CN105840217A - Coal tunnel supporting device and method - Google Patents

Coal tunnel supporting device and method Download PDF

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Publication number
CN105840217A
CN105840217A CN201610280614.9A CN201610280614A CN105840217A CN 105840217 A CN105840217 A CN 105840217A CN 201610280614 A CN201610280614 A CN 201610280614A CN 105840217 A CN105840217 A CN 105840217A
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CN
China
Prior art keywords
filling
board
support column
coal cutting
supporting
Prior art date
Application number
CN201610280614.9A
Other languages
Chinese (zh)
Inventor
张晓�
吕华文
王志超
王鹏科
吴柏仁
胡滨
王洋
马冰
刘超儒
Original Assignee
天地科技股份有限公司
陕西省何家塔煤矿
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 天地科技股份有限公司, 陕西省何家塔煤矿 filed Critical 天地科技股份有限公司
Priority to CN201610280614.9A priority Critical patent/CN105840217A/en
Publication of CN105840217A publication Critical patent/CN105840217A/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/005Props; Chocks, e.g. made of flexible containers filled with backfilling material characterised by the material
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/02Non-telescopic props
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/50Component parts or details of props

Abstract

The invention relates to the technical field of coal mining, in particular to a coal tunnel supporting device and method. The supporting device comprises a filling mold. The filling mold is vertically arranged on a bottom plate of a to-be-supported tunnel, and the upper end of the filling mold is open. The filling mold is filled with a filling body to form a supporting column, and the upper end of the supporting column is connected with a top plate of the to-be-supported tunnel. The invention further relates to the coal tunnel supporting method. Firstly, the filling mold is arranged between the top plate and the bottom plate of a to-be-supported area of the tunnel; then the filling mold is filled with the filling body to form the supporting column; after filling is completed, the supporting column is fixedly connected with the top plate. The supporting device manufactured through the supporting method can replace a cog timbering to serve as an external support of a pre-excavated retracement channel, the structure is simple, the supporting column for supporting the coal tunnel can be obtained just by filling the filling mold with the filling body, supporting steps are greatly reduced in the supporting process, and the supporting cost is reduced.

Description

A kind of coal cutting roadway suspension device and method for protecting support

Technical field

The present invention relates to coal-mining technique field, particularly relate to a kind of coal cutting roadway suspension device and prop up Maintaining method.

Background technology

At coal mining field, move for the ease of coal-face, pre-pick return channel be usually set, Need, in pre-pick return channel, outside supporting is installed in the latter stage mined to ensure to dig in advance to withdraw The security of passage.Therefore, the supporting of pre-pick return channel becomes the weight that fully-mechanized mining working withdraws Want preparation, be also the key factor of restriction fully-mechanized mining working unit yield raising.

The supporting of pre-pick return channel mainly includes two parts: internal supporting and outside supporting, The support system that internal supporting is made up of anchor pole and anchor cable, withdraws logical at working face away from pre-pick During road, only rely on internal supporting and just can safeguard pre-pick return channel stability;Outside supporting Mainly including grillage, individual prop, brettis or concrete pillar etc., working face is near pre- During pick return channel, need the supporting of outer portion to limit top board and the base plate of pre-pick return channel Relative displacement.China currently mainly uses brettis to prop up as the outside of pre-pick return channel Handguard section, removal of home operation is complex, there is certain potential safety hazard, and cost is the highest.

Summary of the invention

(1) to solve the technical problem that

The technical problem to be solved in the present invention is that existing pre-pick withdraws tunnel and exists when supporting Operate complicated, relatively costly problem.

(2) technical scheme

In order to solve above-mentioned technical problem, the invention provides a kind of coal cutting roadway suspension device, Including filling mould, vertical being located on the base plate treating supported laneway of described filling mould, and institute State the open upper end of filling mould;Fill obturation in described filling mould and form support column, institute The upper end stating support column is connected with the top board treating supported laneway.

Wherein, also include that medium-density plate, described medium-density plate are located at described support column and are treated with described Between the top board of supported laneway.

Wherein, filling binding agent between described medium-density plate and the described top board treating supported laneway, Described binding agent is cement mortar.

Wherein, described obturation is concrete or high-water material.

Wherein, described filling mould is filling bag, and the upper end open-mouth of described filling bag is by setting Hitch on described top board is connected with described top board.

