CN104453970B - Advanced hydraulic support is non-waits strong supporting control method - Google Patents
Advanced hydraulic support is non-waits strong supporting control method Download PDFInfo
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- CN104453970B CN104453970B CN201410651503.5A CN201410651503A CN104453970B CN 104453970 B CN104453970 B CN 104453970B CN 201410651503 A CN201410651503 A CN 201410651503A CN 104453970 B CN104453970 B CN 104453970B
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- hydraulic support
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- support
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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
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
- E21D23/26—Hydraulic or pneumatic control
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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
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
Abstract
The invention discloses a kind of strong supporting control method such as non-considering ahead work face crossheading stress distribution law and roof condition.Advanced hydraulic support of the present invention is divided into many groups, controls in groups, and often group adopts different first support intensity, reduces successively from work towards support intensity at the beginning of rib direction.Often organizing and arrange adjustable compression release valve or adjustable overflow valve between the column pilot operated check valve of advanced hydraulic support and reversal valve, pressure is not more than pump station pressure, and occurrence can adjust with top board integrity situation in real time according to manifesting of exploitation process advanced ore deposit pressure.The non-of present invention proposition waits strong supporting control method can improve the advanced hydraulic support adaptability to back country rock room and time Changing Pattern, realize the supporting pattern of low setting load and big working resistance, reduce because repeatedly supporting the destruction to top board, provide safeguard for coal resources safety high-efficiency mining.
Description
Technical field
The present invention relates to a kind of advanced crossheading roof timbering determination method for parameter of fully-mechanized mining working, be specifically related to the non-strong control method such as grade of advanced hydraulic support group setting load segmentation.
Background technology
Before setting forth technical background, first the implication of following four vocabulary is described.
Setting load: column is by pump pressure to the Active support power of top board, and bigger setting load can make column comparatively fast reach working resistance, reduces the amount of crushing, it is prevented that early stage peels off.
Just support intensity: support supports intensity at the beginning of the setting load that unit are provides is called.
Working resistance: during support normal operation, the maximum support power that top board is produced is called working resistance, and after column specification and quantity are determined, working resistance depends on the pressure set points of column relief valve.
Supporting intensity: the working resistance that unit are is provided by support is called supporting intensity.
Within the scope of the advanced 20m of China's coal-mine safety code fully-mechanized mining working, crossheading needs to carry out advance support；Along with the increasing of mining rate and the increase of deep complicated seam exploitation ratio are big, a lot of work surfaces actual advance support far super 20m of distance.At present, automatic moving type advanced hydraulic support replaces the mode that individual prop joins metal hinge top beam to become the main way of advance support gradually.It is different from face condition, it is longer that advanced crossheading props up across pitch supporting distance, it is generally divided into plastic zone, higher-pressure region and voltage stabilizing district from work surface entity coal side direction, but advanced hydraulic support supporting intensity still continues to use the theory of working surface hydraulic support when determining, all adopt identical first support intensity and supporting intensity in whole supporting segment limit, thus bring following impact.
(1) frame reach need to drop in the working method of roof destruction advanced hydraulic support repeatedly, and excessive setting load aggravation roof destruction, at distance work surface section farther out because needing more number of times to support, roof cracking is particularly evident.
(2) excessively supporting is in the good colliery of roof condition, and most time inner column pressure for hydraulic pressure, does not namely reach setting load state much smaller than pumping plant.For improving the supporting intensity of work surface, current pump station pressure is continuously increased, and Part Coal Mine pump pressure is increased to 37.5MPa by 31.5MPa, and excessive setting load is to more strong to the disturbance of advanced top board.
(3) regulate difficulty namely to stop the mode of liquid with the experience of underground labour control setting load, poor controllability by connecing top.
Accordingly, it would be desirable to according to the different sections of advanced crossheading pressure and time the distribution of exploitation process Pressure behaviour, carry out the non-grade of segmentation and control by force, and the method being easy to manipulation is provided.
Summary of the invention
Technical problem: the present invention is directed to the roof destruction and excessive turbulence problem that adopt single setting load to bring within the scope of the whole supporting of crossheading advanced hydraulic support of work at present face, non-strong supporting principle of Denging proposed, and by hydraulic system improve a kind of Discrete control is provided realize method.
