CN106285683A - Mine reclamation stores water pumping method bottom openpit or Subsidence Area - Google Patents
Mine reclamation stores water pumping method bottom openpit or Subsidence Area Download PDFInfo
- Publication number
- CN106285683A CN106285683A CN201610681294.8A CN201610681294A CN106285683A CN 106285683 A CN106285683 A CN 106285683A CN 201610681294 A CN201610681294 A CN 201610681294A CN 106285683 A CN106285683 A CN 106285683A
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- Prior art keywords
- hole
- water
- openpit
- ettle
- adopting
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000005086 pumping Methods 0.000 title claims abstract description 6
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 238000005065 mining Methods 0.000 claims description 21
- 239000010410 layer Substances 0.000 claims description 15
- 229910001018 Cast iron Inorganic materials 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 238000001556 precipitation Methods 0.000 claims description 8
- 239000004927 clay Substances 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 239000010878 waste rock Substances 0.000 claims description 4
- 230000003064 anti-oxidating effect Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 abstract description 10
- 239000002352 surface water Substances 0.000 abstract description 4
- 238000001704 evaporation Methods 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract description 2
- 235000020681 well water Nutrition 0.000 abstract 1
- 239000002349 well water Substances 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- 238000003973 irrigation Methods 0.000 description 7
- 230000002262 irrigation Effects 0.000 description 7
- 239000011435 rock Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 1
- 206010016807 Fluid retention Diseases 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000003621 irrigation water Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/32—Reclamation of surface-mined areas
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Remote Sensing (AREA)
- Water Supply & Treatment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A kind of mine reclamation stores water pumping method bottom openpit or Subsidence Area, it is characterized in that utilization is adopted bottom hole without crack channel-shaped form, backfill ettle clearance configurations class underground reservoir；And by reserved some openpit not fillings, hole is stored up temporarily as collect surface water, landform is utilized to collect in temporary storage hole than fall or intercepting drain by the rainwash water adopting periphery gathering ground, hole, through natural subsidence and filtration, laterally it is collected to adopt bottom hole by ettle gap (filter course), periphery subsoil water in openpit middle and lower part laterally collects and adopts bottom hole simultaneously, forms the water storage storehouse, underground after adopting hole filling, and reserves pipe well water lift during by filling.The bright storage of water in mine reclamation is become dark storage by this technological merit, and reservoir evaporation loss has been reduced or avoided, and it also avoid occupation of land and the potential safety hazard building the pool, earth's surface water storage side, reaches the effect of Bao Xushuiyuan, Economization on land.
Description
Technical field
The invention belongs to water source deposit method in a kind of novel openpit or mining depression land reclamation, especially for
Arid, semiarid region evaporation capacity are big, and natural rainfall can not meet farming crop water consumption after mine reclamation.
Background technology
Mine reclamation refers in mine construction and production process, and in a planned way regulation is because of destructions such as destroying, subside, cover
Soil so that it is return to the work of availability status.During mining, destroy local ecological balance, be mine
The main contributor that environmental problem produces, mine reclamation is to solve mine environment and the main path of mining economy development present stage.
At present land reclamation in mining area can be divided into agricultural to reclaim according to its purposes, Forestry reclamation, fishery is reclaimed, conservation of nature is reclaimed, water provides
Reclaim in source and industry is reclaimed.Wherein agricultural is reclaimed and Forestry reclamation is most common.Limited due to cultivated area in China, mesh
Before the core reclaimed be to recover to plough.
Reclamation Technique generally comprises biological reclamation and Engineering Reclamation two broad aspect.Its core content of biological reclamation technology is main
It is contained in Forestry reclamation, i.e. includes the destroyed biocompatible evaluation in soil, Reclaimed Soil improving technology, artificial forest battalion
Make, promote the volume increase skills of reclaiming such as growing technology, plant species selection technique and fertilising, Parcel of seed, mycorhiza, water absorbing agent volume increase
Art.Engineering Reclamation Technology refers in Engineering Reclamation, according to location natural environmental condition and the requirement of reclaimed land utilization orientation,
To discarded using waste filling, flyash filling, digging that the means such as deep pad is shallow backfill, heap is built and smooth and take necessity
The measures such as flood control, water drainage and environmental improvement.