Wherein, described filling bag is made up of the woven fabric with anti-flammability and antistatic behaviour, and institute State and tie up reinforcement on the outer surface of filling bag.

Present invention also offers a kind of coal cutting roadway method for protecting support, including step S1, in tunnel The top board treating supporting region and base plate between filling mould is set;S2, to described filling mould Interior filling obturation forms support column;S3, after filling completes, by described support column and described top Plate is fixing to be connected.

Wherein, the filling mould in described step S1 is to be made up of the woven fabric of flame-retardant and anti-static The filling bag closed of upper end uncovered oblique section, the upper end open-mouth of filling bag is provided with suspension ring, will hang Ring hangs on the anchor pole of top board, makes filling bag vertically hang.

Wherein, between described step S1 and described step S2, also include step S1 ', according to Distance between length and top board and the base plate of filling bag, at the underface pneumatic pick of filling bag Play the end or concrete bed is being set.

Wherein, described step S3 also includes S31, after filling completes, in described top board and institute State the rigidity that medium-density plate reduction support column is set between support column;S32, at described Midst density Between plate and described top board, described medium-density plate and described top board are connected by filling binding agent.

(3) beneficial effect

The technique scheme of the present invention has the advantage that

(1) the invention provides a kind of coal cutting roadway suspension device, wherein suspension device includes Filling mould, filling mould is located on the base plate treating supported laneway, and the upper end of filling mould opens Open;Fill obturation in filling mould and form support column, one end of support column with treat supported laneway Base plate connect, the other end is connected with top board, treats supported laneway and plays support action, this The structure of protection unit is relatively simple, it is not necessary to uses brettis, fills in filling mould Fill out body and i.e. can obtain coal cutting roadway is risen the support column of support action, be greatly saved when supporting The step of supporting, reduces the cost of supporting.

(2) present invention also offers a kind of coal cutting roadway method for protecting support, first treat supporting lane Filling mould is set between top board and the base plate in road, in filling mould, then fills the filling bodily form Become support column, be finally connected fixing to support column and top board, it is achieved support action.This filling side Method is simple to operate, reduces support cost.

Accompanying drawing explanation

Fig. 1 is the structural representation of the coal cutting roadway suspension device that the embodiment of the present invention provides;

Fig. 2 is the flow chart of the coal cutting roadway method for protecting support that the embodiment of the present invention provides.

In figure: 1: top board;2: binding agent;3: medium-density plate;4: filling mould;5: Support column.

Detailed description of the invention

For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below will knot Close the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, It is fully described by, it is clear that described embodiment is a part of embodiment of the present invention, and not It it is whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having There is on the premise of making creative work the every other embodiment obtained, broadly fall into the present invention The scope of protection.

In describing the invention, it should be noted that except as otherwise noted, " multiples' " It is meant that two or more;Term " on ", D score, "left", "right", " interior ", " outward ", " front end ", " rear end ", " head ", " afterbody " etc. instruction orientation or position relationship be based on Orientation shown in the drawings or position relationship, be for only for ease of the description present invention and simplify description, Rather than indicate or imply that the device of indication or element must have specific orientation, with specifically Azimuth configuration and operation, be therefore not considered as limiting the invention.Additionally, term " the One ", " second ", " the 3rd " etc. are only used for describing purpose, and it is not intended that instruction or hint Relative importance.

In describing the invention, in addition it is also necessary to explanation, unless otherwise clear and definite regulation and limit Fixed, term " is installed ", " being connected ", " connection " should be interpreted broadly, for example, it may be consolidate Fixed connection, it is also possible to be to removably connect, or be integrally connected;Can be to be mechanically connected, also It can be electrical connection;Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary.Right For those of ordinary skill in the art, visual concrete condition understands that above-mentioned term is in the present invention In concrete meaning.

As it is shown in figure 1, a kind of coal cutting roadway suspension device that the embodiment of the present invention provides, including Filling mould 4, filling mould 4 is located on the base plate treating supported laneway, and filling mould 4 Open upper end and, at open upper end, form support column 5 to filling obturation in filling mould 4, The lower end of support column 5 is connected with the base plate treating supported laneway, upper end and the top board treating supported laneway 1 connects, and support column is treated supported laneway and played support action.This suspension device can replace buttress formula Support is as the pre-outside supporting digging return channel, and structure is relatively simple, to filling mould 4 Interior filling obturation i.e. can obtain playing coal cutting roadway the support column 5 of support action, when supporting It is greatly saved the step of supporting, reduces the cost of supporting.

