CN1073501A - Hydraulic expansion type anchor stock is prevented the roof fall of coal face wall caving - Google Patents
Hydraulic expansion type anchor stock is prevented the roof fall of coal face wall caving Download PDFInfo
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- CN1073501A CN1073501A CN 91107964 CN91107964A CN1073501A CN 1073501 A CN1073501 A CN 1073501A CN 91107964 CN91107964 CN 91107964 CN 91107964 A CN91107964 A CN 91107964A CN 1073501 A CN1073501 A CN 1073501A
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- hydraulic expansion
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Abstract
The present invention relates to production practice under the coal mine, further is a kind of method that stope prevents the wall caving roof fall.This method is by punching on working face wall or top board, insert hydraulic expansion type anchor stock in boring, the emulsion that utilizes support hydraulic system is as pressure liquid, inject the anchor pole inner chamber through operation valve, high-pressure rubber pipe, impregnator, anchor rod body is expanded, the jam-packed borehole wall, the anchoring coal body reaches the purpose that prevents the roof fall of work plane wall caving.Technology of the present invention is simple, and is easy to operate, do not increase equipment substantially, and saving personnel, time, cost is low, and effect is very remarkable, is the anti-wall caving roof fall efficient ways of coal face.
Description
The present invention relates to production practice under the coal mine, further is a kind of method that stope working surface of coal mines prevents the roof fall of sheet nation.
Utilize chemical method (using polyurethane) to reinforce coal body in the world and prevent the wall caving roof fall, start from early seventies, West Germany colliery.This is a kind of ripe method that prevents to adopt the wall caving roof fall of face coal seam.8 or three years China this technology that begins one's study is successively tested in offices such as opening Luan, Datong District, Xuzhou, Yanzhou, has obtained better effects.Chemical method is reinforced coal body infusion method and two kinds of technologies of wood bolt cartridge bag method.The infusion method will be used special-purpose injection pump, play 40～50 meters dark borings, before pressure injection, also will carry out sealing of hole, will clean specially pump and pipeline after the pressure injection, the space of crossheading or work plane about the installation injection pump will occupy, pressure injection slurries freight volume is big, and injecting paste material is wanted strictness adapted in proportion, operates very complicated, must carry out in the class of stopping production, at least want six people operation, termination of pumping was not cleaned resin in 10 minutes and will be stopped up in pipeline, will wait after the slip casting to reinforce more than 20 minutes just to work.Wood bolt cartridge bag method, operation is also complicated, needs to adorn two kinds of cartridge bags respectively on ground, deposits respectively, storage period, must not be above three months, will transport the down-hole respectively to, two kinds of cartridge bags are alternately sent into boring, and the electricity consumption coal borer adds the wood bolt rotation that socket wrench specially adapted for it drives sharpening then, two kinds of cartridge bags are stirred brokenly mixing back beginning in 3～5 minutes chemical reaction, solidify after 20 minutes and work, the aperture will be with stemming or cotton yarn shutoff, and the intensity of wood bolt is lower.The common drawback of reinforcing the coal body existence with chemical method is that material usage is big, cost is high, complex process.
Hydraulic expansion type pipe anchor pole, or claim expand tube formula anchor pole, be to be processed into the double-deck special-shaped tubular body of rod 1 with seamless steel pipe, the body of rod one end welding upper end cover 2, back-up ring 4 and liquid injecting mouth 3 are gone up in other end welding, and the water hole on the liquid injecting mouth is communicated with body of rod inner chamber.When the body of rod is installed, the liquid injecting mouth of anchor pole rear end is loaded onto impregnator, the water under high pressure that high-pressure hydraulic pump is provided (30MPa) then, send into liquid injecting mouth by impregnator, thereby enter the anchor pole inner chamber,, be out of shape along with the profile of boring in the effect lower beam volume expansion of water under high pressure, produce very big extruding force with hole wall, together the rock anchorage of sheet.In prior art, this anchor pole is the supporting that is used for the tunnel, and the length of using is 1.5m, pipe thickness 2mm.Be not applied to the precedent that coal-face is reinforced rib, prevented the roof fall of rib sheet nation and have.
