CN112160785B - Rapid reinforcement pouring method for coal mine underground overpass - Google Patents
Rapid reinforcement pouring method for coal mine underground overpass Download PDFInfo
- Publication number
- CN112160785B CN112160785B CN202011049115.1A CN202011049115A CN112160785B CN 112160785 B CN112160785 B CN 112160785B CN 202011049115 A CN202011049115 A CN 202011049115A CN 112160785 B CN112160785 B CN 112160785B
- Authority
- CN
- China
- Prior art keywords
- interchange
- roadway
- tunnel
- pouring
- overpass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000002787 reinforcement Effects 0.000 title claims abstract description 18
- 239000003245 coal Substances 0.000 title claims abstract description 17
- 238000010276 construction Methods 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 32
- 239000010959 steel Substances 0.000 claims description 32
- 238000005065 mining Methods 0.000 claims description 15
- 230000003014 reinforcing effect Effects 0.000 claims description 14
- 239000002023 wood Substances 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 7
- 230000005641 tunneling Effects 0.000 claims description 5
- 238000005266 casting Methods 0.000 abstract description 7
- 238000007796 conventional method Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- 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
- E21F1/006—Ventilation at the working face of galleries or tunnels
-
- 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the technical field of underground construction of coal mines, in particular to a rapid reinforcement pouring method for an underground coal mine interchange air bridge, which specifically comprises a reinforcement method and a pouring method, and is characterized in that two side edges of a tunnel at the lower part of an interchange are respectively provided with a cut inwards from the tunnel wall of the tunnel at the lower part of the interchange at the position close to the top plate of the tunnel at the lower part of the interchange; the casting method is based on a reinforcement method. Compared with the conventional method, the method has the advantages of small engineering quantity and short construction period; saving manpower and material resources.
Description
Technical Field
The invention relates to the technical field of underground coal mine construction, in particular to a rapid reinforcing and pouring method for an underground coal mine overpass.
Background
In an underground coal mine, a mining area main roadway basically adopts a centralized arrangement mode, and after each system of the mining area is put into operation, an air inlet and return air gate of a working face is started to form each system of working face ventilation and the like, so that the system is used for coal production. Under normal conditions, the air inlet gate is directly driven from the air inlet main roadway of the mining area, the air return gate is driven from the door opening in the air return main roadway of the mining area, and the opening section of the air return gate needs to pass through the roof strata of the air return main roadway of the mining area. This forms an air intake and return interchange: firstly, before the intersection of a tunneling return air gate and a mining area main roadway, an I-shaped steel shed is required to be supported in the mining area main roadway at the intersection for reinforcement; and secondly, after the opening section of the return air cis-slot is excavated, an overpass is required to be constructed to separate the inlet air from the return air.
The conventional reinforcing method for the construction of the overpass comprises the following steps: firstly, opening sides in 8 m ranges of two sides of a roadway at the lower part of an interchange, wherein the depth of the opening sides is 0.9 m, the height of the opening sides is consistent with the height of a top plate of a large roadway of a mining area, and the newly-disclosed roadway sides are reinforced and supported by adopting an anchor net supporting mode; secondly, the tunnel at the lower part of the interchange needs to be lifted, the lifting depth is more than 0.32 meter, and the lifting tunnel length is more than 10 meters; secondly, installing drainage facilities such as a water pump and the like to prevent accumulated water from soaking the roadway bottom plate; fourthly, closely arranging I-steel sheds (the I-steel sheds are made of 32# I-steel), wherein gaps between shed tops and roof boards of large roadways in the mining area are backed by wood back boards, and each shed is arranged, anchor rods for fixing shed legs are needed to be arranged, so that the stability of the I-steel sheds is improved; fifthly, 6 wood piles are supported between the I-steel shed roof and the bottom plate of the lower roadway of the interchange and are clung to shed legs, so that the bearing capacity and stability of the bottom plate of the upper roadway of the interchange are further improved.
