CN112576283A - Gangue blocking column outward-swinging preventing structure based on gob-side entry retaining and construction method thereof - Google Patents
Gangue blocking column outward-swinging preventing structure based on gob-side entry retaining and construction method thereof Download PDFInfo
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- CN112576283A CN112576283A CN202011549579.9A CN202011549579A CN112576283A CN 112576283 A CN112576283 A CN 112576283A CN 202011549579 A CN202011549579 A CN 202011549579A CN 112576283 A CN112576283 A CN 112576283A
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- hole
- sleeve
- gangue
- goaf
- gob
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- 238000010276 construction Methods 0.000 title claims abstract description 31
- 230000000903 blocking effect Effects 0.000 title claims abstract description 27
- 239000010878 waste rock Substances 0.000 claims abstract description 40
- 239000002184 metal Substances 0.000 claims abstract description 31
- 229910052751 metal Inorganic materials 0.000 claims abstract description 31
- 238000005553 drilling Methods 0.000 claims abstract description 25
- 239000004744 fabric Substances 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 230000002265 prevention Effects 0.000 claims abstract description 8
- 239000011435 rock Substances 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000005065 mining Methods 0.000 claims description 6
- 239000002360 explosive Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 11
- 238000001125 extrusion Methods 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 7
- 238000004873 anchoring Methods 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 101150086005 gob-1 gene Proteins 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/025—Grouting with organic components, e.g. resin
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/04—Air ducts
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a waste rock blocking column outward swing prevention structure based on gob-side entry retaining and a construction method thereof, wherein the waste rock blocking column outward swing prevention structure comprises a pull rod, the pull rod is connected to a waste rock blocking column, a drawing through hole is formed in the pull rod, a drill hole is formed in the bottom end of a gob through the drawing through hole, the drill hole is obliquely arranged, a sleeve is inserted into the drill hole, the outer side wall of the sleeve is bonded with the inner side wall of the drill hole, an anchor cable is inserted into the sleeve, and the sleeve is bonded with the anchor cable, and the construction method comprises the following steps: s1, erecting air duct cloth and metal nets on the edges of the goaf; s2, erecting gangue blocking columns and arranging pull rods; s3, drilling a hole in the waste rock section of the goaf by drawing the through hole, placing a resin cartridge in the hole, inserting a sleeve into the hole, and bonding the sleeve with the hole wall of the hole; s4, continuously drilling in the bottom plate rock stratum of the goaf in the sleeve, inserting an anchor cable and a resin cartridge, and bonding the anchor cable, the sleeve and the hole wall of the drilled hole; and S5, installing a tray and a lock at the tail end of the anchor cable.
Description
Technical Field
The invention relates to the field of coal mining, in particular to a gangue blocking column outward swinging prevention structure based on gob-side entry retaining and a construction method thereof.
Background
Coal is the first major energy system in China, but as the mining life increases, the coal resources are gradually reduced. The method of gob-side entry retaining is mostly adopted at home and abroad to realize the coal pillar-free exploitation and improve the exploitation rate of underground coal. The gob-side entry retaining technology generally adopts filling type support on one side of a goaf, and comprises high-water rapid-hardening material, soft-grinding concrete vehicle support and the like. The technology of the invention is based on roof cutting and pressure relief gob-side entry retaining, which cuts off a roadway and a top plate of a working face by means of blasting and the like, and resists the falling waste rocks of a goaf from rolling down into the roadway by using U-shaped steel, air duct cloth and a diamond net after the working face is pushed. When using the shelves waste rock post to strut, because the goaf roof caving waste rock compaction gradually, the waste rock of lower part receives the extrusion effect and easily extrudees to the tunnel in, the condition of footing outward swing appears, seriously influences roadway width and shelves waste rock effect, and it can cause the goaf of certain degree to leak out simultaneously, and the effect that the roof was supported to the shelves waste rock post also greatly reduced.