Technical scheme: in advance support section, is divided into many groups by before and after advanced hydraulic support, 3 groups and above for excellent, and the column pattern often organized is consistent, and supporting area and column number ratio are close, can basically reach and support intensity at the beginning of waiting under identical liquid supply pressure.A left and right pack support side by side is controlled by with a piece of reversal valve, an adjustable pressure-reducing valve is increased between reversal valve and often between group column cavity of resorption hydraulic control one-way valve, reasonably value is set according to advanced pressure manifestation situation, it is said that in general, the pressure set points of air relief valve gradually reduces with increasing from work surface distance.The value that relief valve is set up remains unchanged, the working resistance such as maintenance, and working resistance keeps higher value as far as possible.
The plastic zone of next-door neighbour's work surface and higher-pressure region are by back production disturbance is big, roadway deformation is violent, suitably increase setting load to prevent sinking absciss layer that directly top is too early, slow down and crush speed and increase its stability, because of the roof destruction that big setting load causes, goaf can be thrown to the propelling of work surface within a short period of time, affect relatively small.From work surface section farther out, advanced stress and all being successively decreased by back production strength of turbulence, because repeatedly moving support that frame needs often, therefore suitably reduces setting load, can reduce roof destruction while guarantee supporting effect.When whole crossheading is hit pressure influence, sinking along with top board, the fluid pressure of column cavity of resorption gradually rises, automatic moving type advanced hydraulic support is also increasing to the support force of top board, presents increasing resistance state, until along with the further increase of roof pressure, the fluid pressure of column cavity of resorption is more and more higher, when being increased to set pressure for safety valve, the constant-resistance state of overflow opened by relief valve, has namely reached working resistance.Big working resistance contributes to opposing surge, safeguards that tunnel is complete.The pressure of safety valve setting does not do and reduces, and still keeps big working resistance, and therefore relatively the low setting load of distal section will not bring the obvious reduction of supporting effect.
The present invention has an advantage that under the premise that (1) does not change working resistance, it is possible to realize low setting load, does not affect the reduction advanced hydraulic support destruction to top board under the premise of supporting effect；(2) to existing advanced hydraulic support without any change, only in often organizing column control loop, increase an air relief valve, both can design application on advance timbering new, also allow for the transformation of existing advance timbering group；(3) in exploitation process, Discrete control setting load value can be possible not only to, also can adjust, according to the change of pressure, the pressure set points often organizing advanced hydraulic support air relief valve in good time, it is achieved control with dynamic the coordination in groups of the advanced section stress distribution of crossheading.
Accompanying drawing explanation
Fig. 1 is the advanced hydraulic support group layout drawing of the present invention.
Fig. 2 is the hydraulic control system schematic diagram of Fig. 1 central post.
In figure, 1-1,1-2,1-3: advanced hydraulic support group I, advanced hydraulic support group II, advanced hydraulic support group III；2: column；3: push-and-pull jack；4: regulate jack；5: hydraulic control one-way valve；6: relief valve；7: reversal valve；8-1,8-2: adjustable pressure-reducing valve, adjustable relief valve.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 show certain mine working face air return way advanced hydraulic support layout drawing, it is a kind of advance support rack group being made up of three groups of advanced hydraulic pressure framves, left and right two framves side by side are one group, are overall by regulating jack 4 connection, and advance support distance (to work surface distance) is 30m.In the present embodiment, advanced hydraulic support group I1-1 is close to work surface, and advanced hydraulic support group II1-2 is middle frame, and advanced hydraulic support group III1-3 is file leader's frame, is provided with push-and-pull jack 3 between two adjacent groups advanced hydraulic support.Described three groups of advanced hydraulic supports adopt the column 2 of same types and quantity.
As shown in Figure 2, often group advance timbering column adopts identical hydraulic control system, four columns 2 of one group of advanced hydraulic support are controlled by a piece of three position four-way directional control valve 7, every column 2 is equipped with hydraulic control one-way valve 5, the control mouth of hydraulic control one-way valve 5 is connected with column rod chamber, and column 2 cavity of resorption is connected to relief valve 6.Hydraulic control system of the present invention, is characterized in that being in series with adjustable pressure-reducing valve 8-1 between hydraulic control one-way valve 5 and reversal valve 7；Hydraulic control system Stress control another program of the present invention is adjustable relief valve 8-2 in parallel between hydraulic control one-way valve 5 with reversal valve 7.
