CN105736010A - Supporting structure for extremely-narrow coal pillar roadway driving along goaf and construction method of supporting structure - Google Patents
Supporting structure for extremely-narrow coal pillar roadway driving along goaf and construction method of supporting structure Download PDFInfo
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- CN105736010A CN105736010A CN201610241124.8A CN201610241124A CN105736010A CN 105736010 A CN105736010 A CN 105736010A CN 201610241124 A CN201610241124 A CN 201610241124A CN 105736010 A CN105736010 A CN 105736010A
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- Prior art keywords
- coal
- anchor pole
- pole
- canopy
- steel
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- 239000003245 coal Substances 0.000 title claims abstract description 103
- 238000010276 construction Methods 0.000 title claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 52
- 239000010959 steel Substances 0.000 claims abstract description 52
- 239000007787 solid Substances 0.000 claims abstract description 33
- 210000003141 lower extremity Anatomy 0.000 claims description 20
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000005728 strengthening Methods 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 abstract description 6
- 238000009423 ventilation Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/006—Lining anchored in the rock
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/22—Clamps or other yieldable means for interconnecting adjacent arch members either rigidly, or allowing arch member parts to slide when subjected to excessive pressure
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a supporting structure for extremely-narrow coal pillar roadway driving along a goaf and a construction method of the supporting structure. The supporting structure for extremely-narrow coal pillar roadway driving along the goaf is a structural form that a bolt-beam-net support is adopted on a roadway roof; a roadway solid coal side is supported by utilizing a coal side anchor rod; the side of the roadway goaf is supported by a steel shed leg matched with the anchor rod; the steel shed leg is clamped, fixed and connected by an upper arch section and a lower straight leg section by utilizing a clamping cable; the straight leg section is positioned on the side of a coal pillar; the top end of the arch section extends to the roadway roof. According to the supporting structure disclosed by the invention, not only can the resource recovery rate be improved, but also the roadway space can be effectively maintained to facilitate ventilation and pedestrians.
Description
Technical field
The present invention relates to one to be applied to underground coal mine and stay gob side entry driving roadway support structure and construction method thereof when setting 1～2m coal column.
Background technology
Underground coal mine gob side entry driving referred at this stage coal body edge and goaf intersection digging laneway of upper stage, stay and set reasonable coal column, make tunnel be positioned at the stress relaxed area at edge, goaf, to alleviate tunnel pressure, reach a kind of drift support type of the easily purpose of maintenance.Generally individually reserved coal pillar during gob side entry driving, one is to isolate goaf, and two is to support back.Staying the basic principle setting protection pillar is allow tunnel be in the region that a bearing capacity is relatively low as far as possible, and two is reduce coal pillar width as far as possible to increase resource recovery.The width of current reserved coal pillar is promising three classes mainly: first kind coal pillar width is not more than 3m, and the coal column of this kind of width can only play the effect in isolation goaf, and substantially destroys due to it, lose bearing capacity；Equations of The Second Kind coal pillar width 3～8m, this type of coal column is except isolation goaf, although suffer more serious destruction and bigger deformation occurs, still having certain bearing capacity；3rd class coal pillar width is not less than 8m, and this type of coal column generally will not all be damaged, and has higher bearing capacity.
From the viewpoint of improving resource recovery and being prone to roadway maintenance, underground coal mine the 3rd class coal column and the use that coal pillar width is 3～8m are most commonly seen, but mine deficient for part resource, the entrance date of retirement, in order to improve resource recovery, wish that reduction coal column stays as far as possible and set width, but when coal pillar width is down to below 3m, goaf side coal side is crisp by pressure under overburden pressure effect, roof bolting with barand wire mesh conventional while losing bearing capacity loses reliable impetus, lane space cannot be safeguarded, now derives again Air Leakage.Up to now, for staying gob side entry supporting construction when setting 1～3m pole thin coal pillar and construction method thereof not to be publicly reported.
Summary of the invention
The present invention is for avoiding the weak point existing for above-mentioned prior art, a kind of coal pillar width supporting construction at the pole thin coal pillar gob side entry driving of 1～3m and construction method thereof are provided, to resource recovery can be promoted, lane space be can effectively safeguard again, ventilation and pedestrian are beneficial to.
