CN105370299B - The buried empty roadway protection processing in high seam thin coal pillar edge of km - Google Patents

The buried empty roadway protection processing in high seam thin coal pillar edge of km Download PDF

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Publication number
CN105370299B
CN105370299B CN201510853822.9A CN201510853822A CN105370299B CN 105370299 B CN105370299 B CN 105370299B CN 201510853822 A CN201510853822 A CN 201510853822A CN 105370299 B CN105370299 B CN 105370299B
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CN
China
Prior art keywords
anchor
plate
supporting
gob
entry
Prior art date
Application number
CN201510853822.9A
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Chinese (zh)
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CN105370299A (en
Inventor
孙广京
李爱民
张治高
李志深
卢诗祥
王延辉
徐波
谭文峰
Original Assignee
山东新巨龙能源有限责任公司
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Priority to CN201510853822.9A priority Critical patent/CN105370299B/en
Publication of CN105370299A publication Critical patent/CN105370299A/en
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Publication of CN105370299B publication Critical patent/CN105370299B/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14Lining predominantly with metal
    • E21D11/15Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
    • E21D11/152Laggings made of grids or nettings
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14Lining predominantly with metal
    • E21D11/15Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
    • E21D11/155Laggings made of strips, slats, slabs or sheet piles
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00Setting anchoring-bolts

Abstract

The invention discloses a kind of buried empty roadway protection processing in high seam thin coal pillar edge of km, it is characterised in that and first, after gob side entry is excavated according to design section, helped first using anchor+band+net support form supporting roof and two;Second, top plate and two are helped to carry out strengthening supporting;3rd, gob side entry advance support.Due to adding the combined supporting form of anchor cable beam column using anchor band net, roadway deformation can be effectively controlled, meets the production needs of next working face;Advance support is carried out using unit supports formula advance timbering particularly in the gob side entry in front of working face, deformation of the surrounding rock in tunnel amount is obviously reduced, and compared with using individual prop supporting, two help average deformation amount to reduce 566mm, roof to floor convergence reduces 767mm, and pucking amount, which is reduced, reaches 473mm.

Description

The buried empty roadway protection processing in high seam thin coal pillar edge of km

Technical field

The present invention relates to coal mining technology, more particularly to along empty roadway protection processing.

Background technology

At present, coal mining depth reaches km.With coal mining depth, the increase of intensity, and to the big of the energy Amount demand, many Deep Mines are general by the way of thin coal pillar gob side entry driving is stayed in goaf side stope drift active workings.Due to adopting Deep increase year by year, especially in high seam (more than 3.5m) exploitation, gob side entry highlights that surrouding rock deformation is strong, destroys model Enclose greatly, roof fall, wall caving easily occur.So that gob side entry maintenance is more and more difficult, the fltting speed and peace of working face are constrained Full production, has seriously affected the construction in safe and efficient work face although in the past few years scientific research department, colleges and universities and production scene strengthen To deep fractures production practice, the research of roadway support, also achieves certain effect, but for deep-well gob side entry stability Aspect also recognizes deficiency.《Safety regulations in coal mine》Required 20m advance supports are far from meeting gob side entry to advanced branch The demand of shield.At the same time as working face installed power is continuously increased, equipment size is increasing, and supporting is with opening during gob side entry driving Advance support area, height are also bigger during adopting, therefore supporting becomes high yield with advance support during exploitation during gob side entry driving The emphasis and difficult point of working face protection (are put) in efficient fully mechanized mining.For the depth that roof pressure is big, deformation is serious, deformation effect scope is big Portion's big cross section gob side entry, during gob side entry driving frequently with anchor pole and Application of Combined Support with Anchor, in application process there are anchor cable- The problems such as bolt action mismatches and the design method of cable bolting is not suitable with coal roadway support.Advanced branch during working face mining The supporting length that shield distance is longer, supporting intensity is bigger more favourable to roadway maintenance but long will necessarily exist to top plate repeatedly Support causes roof cracking.China's high seam yield accounts for 45% or so of raw coal total output, is a high seam reserves big country, It is the exploitation big country of high seam, therefore, the buried high seam working face thin coal pillar gob side entry support issues of km is worth studying.

The content of the invention

To solve the buried high seam working face thin coal pillar gob side entry supporting difficult problem of km, the present invention proposes one kind Thin coal pillar can effectively control roadway deformation, meet production needs along empty roadway protection processing.