Further, also include that medium-density plate 3, medium-density plate 3 are located at pillar and are treated supporting lane Between the top board 1 in road, the lower surface of medium-density plate 3 is connected with support column 5, medium-density plate 3 Upper surface be connected with the top board 1 treating supported laneway, medium-density plate 3 has certain deformation energy Power, it is possible to reduce the rigidity of whole suspension device, improves the ability of support column 5 resistance to deformation, Avoid support column 5, because top board 1 sinks, brittle break occurs.

Further, filling binding agent 2 between medium-density plate 3 and the top board 1 treating supported laneway, Binding agent 2 is cement mortar in the present embodiment, utilizes cement mortar by medium-density plate 3 and to treat supporting The top board 1 in tunnel is bonded together, it is ensured that suspension device is in close contact with top board 1.

Further, obturation is the strong of concrete or high-water material, concrete or high-water material Spending higher, concrete or high-water material are pumped into needing the region of supporting by far-end, then Carry out filling in being transported to filling mould 4, be frozen into support column 5 after a period of time, to tunnel Play the effect of supporting;When needs dismounting suspension device, it is only necessary to utilize coal-winning machine to support Post 5 cuts broken, then transports with conveyer belt, it is not necessary to taking the special time withdraws, Improve the efficiency of the removal of home of working face to a certain extent.

The present embodiment uses concrete to carry out filling as obturation, and what concrete filling was formed props up When dagger 5 carries out supporting, long-range pump can be used to be pumped into by concrete in filling mould, can To effectively reduce the transport of down-hole material and to process work, and the industrial injury thing thus caused Therefore, also reduce the potential safety hazard that the large-scale bracket carrier in down-hole is brought simultaneously.

Further, in the present embodiment, filling mould 4 is to be made up of the woven fabric of high intensity Filling bag, this filling bag has a kind of fabric to make, can fold, it is simple to transport;Hold Weight is relatively big and is prone to be cut by coal-winning machine.Additionally filling bag has anti-flammability and antistatic behaviour, peace Full property is higher, is suitable in mine using, the outer surface of filling bag has tied up reinforcement, anti- Only during filling, filling bag excessively expands.

Further, in the present embodiment, the upper end open-mouth of filling bag is by being located at top board 1 On hitch be connected with top board 1.Hitch can be provided at the anchor pole on top board 1, Uncovered edge, upper end along filling bag is uniformly distributed multiple suspension ring, by multiple suspension ring one to one Hang on anchor pole, make filling bag upright, the pillared filling space of shape, it is ensured that to filling bag Can the pillared support column of shape 5 after interior fill concrete.

As in figure 2 it is shown, the embodiment of the present invention additionally provides the method for protecting support of a kind of coal cutting roadway, Including

Step S1, arranges filling mould between the top board treating supporting region and the base plate in tunnel, Filling mould is the filling bag being made up of the woven fabric of fire-resistant antistatic, and the upper end of filling bag is uncovered And it is provided with suspension ring, needing to arrange the Short bolt of 4 1m length of complement on the top board of Support Position, Suspension ring are coordinated to hang filling bag.The protruded length of anchor pole is about 150mm, and an array pitch is 1m × 1m, filling bag is vertically hung by the Short bolt being arranged on the top board treating supported laneway, Treating to be formed between the top board of supported laneway and base plate filling space, for making support column pour Relying on Gravitative Loads to keep vertical in journey, after having been hung by filling bag, the distance away from base plate is arranged For about 100mm.

Step S2, uses pump to fill obturation in filling bag and forms support column;Support column Two ends are connected with the top board treating supported laneway and base plate respectively, treat supported laneway and play support work It is generally concrete or high-water material by, obturation, the present embodiment uses concrete carry out Concrete support post is made in filling, when utilizing concrete filling, long-range pump can be used coagulation Soil is pumped in filling mould, effectively reduces the transport of down-hole material and processes work, and The industrial accident thus caused, also reduces what the large-scale bracket carrier in down-hole was brought simultaneously Potential safety hazard, it addition, there is the support column that concrete is made, when needs dismounting suspension device, Have only to utilize coal-winning machine to be cut by support column broken, then transport with belt, it is not necessary to take special Time withdraw, improve the efficiency of the removal of home of working face to a certain extent.