The present invention solves that above-mentioned technical problem adopts the following technical scheme that
The supporting construction of pole of the present invention thin coal pillar gob side entry driving, described pole thin coal pillar gob side entry driving refers to when tunnelling, stays along edge, adjacent sections goaf and sets 1～3m coal column gob side entry driving；Being characterized in that of the supporting construction of described pole thin coal pillar gob side entry driving:
The present invention adopts the version of roof bolting with barand wire mesh at back, top board anchor cable in described roof bolting with barand wire mesh adopts combination of steel rope, described combination of steel rope refers to and with longitudinal ceiling steel channel beam, anchor cable is coordinated supporting, and described longitudinal ceiling steel channel beam refers to the steel channel beam being supported on back along tunnelling direction；
Coal side anchor pole is utilized to carry out supporting for tunnel entity coal side；
Adopting steel canopy lower limb to coordinate anchor pole to carry out supporting at tunnel goaf side, described steel canopy lower limb is to be utilized card cable card to be solidly connected by epimere arcuate segment and hypomere straight legs section；Described straight legs section is positioned at coal column lateral wall, and the top of described arcuate segment is along extending back；The anchor pole coordinated with described steel canopy lower limb includes: be arranged in the top of arcuate segment, in the be vertically anchored at back first solid canopy anchor pole, it is arranged in the middle part of arcuate segment and is anchored at the second solid canopy anchor pole of coal column and back along arcuate surface normal direction, and to the be anchored at coal column and roadway floor the 3rd solid canopy anchor pole under being arranged in the middle part of straight legs section and tilting.
The feature of the supporting construction of pole of the present invention thin coal pillar gob side entry driving lies also in: the length of the described first solid canopy anchor pole, the second solid canopy anchor pole and the 3rd solid canopy anchor pole is all not less than 1500mm.
The feature of the supporting construction of pole of the present invention thin coal pillar gob side entry driving lies also in: the 3rd solid canopy anchor pole is to be anchored in coal column and roadway floor with the angle of depression of 30 °.
The feature of the construction method of the supporting construction of pole of the present invention thin coal pillar gob side entry driving is to carry out as follows:
Step 1, each drilling depth 2m of development machine is utilized to tunnel in tunnel；
Step 2, implementing roof timbering after completing every time pick on back, described roof timbering adopts roof bolting with barand wire mesh, carries out coordinating with longitudinal ceiling steel channel beam by the anchor cable in roof bolting with barand wire mesh and implements strengthening supporting, and the length of described anchor cable is not less than 7.5m；
Step 3, for tunnel entity coal side utilize coal side suspension roof support；
Step 4, implement that coal column is collateral protects, it is adopt the 10# wire netting back of the body to protect coal column lateral wall, at the fillet place, top of coal column reinforcing bar basketry sheet wall supporting, and with Periostracum Serpentis packed coal fillet place tamped and to make it domed, by the first solid canopy anchor pole through the reserved mounting hole in the top of arcuate segment in steel canopy lower limb in being vertically anchored in back, second solid canopy anchor pole through the reserved mounting hole in the middle part of arcuate segment in steel canopy lower limb and is anchored at along arcuate surface normal direction in coal column and back, the 3rd solid canopy anchor pole is anchored in coal column and roadway floor with the angle of depression of 30 °.
Compared with the prior art, the present invention has the beneficial effect that:
1, in the present invention, steel canopy lower limb is utilized card cable card to be solidly connected by epimere arcuate segment and hypomere straight legs section and forms half inverse u shape support, efficiently solve the roadway support issues of the pole thin coal pillar that width is 1～3m, by roadway layout is being propped up the position that bearing capacity is relatively low, be conducive to tunnel safety stable；
2, in the present invention in inverse u shape support steel canopy lower limb have can contracting yielding property energy, can automatically adapt to crush, compared with tunneling boring roof bolting with barand wire mesh, drift section convergency factor reduces by more than 30%, roadway maintenance amount is minimum, does not even keep in repair, and significantly reduces lane and accomplishes this.
3, the present invention stays the coal column setting 1～3m, makes Pillar Recovery rate improve 60～80%；
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram；
Fig. 2 is steel canopy lower limb structural representation in the present invention；
Number in the figure: 1 tunnel, 11 first solid canopy anchor poles, 12 second solid canopy anchor poles, 13 the 3rd solid canopy anchor poles, 2 coal columns, 21 arcuate segment, 22 straight legs sections, 3 backs, 31 anchor cables, 32 longitudinal ceiling steel channel beams, 33 ceiling anchor poles, 4 entity coal sides, 41 coal side anchor poles, 5 roadway floors.
