CN206174981U - Hydraulic support - Google Patents
Hydraulic support Download PDFInfo
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- CN206174981U CN206174981U CN201621275816.6U CN201621275816U CN206174981U CN 206174981 U CN206174981 U CN 206174981U CN 201621275816 U CN201621275816 U CN 201621275816U CN 206174981 U CN206174981 U CN 206174981U
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- pressure
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Abstract
The utility model provides a method of hydraulic support and hydraulic support control, this hydraulic support includes support base, back timber, advancing jack, protects group's board, protects group's board jack, support stand, and the support stand includes preceding, back row support stand, and its characterized in that still includes preceding spy back timber, preceding spy back timber jack, preceding, back row pressure -relief device, and wherein, preceding spy back timber is located the place ahead of support back timber, and is flexible by preceding spy back timber jack control, inserts in the rib when strutting the operation, front -seat support stand is through front -seat pressure -relief device and emulsion case intercommunication, back row support stand pass through back row pressure -relief device with emulsion case intercommunication, front -seat pressure -relief device and back row pressure -relief device mutual independence ground release to preceding, back row pressure -relief device is hierarchical pressure -relief device. The utility model discloses to class soil property coal, visit the back timber before utilizing and provide effectual working space for protecting group's board, be favorable to hydraulic support to protect opening completely of group's board, exert hydraulic support's backplate effect fully, and then improve 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, long-term specific geology to define under mechanical condition it is similar to loess
Physics classroom teaching, this broken, the loose coal body like the non-soil of soil, is class soil property coal.
The easy wall caving unstability of rib in class soil property coal work surface mining process, the stability problem of rib seriously constrains 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 work surface increased face guard, but after coal-winning machine coal cutting,
New exposed top easily inbreak, the coal and rock of inbreak is deposited in rib front, reduces the space in front of hydraulic support, causes
Face guard is difficult to fully open, and the wall supporting performance of support is not in full use, and supporting effect is not also obvious, it is impossible 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 acting on the pressure on support and being very big, if can not release in time, easily cause wearing for support
Bottom even kills, and causes the advance of the face to be stagnated, and has a strong impact on production.
It is many 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 recovery process in rib
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 lead 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.
For this purpose, 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 is located between set cap and bracket base including front
Row's bracket upright post and heel row bracket upright post, it is characterised in that characterized in that, also include front spy back timber, front spy back timber jack,
The front-seat pressure relief device arranged in the front-seat bracket upright post and the heel row release for arranging setting in bracket upright post in the rear
Device, wherein, the front back timber of visiting is stretched positioned at the front of the set cap by the front spy back timber jack control, and
And insert in rib in supporting operation；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 front back timber of visiting is spade-type.
Further, one end that back timber jack is visited before above-mentioned is fixedly connected with set cap, the other end and front 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, width of the width of above-mentioned front spy back timber and front spy back timber jack less than set cap.
Further, above-mentioned face guard visits back timber thousand including wall supporting plate body operationally parallel to the scope of operation and 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 of the close front spy back timber bottom surface of above-mentioned face guard is provided with avoidance face, wherein, face is avoided in shield
Formed and rib between during side board supporting operation and avoid space.
Further, the above-mentioned front bottom surface for visiting back timber is inclined-plane, is 5 ° -10 ° with the angle of horizontal plane.
Further, the front-seat pressure relief device be 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, are additionally included in after first sequence valve and unload 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
State after the 3rd sequence valve with the 3rd pressure-relief valve of the main release oil communication, 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 the 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 a further aspect in the 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, when roof weighting by front row
Pressure relief device and/or heel row pressure relief device automatic classification off-load reducing the front and/or rear height of set cap, in case
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 grades of releases are constantly carried out, reaching 1.3-1.35 times of working resistance in two grades of release downstream pressure carries out three-level release.
According to a further aspect in the 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 is comprised the following steps：Rib is exploited in coal mining machine roller
When reaching the hydraulic support position, the front spy back timber and face guard of the hydraulic support is reclaimed, carry out coal cutting；Coal cutting is tied
Shu Suihou reclaims the bracket upright post of the hydraulic support, before drag conveyor and advancing jack traction hydraulic support entirety
Move, subsequently rise the bracket upright post, support the set cap；Back timber jack is visited before opening forces the front 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 devising above set cap leading portion, face guard, after coal-winning machine coal cutting, front spy back timber
The new exposed top board of supporting can be in time stretched out under the promotion of front spy back timber jack, roof collapse is prevented, it is ensured that hydraulic pressure
Space between support and rib, is that face guard improves effective work space, is conducive to fully opening for side protection plate of hydraulic support,
The backplate effect of hydraulic support is fully played, the stability of rib is improved.
The front end and/or rear end of set cap of the present invention independently reduces height in roof weighting, and according to top board
Pressure classification release, so as to play a part of blood pressure lowering buffering, to prevent inclination and the pressure rack of support.