Work surface pump station pressure is 31.5MPa, according to the observation of winnning-off pressure manifestation and roof conditions, respectively the air relief valve pressure of advanced hydraulic support group I, advanced hydraulic support group II and advanced hydraulic support group III is preset as 25MPa, 20MPa and 15MPa.Propelling according to work surface and the supporting effect of advanced hydraulic support, can be adjusted in advance of the face process, at any time to adapt to the change of roof conditions.In liter frame process, when the back timber of advanced hydraulic support contacts top board, until when the fluid pressure of column cavity of resorption gradually rises to adjustable pressure-reducing valve or adjustable relief valve setting pressure, stopping feed flow, hydraulic control one-way valve is closed immediately, it is achieved the advance timbering first support strength control to top board.The size of advanced hydraulic support setting load depends on air relief valve or overflow valve valve operating pressure, column cylinder diameter and column quantity, by the control realization in groups of adjustable compression release valve or overflow valve low setting load accurately control and segmentation is non-etc. just supports supporting by force.
Claims (1)
1. an advanced hydraulic support strong supporting control method such as non-grade, it is characterized in that advanced hydraulic support fore-and-aft direction is divided into many groups to be controlled in advance support section, determine that often group advanced hydraulic support adopts different first support intensity according to advanced crossheading stress distribution law with roof cracking situation, according to crossheading pressure manifestation advanced in exploitation process, often organizing series connection adjustable compression release valve between advanced hydraulic support column and corresponding reversal valve, or often organizing parallel-connection adjustable overflow valve between advanced hydraulic support column and corresponding reversal valve, the first support dynamic changes of strength of advanced hydraulic support is adjusted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410651503.5A CN104453970B (en) | 2014-11-17 | 2014-11-17 | Advanced hydraulic support is non-waits strong supporting control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410651503.5A CN104453970B (en) | 2014-11-17 | 2014-11-17 | Advanced hydraulic support is non-waits strong supporting control method |
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| Publication Number | Publication Date |
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| CN104453970A CN104453970A (en) | 2015-03-25 |
| CN104453970B true CN104453970B (en) | 2016-07-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105041357B (en) * | 2015-08-20 | 2017-08-15 | 天地科技股份有限公司 | Single track handling tail becomes first formula advance support system |
| CN105386784A (en) * | 2015-12-07 | 2016-03-09 | 太原科技大学 | Liquid supply loop of hydraulic supports and control method |
| CN109854290A (en) * | 2019-03-07 | 2019-06-07 | 辽宁工程技术大学 | Advanced hydraulic support transverse and longitudinal is based on the non-equal strong supportings control method of fourier function |
| CN110410115B (en) * | 2019-07-22 | 2020-11-17 | 天地科技股份有限公司 | Self-adaptive control system for pressure of stand column |
| CN111042848A (en) * | 2019-12-26 | 2020-04-21 | 山西晋煤集团技术研究院有限责任公司 | Fully-mechanized coal mining face haulage roadway advance support device |
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| CN101205810B (en) * | 2007-12-13 | 2011-06-29 | 中煤北京煤矿机械有限责任公司 | Mining hydraulic support self-boosting system |
| DE202009011083U1 (en) * | 2009-09-29 | 2011-02-24 | Bucyrus Europe Gmbh | Schreiteinrichtung and Schildausbaugestell hereby |
| CN101864972A (en) * | 2010-06-04 | 2010-10-20 | 中煤北京煤矿机械有限责任公司 | Small supporting point full-protection-type tunnel bracket and supporting method thereof |
| CN103821547B (en) * | 2014-03-21 | 2016-08-24 | 洛阳理工学院 | A kind of shock resistance large deformation anchor rod |
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Inventor after: Wang Guofa Inventor after: Liu Wei Inventor after: Zhang Desheng Inventor after: Ren Huaiwei Inventor after: Niu Yanqi Inventor after: Zhao Guorui Inventor after: Wen Zhiguo Inventor after: Du Yibo Inventor after: Wang Junjie Inventor after: Li Jifeng Inventor before: Wang Guofa Inventor before: Zhang Desheng Inventor before: Ren Huaiwei Inventor before: Niu Yanqi Inventor before: Zhao Guorui Inventor before: Wen Zhiguo Inventor before: Du Yibo Inventor before: Liu Wei |
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