Detailed description of the invention
Referring to Fig. 1 and Fig. 2, in the present embodiment, pole thin coal pillar gob side entry driving refers to when tunnel 1 is tunneled, and stays along edge, adjacent sections goaf and sets 1～3m coal column 2 gob side entry driving.
In the present embodiment, the supporting construction of pole thin coal pillar gob side entry driving is:
The version of roof bolting with barand wire mesh is adopted at back, top board anchor cable in roof bolting with barand wire mesh adopts combination of steel rope, combination of steel rope refers to and with longitudinal ceiling steel channel beam 32, anchor cable 31 is coordinated supporting, and longitudinal ceiling steel channel beam 32 refers to and is supported on the steel channel beam on back 3 along tunnelling direction；The version of roof bolting with barand wire mesh is: adopts the wire netting back of the body to protect back 3, utilizes ceiling anchor pole 33 to coordinate steel band to carry out initial support, and anchor cable 31 coordinates longitudinal ceiling steel channel beam 32 to make strengthening supporting.Wherein ceiling anchor pole 33 adopts Φ 20 × 2400mm left hand thread steel equal strength anchor rod, and an array pitch is 800 × 800mm；Anchor cable 31 is Φ 22 × 7500mm, and between anchor cable 31, array pitch is 1100 × 800mm.Along tunnel longitudinally and be that decussation is arranged with steel band, every longitudinal ceiling channel-section steel installs three anchor cables, the version of formation " beam three rope " to longitudinal ceiling steel channel beam 32.
4 are helped to utilize coal side anchor pole 41 to carry out supporting for tunnel entity coal；Protecting including adopting 8# wire netting that entity coal side in tunnel is carried out the wire netting back of the body, coal side anchor pole 41 coordinates flat strip steel to carry out supporting.Coal side anchor pole 41 is the left hand thread steel equal strength anchor rod adopting Φ 20 × 2400mm, and between coal side anchor pole 41, array pitch is set to 800 × 800mm；The coal side anchor pole elevation angle and the angle of depression with 20 ° respectively of the top corner and bottom corners place that are positioned at entity coal side 4 anchors into, and the vertical lane side of all the other coals side anchor pole anchors into；Flat strip steel is longitudinally laid along tunnel, and two steel bands that same row is adjacent overlap and compress wire netting mutually, and the coal side anchor pole of steel band lap-joint anchors into entity coal side from overlap joint hole.
As depicted in figs. 1 and 2, adopting steel canopy lower limb to coordinate anchor pole to carry out supporting at tunnel goaf side in the present embodiment, steel canopy lower limb is to be utilized card cable 23 card to be solidly connected by epimere arcuate segment 21 and hypomere straight legs section 22；Straight legs section 22 is positioned at coal column lateral wall, and the top of arcuate segment 21 is along extending back 3；The anchor pole coordinated with steel canopy lower limb includes: be arranged in the top of arcuate segment 21, in the be vertically anchored at back 3 first solid canopy anchor pole 11, it is arranged in the middle part of arcuate segment 21 and is anchored at the second solid canopy anchor pole 12 of coal column 2 and back 3 along arcuate surface normal direction, and to the be anchored at coal column 2 and roadway floor 5 the 3rd solid canopy anchor pole 13 under being arranged in the middle part of straight legs section 22 and tilting.
In being embodied as, the length of the first solid solid canopy anchor pole of canopy anchor pole 11, second 12 and the 3rd solid canopy anchor pole 13 is all not less than 1500mm；3rd solid canopy anchor pole 13 is to be anchored in coal column and roadway floor 5 with the angle of depression of 30 °.
In the present embodiment, the construction method of the supporting construction of pole thin coal pillar gob side entry driving is to carry out as follows:
Step 1, each drilling depth 2m of development machine is utilized to tunnel in tunnel 1；
Step 2, implementing roof timbering after completing every time pick on back 3, roof timbering adopts roof bolting with barand wire mesh, carries out coordinating with longitudinal ceiling steel channel beam 32 by the anchor cable 31 in roof bolting with barand wire mesh and implements strengthening supporting, and the length of anchor cable 31 is not less than 7.5m；
Step 3, for tunnel entity coal help 4 utilize coal side anchor pole 41 supporting；
Step 4, implement that coal column is collateral protects, it is adopt the 10# wire netting back of the body to protect coal column lateral wall, at the fillet place, top of coal column 2 reinforcing bar basketry sheet wall supporting, and with Periostracum Serpentis packed coal fillet place tamped and to make it domed, by the first solid canopy anchor pole 11 through the reserved mounting hole in the top of arcuate segment 21 in steel canopy lower limb in being vertically anchored in back 3, second solid canopy anchor pole 12 is reserved mounting hole through the middle part of arcuate segment 21 in steel canopy lower limb, and it is anchored in coal column 2 and back 3 along arcuate surface normal direction, 3rd solid canopy anchor pole 13 is anchored in coal column 2 and roadway floor 5 with the angle of depression of 30 °.