At present, mine reclamation engineering many carry out exploring from filling technique, Soil Reconstruction technology, Technology of reclaiming and
Innovation, and define Patents technical products.And for mine reclamation water source technique, the traditional utilization of many employings is adopted hole and is built
The pool, side savings water, draw periphery surface water, beat motor-pumped well and take the modes such as subsoil water as arable land iirigation water source after mine reclamation, also pin
Orographic condition specific to mine and water source, the mine Technology patent of water resources condition research and development.Mine openpit is the most relatively
Deeply, reach 100 meters of deep adopting to cheat more typically, it is generally required to pumping drainage can ensure mining in recovery process.Once close
Hole, in adopting hole, majority has subsoil water and surface water accumulation.Set up a set of novel hole of adopting and store water lift technology, on the one hand can solve multiple
Cultivate arable land iirigation water source problem, on the other hand also contribute to soil saving utilization and ecological environmental protection.
There is no guarantee that water source in arid, Semi-arid Mountain Area mine reclamation, side's pool water storage easily evaporates, it is impossible to ensure to reclaim use
Water.
Summary of the invention
It is an object of the invention to for arid, water source there is no guarantee that in the mine reclamation of Semi-arid Mountain Area, side's pool water storage easily steams
The present situation such as send out, it is provided that bottom a kind of openpit or mining depression ground, store water pumping method, efficient and rational utilization row's rock waste fill
Underground surely heavy after numerous spaces between rubble, construct class water-bearing layer；And by the most unfilled adopt hole temporarily storage ground precipitation and
Subsoil water recharge laterally, makes to become bottom openpit or mining depression ground underground savings reservoir, ploughs as after mine reclamation
Iirigation water source.
The present invention seeks to be achieved through the following technical solutions:
(1) utilize bottom openpit without crack channel-shaped form, select at the bottom of the ettle filling openpit of particle diameter 20 ~ 50cm
Portion, the hole of adopting closing hole is fills up to and the height of adjacent earth's surface 40-60cm apart by the ettle of backfill, and this height is for reserving
Structure surface layer thickness；By ettle clearance configurations class underground reservoir;
(2) certain limit not filling is set with adopting hole or mining depression in the open and stores up hole temporarily as rainwash water, utilize ground
The rainwash water of openpit or periphery gathering ground, mining depression ground is come together in and stores up hole temporarily by shape ratio fall or intercepting drain, and passes through
Natural subsidence and filtration, laterally penetrate into the ettle clearance configurations class underground bottom openpit or mining depression ground aqueous
Layer；Adopt the recharge laterally of hole or mining depression ground periphery subsoil water to adopting bottom hole or mining depression ground and between ettle simultaneously
Gap, ultimately form mine reclamation openpit or mining depression ground bottom save water source；
(3) while filling rejected ore, pre-buried multistage cast iron well casing, to cheating at the end bottom pipe, cast iron well casing external diameter 440mm is
Preferably, and be coated with antioxidation coating；Multistage cast iron well casing is followed successively by precipitation tube, filter pipe and wall casing by cheating bottom to earth's surface；Precipitation tube
A length of 5 ~ 10m, filter tube a length of underground reservoir thickness, the tube wall of filter tube is laid treatment hole, in cast iron well casing
Arranging water inlet pipe, water inlet pipe lower end connects immersible pump；By immersible pump, water being evacuated to earth's surface, after being used for reclaiming, agricultural land fills
Irrigate；
(4) adopting after hole utilizes waste rock to fill, lay clay fixed layer on upper strata, thickness is 10-20cm, and compacting is fixing, and
Laying iron tailings layer of sand, thickness is 5-10cm, topmost covers suitable agric, and thickness is 25-30cm.