The objective of the invention is to overcome weak point of the prior art, a kind of technology is simple, easy to operate, cost is low, the new method of the material source anti-rib sheet nation of stope roof fall easily and provide.
For achieving the above object, the present invention can reach by following measure:
On the rib of down-hole stope, hydraulic expansion type anchor stock is inserted in the hole of also can drilling on the top board above the working face wall in boring, chew the pressure liquid that injects high pressure through the fluid injection of anchor pole with impregnator, make the body of rod of anchor pole expand jam-packed borehole wall, anchoring rib or top board.
Purpose of the present invention can also reach by following measure:
The operation valve of hydraulic support as control valve,,, is chewed through the fluid injection of anchor pole and to be injected the anchor pole inner chamber by the high-pressure rubber pipe of changing-over to the operation valve, and the impregnator of high-pressure rubber pipe termination band as high-pressure liquid with the emulsion of support hydraulic system.
The length of hydraulic expansion type anchor stock can expand to 2.0～3.0m, pipe thickness can expand to 1.0～1.8mm.
Compared with the prior art the present invention has following advantage:
1, with hydraulic expansion type pipe anchor pole can anchoring one-tenth be whole well the rib of joints development, prevent the roof fall of stope wall caving effectively, effect is very remarkable.And this anchor pole can not influence coal-winning machine and mine in rib.
2, technology is simple, and is easy to operate, saves time.Only need to use the electric coal drill perforating, need not high-pressure hydraulic pump be installed newly, utilize the operation valve and the pipeline of hydraulic support, only need impregnator of processing, hydraulic expansion type pipe anchor pole just can be installed, do not increase equipment substantially.Because utilize the emulsion fluid injection of hydraulic support, the flow of pumping plant is big, and is more faster than the little water pump feed flow of high pressure of former usefulness, the fluid injection time that an anchor pole is installed was no more than for 10 seconds, did not take the production time substantially.After installing, anchor pole reaches immediately just more than the anchor-hold 80kN.Personnel selection is few, and two people can finish whole operating process.All there are complex process in infusion method, wood bolt cartridge bag method, operation inconvenience, time-consuming problem of taking a lot of work.
3. utilize the emulsion of hydraulic support pipeline system to make the pressure liquid of anchor pole, can make anti-wall caving work very flexible, find that wall caving can install and use at any time.On-the-spot deposit anchor pole, electric coal borer and the impregnator of only needing.Never degenerate in anchor pole long-term storage down-hole.Infusion method, equipment are installed the back important affair and are reinforced earlier, and mobility is little.
4. reinforce the big cost height of coal body material usage with chemical method.Under the same terms, with hydraulic expansion type pipe anchor pole, low 5～10 times of cost.
5. with hydraulic expansion type pipe anchor pole environmentally safe.Use chemical method, as with materials such as Lauxites, penetrating odor is arranged, be corrosive, environment is had certain pollution, operating personnel want wear a pair of spectacles and emgloves, and chemical material splashes on the skin and will in time clean.Also influential to ature of coal.
6. use chemical method, as with polyurethane etc., material is shortage relatively.There is not this type of problem with hydraulic expansion type anchor stock.
The drawing of accompanying drawing is described as follows:
Fig. 1: the structural representation of hydraulic expansion type pipe anchor pole before fluid injection is expanded
Fig. 2: hydraulic expansion type pipe anchor pole is the schematic diagram after the fluid injection expansion in rock
Fig. 3: hydraulic expansion type pipe anchor pole is the schematic diagram after the fluid injection expansion in rib
Fig. 4: hydraulic expansion type pipe anchor pole schematic diagram is installed on working face wall
Fig. 5: hydraulic expansion type pipe anchor pole schematic diagram is installed on the top board above the working face wall
The present invention is described in further detail below in conjunction with drawings and Examples:
Fig. 1 shows the structure of hydraulic expansion type pipe anchor pole.Wherein: the 1-body of rod, 2-holds cover, 3-liquid injecting mouth, 4-back-up ring, 5-anchor dish.Hydraulic expansion type pipe anchor pole external diameter for example is that 29mm, length are 2.5m.Seamless steel pipe with φ 48 * 1.5mm is processed into the double-deck special-shaped tubular body of rod.The length that is suitable for the hydraulic expansion type pipe anchor pole of the anti-sheet nation of stope roof fall can be the scope that 1.8～3.0m, seamless steel pipe pipe thickness can extend to 1mm from 2mm.