In being embodied as, a pack support is formed with every steel canopy lower limb, walking upwards along tunnel, spacing between each pack support is set to 600mm, between each pack support, being attached making each pack support be formed as overall structure between steel canopy lower limb with longitudinal reinforcing pull rod, longitudinal reinforcing pull rod has twice, lays respectively at epimere arcuate segment 21 and the middle part of hypomere straight legs section 22.
Claims (4)
1. a supporting construction for pole thin coal pillar gob side entry driving, described pole thin coal pillar gob side entry driving refers to when tunnel (1) is tunneled, and stays along edge, adjacent sections goaf and sets 1～3m coal column (2) gob side entry driving；The supporting construction of described pole thin coal pillar gob side entry driving is characterized by:
The version of roof bolting with barand wire mesh is adopted at back, top board anchor cable in described roof bolting with barand wire mesh adopts combination of steel rope, described combination of steel rope refers to and with longitudinal ceiling steel channel beam (32), anchor cable (31) is coordinated supporting, and described longitudinal ceiling steel channel beam (32) refers to and is supported on the steel channel beam on back (3) along tunnelling direction；
(4) are helped to utilize coal side anchor pole (41) to carry out supporting for tunnel entity coal；
Adopting steel canopy lower limb to coordinate anchor pole to carry out supporting at tunnel goaf side, described steel canopy lower limb is to be utilized card cable (23) card to be solidly connected by epimere arcuate segment (21) and hypomere straight legs section (21)；Described straight legs section (22) is positioned at coal column lateral wall, and the top of described arcuate segment (21) is along extending back (3)；The anchor pole coordinated with described steel canopy lower limb includes: be arranged in the top of arcuate segment (21), in the be vertically anchored at back (3) first solid canopy anchor pole (11), it is arranged in the middle part of arcuate segment (21) and is anchored at the second solid canopy anchor pole (12) of coal column (2) and back (3) along arcuate surface normal direction, and consolidate canopy anchor pole (13) to the be anchored at coal column (2) and roadway floor (5) the 3rd under being arranged in the middle part of straight legs section (4) and tilting.
2. the supporting construction of pole according to claim 1 thin coal pillar gob side entry driving, is characterized in that: the length of the described first solid canopy anchor pole (11), the second solid canopy anchor pole (12) and the 3rd solid canopy anchor pole (13) is all not less than 1500mm.
3. the supporting construction of pole according to claim 1 thin coal pillar gob side entry driving, is characterized in that: the 3rd solid canopy anchor pole (13) is to be anchored in coal column and roadway floor (5) with the angle of depression of 30 °.
4. the construction method of the supporting construction of the pole thin coal pillar gob side entry driving described in claim 1, is characterized in that carrying out as follows:
Step 1, each drilling depth 2m of development machine is utilized to tunnel in tunnel (1)；
Step 2, after completing every time pick, on back (3), implement roof timbering, described roof timbering adopts roof bolting with barand wire mesh, carrying out coordinating enforcement strengthening supporting with longitudinal ceiling steel channel beam (32) by the anchor cable (31) in roof bolting with barand wire mesh, the length of described anchor cable (31) is not less than 7.5m；
Step 3, for tunnel entity coal help (4) utilize coal side anchor pole (41) supporting；
Step 4, implement that coal column is collateral protects, it is adopt the 10# wire netting back of the body to protect coal column lateral wall, at the fillet place, top of coal column (2) reinforcing bar basketry sheet wall supporting, and with Periostracum Serpentis packed coal fillet place tamped and to make it domed, by the first solid canopy anchor pole (11) through the reserved mounting hole in the top of arcuate segment (21) in steel canopy lower limb in being vertically anchored in back (3), second solid canopy anchor pole (12) is reserved mounting hole through the middle part of arcuate segment (21) in steel canopy lower limb, and it is anchored in coal column (2) and back (3) along arcuate surface normal direction, 3rd solid canopy anchor pole (13) is anchored in coal column (2) and roadway floor (5) with the angle of depression of 30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610241124.8A CN105736010A (en) | 2016-04-15 | 2016-04-15 | Supporting structure for extremely-narrow coal pillar roadway driving along goaf and construction method of supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610241124.8A CN105736010A (en) | 2016-04-15 | 2016-04-15 | Supporting structure for extremely-narrow coal pillar roadway driving along goaf and construction method of supporting structure |
