CN104453970A - Non-equal-strength supporting control method for fore hydraulic supports - Google Patents
Non-equal-strength supporting control method for fore hydraulic supports Download PDFInfo
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- CN104453970A CN104453970A CN201410651503.5A CN201410651503A CN104453970A CN 104453970 A CN104453970 A CN 104453970A CN 201410651503 A CN201410651503 A CN 201410651503A CN 104453970 A CN104453970 A CN 104453970A
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- 230000008093 supporting effect Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000009826 distribution Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000005336 cracking Methods 0.000 claims description 2
- 230000003750 conditioning effect Effects 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 7
- 239000003245 coal Substances 0.000 abstract description 4
- 238000005065 mining Methods 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract 1
- 239000011435 rock Substances 0.000 abstract 1
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000011218 segmentation Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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 OR ROCK 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a non-equal-strength supporting control method taking the working face fore down-channel stress distribution rule and the top plate condition into consideration. The fore hydraulic supports are divided into multiple groups and controlled in a grouping mode. Different initial supporting strengths are adopted in the groups, and the initial supporting strengths are decreased from the working face to the coal wall in sequence. An adjustable reducing valve or an adjustable overflow valve is arranged between a vertical column hydraulic control one-way valve and a reversing valve of each set of fore hydraulic support, the pressure is not larger than the pressure of a pump station, and the specific value can be adjusted in real time according to the showing of fore mine pressure in the extraction process and the integrity situation of a top plate. According to the non-equal-strength supporting control method, the adaptability of the fore hydraulic supports to the space and time changing rule of the roadway top plate surrounding rock can be improved, the low-initial-supporting-force and large-working-resistance supporting mode is achieved, the damage to the top plate due to repeated supporting is reduced, and the guarantee is provided for safe and efficient mining of coal resources.
Description
Technical field
The present invention relates to a kind of fully-mechanized mining working advanced crossheading roof timbering determination method for parameter, be specifically related to the strong control method of the non-grade of advanced hydraulic support group setting load segmentation.
Background technology
Before elaboration technical background, first the implication of four vocabulary is below described.
Setting load: column is by pump pressure to the active support force of top board, and larger setting load can make column comparatively fast reach working resistance, reduces the amount of crushing, prevents early stage stripping.
Just support intensity: support supports intensity at the beginning of being called the setting load that unit area provides.
Working resistance: when support normally works, be called working resistance to the maximum support power that top board produces, after column specification and quantity are determined, working resistance depends on the pressure set points of column safety valve.
Supporting intensity: support is called supporting intensity to the working resistance that unit area provides.
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 increase of the increasing of mining rate and deep complicated seam exploitation ratio is large, the actual advance support of a lot of work plane is apart from far super 20m.At present, the mode that automatic moving type advanced hydraulic support replaces individual prop to join metal hinge top beam gradually becomes the main way of advance support.Be different from face condition, advanced crossheading props up across pitch supporting apart from longer, plastic zone, higher-pressure region and voltage stabilizing district is generally divided into from work plane 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, bring following impact thus.
(1) frame reach need fall in the working method of roof destruction advanced hydraulic support repeatedly, excessive setting load aggravation roof destruction, and the section far away at distance work plane supports because needing more times number, and 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 plane, current pump station pressure constantly increases, and Part Coal Mine pump pressure increases to 37.5MPa by 31.5MPa, and excessive setting load is to more strong to the disturbance of advanced top board.
(3) mode regulating the difficult experience with underground labour namely to stop liquid by connecing top controls setting load, poor controllability.
Therefore, need according to the different section of advanced crossheading pressure and time exploitation process Pressure behaviour distribution, carry out the non-grade of segmentation and control by force, and the method being convenient to manipulate is provided.
Summary of the invention
Technical problem: the present invention is directed within the scope of the whole supporting of work at present face crossheading advanced hydraulic support the roof destruction and excessive turbulence problem that adopt single setting load to bring, propose non-principle such as strong supporting such as grade, and a kind of implementation method of Discrete control is provided by the improvement of hydraulic system.
Technical scheme: in advance support section, be divided into many groups by before and after advanced hydraulic support, 3 groups and above be excellent, the column pattern often organized is consistent, supporting area and column number ratio close, substantially can reach under identical liquid supply pressure at the beginning of waiting and support intensity.A left and right pack support is side by side controlled by same a slice reversal valve, an adjustable pressure-reducing valve is increased between group column cavity of resorption hydraulic control one-way valve between reversal valve and often, according to advanced pressure manifestation situation setting reasonably value, generally speaking, the pressure set points of reducing valve successively reduces with increasing apart from work plane distance.The value that safety valve is set up remains unchanged, the working resistances such as maintenance, and working resistance keeps higher value as far as possible.
The next-door neighbour plastic zone of work plane and higher-pressure region is large by back production disturbance, roadway deformation is violent, the sinking absciss layer that suitable increase setting load can prevent immediate roof too early, slow down the speed of crushing and increase its stability, because of the roof destruction that large setting load causes, goaf can be thrown within a short period of time with the propelling of work plane, affect relatively little.Apart from work plane section far away, advanced stress and all successively decreasing by back production strength of turbulence, because repeatedly moving support that frame needs often, therefore suitably reducing setting load, can reduce roof destruction while ensureing supporting effect.When whole crossheading is hit pressure influence, along with the sinking of top board, the fluid pressure of column cavity of resorption raises gradually, automatic moving type advanced hydraulic support is also increasing to the support force of top board, presents and increases 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 elevated to set pressure for safety valve, the constant-resistance state of overflow opened by safety valve, namely reaches working resistance.Large working resistance contributes to resisting surge, safeguards that tunnel is complete.The pressure of safety valve setting does not do and reduces, and still keeps large working resistance, and therefore the low setting load of section far away can not bring the obvious reduction of supporting effect.