At present, a conventional overpass casting method comprises the following steps: firstly, dismantling the I-shaped steel shed and cleaning coal gangue; secondly, supporting an upper template in an upper opening range of a roadway at the lower part of the interchange, and then pouring concrete to fill up the space of the previous upper opening; thirdly, after half a month, dismantling the upper part template, erecting the cross wind bridge template, and pouring concrete; fourth, after half a month, removing all templates at the overpass, cleaning residual coal gangue in the bottom rising range, pouring roadway bottom plates in the bottom rising range by using concrete, and recovering auxiliary transportation functions at the overpass still more than half a month.
The conventional pouring method has the problems that the top plate of the lower roadway of the interchange needs to be reinforced before the upper roadway of the interchange is tunneled by a tunneling machine, the additional project amount of the reinforcement is large, the labor intensity is high, the reinforcing and supporting cost is high, the construction period is longer, the anchor net supporting is carried out in a large-area side opening and side opening range, the bottom is lifted in a large area, and the I-steel sheds are closely arranged; on the other hand, when the overpass is poured, the concrete quantity is very large and the cost is high, and the reinforcing period and the pouring period of the overpass are long, so that the influence on an auxiliary transportation system is relatively large; in addition, the I-shaped steel frame shed has very high requirement on stability, and has a plurality of unsafe factors, thereby being unfavorable for safe production.
Disclosure of Invention
The invention aims to solve the problems in the casting of the existing coal mine underground overpass, and provides a rapid reinforcement casting method of the coal mine underground overpass.
The technical scheme adopted for solving the technical problems is as follows: a rapid reinforcement pouring method for an underground coal mine interchange wind bridge comprises the following steps of:
step one: digging a cut inwards from the tunnel wall of the lower tunnel of the interchange at the positions of the two side edges of the tunnel of the lower tunnel of the interchange, which are close to the top plate of the lower tunnel of the interchange, wherein the height of the cut is more than 0.35 meter, the depth is more than 0.5 meter, and the length is 8-10 meters;
setting an I-steel shed roof in the cut, and backing a gap between the I-steel shed roof and a top plate of a roadway at the lower part of the interchange by using a wooden back plate;
step three, arranging a plurality of wood piles below the I-steel shed roof on the basis of a bottom plate of a roadway at the lower part of the interchange, wherein the wood piles are tightly attached to the roadway side part;
after the opening section of the return air cis-slot is excavated, an interchange air bridge is constructed and used for separating the inlet air from the return air, and the pouring method in the construction process comprises the following steps:
removing the I-shaped steel shed roof, and cleaning gangue;
fifthly, expanding the upper opening area of the interchange according to a new design scheme, and setting a reinforcing anchor rod;
step six, erecting a template at the bottom of the cross wind bridge, and pouring concrete;
and seventhly, removing all templates at the overpass after half a month, and finishing pouring. And recovering the auxiliary transportation function.
The beneficial effects of the invention are as follows: (1) Compared with the existing conventional method, the rapid reinforcement method has the advantages that the reinforcement engineering quantity is obviously reduced, the opening quantity is less than 15% of the original opening quantity, and the labor intensity is obviously reduced; the anchor net support is not needed at the side opening position, the closely arranged shed tops do not need shed legs, and the input cost is obviously reduced; the construction period is short, the stability of the shed roof is high, and the operation safety coefficient is improved.
(2) Compared with the existing conventional method, the quick pouring method has the advantages that the concrete quantity used for pouring the overpass is low, and is only 33% of the original quantity; the whole casting period is short, and the influence on an auxiliary transportation system is obviously reduced, which is only about 34% of the original period.
Drawings
Fig. 1 is a schematic view of the construction structure of the present invention at the time of reinforcement.
Fig. 2 shows a schematic construction structure of the casting according to the present invention.
Fig. 3 is a schematic view showing a construction structure at the time of conventional reinforcement in the comparative example.
Fig. 4 is a schematic view showing a construction structure at the time of conventional casting in the comparative example.
In the figure: the roof is characterized by comprising an upper roadway top plate of an interchange 1, an upper roadway bottom plate of an interchange 2, a lower roadway top plate of an interchange 3, a lower roadway bottom plate of an interchange 4, 5 shed legs, 6 wooden piles, 7 pre-buried I-steel, 8 reinforcing anchor rods, 9 undercut and 10I-steel shed tops.