Step S3, filling is connected fixing to support column and the top board treating supported laneway after completing, Realize support action;After support column filling completes, treat between the top board of supported laneway and support column Need fixing connection, make support column and the top board treating supported laneway is in close contact, to realize supporting Effect.

Further, also include between step S1 and S2, for the position that head-room is relatively low Putting, rise at the end at the underface pneumatic pick hanging filling bag, higher position then needs to use coagulation Soil sets concrete bed (will make in the case of two kinds its surface try one's best holding level), will water The roof and floor spacing of note support column position controls at about 3.2m.

Further, step S3 specifically includes S31, after filling completes, treats supported laneway Gap is there is, between treating between the top board of supported laneway and support column between top board and support column Medium-density plate is set in gap, and by medium-density plate respectively with support column and the top board for the treatment of supported laneway Connecting, medium-density plate has ductility, reduces the rigidity of support column, improves whole supporting dress The intensity put;S32, between medium-density plate and top board, filling binding agent by medium-density plate and is treated The top board of supported laneway connects, and in the present embodiment, binding agent is cement mortar, cement mortar and in The gap treated between the top board of supported laneway and support column is filled up by density board, and ensure that and treat Protect the top board in tunnel and the fixing connection of support column.

During use, the pump of far-end is utilized to inject concrete in filling bag, after concrete setting Formed support column, medium-density plate is set between support column and the top board treating supported laneway, in close Degree plate can reduce the rigidity of whole suspension device, medium-density plate and treat supported laneway top board it Between by filling concrete slurry link together.This suspension device and method for protecting support can be used not only for pre- The supporting of pick return channel, it is also possible to for other the supporting of coal cutting roadway such as stope drift active workings.

In sum, the embodiment of the present invention provide a kind of coal cutting roadway suspension device and supporting side Method, uses concrete or high-water material to be filled into filling bag formation support column and play coal cutting roadway Support action, this suspension device making step is relatively simple, and material is simple and easy to get, and in work It is readily disassembled again during the removal of home of face, conveniently transports tunnel, improve working face to a certain extent and remove The efficiency of family, also reduces the potential safety hazard that the large-scale bracket carrier in down-hole is brought simultaneously.

Last it is noted that above example is only in order to illustrate technical scheme, and Non-to its restriction;Although the present invention being described in detail with reference to previous embodiment, ability The those of ordinary skill in territory is it is understood that it still can be to the skill described in foregoing embodiments Art scheme is modified, or wherein portion of techniques feature is carried out equivalent;And these are repaiied Change or replace, not making the essence of appropriate technical solution depart from various embodiments of the present invention technical side The spirit and scope of case.

Claims (10)

1. a coal cutting roadway suspension device, it is characterised in that: include filling mould, described What filling mould was vertical is located on the base plate treating supported laneway, and the upper end of described filling mould opens Open;Fill obturation in described filling mould and form support column, the upper end of described support column with treat The top board of supported laneway connects.
Coal cutting roadway suspension device the most according to claim 1, it is characterised in that: also Including medium-density plate, described medium-density plate is located at described support column and the described top treating supported laneway Between plate.
Coal cutting roadway suspension device the most according to claim 2, it is characterised in that: institute Stating filling binding agent between medium-density plate and the described top board treating supported laneway, described binding agent is Cement mortar.
Coal cutting roadway suspension device the most according to claim 1, it is characterised in that: institute Stating obturation is concrete or high-water material.
Coal cutting roadway suspension device the most according to claim 1, it is characterised in that: institute Stating filling mould is filling bag, and the upper end open-mouth of described filling bag is by being located on described top board Hitch be connected with described top board.
Coal cutting roadway suspension device the most according to claim 5, it is characterised in that: institute State filling bag to be made up of the woven fabric with anti-flammability and antistatic behaviour, and outside described filling bag Reinforcement is tied up on surface.
7. a coal cutting roadway method for protecting support, it is characterised in that: include step
S1, arranges filling mould between the top board treating supporting region and the base plate in tunnel;
S2, fills obturation in described filling mould and forms support column;
S3, after filling completes, is connected fixing to described support column and described top board.
Coal cutting roadway method for protecting support the most according to claim 7, it is characterised in that: institute Stating the filling mould in step S1 is that the upper end being made up of the woven fabric of flame-retardant and anti-static is uncovered tiltedly The filling bag that section is closed, the upper end open-mouth of filling bag is provided with suspension ring, suspension ring is hung over top board On anchor pole, filling bag is made vertically to hang.
Coal cutting roadway method for protecting support the most according to claim 8, it is characterised in that: Step S1 ' is also included, according to the length of filling bag between described step S1 and described step S2 And the distance between top board and base plate, the underface pneumatic pick at filling bag plays the end or is arranging Concrete bed.
Coal cutting roadway method for protecting support the most according to claim 9, it is characterised in that: institute State step S3 also to include
S31, after filling completes, arranges medium-density plate between described top board and described support column Reduce the rigidity of support column;
S32, between described medium-density plate and described top board, filling binding agent is by described Midst density Plate and described top board connect.
CN201610280614.9A 2016-04-28 2016-04-28 Coal tunnel supporting device and method CN105840217A (en)