The buried high seam thin coal pillar of km of the present invention is along empty roadway protection processing:

First, after gob side entry is excavated according to design section, first using anchor+band+net support form supporting roof and two Side, i.e., help first paving in top plate and two and hang one layer of bar-mat reinforcement, then pushed down with steel band, then steel band is anchored at top plate with anchor pole On;For the arrangement form of above-mentioned steel band to be arranged along drift section, the spacing of steel band is 1000mm, is set on steel band per spacing 900mm There is a bolthole, anchor pole is arranged as the form of array pitch between 900 × 1000mm;

Second, top plate and two are helped to carry out strengthening supporting

After the completion of anchor+band+net supporting, then plate helps top plate and two to carry out strengthening supporting;

The strengthening supporting of top plate is that anchor cable beam is set between top plate steel band, and anchor cable beam uses the anchoring shape of three rope of a beam Formula, i.e., be respectively equipped with anchor cable hole in the centre of steel channel beam and both ends, with three anchorage cable anchorings on top plate;

The strengthening supporting in portion of side is:Anchor cable column is set on thin coal pillar lateral wall face, anchor cable column uses the anchoring of three rope of a column Form, i.e., be respectively equipped with anchor cable eye in the centre of channel column and upper/lower terminal, with three anchorage cable anchorings on lateral wall country rock;Groove Steel column is arranged between lateral wall steel band, spacing 2m;Upper eye and lower eye use 6.3m anchor cables, and the direction of anchor cable is respectively to top plate Tilted with bottom plate direction;Middle eye uses 4.3m anchor cables;

3rd, gob side entry advance support

With the exploitation of working face, surpassed in the gob side entry in front of working face using unit supports formula advance timbering Preceding supporting;Lame advanced supporting length is not less than 60m;Said units brace type advance timbering structure is by a unjointed beam, double columns Formed with a unsplit bedplate, be needling formula pin shaft joint form between unjointed beam, unsplit bedplate and double columns.

The positive effect of the present invention is, due to the combined supporting form using " anchor band net " plus anchor cable beam column, can effectively to control Roadway deformation processed, meets the production needs of next working face;Particularly, unit is used in the gob side entry in front of working face Brace type advance timbering carries out advance support, and deformation of the surrounding rock in tunnel amount is obviously reduced, and compared with using individual prop supporting, two help Average deformation amount reduces 566mm, and roof to floor convergence reduces 767mm, and pucking amount, which is reduced, reaches 473mm.

Brief description of the drawings

Fig. 1 is embodiment gob side entry supporting sectional drawing;

Fig. 2 is Figure 1A portions enlarged drawing;

Fig. 3 is Figure 1B portions enlarged drawing;

Fig. 4 is unit supports formula advance timbering front view;

Fig. 5 is the side view of Fig. 4.

Marginal data, 1- bar-mat reinforcements, 2- steel bands, 3- anchor poles, 4- anchor rod pallet boards, 5- steel channel beams, 6- anchor cables, 7- channel columns, 8- unjointed beams, the double columns of 9-, 10- unsplit bedplates, 11- hydraulically operated valves.

Embodiment

Referring to the drawings, the buried high seam thin coal pillar of km of the present invention is further illustrated along empty roadway protection processing:

First, as shown in Figure 1, Figure 2, Figure 3 shows, after gob side entry is excavated according to design section, propped up first using " anchor band net " Shield form supporting roof and two is helped, i.e., helps first paving in top plate and two and hang one layer of bar-mat reinforcement 1, then pushed down with steel band 2, then use anchor Steel band 2 is anchored on top plate by bar 3;To be arranged along drift section, the spacing of steel band 2 is the arrangement form of above-mentioned steel band 2 1000mm, is equipped with a bolthole per spacing 900mm on steel band 2, anchor pole 3 is arranged as the form of array pitch between 900 × 1000mm; Anchor pole 3 on top plate uses the MSGLW-600 of 22 × 2500mm of φ without longitudinal rib thread steel type resin anchor, two anchor poles 3 helped The strong thread steel type resin anchor such as MSGLD-335 using 22 × 2500mm of Φ;Above-mentioned bar-mat reinforcement 1 is the bar-mat reinforcement of φ 6.0mm, 1 mesh specification of bar-mat reinforcement is 100 × 100mm;Steel band 2 on top plate is W-shaped steel band, and two steel bands 2 helped are trapezoidal steel band, is used Anchor pole 3 need to be equipped with the anchor rod pallet board 4 that specification is 150 × 150 × 10mm when anchoring trapezoidal steel band;When installing anchor pole, using 2 trees Fat Anchor Agent carries out the extensible bolting.

Second, top plate and two are helped to carry out strengthening supporting

As shown in Figure 1, after the completion of " anchor band net " supporting, then top plate and two are helped to carry out strengthening supporting;

The strengthening supporting of top plate is that anchor cable beam is set between top plate steel band, and anchor cable beam uses the anchoring shape of three rope of a beam Formula, i.e., be respectively equipped with anchor cable hole in the centre of steel channel beam 5 and both ends, is anchored at three anchor cables 6 on top plate;Above-mentioned anchor cable 6 is The high-strength nest anchor ropes of 22 × 10300mm of φ, with 3 resin anchoring agents, anchor cable case bay is 2000mm.

The strengthening supporting in portion of side is:Anchor cable column is set on thin coal pillar lateral wall face, anchor cable column uses the anchoring of three rope of a column Form, i.e., be respectively equipped with anchor cable eye in the centre of channel column 7 and upper/lower terminal, is anchored at three anchor cables 6 on lateral wall country rock; Channel column 7 is arranged between lateral wall steel band 2, spacing 2m;Upper eye and lower eye use 6.3m anchor cables, the direction of anchor cable respectively to Top plate and bottom plate direction tilt;Middle eye uses 4.3m anchor cables.