The present invention has following advantage: under (1) does not change the prerequisite of working resistance, can realize low setting load, reduces the destruction of advanced hydraulic support to top board under not affecting the prerequisite of supporting effect; (2) to existing advanced hydraulic support without any change, only increase a reducing valve often organizing in column control loop, both can design on advance timbering newly and apply, also be convenient to the transformation of existing advance timbering group; (3) can in exploitation process, not only can Discrete control setting load value, also can adjust according to the change of pressure the pressure set points often organizing advanced hydraulic support reducing valve in good time, realize the dynamically cooperation control in groups with the advanced section stress distribution of crossheading.
Accompanying drawing explanation
Fig. 1 is advanced hydraulic support group arrangement diagram 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: safety valve; 6: hydraulic control one-way 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:
Figure 1 shows that certain mine working face air return way advanced hydraulic support arrangement diagram, it is a kind of advance support rack group be made up of three groups of advanced hydraulic pressure framves, left and right two framves are side by side one group, and it is overall for being connected by adjustment jack 4, and advance support distance (to work plane distance) is 30m.In the present embodiment, advanced hydraulic support group I 1-1 is close to work plane, and advanced hydraulic support group II 1-2 is middle frame, and advanced hydraulic support group III 1-3 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 organize advance timbering column and adopt identical hydraulic control system, four columns 2 of one group of advanced hydraulic support are controlled by a slice 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 with safety 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 at control one way valve 5 adjustable relief valve 8-2 in parallel with reversal valve 7 support.
Work plane pump station pressure is 31.5MPa, according to the observation of winnning-off pressure manifestation and roof conditions, respectively the reducing 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.According to the propelling of work plane and the supporting effect of advanced hydraulic support, can adjust at any time in advance of the face process, to adapt to the change of roof conditions.Rising in frame process, when the back timber contact top board of advanced hydraulic support, until when the fluid pressure of column cavity of resorption rises to adjustable pressure-reducing valve or adjustable relief valve setting pressure gradually, stop feed flow, hydraulic control one-way valve is closed immediately, realizes the first support strength control of advance timbering to top board.The size of advanced hydraulic support setting load depends on reducing valve or overflow valve valve operating pressure, column cylinder diameter and column quantity, the accurate control of low setting load and segmentation is non-etc. just supports supporting by force by the control realization in groups of adjustable compression release valve or overflow valve.
Claims (3)
1. advanced hydraulic support is non-waits strong supporting control method, it is characterized in that from winnning-off stress distribution law and roof cracking situation, advanced hydraulic support grouping is controlled, often organize advance timbering and adopt different first support intensity, according to tunnel pressure manifestation in exploitation process, advanced hydraulic support just supports intensity can carry out dynamic conditioning.
2. advanced hydraulic support according to claim 1 is non-waits strong supporting control method, it is characterized in that often organizing between column and corresponding reversal valve being in series with adjustable compression release valve.
3. advanced hydraulic support according to claim 1 is non-waits strong supporting control method, and it is characterized in that often organizing also can parallel-connection adjustable overflow valve between column and corresponding reversal valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
|---|---|---|---|
| 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 true CN104453970A (en) | 2015-03-25 |
| CN104453970B CN104453970B (en) | 2016-07-06 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041357A (en) * | 2015-08-20 | 2015-11-11 | 天地科技股份有限公司 | Monorail hoisting tail-to-head-type 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 |
| CN110410115A (en) * | 2019-07-22 | 2019-11-05 | 天地科技股份有限公司 | A kind of column pressure adaptive regulator control system |
| 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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| CN101205810A (en) * | 2007-12-13 | 2008-06-25 | 中煤北京煤矿机械有限责任公司 | Mining hydraulic support self-boosting system |
| 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 |
| US20120180467A1 (en) * | 2009-09-29 | 2012-07-19 | Bucyrus Europe Gmbh | Advancing assembly and powered shield support herewith |
| CN103821547A (en) * | 2014-03-21 | 2014-05-28 | 洛阳理工学院 | Shockproof large-deformation anchor rod |
-
2014
- 2014-11-17 CN CN201410651503.5A patent/CN104453970B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101205810A (en) * | 2007-12-13 | 2008-06-25 | 中煤北京煤矿机械有限责任公司 | Mining hydraulic support self-boosting system |
| US20120180467A1 (en) * | 2009-09-29 | 2012-07-19 | Bucyrus Europe Gmbh | Advancing assembly and powered shield support herewith |
| 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 |
| CN103821547A (en) * | 2014-03-21 | 2014-05-28 | 洛阳理工学院 | Shockproof large-deformation anchor rod |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041357A (en) * | 2015-08-20 | 2015-11-11 | 天地科技股份有限公司 | Monorail hoisting tail-to-head-type 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 |
| CN110410115A (en) * | 2019-07-22 | 2019-11-05 | 天地科技股份有限公司 | A kind of column pressure adaptive regulator control system |
| 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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| CN104453970B (en) | 2016-07-06 |
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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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