Disclosure of Invention
The invention aims to solve the problems and provides a gangue stopping column outward-swinging preventing structure based on a gob-side entry retaining and a construction method thereof, wherein the gangue stopping column outward-swinging preventing structure is simple in structure and convenient to operate.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a waste rock blocking column outward-swinging prevention structure based on a gob-side entry retaining comprises a plurality of waste rock blocking columns, metal nets, air duct cloth, pull rods, sleeves, anchor cables, trays and locks, wherein the plurality of waste rock blocking columns are arranged on one side, close to a goaf, of a roadway at equal intervals along the length direction of the roadway, the waste rock blocking columns are arranged perpendicular to the ground, the pull rods are connected between adjacent waste rock blocking columns, one side, close to the goaf, of each waste rock blocking column is connected with the air duct cloth, one side, close to the goaf, of the air duct cloth is provided with the metal nets, and the metal nets are connected with the waste rock blocking columns; the mining goaf drilling device is characterized in that a drawing through hole is formed in the pull rod, a drill hole is formed in the bottom end of the goaf through the drawing through hole, the drill hole is arranged in an inclined mode, a sleeve is inserted into the drill hole, the outer side wall of the sleeve is bonded with the inner side wall of the drill hole, an anchor rope is inserted into the sleeve and bonded with the sleeve, one end of the anchor rope penetrates out of the drawing through hole and then is connected with a lock, a tray is connected to the outer side of the end of the anchor.
Furthermore, the waste rock blocking column is made of U-shaped steel.
Further, the metal net is of a double-layer structure.
Furthermore, the outer side wall of the sleeve and the inner side wall of the drilled hole and the sleeve and the anchor cable are bonded by resin explosive rolls.
Further, the angle of inclination of the bore relative to the horizontal is greater than 10 ° and not more than 20 °.
A construction method of a waste rock blocking column outward-swinging prevention structure based on gob-side entry retaining is characterized by comprising the following steps: the method comprises the following steps:
s1, erecting air duct cloth and metal nets on the edges of the goaf;
s2, erecting a gangue blocking column, and horizontally arranging pull rods on the upper part and the lower part of the gangue blocking column respectively, wherein a pulling through hole is reserved on the pull rod positioned on the lower part of the gangue blocking column;
s3, drilling a hole in the waste rock section of the goaf by drawing the through hole, placing a resin cartridge in the hole, inserting a sleeve into the hole, and bonding the sleeve with the hole wall of the hole;
s4, continuously drilling a hole in the bottom plate rock stratum of the goaf in the sleeve, inserting one end of the anchor cable into the hole after penetrating through the sleeve, and simultaneously inserting a resin cartridge to bond the anchor cable, the sleeve and the hole wall of the hole;
and S5, after the anchor cables are bonded, tensioning the anchor cables by using a tensioning device at the outer side of the traction through hole, and quickly installing a tray and a lock on the anchor cables.
Furthermore, the exposed length of the tail end of the anchor cable is not more than 300mm, and the exposed end is sleeved with a rubber hose.
Compared with the prior art, the invention has the advantages and positive effects that:
according to the invention, the air duct cloth and the metal net are arranged on one side of the waste rock retaining column to serve as a blocking effect beside a roadway, so that on one hand, toxic and harmful gas in a goaf is prevented from escaping to the roadway, and on the other hand, small pieces of waste rock are prevented from rolling to the roadway due to the extrusion effect, and personnel injury is avoided; meanwhile, by adopting the design of obliquely drilling down an anchor cable hole in the goaf and arranging the anchor cable in the hole for traction, the stable effect of the waste rock column can be improved, the situation that the waste rock column swings outwards under the extrusion of the waste rock is avoided, and the sleeve is well bonded with the wall of the hole of the waste rock section through the design of bonding the sleeve in the hole, the phenomenon of hole collapse caused by the rolling extrusion of the waste rock is avoided, the construction efficiency of the anchor cable fixing operation is improved, and the use effect of the anchor cable fixing device is further improved;
the construction method is implemented based on the roadside construction process of the roof-cutting pressure-relief gob-side entry retaining, and solves the problem that the bottom foot of the gangue column is seriously swung outwards in construction and later effects, so that the problems of narrow roadway width, no stress on gangue column support and the like caused by the swinging outwards of the bottom foot are effectively solved, and convenience is brought to roadside construction operation of the roof-cutting pressure-relief gob-side entry retaining.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a side view of the overall structure of the present invention;
FIG. 2 is a right side view structural diagram of FIG. 1;
FIG. 3 is a diagram of the connection structure of the borehole wall, anchoring agent and casing.
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 from the embodiments of the present invention by a person skilled in the art without any creative effort, should be included in the protection scope of the present invention.
