodiment, front-seat bracket upright post uses the pressure relief device of 3 grades of releases, and heel row bracket upright post is unloaded using 2 grades
The pressure relief device of pressure.
3 control method for illustrating hydraulic support of the present invention below in conjunction with the accompanying drawings：
After coal mining machine roller coal cutting terminates, bracket upright post is reclaimed, with drag conveyor and advancing jack towing bracket
Integral forward lead, the top plate that immediate support newly exposes；Subsequent lift boom column, supporting support back timber, and utilize advancing jack
Drag conveyor and coal-winning machine reach are promoted, completes Bracing Process of once mining.When roof weighting is larger, pressure exceeds
After 35MPa, the first sequence valve and the first pressure-relief valve that threshold value is 35MPa can be opened actively, reduce emulsion pressure, unload in time
Pressure, bracket upright post is withdrawn, reduces support, prevent and treat hydraulic support pushed down, be simultaneously emitted by early warning, remind operating personnel to take counter-measure,
After pressure-relief valve is opened, emulsify that the space enlargement amount of sap cavity is smaller, and emulsion pressure drop is limited, support still has very big branch
Support force, working face can normal back production, after roof weighting is bigger, threshold value be 40MPa the second sequence valve corresponding to second unload
3rd pressure-relief valve corresponding to pressure valve or the 3rd sequence valve that threshold value is 45MPa is opened, and the further release of pillar, protects liquid in time
Press support.
As shown in figure 5, the seam mining means of defence of class soil property coal comprises the following steps：
S11, coal mining machine roller exploitation rib reach the hydraulic support position when, reclaim the hydraulic support
Preceding spy back timber and face guard, carry out coal cutting；
The bracket upright post of the hydraulic support is reclaimed in S13, coal cutting after terminating, led using drag conveyor and advancing jack
Draw hydraulic support integral forward lead, then rise the bracket upright post, support the set cap；
Back timber jack is visited before S15, unlatching forces the preceding back timber of visiting to insert rib, and opens face guard jack and beat
Open face guard；And
S17, drag conveyor and coal-winning machine reach are promoted using advancing jack, wait exploitation next time.
According to the seam mining means of defence of the present invention, after the coal cutting of coal mining machine roller 11 terminates, bracket upright post 6, profit are reclaimed
With drag conveyor 9 and the towing bracket integral forward lead of advancing jack 8, subsequent lift boom column 6, supporting support back timber 5, open
Open face guard jack 4, promote preceding back timber of visiting to insert rib, then open face guard 3, the top plate of completely isolated new exposure reaches
Prevent the purpose of roof fall；Finally drag conveyor 9 and coal-winning machine 10 is promoted to move forward using advancing jack 8, completion is once mined
Bracing Process.
The present invention has given full play to the wall supporting and support action of hydraulic support, prevents that " piece, emit, leak " occurs in recovery process
The accident kept the safety in production Deng harm, reach the purpose of the safe and efficient back production of class soil property coal working face.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (6)
1. a kind of hydraulic support, including bracket base, set cap, advancing jack, face guard and face guard jack,
Bracket upright post, the bracket upright post is between set cap and bracket base, including front-seat bracket upright post and heel row branch erect
Post, it is characterised in that also include preceding spy back timber, preceding spy back timber jack, the preceding disposing set in the front-seat bracket upright post
Pressure device and the heel row pressure relief device set in the rear in row's bracket upright post, wherein, visit back timber before described and be located at the branch
The front of frame back timber, flexible by the preceding spy back timber jack control, the top surface that back timber is visited before described is horizontal plane, and bottom surface is oblique
Face, along the stretching direction of preceding spy back timber, for the preceding thickness for visiting back timber by thick thinning, end is pointed；Back timber is visited before described in supporting
Inserted during operation in rib；The front-seat bracket upright post is connected by front-seat pressure relief device with emulsion box, the heel row support
Column is connected by heel row pressure relief device with the emulsion box, and the front-seat pressure relief device and heel row pressure relief device are separate
Ground release, and the front-seat pressure relief device and heel row pressure relief device are classification pressure relief device.
