CN101749016A - Ecological sealing slurry flame retardation and vegetation recovery technology for coal gangue hill - Google Patents
Ecological sealing slurry flame retardation and vegetation recovery technology for coal gangue hill Download PDFInfo
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- CN101749016A CN101749016A CN201010000473A CN201010000473A CN101749016A CN 101749016 A CN101749016 A CN 101749016A CN 201010000473 A CN201010000473 A CN 201010000473A CN 201010000473 A CN201010000473 A CN 201010000473A CN 101749016 A CN101749016 A CN 101749016A
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Abstract
The invention discloses an ecological sealing slurry flame retardation and vegetation recovery technology for a coal gangue hill. The technology comprises the following steps: firstly, tidying up the landform of a coal gangue hill, and arranging a slope stability protection and slope surface water drainage system; secondly, perforating the prior fire source points and pouring alkaline slurry for fire extinguishment; thirdly, sprinkling alkaline blended sealing slurry on the surface layer of the coal gangue hill; fourthly, spraying ecological vegetation recovery slurry on the blended sealing slurry; fifthly, spraying and sowing seeds of shrub and herbaceous plants; sixthly, laying protective materials. By spraying ecological vegetation recovery slurry, the soil condition is provided for the plants to grow, simultaneously, the construction soil consumption and the construction cost are reduced through the slurry spraying technology, and the problem of difficult construction transportation can be overcome. The use of shrub and herbaceous plants can avoid the main root of the root system of arbor from extending into the inner layer, guiding the infiltration of water stream, and inducing oxidation and temperature rise of gangue; in addition, when coal gangue is applied again as an energy source substance, the standing forest of arbor can not be damaged. Because the formed soil layer is suitable for shrub and herbaceous plants to grow, therefore, the ecological principle can be met; vegetational type at late stages can be stably sustained, and good ecological effect can be generated.
Description
Technical field
The present invention relates to a kind of technology for recovering vegetation, more particularly relate to a kind of coal gangue hill ecological sealing slurry flame retardation and technology for recovering vegetation.
Background technology
Because social development has driven a large amount of exploitations in colliery to the active demand of the energy, can produce a certain proportion of gangue in the recovery process in colliery, the discharging of gangue and management are the stubborn problems that coal mining enterprise faces always.The stacking meeting land occupation resource of a large amount of gangues, influence view, the substance source of formation soil erosion and airborne dust, for the high gangue of some sulfur content, dieseling, contaminated air also can take place in bulk deposition; And the obvious slant acidity of the gangue that sulfur content is high directly can produce acidifying pollution etc. to soil and water body; Gangue self that simultaneously can spontaneous combustion has higher calorie value, is a kind of colm, is a kind of utilizable energy source material, is currently also not make full use of, and is badly in need of implementing as stocking energy-source plant protection, preserving.In the face of these problems and the characteristics of gangue, press for effective technical means and implement the protection of the gangue energy and the recovery improvement of ecological environment of coal gangue hill.
Summary of the invention
One of purpose of the present invention is by to the regulation and control of the spontaneous combustion of coal gangue hill factor, and gangue is sealed up for safekeeping with the form of coal gangue hill as low-grade mineral resource, preserves, protects this and stock energy and material.
Second purpose of the present invention is to overcome in the coal gangue hill ecological recovery engineering because of the restricted factor of vegetation growth in the land occupation condition, build suitable edaphic condition of irritating the growth of careless vegetational type, and, follow the course of nature, by artificial promotion natural vegetation restoration in conjunction with the careless plant seed of filling of sowing grass seeds by duster.
The 3rd purpose of the present invention is the traditional method that in the past carried out afforestation at coal gangue hill surface earthing 1-2m by the enforcement change of this technology, reduce because soil moved in to improve the original is native to other region list and the destruction of ecological environment, and can effectively implement environmental vegetation recovery, reduce the vegetation recovery cost.
These and other objects of the present invention will further embody and illustrate by following detailed.