Irrigating facility uses drip irrigation or sprinkling irrigation.
The positive effect of the present invention: efficient and rational utilization row's rock waste fill, because of the soil that destroys of mining, reduces that it is original
Landforms, utilize numerous spaces between steady heavy row's rock rubble, construct class water-bearing layer；And adopt the temporary deposit and remittance collection in hole by the most unfilled
Ground precipitation and subsoil water recharge laterally, make to become bottom openpit or mining depression ground underground savings reservoir, as mine
The iirigation water source ploughed after reclaiming.
Accompanying drawing explanation
Fig. 1 is the openpit schematic cross-section that earth's surface is smooth.
Fig. 2 is the openpit schematic cross-section in hillside fields.
Fig. 3 is the schematic diagram that the present invention adopts the interior pre-buried cast iron well casing in hole in the open.
Fig. 4 is to adopt hole interior backfill ettle in the open and every staying storage hole schematic diagram temporarily.
Fig. 5 is to lay clay fixed layer, laying iron tailings sand and soil moved in improve the original schematic diagram on upper strata.
Fig. 6 is cast iron well casing structural representation.
Fig. 7 is to adopt backfill structure enlarged diagram in hole in the open.
Detailed description of the invention
Embodiment one
1, the smooth openpit (see figure 1) of an arid or earth's surface, semiarid zone is chosen；Utilize bottom openpit without splitting
Slot shape form, backfills ettle (see figure 5), and the hole of adopting closing hole is fills up to adjacent earth's surface apart by the ettle of backfill
The height of 40-60cm, this height is for reserving structure surface layer thickness；Select the ettle filling dew of 20 ~ 50cm particle size range
It adopts bottom hole, by ettle clearance configurations class underground reservoir.
2, see Fig. 3,4 before waste fill, choose " well location ", while filling rejected ore, pre-buried multistage cast iron
Well casing, to cheating at the end bottom pipe, cast iron well casing external diameter 440mm is advisable, and thickness of pipe wall is on the basis of bearing ettle lateral pressure, and is coated with
Antioxidation coating 2；Multistage cast iron well casing is followed successively by precipitation tube 6, filter pipe 4 and wall casing 1 by cheating bottom to earth's surface；Precipitation tube 6 is long
Degree is 5 ~ 10m, filter pipe 4 a length of underground reservoir thickness, the tube wall of filter pipe 4 is laid treatment hole, in cast iron well casing
Arranging water inlet pipe 3, water inlet pipe 3 lower end connects immersible pump 5；After reclaiming, agricultural land is irrigated.Laying pipe well quantity can basis
Long-term cropping water consumption and the underground savings water yield determine.
3, seeing Fig. 5, form filter course at the suitable position rubble adopting hole, particle diameter is row's rock barren rock of 5-15cm, every staying
Going out certain limit not filling and store up hole temporarily as rainwash water, storage pit-size determines according to charge for remittance amount temporarily, utilizes landform than fall
Or the rainwash water adopting periphery gathering ground, hole is come together in and stores up hole temporarily by intercepting drain, and through natural subsidence and filtration, by broken
Stone filter course laterally penetrates into the ettle clearance configurations class underground reservoir bottom openpit；Adopt hole periphery subsoil water simultaneously
Recharge laterally to adopting bottom hole to ettle gap, ultimately form savings water source bottom the openpit of mine reclamation.
4, see Fig. 6,7, adopt hole utilize waste rock fill after, upper strata lay clay fixed layer 9, thickness is 10-20cm,
Compacting is fixing, and lays iron tailings layer of sand 8, and thickness is 5-10cm, is topmost soil moved in improve the original layer 7, and thickness is 25-30cm, uses excellent
Matter is ploughed native.Irrigating facility uses drip irrigation or sprinkling irrigation.
Already ensure that before enforcement that water quality meets country's irrigation norm, and set up routine test water collecting sump water quality system, it is ensured that
Water quality can reach agricultural irrigation water quality national standard all the time, ensures grain yield, food safety.