As shown in fig. 1, 2 and 3, the gob-side entry retaining based gangue column outward-swinging prevention structure in the present embodiment includes gangue columns 4, metal nets 6, air duct cloth 5, pull rods 13, sleeves 11, anchor cables 8, trays 10 and locks 9, wherein the gangue columns 4 are provided with a plurality of pieces, when the height of the gangue columns 4 needs to be increased, two gangue columns 4 can be overlapped by using metal clamp cables 7 and fixing bolts 12, the plurality of gangue columns 4 are arranged on one side of the roadway 2 close to the gob 1 at equal intervals along the length direction of the roadway 2, the gangue columns 4 are arranged perpendicular to the ground 3, the bottom ends of the gangue columns 4 are inserted into the ground 3, the pull rods 13 are connected between adjacent gangue columns 4, one side of the gangue columns 4 close to the gob 1 is connected with the air duct cloth 5, one side of the air duct cloth 5 close to the gob 1 is provided with the metal nets 6, and the gangue columns 4 are connected with the metal nets 6; the drawing through hole 1301 is formed in the pull rod 13, a drill hole 14 is formed in the bottom end of the goaf 1 through the drawing through hole 1301, the drill hole 14 is obliquely arranged, a sleeve 11 is inserted into the drill hole 14, the outer side wall of the sleeve 11 is bonded with the inner side wall of the drill hole 14, an anchor rope 8 is inserted into the sleeve 11, the sleeve 11 is bonded with the anchor rope 8, one end of the anchor rope 8 penetrates out of the drawing through hole and then is connected with the lock 9, a tray 10 is sleeved on the outer side of the end, and the tray 10 is in contact with one side, far away from.
The anchor cable is preferably a high-strength anchor cable, so that on one hand, the anchor cable can bear larger tensile stress of the anchoring end to the bottom leg of the stop lever column, and on the other hand, the anchor cable needs to bear the damage of complex stress formed by the falling waste rock of the top plate of the goaf to the anchor cable in the rolling process, so that the anchor cable also needs to have better flexibility and is not easy to break after the waste rock acts; the anchor cable tray is a mining standard butterfly-shaped steel tray, the specification size is not less than 150mm multiplied by 150mm (square) or the diameter is 50mm (circular), and if a flat tray is selected, the thickness size is not less than 15 mm. The diameter of the central hole of the tray is larger than the nominal diameter of the steel strand by 2-4 mm, and the bearing capacity of the tray is not less than 1.5 times of the designed bearing capacity of the anchor cable; the waste rock blocking column 4 is 36U-shaped steel, two metal clamping cables 7 are used for lap joint, and the lap joint length is not less than 500 mm; the metal net is a rectangular net woven by metal wires with the diameter of 4mm, the specification is 3200mm multiplied by 900 mm/piece, the mesh is 50mm multiplied by 50mm, the metal net is arranged in a double-layer mode, and the lap joint length is 100 mm; the air duct cloth is used for mining, is arranged in a manner of being tightly attached to the metal net before the gangue-blocking U-shaped steel is erected, and is mutually lapped for preventing air leakage of the roadway retaining section; the length of the rubber (metal) sleeve needs to be slightly greater than that of a drilling gangue section, the rubber (metal) sleeve is used for reinforcing an anchor cable hole and preventing gangue from rolling off after drilling construction to close the drilling hole, and the outer wall of the sleeve is uniformly smeared by adopting a resin explosive roll and is well bonded with the wall of the drilling hole of the gangue section; the metal pull rod is used for connecting two waste rock blocking columns, and a reserved hole which is suitable for construction is required to be arranged in the middle of the metal pull rod; the anchor cable drilling machine can meet the requirement of drilling in a downward inclined construction mode, the diameter of a drilled hole is about 1.5 times of that of an anchor cable, and the drilling depth can ensure that the anchoring end of the anchor cable is located in a stable rock stratum of a bottom plate; the angle of inclination of the bore relative to the horizontal is greater than 10 ° and not more than 20 °.
When the gangue column outward-swinging prevention structure is constructed, firstly, a metal net 6, a wind barrel cloth 5 and a gangue column 4 are arranged on one side, close to a goaf 1, of a gob-side entry retaining, a pull rod 13 is connected to the gangue column 4, then a drilling hole 14 is obliquely constructed downwards to the goaf through a drawing through hole reserved in the middle of the metal pull rod by using a proper anchor cable drilling machine, wherein a section where gangue falls is selected in a construction site, secondary fall cannot occur to a top plate of the goaf 1 in a short time, and construction is strictly carried out according to an inclination angle and depth during drilling construction. The drilling construction is divided into two stages, in the first stage, the hole is drilled in the goaf gangue section, after the construction is finished, the resin anchoring cartridge 15 is placed in the drilled hole and fully stirred to be fully bonded with the hole wall, the rubber (metal) sleeve 11 is placed in the goaf gangue section of the drilled hole 14, and when the rubber (metal) sleeve 11 is well bonded with the hole wall of the goaf section drilled hole 14.