Fire-retardant and the ecological vegetation recovery technology of coal gangue hill of the present invention comprises the steps:
1), carry out coal gangue hill landform arrangement, stable protection of sloping body and slope drainage system are set;
2), to the fire extinguishing of existing burning things which may cause a fire disaster point punching perfusion alkalescence slurry;
3), the sealing of coal gangue hill top layer sprinkling irrigation alkalescence is in harmonious proportion and starches;
4), sealing is in harmonious proportion and sprays the ecological slurry of attached vegetation recovery above the slurry;
5), sow grass seeds by duster and irritate careless vegetable seeds;
6), lay protective materials.
In the fire-retardant and ecological vegetation recovery technology of coal gangue hill of the present invention, described coal gangue hill landform arrangement, stable protection of sloping body and slope drainage system step are set to be comprised: coal gangue hill is carried out the landform arrangement, be provided with that classification packway, toe are blocked, appropriateness is smooth domatic, guarantee that sloping body is stable; And according to the domatic runoff situation of confluxing, lay intercept water, charge for remittance, escape canal, to may tackle the domatic runoff that washes away influence, classification in order row lead.
Described existing burning things which may cause a fire disaster point punching perfusion alkalescence slurry fire extinguishing step is comprised: by to existing burning things which may cause a fire disaster point position according to the ignition point degree of depth and area laying fill orifice, perfusion is joined the alkalescence fire extinguishing slurry that pulp material, macromolecule organic matter gangue depressor of autoignition are main allotment material with swell soil, quicklime alkalescence, the prevention air contacts with gangue, reaching the purpose of going out except that the existing burning things which may cause a fire disaster of hillock.Described alkalescence fire extinguishing slurry comprises:
Swell soil 40～50 weight portions
Lime 8～10 weight portions
APP (APP) 0.1～0.12 weight portion.
The alkaline sealing mediation of described coal gangue hill top layer sprinkling irrigation slurry step comprises: after coal gangue hill fire extinguishing engineering completed 1 day, utilize engineering to spray the machinery sprinkling irrigation to join pulp material, macromolecule organic gangue depressor of autoignition with swell soil, lime alkalescence serve as that the alkalescence sealing of main allotment material is in harmonious proportion and starches on its surface, form the confining bed of 5-10cm on the top layer, stop air, water to contact relatively, play the effect that suppresses spontaneous combustion with gangue.The preparation sealing is in harmonious proportion and starches in proportion, and the modulation part by weight of allotment material and water is 5: 3.The prescription of described alkalescence sealing slurry main material is:
Swell soil 10～15 weight portions
Plantation loam 30～45 weight portions
Flyash 5～8 weight portions
APP (APP) 0.1～0.12 weight portion.
The ecological step of starching of the attached vegetation recovery of spray comprises above the described sealing mediation slurry: be in harmonious proportion slurry construction end after 2-5 days in the alkalescence sealing, utilize engineering to spray the attached ecological slurry of being made up of materials such as peat, binding agent, water-loss reducer, swell soil, fertilizers of vegetation recovery of machinery spray on its top layer, jet thickness is 5-8cm.The prescription of described ecology recovering slurry main material is:
Peat 60～65 weight portion water-loss reducers 1～2 weight portion
Adhesive 1～1.5 weight portion expanded vermiculite 6～8 weight portions
Swell soil 18～20 weight portion fertilizers 6～8 weight portions
Long-acting slow-release fertilizer 1～2 weight portion zeolite 4～5 weight portions
Planting soil 180～200 weight portions
The ecological slurry of vegetation recovery dry is 4:3 with the mixed weight ratio of water for ratio when spraying operation.