Fig. 2 shows the situation after the fluid injection of hydraulic expansion type pipe anchor pole is expanded.Anchor rod body expands, and can produce very big extruding force with hole wall, the jam-packed borehole wall, and be out of shape along with the profile of boring, be crowded with full sections of boring, the rib anchoring of joints development is become whole.The rib anchoring of joints development is become whole.
Fig. 3 shows the situation of hydraulic expansion type pipe anchor pole mounting arrangements on working face wall.Its mounting method and operating procedure are as follows:
1. use electric coal drill above the rib 11 apart from about 0.5 meter on top board, every 1～1.5 meter boring of making a call to a φ 42mm, hole depth is greater than 2.5 meters of rock-bolt lengths, boring is parallel to each other;
2. the plate valve of hydraulic support 10 or rotary valve-at this general designation operation valve 9, extract a union, change the high-pressure rubber pipe 8 of a same diameter, long 20～30 meters termination band impregnators 7, with the operation valve 9 of support as control valve, with the emulsion of hydraulic system pressure liquid as hydraulic expansion type pipe anchor pole, for skyhook ready;
3. allow an end of anchor pole band liquid injecting mouth 3 and back-up ring 4 outside,, insert in the boring then anchor dish 5 on the anchor pole string and bunk 6;
4. impregnator 7 is installed on the liquid injecting mouth 3 of anchor pole, control operation valve then allows high-pressure emulsion, enters the anchor pole inner chamber through the aperture of impregnator 7 and liquid injecting mouth 3, and the body of rod is expanded, and is crowded with borings, the rib anchoring.In expanded radially, because of deformation length will shorten 1～4mm, anchor dish 5 and supporting plate 6 are pressed on the rib 11, prevent the coal body wall caving;
5. the shutoff operation valve 9, take off impregnator 7, carry out the operation of another root anchor pole, and the fluid injection time of every anchor pole was no more than for 10 seconds.
Determining of anchor pole spacing:
1. the general not serious power expansion type roof bolt of just not fetching water of wall caving or wall caving not.
When 2. wall caving is very not serious, can strengthen the anchor pole spacing more than 1.5 meters or 1.5 meters.
When 3. wall caving is relatively more serious, can suitably dwindle the anchor pole spacing at 1.0～1.5 meters.
4. when periodic weighting or circuitous geological structure arranged, or face upward oblique upward slope and mine when causing the wall caving especially severe, can be encrypted in anchor pole in 1 meter, or play the boring that double three presbyopia are arranged, can keep the coal of anchor pole top here this moment, set cap is fallen below anchor pole to reduce mining height, treat again mining height to be restored after the improving situation.At the long 2.5m of anchor pole, when the width of cylinder 13 was 0.6m, every propelling four blade was made a call to bolthole one time.
When occurring partial roof falling at actual or situation because of sheet nation and need, can on top board above the rib 12, drill, hydraulic expansion type pipe anchor pole is installed, as shown in Figure 4.At this moment, bolthole is generally used the air drill perforating, and boring is 30～45 degree with the angle of elevation alpha of top board 12, and beating anchor pole on top board can be by coming whole off duty carrying out.
Claims (3)
1, a kind ofly is used for the method that the down-hole stope prevents the roof fall of rib sheet nation, on the top board on the working face wall and above the rib, drill, it is characterized in that in boring, inserting hydraulic expansion type anchor stock, chew injection pressure liquid with impregnator through the fluid injection of anchor pole, make the body of rod of anchor pole expand the jam-packed borehole wall.
2, stope according to claim 1 prevents the method for rib sheet nation roof fall, it is characterized in that saidly chewing injection pressure liquid through the fluid injection of anchor pole with impregnator, be as control valve the operation valve of hydraulic support, with the emulsion of support hydraulic system as pressure liquid, to the high-pressure rubber pipe of operation on the valve, and the impregnator of high-pressure rubber pipe termination band is chewed through fluid injection and is injected the anchor pole inner chamber by changing-over.