And then, performing second-stage construction of a drill hole 14, continuously performing construction drilling on the bottom plate rock stratum 3 of the gob 1 to the estimated depth through the gob gangue section drill hole in the first stage, quickly poking the resin anchoring cartridge 15 and the anchor cable 8 into the bottom of the drill hole, fully and uniformly stirring the resin anchoring cartridge 15 by rotating the anchor cable 8 by using an anchor cable drilling machine, and waiting for the cartridge to firmly adhere the anchor cable 8 and the hole wall of the drill hole 14. Before drilling construction begins, operators firstly straighten wind and water pipes and pull the pipes to a construction site, and then open a wind and water valve to blow the wind and water pipelines so as to prevent blockage and ensure the pipelines to be smooth; before punching, the air pipe is firmly connected with the anchor cable drilling machine by using a standard U-shaped clamp, an air valve and a water valve are opened, and operation can be carried out after normal trial operation; iron wires are strictly forbidden to replace U-shaped cards.
And (3) performing subsequent procedures on the anchored anchor cable 8, placing a butterfly-shaped tray 10 on the surface of the metal pull rod 13 through the tail part of the anchor cable, placing a lock 9 in the butterfly-shaped tray 10, and tensioning the anchor cable by using a tensioning machine to achieve the specified torque. And after tensioning is finished, measuring the exposed length of the anchor cable, cutting off the redundant part by using a hydraulic cutter which does not meet the standard, and sleeving a rubber sleeve to prevent the worker from being scratched.
According to the invention, the air duct cloth and the metal net are arranged on one side of the waste rock retaining column to serve as a blocking effect beside a roadway, so that on one hand, toxic and harmful gas in a goaf is prevented from escaping to the roadway, and on the other hand, small pieces of waste rock are prevented from rolling to the roadway due to the extrusion effect, and personnel injury is avoided; meanwhile, by adopting the design of obliquely drilling down an anchor cable hole in the goaf and arranging the anchor cable in the hole for traction, the stable effect of the waste rock column can be improved, the situation that the waste rock column swings outwards under the extrusion of the waste rock is avoided, and the sleeve is well bonded with the wall of the hole of the waste rock section through the design of bonding the sleeve in the hole, the phenomenon of hole collapse caused by the rolling extrusion of the waste rock is avoided, the construction efficiency of the anchor cable fixing operation is improved, and the use effect of the anchor cable fixing device is further improved;
the construction method is implemented based on the roadside construction process of the roof-cutting pressure-relief gob-side entry retaining, and solves the problem that the bottom foot of the gangue column is seriously swung outwards in construction and later effects, so that the problems of narrow roadway width, no stress on gangue column support and the like caused by the swinging outwards of the bottom foot are effectively solved, and convenience is brought to roadside construction operation of the roof-cutting pressure-relief gob-side entry retaining.
Claims (7)
1. The utility model provides a shelves waste rock post prevents outer pendulum structure based on gob entry which characterized in that: the gangue column outward-swinging prevention structure comprises gangue columns, metal nets, air duct cloth, pull rods, sleeves, anchor cables, trays and locks, wherein the plurality of gangue columns are arranged on one side of a roadway close to a goaf at equal intervals along the length direction of the roadway, the gangue columns are arranged perpendicular to the ground, the pull rods are connected between adjacent gangue columns, the air duct cloth is connected to one side of each gangue column close to the goaf, the metal nets are arranged on one sides of the air duct cloth close to the goaf, and the metal nets are connected with the gangue columns; the mining goaf drilling device is characterized in that a drawing through hole is formed in the pull rod, a drill hole is formed in the bottom end of the goaf through the drawing through hole, the drill hole is arranged in an inclined mode, a sleeve is inserted into the drill hole, the outer side wall of the sleeve is bonded with the inner side wall of the drill hole, an anchor rope is inserted into the sleeve and bonded with the sleeve, one end of the anchor rope penetrates out of the drawing through hole and then is connected with a lock, a tray is connected to the outer side of the end of the anchor.
2. The gangue column outward-swinging preventing structure based on the gob-side entry retaining of claim 1, which comprises: the waste rock blocking column is made of U-shaped steel.
3. The gangue column outward-swinging preventing structure based on the gob-side entry retaining of claim 2, wherein: the metal net is of a double-layer structure.
4. The gangue column outward-swinging preventing structure based on the gob-side entry retaining of claim 3, wherein: and the outer side wall of the sleeve and the inner side wall of the drilled hole and the sleeve and the anchor cable are bonded by resin explosive rolls.
5. The gangue column outward-swinging preventing structure based on the gob-side entry retaining of claim 4, wherein: the angle of inclination of the bore relative to the horizontal is greater than 10 ° and not more than 20 °.