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CN201610280614.9A CN105840217A (en) 2016-04-28 2016-04-28 Coal tunnel supporting device and method

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Application Number Priority Date Filing Date Title
CN201610280614.9A CN105840217A (en) 2016-04-28 2016-04-28 Coal tunnel supporting device and method

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106968671A (en) * 2017-05-18 2017-07-21 中国矿业大学(北京) The filling of underground coal mine coal-face return channel withdraws method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2900792Y (en) * 2006-05-26 2007-05-16 开滦(集团)有限责任公司钱家营矿业分公司 Filling bag for treating roof fall
US20120009023A1 (en) * 2010-07-09 2012-01-12 Bower Joseph P Pumpable crib bag assembly and method of installation
CN102852552A (en) * 2012-09-17 2013-01-02 扬州中矿建筑新材料科技有限公司 High-water material filling column and construction method thereof
US20130149044A1 (en) * 2010-08-02 2013-06-13 Craig Douglas Barnett Prop for Mining, Construction and the Like
CN103485801A (en) * 2013-08-26 2014-01-01 中国矿业大学(北京) Roadway support device for dynamic pressure roadway and retaining roadway along goaf
CN104500109A (en) * 2014-12-19 2015-04-08 北京瑞诺安科新能源技术有限公司 Underground support pillar and construction method thereof
CN105019924A (en) * 2015-07-30 2015-11-04 中国矿业大学 Strong roof support pier column and method for protecting section coal pillar
CN205638501U (en) * 2016-04-28 2016-10-12 天地科技股份有限公司 Above coal tunnel supporting device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2900792Y (en) * 2006-05-26 2007-05-16 开滦(集团)有限责任公司钱家营矿业分公司 Filling bag for treating roof fall
US20120009023A1 (en) * 2010-07-09 2012-01-12 Bower Joseph P Pumpable crib bag assembly and method of installation
US20130149044A1 (en) * 2010-08-02 2013-06-13 Craig Douglas Barnett Prop for Mining, Construction and the Like
CN102852552A (en) * 2012-09-17 2013-01-02 扬州中矿建筑新材料科技有限公司 High-water material filling column and construction method thereof
CN103485801A (en) * 2013-08-26 2014-01-01 中国矿业大学(北京) Roadway support device for dynamic pressure roadway and retaining roadway along goaf
CN104500109A (en) * 2014-12-19 2015-04-08 北京瑞诺安科新能源技术有限公司 Underground support pillar and construction method thereof
CN105019924A (en) * 2015-07-30 2015-11-04 中国矿业大学 Strong roof support pier column and method for protecting section coal pillar
CN205638501U (en) * 2016-04-28 2016-10-12 天地科技股份有限公司 Above coal tunnel supporting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106968671A (en) * 2017-05-18 2017-07-21 中国矿业大学(北京) The filling of underground coal mine coal-face return channel withdraws method
CN106968671B (en) * 2017-05-18 2019-10-01 中国矿业大学(北京) The filling of underground coal mine coal working face return channel withdraws method

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Application publication date: 20160810