Detailed Description
Representative embodiments based on the drawings will now be further refined. In the following detailed description, reference is made to the accompanying drawings that form a part hereof, but which are not to be taken in a limiting sense.
Examples:
a rapid reinforcement pouring method for an underground coal mine interchange wind bridge comprises the following steps of:
step one: digging a cut inwards from the tunnel wall of the lower tunnel of the interchange at the positions of the two side edges of the tunnel of the lower tunnel of the interchange, wherein the height of the cut is more than 0.35 meter, the depth is 0.5 meter and the length is 8 meters;
setting an I-steel shed roof in the cut, and backing a gap between the I-steel shed roof and a top plate of a roadway at the lower part of the interchange by using a wooden back plate;
and thirdly, arranging a plurality of wood piles below the I-steel shed roof on the basis of a bottom plate of a roadway at the lower part of the interchange, wherein the wood piles are tightly attached to the roadway side part.
After the opening section of the return air cis-slot is excavated, an interchange air bridge is constructed and used for separating the inlet air from the return air, and the pouring method in the construction process comprises the following steps:
removing the I-shaped steel shed roof, and cleaning gangue;
fifthly, expanding the upper opening area of the interchange according to a new design scheme, and setting a reinforcing anchor rod; the concrete expansion scheme is that the expansion of the upper opening area at the intersection is specifically to expand the area of the cross section area outside the undercut; on one hand, the depth of the undercut is deepened, and then a part of the undercut is downwards opened outside the undercut, so that the section of the outside of the undercut is increased, the stability area is conveniently increased, and the anchoring of the anchor rod is conveniently reinforced;
step six, erecting a template at the bottom of the cross wind bridge, pouring concrete or embedding I-steel in the concrete;
and seventhly, removing all templates at the overpass after half a month, and finishing pouring to recover the auxiliary transportation function.
Comparative example:
at present, before the intersection of the tunneling return air gate and the large mining area roadway, reinforcing is carried out in the large mining area roadway at the intersection, and the reinforcing method comprises the following steps:
firstly, opening sides in 8 m ranges of two sides of a roadway at the lower part of an interchange, wherein the depth of the opening sides is 0.9 m, the height of the opening sides is consistent with the height of a top plate of a large roadway of a mining area, and the newly-disclosed roadway sides are reinforced and supported by adopting an anchor net supporting mode;
secondly, the tunnel at the lower part of the interchange needs to be lifted, the lifting depth is more than 0.32 meter, and the lifting tunnel length is more than 10 meters;
thirdly, installing drainage facilities such as a water pump and the like to prevent accumulated water from soaking the roadway bottom plate;
fourthly, closely arranging I-steel sheds (the I-steel sheds are made of 32# I-steel), wherein gaps between shed tops and roof boards of large roadways in the mining area are backed by wood back boards, and each shed is arranged, anchor rods for fixing shed legs are needed to be arranged, so that the stability of the I-steel sheds is improved; fifthly, 6 wooden piles are supported between the I-steel shed roof and the bottom plate of the lower roadway of the interchange and are closely attached to shed legs, so that the bearing capacity and stability of the bottom plate of the upper roadway of the interchange are further improved, and the wooden piles are arranged at intervals along the upper portion of the lower roadway of the interchange.
At present, after the opening section of the return air cis-slot is excavated, an interchange air bridge is constructed for separating the inlet air from the return air, and the conventional pouring method in the construction process comprises the following steps:
firstly, dismantling the I-shaped steel shed and cleaning coal gangue;
secondly, supporting an upper template in an upper opening range of a roadway at the lower part of the interchange, and then pouring concrete to fill up the space of the previous upper opening;
thirdly, after half a month, dismantling the upper part template, erecting the cross wind bridge template, and pouring concrete;
fourth, after half a month, removing all templates at the overpass, cleaning residual coal gangue in the bottom rising range, pouring roadway bottom plates in the bottom rising range by using concrete, and recovering auxiliary transportation functions at the overpass still more than half a month.
In the comparative example:
before tunneling the upper roadway of the interchange, the top plate of the lower roadway of the interchange needs to be reinforced, and the additional reinforcement engineering quantity is large, the labor intensity is high, the reinforcing and supporting cost is high, the construction period is longer, the anchor net supporting is carried out in the large-area side opening and side opposite opening range, the large-area bottom lifting is carried out, and the I-steel sheds are closely arranged;
when the overpass is poured, the concrete quantity is very large, the cost is high, and the reinforcing period and the pouring period of the overpass are long, so that the influence on an auxiliary transportation system is relatively large; in addition, the I-shaped steel frame shed has very high requirement on stability, and has a plurality of unsafe factors, which is unfavorable for safe production.
By comparison with the comparative examples, the protocol of the present application corresponds to:
the reinforcement engineering amount is obviously reduced by the method, wherein the opening amount is less than 15% of the original opening amount, and the labor intensity is obviously reduced; in addition, the method does not need to support an anchor net at the side opening part, and the closely arranged shed roof does not need shed legs, so that the input cost is obviously reduced; the reinforcement period is short, the stability of the shed roof is high, and the operation safety coefficient is improved.
When the overpass bridge is poured, the quick pouring method is adopted, the concrete quantity used for pouring the overpass bridge is low and is only 33% of the original quantity; the construction period is short, the influence on an auxiliary transportation system is also obviously reduced, and the construction period is only about 34% of the original period.
It will be apparent to those skilled in the art that the foregoing embodiments are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed. It will be apparent to those skilled in the art that certain modifications, combinations and variations are possible in light of the above teachings.
Claims (1)
1. A rapid reinforcement pouring method for an underground coal mine overpass is characterized in that:
before the intersection of the tunneling return air gate and the mining area main roadway, reinforcing the mining area main roadway at the intersection, wherein the reinforcing method comprises the following steps of:
step one: digging a cut inwards from the tunnel wall of the lower tunnel of the interchange at the positions of the two side edges of the tunnel of the lower tunnel of the interchange, which are close to the top plate of the lower tunnel of the interchange, wherein the height of the cut is more than 0.35 meter, the depth is more than 0.5 meter, and the length is 8-10 meters;
setting an I-steel shed roof in the cut, and backing a gap between the I-steel shed roof and a top plate of a roadway at the lower part of the interchange by using a wooden back plate;
step three, arranging a plurality of wood piles below the I-steel shed roof on the basis of a bottom plate of a roadway at the lower part of the interchange, wherein the wood piles are tightly attached to the roadway side part;
after the opening section of the return air cis-slot is excavated, an interchange air bridge is constructed and used for separating the inlet air from the return air, and the pouring method in the construction process comprises the following steps:
removing the I-shaped steel shed roof, and cleaning gangue;
fifthly, expanding the upper opening area of the interchange according to a new design scheme, and setting a reinforcing anchor rod;
step six, erecting a template at the bottom of the cross wind bridge, and pouring concrete;
step seven, removing all templates at the overpass after half a month, completing pouring, and recovering an auxiliary transportation function;
the wood piles are arranged at intervals along the roadway upper part at the lower part of the interchange; the expansion of the upper opening area at the intersection is specifically to expand the area of the cross section area outside the undercut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011049115.1A CN112160785B (en) | 2020-09-29 | 2020-09-29 | Rapid reinforcement pouring method for coal mine underground overpass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011049115.1A CN112160785B (en) | 2020-09-29 | 2020-09-29 | Rapid reinforcement pouring method for coal mine underground overpass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112160785A CN112160785A (en) | 2021-01-01 |
| CN112160785B true CN112160785B (en) | 2023-05-12 |
Family