6. The construction method of the gangue column outward-swing-preventing structure based on the gob-side entry retaining according to claim 1, characterized by comprising the following steps: the method comprises the following steps:
s1, erecting air duct cloth and metal nets on the edges of the goaf;
s2, erecting a gangue blocking column, and horizontally arranging pull rods on the upper part and the lower part of the gangue blocking column respectively, wherein a pulling through hole is reserved on the pull rod positioned on the lower part of the gangue blocking column;
s3, drilling a hole in the waste rock section of the goaf by drawing the through hole, placing a resin cartridge in the hole, inserting a sleeve into the hole, and bonding the sleeve with the hole wall of the hole;
s4, continuously drilling a hole in the bottom plate rock stratum of the goaf in the sleeve, inserting one end of the anchor cable into the hole after penetrating through the sleeve, and simultaneously inserting a resin cartridge to bond the anchor cable, the sleeve and the hole wall of the hole;
and S5, after the anchor cables are bonded, tensioning the anchor cables by using a tensioning device at the outer side of the traction through hole, and quickly installing a tray and a lock on the anchor cables.
7. The construction method of the gangue stopping column outward-swinging preventing structure based on the gob-side entry retaining of claim 6, characterized by comprising the following steps: the exposed length of the tail end of the anchor cable is not more than 300mm, and the exposed end is sleeved with a rubber hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011549579.9A CN112576283A (en) | 2020-12-24 | 2020-12-24 | Gangue blocking column outward-swinging preventing structure based on gob-side entry retaining and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011549579.9A CN112576283A (en) | 2020-12-24 | 2020-12-24 | Gangue blocking column outward-swinging preventing structure based on gob-side entry retaining and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112576283A true CN112576283A (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011549579.9A Pending CN112576283A (en) | 2020-12-24 | 2020-12-24 | Gangue blocking column outward-swinging preventing structure based on gob-side entry retaining and construction method thereof |
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| CN (1) | CN112576283A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864987A (en) * | 2010-06-13 | 2010-10-20 | 中国矿业大学 | Building method of filled wall body for gob-side entry retaining of large-inclination coal seam |
| CN203925576U (en) * | 2014-05-15 | 2014-11-05 | 山东科技大学 | The gob-side entry retaining support structure of utilizing erecting dense individual props spoil to construct |
| CN108222014A (en) * | 2018-01-17 | 2018-06-29 | 启东市建筑设计院有限公司 | A kind of rock bolt device and the foundation pit supporting construction with the device |
| CN207633348U (en) * | 2017-12-12 | 2018-07-20 | 启东市建筑设计院有限公司 | A kind of anchored agitation pile supporting construction |
| CN109915138A (en) * | 2019-03-26 | 2019-06-21 | 中国矿业大学(北京) | Spontaneous fire seam cuts top self-contained lane without pillar mining method |
| CN110206542A (en) * | 2019-04-16 | 2019-09-06 | 中国矿业大学(北京) | Suitable for mining in combined mining thick coal seam Sub-Level Caving without coal column self-contained lane recovery method |
| CN211257011U (en) * | 2019-12-02 | 2020-08-14 | 韶关市第一建筑工程有限公司 | Triaxial stirring stake stagnant water curtain structure |
-
2020
- 2020-12-24 CN CN202011549579.9A patent/CN112576283A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864987A (en) * | 2010-06-13 | 2010-10-20 | 中国矿业大学 | Building method of filled wall body for gob-side entry retaining of large-inclination coal seam |
| CN203925576U (en) * | 2014-05-15 | 2014-11-05 | 山东科技大学 | The gob-side entry retaining support structure of utilizing erecting dense individual props spoil to construct |
| CN207633348U (en) * | 2017-12-12 | 2018-07-20 | 启东市建筑设计院有限公司 | A kind of anchored agitation pile supporting construction |
| CN108222014A (en) * | 2018-01-17 | 2018-06-29 | 启东市建筑设计院有限公司 | A kind of rock bolt device and the foundation pit supporting construction with the device |
| CN109915138A (en) * | 2019-03-26 | 2019-06-21 | 中国矿业大学(北京) | Spontaneous fire seam cuts top self-contained lane without pillar mining method |
| CN110206542A (en) * | 2019-04-16 | 2019-09-06 | 中国矿业大学(北京) | Suitable for mining in combined mining thick coal seam Sub-Level Caving without coal column self-contained lane recovery method |
| CN211257011U (en) * | 2019-12-02 | 2020-08-14 | 韶关市第一建筑工程有限公司 | Triaxial stirring stake stagnant water curtain structure |
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