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| CN105736010A true CN105736010A (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610241124.8A Pending CN105736010A (en) | 2016-04-15 | 2016-04-15 | Supporting structure for extremely-narrow coal pillar roadway driving along goaf and construction method of supporting structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894833A (en) * | 2017-01-23 | 2017-06-27 | 山东科技大学 | Gob side entry driving unbalanced support structure and construction method under the unstable overlying strata in deep |
| CN108049898A (en) * | 2018-01-16 | 2018-05-18 | 湖南科技大学 | A kind of support system and its method for protecting support for coal road weak broken top plate |
| CN108661665A (en) * | 2018-05-17 | 2018-10-16 | 兖州煤业股份有限公司 | A kind of fender gob side entry supporting construction and its method for protecting support |
| CN114017079A (en) * | 2021-10-29 | 2022-02-08 | 国能神东煤炭集团有限责任公司 | Roadway supporting device for gob-side entry driving under coal mine |
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| RU2131038C1 (en) * | 1998-01-14 | 1999-05-27 | Сидоренко Николай Викторович | Spring lock of yielding support of mine workings |
| DE10235635A1 (en) * | 2002-02-20 | 2003-08-28 | Werner P Berwald | Assembly of curved structures, for a tunnel lining, has multi-functional locks at their overlaps to give a variety of bonds using minimum components, with or without anchors |
| CN101100945A (en) * | 2006-06-24 | 2008-01-09 | 唐卫东 | Mine tunnel U-shaped mulch area fork door support technology |
| CN102418539A (en) * | 2011-10-31 | 2012-04-18 | 山西晋城无烟煤矿业集团有限责任公司 | Supporting process in soft rock mine roadway rush through construction tunneling |
| CN105370299A (en) * | 2015-11-27 | 2016-03-02 | 山东新巨龙能源有限责任公司 | Kilometers-deep thick coal seam narrow coal pillar gob-side entry supporting process |
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2016
- 2016-04-15 CN CN201610241124.8A patent/CN105736010A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2131038C1 (en) * | 1998-01-14 | 1999-05-27 | Сидоренко Николай Викторович | Spring lock of yielding support of mine workings |
| DE10235635A1 (en) * | 2002-02-20 | 2003-08-28 | Werner P Berwald | Assembly of curved structures, for a tunnel lining, has multi-functional locks at their overlaps to give a variety of bonds using minimum components, with or without anchors |
| CN101100945A (en) * | 2006-06-24 | 2008-01-09 | 唐卫东 | Mine tunnel U-shaped mulch area fork door support technology |
| CN102418539A (en) * | 2011-10-31 | 2012-04-18 | 山西晋城无烟煤矿业集团有限责任公司 | Supporting process in soft rock mine roadway rush through construction tunneling |
| CN105370299A (en) * | 2015-11-27 | 2016-03-02 | 山东新巨龙能源有限责任公司 | Kilometers-deep thick coal seam narrow coal pillar gob-side entry supporting process |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894833A (en) * | 2017-01-23 | 2017-06-27 | 山东科技大学 | Gob side entry driving unbalanced support structure and construction method under the unstable overlying strata in deep |
| CN108049898A (en) * | 2018-01-16 | 2018-05-18 | 湖南科技大学 | A kind of support system and its method for protecting support for coal road weak broken top plate |
| CN108049898B (en) * | 2018-01-16 | 2024-01-26 | 湖南科技大学 | Supporting system and supporting method for weak broken roof of coal roadway |
| CN108661665A (en) * | 2018-05-17 | 2018-10-16 | 兖州煤业股份有限公司 | A kind of fender gob side entry supporting construction and its method for protecting support |
| CN114017079A (en) * | 2021-10-29 | 2022-02-08 | 国能神东煤炭集团有限责任公司 | Roadway supporting device for gob-side entry driving under coal mine |
| CN114017079B (en) * | 2021-10-29 | 2023-10-13 | 国能神东煤炭集团有限责任公司 | Roadway support device for underground gob-side entry driving of coal mine |
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Application publication date: 20160706 |
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