3, stope according to claim 1 prevents the method for rib sheet nation roof fall, it is characterized in that said hydraulic expansion type anchor stock, and its length is 2.0～3.0m, pipe thickness 1.0～1.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91107964 CN1073501A (en) | 1991-12-19 | 1991-12-19 | Hydraulic expansion type anchor stock is prevented the roof fall of coal face wall caving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91107964 CN1073501A (en) | 1991-12-19 | 1991-12-19 | Hydraulic expansion type anchor stock is prevented the roof fall of coal face wall caving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1073501A true CN1073501A (en) | 1993-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91107964 Pending CN1073501A (en) | 1991-12-19 | 1991-12-19 | Hydraulic expansion type anchor stock is prevented the roof fall of coal face wall caving |
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| CN (1) | CN1073501A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1788140B (en) * | 2003-05-12 | 2010-08-11 | 阿特拉斯科普科凿岩机股份公司 | Expandable rock bolt and rock bolting system |
| CN102213102A (en) * | 2011-06-07 | 2011-10-12 | 中国矿业大学 | Method for righting toppled brackets of large-inclined-angle working surface |
| CN1791734B (en) * | 2003-05-12 | 2012-10-10 | 阿特拉斯科普科凿岩机股份公司 | Controlled expansion of rock bolt |
| CN102733835A (en) * | 2012-07-03 | 2012-10-17 | 四川伯源岩土工程有限公司 | Watery distension anchor rod, matching connecting joint and connection method of watery distension anchor rod |
| CN102852532A (en) * | 2012-10-09 | 2013-01-02 | 冀中能源股份有限公司东庞矿 | Grouting method for preventing rib walk caving |
| CN110080678A (en) * | 2019-04-19 | 2019-08-02 | 徐建忠 | A kind of coal and rock high molecular material consolidation grouting perforating arrangement method |
| CN115045697A (en) * | 2022-05-13 | 2022-09-13 | 中国科学院武汉岩土力学研究所 | Application method of sleeve expansion type large-deformation prestress hydraulic expansion grouting anchor rod |
-
1991
- 1991-12-19 CN CN 91107964 patent/CN1073501A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1788140B (en) * | 2003-05-12 | 2010-08-11 | 阿特拉斯科普科凿岩机股份公司 | Expandable rock bolt and rock bolting system |
| CN1791734B (en) * | 2003-05-12 | 2012-10-10 | 阿特拉斯科普科凿岩机股份公司 | Controlled expansion of rock bolt |
| CN102213102A (en) * | 2011-06-07 | 2011-10-12 | 中国矿业大学 | Method for righting toppled brackets of large-inclined-angle working surface |
| CN102213102B (en) * | 2011-06-07 | 2013-04-24 | 中国矿业大学 | Method for righting toppled brackets of large-inclined-angle working surface |
| CN102733835A (en) * | 2012-07-03 | 2012-10-17 | 四川伯源岩土工程有限公司 | Watery distension anchor rod, matching connecting joint and connection method of watery distension anchor rod |
| CN102852532A (en) * | 2012-10-09 | 2013-01-02 | 冀中能源股份有限公司东庞矿 | Grouting method for preventing rib walk caving |
| CN102852532B (en) * | 2012-10-09 | 2015-06-17 | 冀中能源股份有限公司东庞矿 | Grouting method for preventing rib walk caving |
| CN110080678A (en) * | 2019-04-19 | 2019-08-02 | 徐建忠 | A kind of coal and rock high molecular material consolidation grouting perforating arrangement method |
| CN115045697A (en) * | 2022-05-13 | 2022-09-13 | 中国科学院武汉岩土力学研究所 | Application method of sleeve expansion type large-deformation prestress hydraulic expansion grouting anchor rod |
| CN115045697B (en) * | 2022-05-13 | 2023-10-24 | 中国科学院武汉岩土力学研究所 | Use method of sleeve expansion type large-deformation prestress hydraulic expansion grouting anchor rod |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |