CN108798723B - Support-top-coal-containing ultrahigh-mining roadway support method applied to thick coal seam - Google Patents
Support-top-coal-containing ultrahigh-mining roadway support method applied to thick coal seam Download PDFInfo
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- CN108798723B CN108798723B CN201810699756.8A CN201810699756A CN108798723B CN 108798723 B CN108798723 B CN 108798723B CN 201810699756 A CN201810699756 A CN 201810699756A CN 108798723 B CN108798723 B CN 108798723B
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- 239000003245 coal Substances 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005065 mining Methods 0.000 title claims description 7
- 239000002023 wood Substances 0.000 claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000011152 fibreglass Substances 0.000 claims description 4
- 239000011435 rock Substances 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000005641 tunneling Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/006—Caps for supporting mine roofs characterised by the material
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a supporting method of an ultrahigh stoping roadway containing top-supported coal, which is applied to a thick coal seam, and adopts a multi-time horizontal bottom-twisting top combined supporting technology of an anchor net cable, a U-shaped arch top beam, a wood buttress, a Pi-shaped beam and a single hydraulic prop, wherein the supporting height of the roadway exceeds more than 6m, and the specific use method is as follows: before the working face is stoped, the front working face is 60m to reinforce and support the original U-shaped arch top beam for supporting the top coal, and then the U-shaped arch shed legs are removed to reinforce and support the roadway side; the invention effectively solves the problem that the support of an arch stoping roadway containing top-supported coal in unstable thick coal seam arrangement is difficult when an ultrahigh stoping roadway (the height of the roadway exceeds 6 m) is arranged at the bottom of the mine in order to recover the bottom coal during stoping of a working face, and has good social benefit and economic benefit.
Description
Technical Field
The invention relates to the technical field of roadway support, in particular to an ultrahigh stoping roadway support method for supporting top coal in a thick coal seam.
Background
The stoping roadway is used as a roadway of a coal mining working face, generally, a top tunneling mode or a bottom tunneling mode is adopted, and the section of the stoping roadway is rectangular or trapezoidal. However, when a fault or a geological structure exists in a thick coal seam, surrounding rocks are broken, active supporting of anchor net cables is difficult to use, and in order to support a roadway, the roadway is usually supported passively by a U-shaped arch. In addition, because the coal seam thickness is great, and the occurrence is unstable, neither along the top nor along the bottom during the tunnelling, but arrange in the middle of the coal seam, this kind of tunnelling mode, cause the tunnel top to hold in the palm there is the top coal, and there is the bottom coal tunnel lower part, and the tunnel adopts U type bracket to hold in the palm the top coal support. In the coal recovery process, in order to increase the recovery of coal resources, the working face needs to recover coal along the bottom. In the roadway advance support section, the original roadway is inserted into a gangue (coal) bed bottom and is arranged along the coal seam bottom plate, and as a result, an ultrahigh roadway can appear, and the height of the roadway can exceed more than 6 meters. The height of a stoping roadway is increased, the phenomena of rib caving and roof caving caused by the influence of dynamic pressure in the process of working face mining are easier to occur, safety accidents are caused, and the research on a corresponding supporting method is very urgent.
In order to solve the problems, the invention is provided, in an arch-shaped stoping roadway in an unstable thick coal seam, the height of the stoping roadway is increased by inserting gangue (coal) into a horizontal bottom, so that stoping along the bottom can be realized, and coal resources can be recovered. To realize the technology, a supporting method for transition from an original arch roadway to an ultrahigh roadway needs to be solved. Therefore, the invention is based on the field practice, solves the supporting method of the ultrahigh arched stoping roadway (the height of the roadway is more than 6 meters), and provides an effective method for supporting the ultrahigh stoping roadway of the thick coal seam.
Disclosure of Invention
The invention aims to provide a supporting method of an ultrahigh stoping roadway containing top supporting coal, which is applied to a thick coal seam, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a supporting method of an ultrahigh stoping roadway containing top supporting coal and applied to a thick coal seam comprises the coal seam, a U-shaped arch top beam, U-shaped arch shed legs, clamping cables, a deformed steel bar anchor rod, a glass steel anchor rod, an anchor cable supporting beam, logs, a wood pile, a single hydraulic prop, a pi-shaped beam, an upper roadway wall, a lower roadway wall, a bottom plate and a bottom plate;
the method comprises the following steps:
1) strengthen original support top coal U type arched girder, advance working face 60m, consolidate U type arched girder, set up three rows of anchor rope joist, consolidate U type arched girder along the tunnel trend in the arch form stoping tunnel, let the anchor rope suspend in midair in the stable rock stratum of roof, do respectively: the first row is arranged along the central line of the roadway, the second row is arranged to be inclined to the upper wall of the roadway, and the third row is arranged to be inclined to the lower wall of the roadway.
2) The U-shaped arch shed legs are removed, the working face is advanced by 50m, the two shed legs of the U-shaped arch are removed from the working face in the arch-shaped stoping roadway, and the single hydraulic prop is adopted to temporarily strengthen the support according to the integrity of the top coal, so that the top coal is prevented from falling due to excessive crushing.
3) And (3) repairing two anchor rods, after the U-shaped arch shed legs are removed, constructing anchor rods and strong supports on the solid coal side below the U-shaped arch clamping cables, wherein the upper side of the roadway is provided with a glass fiber reinforced plastic anchor rod, and the lower side of the roadway is provided with a threaded steel anchor rod.
4) And (3) performing bottom-lying top twisting on an arch-type stoping roadway with a 40m advance working surface, performing bottom-lying top twisting on the arch-type stoping roadway, wherein the net width of the original arch-type stoping roadway before bottom lying is 4600mm, the net height is 3500mm, two anchor rods are filled after bottom lying, and then an advance support combining a U-shaped arch top beam, an anchor net cable, a wood buttress, a Pi-shaped beam and a single hydraulic prop is used for the roadway. After the bottom is laid, the net width of the arch-shaped stoping roadway is 4600mm, the net height is 6200mm, the arch-shaped stoping roadway is changed into an ultrahigh roadway, the stoping of the working face along the bottom plate is realized, and the recovery rate of coal resources is improved.
5) During the top twisting, the monomer hydraulic prop is matched with the pi-shaped beam to erect the inclined shed, the top beam is shaped like a Chinese character 'jing' and is twisted by using round wood, and the bottom twisting is carried out for three times because the bottom is deeper, and the concrete steps are as follows:
the first step is as follows: twisting to the top of 1700mm and the bottom of the horizontal position of 400mm, filling two anchor rods, using round wood as a top beam, using a single hydraulic prop as a shed leg to tilt to support the shed, digging a beam pit at the wall side of the solid coal body of the two sides, extending two ends of the round wood into the beam pit, filling a coal bag in the gap between the round wood and the beam pit, and then twisting the top beam in a 'well' shape by using the round wood;
the second step is that: twisting 1300mm of top, 1300mm of bottom, filling two sides of anchor rods, using round wood as top beam, using single hydraulic prop as shed leg to tilt to support shed, digging out beam pit at wall side of solid coal body of two sides, extending two ends of round wood into beam pit, filling coal bag in gap between round wood and beam pit, then twisting top with round wood in shape of 'well';
the third step: and (3) laying 1000mm at the bottom, filling two anchor rods, erecting a leaning shed by using a single hydraulic prop matched with a 4m pi-shaped beam and one beam and four columns, and performing top twisting on the pi-shaped beam by using round wood in a shape of a Chinese character 'jing', wherein the top twisting is 1000 mm.
As a still further scheme of the invention: the length of the anchor cable joist is 2200mm, the hole pitch of the anchor cable is 1200mm, and the specification of the anchor cable is phi 21.6 multiplied by 9500 mm.
Compared with the prior art, the invention has the beneficial effects that: the support problem of the thick coal seam top coal supporting ultrahigh stoping roadway is effectively solved, the stoping of the working face along the bottom is realized, the recovery of coal resources is improved, and the support has good social benefit and economic benefit.
Drawings
FIG. 1 is a schematic view of the original supporting section of the arch-type stoping roadway of the invention.
Fig. 2 is a schematic cross-sectional view of the supporting of the arch-shaped stoping roadway reinforcing top beam.
Fig. 3 is a schematic view of the first bottom-lying top-hinged support section of the arch-shaped stoping roadway of the invention.
Fig. 4 is a schematic view of a second bottom-hinged top supporting section of the arch-shaped stoping roadway.
Fig. 5 is a schematic cross-sectional view of the advanced support of the ultrahigh arch mining roadway.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 5, in the embodiment of the invention, a support method for an ultrahigh stoping roadway containing top-supported coal applied to a thick coal seam includes a coal seam 1, a U-shaped arch top beam 2, U-shaped arch shed legs 3, a clamping cable 4, a deformed steel bar anchor 6, a glass steel anchor 5, an anchor cable 7, an anchor cable joist 8, a log 9, a wood pile 10, a single hydraulic prop 11, a pi-shaped beam 12, an upper roadway slope 13, a lower roadway slope 14, a bottom plate 15 and a top plate 16; the method is characterized by comprising the following steps:
1) reinforce original support top coal U type arched girder 2, advance working face 60m and consolidate U type arched girder 2, set up three rows of anchor rope joist 8 and consolidate U type arched girder 2 along the tunnel trend in arch form stoping tunnel, let anchor rope 7 suspend in midair in the 16 stable rock stratums of roof, do respectively: the first row is arranged along the center line of the roadway, the second row is arranged to be deviated from the upper wall 13 of the roadway, the third row is arranged to be deviated from the lower wall 14 of the roadway, the length of the anchor cable joist 8 is 2200mm, the hole distance of the anchor cable 7 is 1200mm, and the specification of the anchor cable 7 is phi 21.6 multiplied 9500 mm.
2) The U-shaped arch shed legs 3 are removed, the working face is advanced by 50m, the two shed legs of the U-shaped arch are removed from the working face in the arch-shaped stoping roadway, and the single hydraulic prop 11 is adopted to temporarily strengthen the support according to the integrity of the top coal, so that the top coal is prevented from falling due to excessive breakage.
3) And (3) repairing anchors at two sides, removing the U-shaped arch shed legs 3, then constructing anchors below the U-shaped arch clamping cables 4 for reinforcing support, wherein the upper roadway side 13 uses glass fiber reinforced plastic anchors 5, and the lower roadway side 14 uses screw-thread steel anchors 6.
4) And (3) performing bottom-lying top twisting on an arch-type stoping roadway with a 40m advance working surface, performing bottom-lying top twisting on the arch-type stoping roadway, wherein the net width of the original arch-type stoping roadway before bottom lying is 4600mm, the net height is 3500mm, two anchor rods are filled after bottom lying, and then performing advanced support on the roadway by using a U-shaped arch top beam 2, an anchor net cable, a wood buttress 10, a Pi-shaped beam 12 and a single hydraulic prop 11. After the bottom is laid, the net width of the arch-shaped stoping roadway is 4600mm, the net height is 6200mm, the arch-shaped stoping roadway is changed into an ultrahigh roadway, the stoping of the working face along the bottom plate 15 is realized, and the recovery rate of coal resources is improved.
5) During top twisting, the single hydraulic prop 11 is matched with the pi-shaped beam 12 to erect the inclined shed, the top beam is shaped like a Chinese character 'jing' and is twisted by using the round timbers 9, and the bottom twisting is carried out for three times due to the fact that the bottom is deep, and the method comprises the following specific steps:
the first step is as follows: twisting to the top of 1700mm and the bottom of the horizontal of 400mm, filling two anchor rods, using a round log 9 as a top beam, using a single hydraulic prop 11 as a shed leg to tilt to support the shed, digging a beam pit at the wall side of the solid coal body of the two sides, extending two ends of the round log 9 into the beam pit, filling a coal bag in the gap between the round log 9 and the beam pit, and then twisting the top beam in a 'well' shape by using the round log 9;
the second step is that: the method comprises the following steps of (1) performing top twisting 1300mm and bottom laying 1300mm, filling two anchor rods, using a round timber 9 as a top beam, using a single hydraulic prop 11 as a shed leg to tilt to support a shed, digging a beam pit at the wall side of a solid coal body of two sides, extending two ends of the round timber 9 into the beam pit, filling a coal bag in a gap between the round timber 9 and the beam pit, and performing top twisting by using the round timber 9 in a 'well' shape on the top beam;
the third step: and (3) laying 1000mm at the bottom, filling two anchor rods, erecting a leaning shed by using a single hydraulic prop 11 and matching with a 4m pi-shaped beam 12, namely one beam and four columns, and jacking the pi-shaped beam 12 in a shape of a Chinese character 'jing' by using a log 9 for 1000 mm.
The working principle of the invention is as follows: and reinforcing the original U-shaped arch top beam 2 for supporting the top coal. The method comprises the following steps that a U-shaped arch top beam 2 is reinforced on an advanced working surface, three rows of anchor cable support beams 8 are arranged in an arch mining roadway along the direction of the roadway to reinforce the U-shaped arch top beam 2, and the distance between a reinforcing support and the advanced support of the working surface is not less than 60 m;
removing the U-shaped arch shed legs 3: two shed legs of a U-shaped arch are detached from an advanced working face in an arch-shaped stoping roadway, and a single hydraulic prop 11 is adopted to temporarily strengthen support according to the completeness of top coal, so that the phenomenon that the top coal falls down due to excessive crushing is avoided, and the distance between the detached shed legs and the advanced support of the working face is not less than 50 m;
repairing and drilling two anchor rods: after the U-shaped arch shed legs 3 are removed, anchor rods are arranged on the solid coal sides below the U-shaped arch clamping cables 4 for reinforcing support;
bottom-laying and top-laying: the advanced working face is 40m, the arch-type stoping roadway is subjected to bottom-lying top twisting, and after bottom lying, advanced support is carried out by using a U-shaped arch top beam 2, an anchor net cable, a wood buttress 10, a Pi-shaped beam 12 and a single hydraulic prop 11; when in top twisting, a single hydraulic prop 11 is matched with a pi-shaped beam 12 to erect a leaning shed, and a round wood 9 is used for top twisting on a top beam in a shape of a Chinese character 'jing'; if the bottom is deep, the top can be stranded, and the depth of the bottom and the height of the top can be adjusted according to the thickness of the bottom coal on site.
The original supporting structure of the arch stoping roadway is as follows: the upper end and the lower end of a coal seam 1 are respectively and horizontally provided with a top plate 15 and a bottom plate 16, a roadway longitudinally penetrates through the middle position of the coal seam, the upper end of the roadway is provided with a U-shaped arch top beam 2, the lower end of the U-shaped arch top beam 2 is symmetrically provided with U-shaped arch legs 3 matched with the roadway, and the U-shaped arch top beams 2 and the U-shaped arch top beams 3 are connected through clamping cables 4;
example 1
The structure after the arch-shaped stoping roadway is supported by the reinforced top beam is as follows: the upper end of the U-shaped arch top beam 2 is provided with an anchor cable 7 in an equal-angle upward penetrating mode, and the lower end of the anchor cable 7 extends into the U-shaped arch top beam 2 and is provided with an anchor cable supporting beam 8;
example 2
The structure after the first horizontal bottom twisting top support of the arch-shaped stoping roadway is as follows: an upper roadway wall 13 and a lower roadway wall 14 are respectively vertically and downwardly arranged on two sides of the U-shaped arch top beam 2, the upper roadway wall 13 and the lower roadway wall 14 uniformly extend into the coal seam 1 and are provided with a plurality of screw steel anchor rods 6, the bottom of the roadway is upwardly provided with a plurality of battens 10 by matching a single hydraulic prop 11 with the U-shaped arch top beam 2, and a plurality of logs 9 are vertically arranged in a longitudinal space between the battens 10;
example 3
The structure after the arch-shaped stoping roadway is supported by the horizontal bottom and the hinged top for the second time is as follows: the number of the round timbers 9, the wood cribs 10 and the glass fiber reinforced plastic anchor rods 5 is increased on the basis of the first horizontal bottom twisting top support of the arch-shaped stoping roadway;
the invention effectively solves the supporting problem of the thick coal seam top coal supporting ultrahigh stoping roadway, realizes the stoping of the working face along the bottom, improves the recovery of coal resources and has good social and economic benefits.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (2)
1. A supporting method of an ultrahigh stoping roadway containing top supporting coal and applied to a thick coal seam is characterized by comprising a coal seam (1), U-shaped arch top beams (2), U-shaped arch shed legs (3), clamping cables (4), deformed steel bar anchor rods (6), glass steel anchor rods (5), anchor cables (7), anchor cable supporting beams (8), logs (9), wood piles (10), single hydraulic supports (11), pi-shaped beams (12), roadway upper walls (13), roadway lower walls (14), a bottom plate (15) and a top plate (16); the method comprises the following steps:
1) strengthen former support top coal U type arched girder (2), advance working face 60m and consolidate U type arched girder (2), set up three rows of anchor rope joist (8) and consolidate U type arched girder (2) along the tunnel trend in arched stoping tunnel, let anchor rope (7) suspend in midair in the stable rock stratum of roof (16), do respectively: the first row is arranged along the center line of the roadway, the second row is arranged deviated to the upper wall (13) of the roadway, and the third row is arranged deviated to the lower wall (14) of the roadway;
2) removing the U-shaped arch shed legs (3) and the front working face of 50m, removing two shed legs of the U-shaped arch on the front working face in the arch-shaped stoping roadway, and temporarily reinforcing support by adopting a single hydraulic prop (11) according to the integrity of the top coal, thereby avoiding the top coal from falling due to excessive crushing;
3) repairing and drilling anchor rods at two sides, after removing the U-shaped arch shed legs (3), drilling anchor rods below the U-shaped arch clamping cables (4) to strengthen support, using glass fiber reinforced plastic anchor rods (5) at the upper side of the roadway (13), and using screw-thread steel anchor rods (6) at the lower side of the roadway (14);
4) the method comprises the following steps of, performing bottom-lying top twisting on an arch-type stoping roadway with a front working face of 40m, performing bottom-lying top twisting on the arch-type stoping roadway, wherein the net width of the original arch-type stoping roadway before bottom-lying is 4600mm, the net height is 3500mm, and after bottom-lying, filling two anchor rods, and then performing advanced support on the roadway by using a U-shaped arch top beam (2), an anchor net cable, a wood buttress (10), a Pi-shaped beam (12) and a single hydraulic prop (11); after the bottom is laid, the net width of the arch-shaped stoping roadway is 4600mm, the net height is 6200mm, the arch-shaped stoping roadway is changed into an ultrahigh roadway, the stoping of the working face along the bottom plate (15) is realized, and the recovery rate of coal resources is improved;
5) when the top is twisted, the inclined shed is erected by using the single hydraulic prop 11 to be matched with the pi-shaped beam (12), the top beam is in a shape like a Chinese character 'jing' and is twisted by using the log (9), and the bottom twisting is carried out for three times because the bottom is deeper, and the method comprises the following specific steps:
the first step is as follows: twisting and jacking 1700mm, laying 400mm at the bottom, filling two anchor rods, using a log (9) as a top beam, using a single hydraulic prop (11) as a shed leg to tilt and support the shed, digging a beam pit at the wall side of a solid coal body of the two sides, extending two ends of the log (9) into the beam pit, filling a coal bag in a gap between the log (9) and the beam pit, and then twisting and jacking the log (9) on the top beam in a shape of a Chinese character 'jing';
the second step is that: the method comprises the steps of (1) performing top twisting 1300mm and bottom laying 1300mm, filling two anchor rods, using a log (9) as a top beam, using a single hydraulic prop (11) as a shed leg to tilt a supporting shed, digging a beam pit on the wall side of a solid coal body of the two sides, extending two ends of the log (9) into the beam pit, filling a coal bag in a gap between the log (9) and the beam pit, and performing top twisting by using the log (9) in a shape of a Chinese character 'jing' on the top beam;
the third step: and (2) laying 1000mm at the bottom, filling two anchor rods, erecting a leaning shed by using a single hydraulic prop (11) to match with a 4m pi-shaped beam (12) to form a one-beam four-column structure, and jacking the pi-shaped beam (12) in a 'well' shape by using a log (9) for 1000 mm.
2. The method for supporting the ultrahigh-mining roadway containing the top-supported coal applied to the thick coal seam according to claim 1, wherein the length of the anchor rope joist (8) is 2200mm, the hole pitch of the anchor rope (7) is 1200mm, and the specification of the anchor rope (7) is phi 21.6 x 9500 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810699756.8A CN108798723B (en) | 2018-06-29 | 2018-06-29 | Support-top-coal-containing ultrahigh-mining roadway support method applied to thick coal seam |
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| CN201810699756.8A CN108798723B (en) | 2018-06-29 | 2018-06-29 | Support-top-coal-containing ultrahigh-mining roadway support method applied to thick coal seam |
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| CN109630168A (en) * | 2019-01-31 | 2019-04-16 | 淮北矿业股份有限公司 | Comprehensive extracting and caving face tunnel is arranged along floor strata and support pattern |
| CN110159316B (en) * | 2019-06-24 | 2023-08-22 | 河南理工大学 | Device and method for pocket filling roof protection of large-section ultra-high stope roadway |
| CN110725708B (en) * | 2019-10-10 | 2020-10-30 | 三峡大学 | Structure and method for reinforcing integrity and stability of tunnel surrounding rock by using cable |
| CN111622267A (en) * | 2020-05-29 | 2020-09-04 | 中国电建集团中南勘测设计研究院有限公司 | Vertical shaft structure and construction method thereof |
| CN113006816B (en) * | 2021-04-29 | 2023-09-19 | 山西天地王坡煤业有限公司 | Temporary roof-connecting supporting device and construction method |
| CN113669095A (en) * | 2021-08-02 | 2021-11-19 | 中国矿业大学 | Advanced support method applied to ultra-high section of mining roadway |
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| FR2328103A1 (en) * | 1975-10-17 | 1977-05-13 | Bochumer Eisen Heintzmann | Mine gallery support system - has sets of channels with straight and curved portions to match contour of sides |
| CN105370307B (en) * | 2015-10-08 | 2018-12-11 | 山西晋城无烟煤矿业集团有限责任公司 | Coal working face crosses freeboard section support process |
| CN106121684B (en) * | 2016-08-17 | 2018-11-30 | 国投新集能源股份有限公司 | A kind of construction method of jacking coal and rock suspension device |
| CN106640148B (en) * | 2016-12-27 | 2018-11-30 | 山西晋城无烟煤矿业集团有限责任公司 | Underground coal mine superelevation tunnel permanent reinforcement technique |
| CN107165664B (en) * | 2017-07-11 | 2019-04-30 | 河南理工大学 | A kind of slope thick seam edge top driving lane superelevation stope drift active workings Qie Dingliu method |
| CN207332902U (en) * | 2017-08-01 | 2018-05-08 | 令狐继耀 | A kind of colliery tunnel support structure |
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