Embodiment two
Choose the openpit (see figure 2) in an arid or hillside fields, semiarid zone.
Step one, two, three as above, step 4: adopt after hole utilizes waste rock to fill, lay clay fixed layer 9 on upper strata,
Thickness is 10-20cm, and compacting is fixing, and lays iron tailings layer of sand, and thickness is 5-10cm, is topmost soil moved in improve the original layer 7, and thickness is
25-30cm, uses high-quality to plough native.Build terraced fields to be used for preventing erosion simultaneously, play water-retention, soil conservation, production-increasing function.Fill
Irrigate facility and use drip irrigation or sprinkling irrigation.
Claims (1)
1. mine reclamation stores a water pumping method bottom openpit or Subsidence Area, it is characterized in that:
(1) utilize bottom openpit without crack channel-shaped form, select at the bottom of the ettle filling openpit of particle diameter 20 ~ 50cm
Portion, the hole of adopting closing hole is fills up to and the height of adjacent earth's surface 40-60cm apart by the ettle of backfill, and this height is for reserving
Structure surface layer thickness；By ettle clearance configurations class underground reservoir;
(2) certain limit not filling is set with adopting hole or mining depression in the open and stores up hole temporarily as rainwash water, utilize ground
The rainwash water of openpit or periphery gathering ground, mining depression ground is come together in and stores up hole temporarily by shape ratio fall or intercepting drain, and passes through
Natural subsidence and filtration, laterally penetrate into the ettle clearance configurations class underground bottom openpit or mining depression ground aqueous
Layer；Adopt the recharge laterally of hole or mining depression ground periphery subsoil water to adopting bottom hole or mining depression ground and between ettle simultaneously
Gap, ultimately form mine reclamation openpit or mining depression ground bottom save water source；
(3) while filling rejected ore, pre-buried multistage cast iron well casing, to cheating at the end bottom pipe, cast iron well casing external diameter 440mm is
Preferably, and be coated with antioxidation coating；Multistage cast iron well casing is followed successively by precipitation tube, filter pipe and wall casing by cheating bottom to earth's surface；Precipitation tube
A length of 5 ~ 10m, filter tube a length of underground reservoir thickness, the tube wall of filter tube is laid treatment hole, in cast iron well casing
Arranging water inlet pipe, water inlet pipe lower end connects immersible pump；By immersible pump, water being evacuated to earth's surface, after being used for reclaiming, agricultural land fills
Irrigate；
(4) adopting after hole utilizes waste rock to fill, lay clay fixed layer on upper strata, thickness is 10-20cm, and compacting is fixing, and
Laying iron tailings layer of sand, thickness is 5-10cm, topmost covers suitable agric, and thickness is 25-30cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610681294.8A CN106285683B (en) | 2016-08-18 | 2016-08-18 | Openpit or Subsidence Area bottom store water pumping method in mine reclamation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610681294.8A CN106285683B (en) | 2016-08-18 | 2016-08-18 | Openpit or Subsidence Area bottom store water pumping method in mine reclamation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106285683A true CN106285683A (en) | 2017-01-04 |
| CN106285683B CN106285683B (en) | 2018-12-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610681294.8A Active CN106285683B (en) | 2016-08-18 | 2016-08-18 | Openpit or Subsidence Area bottom store water pumping method in mine reclamation |
Country Status (1)
| Country | Link |
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| CN (1) | CN106285683B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701229A (en) * | 2017-09-29 | 2018-02-16 | 华北理工大学 | Surface mining landfill is administered and underground head stage casings goaf filling draining Synergistic method |
| CN110029631A (en) * | 2018-12-07 | 2019-07-19 | 包头钢铁（集团）有限责任公司 | A kind of high-quality operation operating method in extremely frigid zones high-concentration tailings library |
| CN111088788A (en) * | 2019-12-16 | 2020-05-01 | 中国矿业大学 | Method for communicating aquifers of soil dumping site in strip mine |
| CN113107061A (en) * | 2021-04-15 | 2021-07-13 | 中国矿业大学 | Stratum reconstruction method for near-urban abandoned strip mine |
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| US4611951A (en) * | 1985-10-07 | 1986-09-16 | American Cyanamid Company | Process for reclamation of excavated mine sites |
| CN101176400A (en) * | 2006-11-08 | 2008-05-14 | 中国矿业大学(北京) | New process for recultivating glebe in mine subsidence area |
| CN101451355A (en) * | 2008-12-03 | 2009-06-10 | 中国矿业大学 | Water retention method of back fill course |
| CN102511214A (en) * | 2011-11-11 | 2012-06-27 | 甄文杰 | Method for recultivating collapsed soil in coal mining |
| CN102972112A (en) * | 2012-11-28 | 2013-03-20 | 常州大学 | Method for reclaiming collapsed land of mines |
| CN104255109A (en) * | 2014-10-24 | 2015-01-07 | 刘勇 | Method for conducting ecological restoration in mine geological disaster region |
| CN104641755A (en) * | 2014-12-09 | 2015-05-27 | 涞水丰源环保科技有限公司 | Land restoration method for abandoned sand mining field |
| CN104831678A (en) * | 2015-01-30 | 2015-08-12 | 王健 | Ecological restoration method for tailing depot reclamation after tailing depot closure |
-
2016
- 2016-08-18 CN CN201610681294.8A patent/CN106285683B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4611951A (en) * | 1985-10-07 | 1986-09-16 | American Cyanamid Company | Process for reclamation of excavated mine sites |
| CN101176400A (en) * | 2006-11-08 | 2008-05-14 | 中国矿业大学(北京) | New process for recultivating glebe in mine subsidence area |
| CN101451355A (en) * | 2008-12-03 | 2009-06-10 | 中国矿业大学 | Water retention method of back fill course |
| CN102511214A (en) * | 2011-11-11 | 2012-06-27 | 甄文杰 | Method for recultivating collapsed soil in coal mining |
| CN102972112A (en) * | 2012-11-28 | 2013-03-20 | 常州大学 | Method for reclaiming collapsed land of mines |
| CN104255109A (en) * | 2014-10-24 | 2015-01-07 | 刘勇 | Method for conducting ecological restoration in mine geological disaster region |
| CN104641755A (en) * | 2014-12-09 | 2015-05-27 | 涞水丰源环保科技有限公司 | Land restoration method for abandoned sand mining field |
| CN104831678A (en) * | 2015-01-30 | 2015-08-12 | 王健 | Ecological restoration method for tailing depot reclamation after tailing depot closure |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701229A (en) * | 2017-09-29 | 2018-02-16 | 华北理工大学 | Surface mining landfill is administered and underground head stage casings goaf filling draining Synergistic method |
| CN110029631A (en) * | 2018-12-07 | 2019-07-19 | 包头钢铁（集团）有限责任公司 | A kind of high-quality operation operating method in extremely frigid zones high-concentration tailings library |
| CN111088788A (en) * | 2019-12-16 | 2020-05-01 | 中国矿业大学 | Method for communicating aquifers of soil dumping site in strip mine |
| CN111088788B (en) * | 2019-12-16 | 2020-11-13 | 中国矿业大学 | Method for communicating aquifers of soil dumping site in strip mine |
| CN113107061A (en) * | 2021-04-15 | 2021-07-13 | 中国矿业大学 | Stratum reconstruction method for near-urban abandoned strip mine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106285683B (en) | 2018-12-04 |
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Effective date of registration: 20231102 Address after: 122400 Xincheng Village, Xiaotang Town, Jianping County, Chaoyang City, Liaoning Province Patentee after: JIANPING SHENGDE RIXIN MINING INDUSTRY Co.,Ltd. Address before: 110866 120 Dongling Road, Shenhe District, Shenyang, Liaoning Patentee before: SHENYANG AGRICULTURAL University Patentee before: JIANPING SHENGDE RIXIN MINING INDUSTRY Co.,Ltd. |
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