ID=73860616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011049115.1A Active CN112160785B (en) | 2020-09-29 | 2020-09-29 | Rapid reinforcement pouring method for coal mine underground overpass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112160785B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863956B (en) * | 2021-09-24 | 2023-08-22 | 国家能源集团宁夏煤业有限责任公司 | Coal mine underground working face gateway roadway passing method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383820B (en) * | 2011-10-06 | 2016-05-25 | 山西晋城无烟煤矿业集团有限责任公司 | Coal mine underground airbridge construction method |
| CN102966365B (en) * | 2012-05-16 | 2015-04-08 | 山西晋城无烟煤矿业集团有限责任公司 | Novel air bridge construction method |
| CN103410550B (en) * | 2013-08-05 | 2016-06-22 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of coal mine underground airbridge construction method |
| CN104234734A (en) * | 2014-07-23 | 2014-12-24 | 山东科技大学 | Novel air crossing construction method of deep mine and highland pressure impact coal seam |
| CN110985038A (en) * | 2019-12-17 | 2020-04-10 | 山西宏厦第一建设有限责任公司 | Construction method of underground reinforced concrete air bridge of coal mine |
-
2020
- 2020-09-29 CN CN202011049115.1A patent/CN112160785B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112160785A (en) | 2021-01-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101280684A (en) | Goaf surrounding rock around gob-side supporting method under three soft geological condition | |
| CN110821503A (en) | Construction method for main body of ultra-deep shield section air shaft after tunnel advance | |
| CN113914860B (en) | Roof-cutting gob-side entry retaining method for non-compact solid filling working face | |
| CN110469341A (en) | A kind of assembly of Underground Subway Station combines integrated morphology and construction method with pouring | |
| CN210948688U (en) | Artificial false lane | |
| CN112160785B (en) | Rapid reinforcement pouring method for coal mine underground overpass | |
| CN101446200B (en) | Advancing coal-mining method | |
| CN106759486A (en) | A kind of underground structure being made up of stake and wall and its construction method | |
| CN110118085A (en) | A kind of compound advanced secondary tunneling method in two lane of top working face of large mining depth high working face | |
| CN109209484B (en) | Auxiliary working face withdrawing method for withdrawing channel combined with paste prefabricated block | |
| CN209443459U (en) | Cut-pff wall assembled leads wall | |
| CN207228156U (en) | A kind of underground structure being made of stake and wall | |
| CN215108944U (en) | Arch subway station is opened up and is built structure of plugging into | |
| CN108979711A (en) | The tailing-filled dehydration enclosing wall of one kind and its construction method | |
| CN114673527A (en) | Method for reinforcing broken surrounding rock of progressive roadway and tunnel | |
| CN205742215U (en) | A kind of reusable pipe gallery pattern foundation pit supporting structure and structure external mold combinative structure | |
| CN113565533A (en) | Arch subway station building connection structure and construction method | |
| CN209958372U (en) | Railway newly-added second-line platform back way foundation pile pipe curtain supporting structure | |
| CN111794791A (en) | Soft rock broken roadway boneless perfusion support method | |
| CN110541729A (en) | artificial false bottom and manufacturing method thereof | |
| CN109138484A (en) | A kind of jacking increasing layer steel core concrete column and basic connection construction method | |
| KR20210051326A (en) | Batch down wall demolition method | |
| CN109137884A (en) | Cut-pff wall assembled leads wall and its construction method | |
| CN217556961U (en) | Expanding shell type prestressed anchor rod and spray anchor combined supporting structure for vertical shaft deep foundation pit | |
| CN112324437B (en) | Method for improving recovery rate of point-column type upward horizontal stratified filling mining method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Yanbin Inventor after: Qin Jiangyan Inventor after: Zhang Dian Inventor after: Han Zhankun Inventor after: Chen Wenqi Inventor after: Peng Rencheng Inventor after: Wang Xiaoli Inventor after: Wang Mingrui Inventor before: Qin Jiangyan Inventor before: Zhang Dian Inventor before: Han Zhankun Inventor before: Chen Wenqi Inventor before: Peng Rencheng Inventor before: Wang Xiaoli Inventor before: Wang Yanbin Inventor before: Wang Mingrui |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230428 Address after: 017209 Bulian office, Wulanmulun Town, Yijinhuoluo banner, Ordos City, Inner Mongolia Autonomous Region Patentee after: GUODIAN CONSTRUCTION INVESTMENT INNER MONGOLIA ENERGY Co.,Ltd. Address before: 017209 Production Technology Department of chahasu coal mine, Guodian construction investment Inner Mongolia Energy Co., Ltd., Bulian Township, Wulanmulun Town, ejinholo banner, Ordos City, Inner Mongolia Autonomous Region Patentee before: Wang Yanbin |