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.
Description of the drawings
The Figure of description for constituting the part of the application is used for providing a further understanding of the present invention, and the present invention's shows
Meaning property embodiment and its illustrated for explaining the present invention, does not constitute 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, front spy back timber；2nd, front 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.
Specific 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.Below with reference to the accompanying drawings and in conjunction with the embodiments describing the present invention in detail.
Fig. 1 to Fig. 4 shows some embodiments of the 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 located between set cap and bracket base, bag
Include front-seat bracket upright post and heel row bracket upright post.Hydraulic support is also including front spy back timber 1, front spy back timber jack 2, before described
The front-seat pressure relief device arranged in row's bracket upright post and the heel row pressure relief device for arranging setting in bracket upright post in the rear；Its
In, it is front to visit the front that back timber 1 is located at set cap 5, control to stretch by front spy back timber jack 2, and use in supporting operation
In insertion 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 is connected with the emulsion box, the front-seat pressure relief device and the release independently of each other of heel row pressure relief device,
And the front-seat pressure relief device and heel row pressure relief device are classification pressure relief device.
Wherein, front one end of spy back timber jack 2 is connected with set cap 5, and the other end is connected with front spy back timber 1, front
Spy back timber jack 2 stretches out spy back timber 1 before can promoting and moves 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 stretches out can open face guard 3, and bracket upright post 6 is located at set cap 5 and props up
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 devising above set cap leading portion, face guard, after coal-winning machine coal cutting, front spy back timber
The new exposed top board of supporting can be in time stretched out under the promotion of front spy back timber jack, roof collapse is prevented, it is ensured that hydraulic pressure
Space between support and rib, is that face guard improves effective work space, is conducive to fully opening for side protection plate of hydraulic support,
The backplate effect of hydraulic support can be to greatest extent played, the stability of rib is improved.
In one embodiment, as shown in Fig. 2 front spy back timber 1 is spade-type.Preferably, the front top surface 1a for visiting back timber 1 is level
Face, bottom surface 1b is inclined-plane, and along the direction of stretching out of front spy back timber 1, the thickness of front spy back timber 1 is thinning by thickness, and end is pointed.It is more excellent
Selection of land, the oblique angle of the bottom surface 1b of front spy back timber between 5 ° -10 °, such as 6 °.In the present embodiment, the front shape for visiting back timber is fitted
In closing insertion coal seam, the external force for being applied is little, 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 avoids space relative to the vertical operation face flare of rib to be formed.In the present embodiment, face is avoided
It is provided with the smooth opening beneficial to face guard.Meanwhile, the avoidance face 33 is functionally mutual with the bottom surface (inclined-plane) of front spy back timber 1
Coordinate, avoid the position of rib local eminence such that it is able to reach more preferable supporting effect.
In one embodiment, as shown in Fig. 2 stretching out direction along front spy back timber, the width of front spy 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 front to visit the width of back timber 1 and the front width for visiting back timber jack 2 less than set cap.At this
In embodiment, in the width range of set cap, front spy back timber jack both sides can arrange connecting rod, for connecting wall supporting
Plate.
In one embodiment, as shown in figure 4, face guard 3 is included operationally parallel to the He of wall supporting plate body 31 of the scope of operation
Positioned at the connecting rod 32 of the front spy back timber jack left and right sides, wherein, connection end and the set cap 5 of connecting rod 32 are hinged.
In the present embodiment, the space of front 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 hinged with connecting rod 32.In this variant embodiment, connecting rod 32 is fixation
Part, when reclaiming, front spy back timber is located between the connecting rod of both sides, and front 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, in pressure
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
Making resistance constantly carries out two grades of releases, and reaching 1.3-1.35 times of working resistance in two grades of release downstream pressure carries out three-level release.
In the present embodiment, according to the magnitude relationship between roof weighting and the working resistance of bracket upright post come control classification
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 hypotensive 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
First sequence valve of upper sequential concatenation, the second sequence valve and the 3rd sequence valve, are additionally included in after first sequence valve and institute
State the first pressure-relief valve of main release oil communication, unload with the second of the main release oil communication after second sequence valve
Pressure valve, after the 3rd sequence valve with the 3rd pressure-relief valve of 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 works equal to 1.3-1.35 times of hydraulic vertical prop
Resistance, the Opening pressure of first pressure-relief valve, the second pressure-relief valve and the 3rd pressure-relief valve works 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 little, and release action can
Lean on, the pressure-relief valve of the higher unlatching of roof pressure is more, and off-load amount is bigger, off-load reaction is quick, to a certain extent (such as not
During more than 3 times of working resistances) avoid pressure rack, press quick-fried problem.Compared with prior art, unload without the need for additionally opening 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 the 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, simplifies pipeline connection and installs.