2. a kind of hydraulic support according to claim 1, it is characterised in that the front-seat pressure relief device is that three-level unloads press fitting
Put, including with the first sequence valve of sequential series, the second sequence valve and the 3rd sequence valve on main release oil circuit, be additionally included in
After first sequence valve with the first pressure-relief valve of the main release oil communication, after second sequence valve with it is described
Second pressure-relief valve of main release oil communication, the 3rd release after the 3rd sequence valve with the main release oil communication
Valve, wherein, the Opening pressure of first sequence valve is equal to 0.80-0.85 times of working resistance of hydraulic vertical prop, and described second is suitable
The Opening pressure of sequence valve is equal to 1.0-1.05 times of working resistance of hydraulic vertical prop, and the Opening pressure of the 3rd sequence valve is equal to liquid
1.3-1.35 times of working resistance of column is pressed, the Opening pressure of first pressure-relief valve, the second pressure-relief valve and the 3rd pressure-relief valve is
0.1-0.3 times of working resistance of hydraulic vertical prop.
3. a kind of hydraulic support according to claim 1, it is characterised in that the face guard (3) is included in supporting operation
When parallel to the wall supporting plate body (31) in rib face and positioned at the preceding connecting rod (32) visited at left and right sides of back timber jack (2),
Wherein, the connecting rod (32) includes the connection end being hinged with the set cap (5).
4. the hydraulic support control method described in a kind of claim 2, it is characterised in that make the front-seat pressure relief device and described
The release independently of each other of heel row pressure relief device, and release is classified according to roof weighting, pass through front-seat release when roof weighting
Device and/or heel row pressure relief device automatic classification off-load, to reduce the front and/or rear of set cap height, to prevent from pressing
Frame.
5. hydraulic support control method according to claim 4, it is characterised in that the front-seat pressure relief device is according to top plate
Pressure classification release is three-level release, wherein, one-level release is carried out when pressure reaches 0.80-0.85 times of working resistance, in institute
State pressure after one-level release and reach 1.0-1.05 times of working resistance and constantly carry out two level release, reach in two level release downstream pressure
1.3-1.35 working resistance carries out three-level release again.
A 6. species soil property coal seam mining means of defence, it is characterised in that use is according to any one of claim 1-3 hydraulic pressure
Support, the means of defence include：
Step 1：When coal mining machine roller exploitation rib reaches the hydraulic support position, the hydraulic support is reclaimed
Preceding spy back timber and face guard, carry out coal cutting；
Step 2: the bracket upright post of the hydraulic support is reclaimed in coal cutting after terminating, led using drag conveyor and advancing jack
Draw hydraulic support integral forward lead, then rise the bracket upright post, support the set cap；
Step 3: back timber jack is visited before opening forces the preceding spy back timber insertion rib, and open face guard jack and beat
Open face guard；And
Step 4：Drag conveyor and coal-winning machine reach are promoted using advancing jack, waits exploitation next time.
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| WO2018094705A1 (en) * | 2016-11-25 | 2018-05-31 | 安徽理工大学 | Hydraulic support frame, and hydraulic support control method |
| CN110671141A (en) * | 2019-10-28 | 2020-01-10 | 陕西开拓建筑科技有限公司 | Hydraulic support for separate mining and transportation mining of thin coal seam and mining method |
| CN114017088B (en) * | 2021-11-01 | 2023-12-22 | 国能神东煤炭集团有限责任公司 | Hydraulic support with side protection mechanism |
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| DE2917609C2 (en) * | 1979-05-02 | 1985-12-19 | Gewerkschaft Eisenhütte Westfalia, 4670 Lünen | Device for controlling the pre-pledging caps of a walking support depending on the progress of the dismantling |
| CN101839142A (en) * | 2010-05-31 | 2010-09-22 | 三一重型装备有限公司 | Hydraulic support |
| CN101892856B (en) * | 2010-07-03 | 2012-07-25 | 霍州煤电集团有限责任公司 | Special hydraulic support for underground filling coal mining of coal mine |
| CN202596763U (en) * | 2012-05-28 | 2012-12-12 | 四川省煤炭产业集团有限责任公司 | Fully-mechanized hydraulic support for steep coal face crossing fault |
| CN204703940U (en) * | 2015-04-30 | 2015-10-14 | 彭帅 | The anti-wall caving hydraulic support of new-type high working face |
| CN206174981U (en) * | 2016-11-25 | 2017-05-17 | 安徽理工大学 | Hydraulic support |
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