3rd, gob side entry advance support

With the exploitation of working face, surpassed in the gob side entry in front of working face using unit supports formula advance timbering Preceding supporting;Lame advanced supporting length is not less than 60m;Said units brace type advance timbering structure as shown in Figure 4 and Figure 5, by Unjointed beam 8, double columns 9, unsplit bedplate 10 and hydraulically operated valve 11 form;Between unjointed beam 8, unsplit bedplate 10 and double columns 9 It is needling formula pin shaft joint form;Unjointed beam 8 is designed and sized to long 1600mm, width 600mm, and effectively shield top length is reachable 2000mm, double columns 9 are more than 200mm, integral bottom using double telescopic posts, bearing height 2150mm-4500mm, column cylinder diameter 10 width of seat are not more than 800mm.

Claims (1)

  1. A kind of 1. buried empty roadway protection processing in high seam thin coal pillar edge of km, it is characterised in that
    First, after gob side entry is excavated according to design section, helped first using anchor+band+net support form supporting roof and two, i.e., First paving is helped in top plate and two and hangs one layer of bar-mat reinforcement, is then pushed down with steel band, then steel band is anchored at top plate and two with anchor pole and is helped On;For the arrangement form of above-mentioned steel band to be arranged along drift section, the spacing of steel band be 1000 mm, every 900 mm of spacing on steel band Equipped with a bolthole, anchor pole is set to be arranged as the form of array pitch between 900 × 1000mm;
    Second, top plate and two are helped to carry out strengthening supporting
    After the completion of anchor+band+net supporting, then top plate and two are helped to carry out strengthening supporting;
    The strengthening supporting of top plate is that anchor cable beam is set between top plate steel band, and anchor cable beam uses the anchor type of three rope of a beam, i.e., Anchor cable hole is respectively equipped with the centre of steel channel beam and both ends, with three anchorage cable anchorings on top plate;
    The strengthening supporting in portion of side is:Anchor cable column is set on thin coal pillar lateral wall face, anchor cable column uses the anchor type of three rope of a column, Anchor cable eye is respectively equipped with the centre of channel column and upper/lower terminal, with three anchorage cable anchorings on lateral wall country rock;Channel column cloth Put between lateral wall steel band, spacing 2m;Upper eye and lower eye use 6.3m anchor cables, and the direction of anchor cable is respectively to top plate and bottom plate Direction tilts;Middle eye uses 4.3m anchor cables;
    3rd, gob side entry advance support
    With the exploitation of working face, propped up in advance using unit supports formula advance timbering in the gob side entry in front of working face Shield;Lame advanced supporting length is not less than 60m;Said units brace type advance timbering is overall by a unjointed beam, double columns and one Base forms, and is needling formula pin shaft joint form between unjointed beam, unsplit bedplate and double columns.
CN201510853822.9A 2015-11-27 2015-11-27 The buried empty roadway protection processing in high seam thin coal pillar edge of km CN105370299B (en)

Priority Applications (1)

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CN201510853822.9A CN105370299B (en) 2015-11-27 2015-11-27 The buried empty roadway protection processing in high seam thin coal pillar edge of km

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Application Number Priority Date Filing Date Title
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CN105370299B true CN105370299B (en) 2018-04-20

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105736010A (en) * 2016-04-15 2016-07-06 安徽省煤炭科学研究院 Supporting structure for extremely-narrow coal pillar roadway driving along goaf and construction method of supporting structure
CN106089207B (en) * 2016-06-23 2018-06-08 大同煤矿集团有限责任公司 Super high seam working face gob side entry driving thin coal pillar stays equipment, method
CN106050282B (en) * 2016-07-08 2018-08-03 西安科技大学 A kind of anchor structure and reinforcement means of gob side entry retaining thin coal pillar
CN106894833B (en) * 2017-01-23 2018-04-06 山东科技大学 Gob side entry driving unbalanced support structure and construction method under the unstable overlying strata in deep
CN107023311A (en) * 2017-06-08 2017-08-08 刘冲 Roadway repair method below coal column
CN108561159A (en) * 2018-04-10 2018-09-21 淮南矿业(集团)有限责任公司 A kind of anti-wall caving suspension device of the high side in coal seam and method for protecting support

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CN1026606C (en) * 1993-07-24 1994-11-16 徐州矿务局庞庄煤矿 Gallery supporting method for underground free digging section in coal mine
RU2168628C1 (en) * 2000-03-20 2001-06-10 Шахтинский институт Южно-Российского государственного технического университета (Новочеркасский политехнический институт) Method of mining of stratified deposits
CN103061806B (en) * 2012-12-28 2014-12-17 山东科技大学 Composite roof thin seam fully-mechanized coal mining face gob-side entry retaining method
CN104061001B (en) * 2014-06-25 2016-09-07 枣庄矿业(集团)有限责任公司滨湖煤矿 Gob side entry retaining exploitation support process method
CN104265295B (en) * 2014-09-11 2017-06-27 四川达竹煤电(集团)有限责任公司铁山南煤矿 Medium Thickness And Medium Slope Angle coal seam prosthetic roadside packing and without coal column gob-side entry retaining method

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