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 is constant.
In one embodiment, front-seat bracket upright post adopts the pressure relief device of 3 grades of releases, heel row bracket upright post to unload using 2 grades
The pressure relief device of pressure.
3 illustrate the control method of 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 new exposed top board of immediate support；Subsequent lift boom column, supporting support back timber, and utilize advancing jack
Drag conveyor and coal-winning machine reach are promoted, Bracing Process of once mining is completed.When roof weighting is larger, pressure exceeds
After 35MPa, threshold value can be opened actively for first sequence valve and the first pressure-relief valve of 35MPa, reduce emulsion pressure, be unloaded in time
Pressure, withdraws bracket upright post, reduces support, prevents and treats hydraulic support pushed down, is simultaneously emitted by early warning, reminds operating personnel to take counter-measure,
After pressure-relief valve is opened, the space enlargement amount of emulsifying sap cavity is less, and emulsion pressure drop is limited, and support still has very big
Support force, work surface can normally back production, after roof weighting is bigger, threshold value is unloaded for second sequence valve corresponding second of 40MPa
Pressure valve or threshold value are opened for corresponding 3rd pressure-relief valve of the 3rd sequence valve of 45MPa, and the further release of pillar protects in time liquid
Pressure support.
As shown in figure 5, the seam mining means of defence of class soil property coal is comprised the following steps：
S11, when coal mining machine roller exploitation rib reaches the hydraulic support position, reclaim the hydraulic support
Front 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, subsequently rise the bracket upright post, support the set cap；
S15, open before visit back timber jack force it is described before visit back timber insertion rib, and open face guard jack and beat
Open face guard；And
S17, using advancing jack promote drag conveyor and coal-winning machine reach, wait next time exploitation.
Seam mining means of defence of the invention, after the coal cutting of coal mining machine roller 11 terminates, reclaims bracket upright post 6, profit
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 is opened
Open face guard jack 4, promote front back timber of visiting to insert rib, then open face guard 3, completely isolated new exposed top board reaches
Prevent the purpose of roof fall；Finally promote drag conveyor 9 and coal-winning machine 10 to move forward using advancing jack 8, complete once to mine
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
Deng the accident of harm safety in production, the purpose of the safe and efficient back production of class soil property coal work surface is reached.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (3)
- A kind of 1. hydraulic support, including bracket base, set cap, advancing jack, face guard and face guard jack, Bracket upright post, the bracket upright post is located between set cap and bracket base, including front-seat bracket upright post and heel row are erected Post, it is characterised in that characterized in that, also including front spy back timber, front spy back timber jack, setting in the front-seat bracket upright post The front-seat pressure relief device put and the heel row pressure relief device for arranging setting in bracket upright post in the rear, wherein, the front spy back timber It is flexible by the front spy back timber jack control positioned at the front of the set cap, and insert rib in supporting operation In；The front-seat bracket upright post is connected by front-seat pressure relief device with emulsion box, and the heel row bracket upright post is by rear disposing Pressure device is connected with the emulsion box, the front-seat pressure relief device and the release independently of each other of heel row pressure relief device, and institute State front-seat pressure relief device and heel row pressure relief device is 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 unloaded for three-level and press-fited 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, after the 3rd sequence valve with the 3rd release of 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 pressure column, 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 rib face wall supporting plate body (31) and positioned at it is described it is front visit back timber jack (2) left and right sides connecting rod (32), Wherein, the connecting rod (32) includes the connection end being hinged with the set cap (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621275816.6U CN206174981U (en) | 2016-11-25 | 2016-11-25 | Hydraulic support |
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| CN201621275816.6U CN206174981U (en) | 2016-11-25 | 2016-11-25 | Hydraulic support |
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| CN206174981U true CN206174981U (en) | 2017-05-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437808A (en) * | 2016-11-25 | 2017-02-22 | 安徽理工大学 | Hydraulic frame and control thereof |
| WO2018094705A1 (en) * | 2016-11-25 | 2018-05-31 | 安徽理工大学 | Hydraulic support frame, and hydraulic support control method |
| CN110863848A (en) * | 2019-10-29 | 2020-03-06 | 山西晋城无烟煤矿业集团有限责任公司 | Beam-free end distance telescopic side protection mechanism |
-
2016
- 2016-11-25 CN CN201621275816.6U patent/CN206174981U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437808A (en) * | 2016-11-25 | 2017-02-22 | 安徽理工大学 | Hydraulic frame and control thereof |
| WO2018094705A1 (en) * | 2016-11-25 | 2018-05-31 | 安徽理工大学 | Hydraulic support frame, and hydraulic support control method |
| CN110863848A (en) * | 2019-10-29 | 2020-03-06 | 山西晋城无烟煤矿业集团有限责任公司 | Beam-free end distance telescopic side protection mechanism |
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