The described careless vegetable seeds step of filling of sowing grass seeds by duster comprises: utilize engineering to spray machinery on the ecological slurry of vegetation recovery top layer and spray the careless vegetable seeds of attached filling, for irritate careless vegetable seeds can be effectively attached to the top layer of ecology slurry and germinating growth smoothly, to irritate the external surface that is ejected into the vegetation recovery slurry after careless vegetable seeds, wood fiber, water-loss reducer utilize aqua fully to mix when spraying operation, jet thickness is 1-2cm.The prescription of main material is:
Wood fiber 10～12 weight portions
Adhesive 1～1.2 weight portion
Plant species 2～3 weight portions
Dry is 1: 4 with the mixed weight ratio of water for ratio when spraying operation.
Described laying protective materials step comprises: wait to irritate grass seed jetted layers typing back at domatic laying tapetum fibrosum or nonwoven, lay from top to bottom, overlap 5-10cm between the adjacent covering, fully contact and fixing with domatic with the zinc-plated U-irons nail of 3 millimeters of Φ, iron nail spacing 1-1.5m, quincunx being laid staggeredly sprayed water after the construction immediately, keeps domatic moistening until germination.
The basic recipe science of fluid injection fire-fighting, reasonable contains a large amount of fillers in the slurry, make it can cover the combustion zone effectively, and can block air communication channel effectively.Raw material are selected existing covering effect, and the effect of the resume combustion of preventing is arranged again.With swell soil preparation magma, swell soil has the good characteristics of pulping, and its inner three-dimensional grid structure that forms solid can carry extinguishment additive agent effectively, thereby make slurry can arrive and cover the gangue zone of burning effectively, and do not form the part alluvial of slurry; Swell soil easily with gangue in clay mineral and generation under the high temperature of combustion zone such as the basic matterial that is added is a series of is similar to silicated chemical reaction, its result forms the covering layer of one deck densification in hillock gangue combustion zone, thereby stoped contacting of air and gangue, thereby helped thoroughly extinguishing the spontaneous combustion of hillock gangue.The effect that alkalescence is joined pulp material is that they can series of chemical take place with hillock gangue combustion zone, its result has not only formed water-fast CaSO3 CaSO4 and H2O, the passage that these products help further filling the combustion zone make administer more thorough.This neutralization reaction helps improving the acid pollution that pollutant that spontaneous combus tion of waste heap discharges and leaching cause environment, and the H2O that is generated helps reducing the hillock temperature again.CaO adds in the gangue, and the fugitive constituent of gangue is separated out temperature, activation energy obviously increases.Then the spontaneous combustion trend of hillock gangue then obviously reduces, so CaO can play the effect that suppresses the spontaneous combustion of hillock gangue.The gangue depressor of autoignition that is added, its cardinal principle is to use the organic macromolecule material, because the organic polymer material is the very strong group of an adsorptivity, the high polymer that has adsorption group forms multiple spot absorption and stops oxygen to contact with gangue, and surfactant is because it has hydrophilic and two kinds of groups of oleophylic, so its lipophilic group contacts with gangue.Hydrophilic radical then stretches to air, makes gangue obtain hydrophily, its emulsion forms water membrane on the gangue surface, has stoped contacting of air and gangue, plays the effect of resistanceization.And non-polar group interacts with the fugitive constituent organic matter again, thereby improved the temperature of separating out of hillock gangue fugitive constituent greatly, play the effect that suppresses spontaneous combustion, not only the fire extinguishing in early stage is had positive meaning, and it prevents that to the later stage spontaneous combustion recurrence of hillock gangue from having great importance.
The sealing of top layer sprinkling irrigation alkalescence is in harmonious proportion and starches is to reach the passage that stops up empty G﹠W, contacts with gangue stoping air, water, plays the effect that suppresses spontaneous combustion.Simultaneously owing to utilize the alkaline flyash of coal burning, realize that neutralization to gangue acidity is beneficial to the neutral soil environment of building plant growing and can also realizes comprehensive utilization of waste materials.
Utilize the ecological slurry of the attached vegetation recovery of spray for the growth of plant provides edaphic condition, overcome another restricted factor of coal gangue hill vegetation recovery.Utilize the whitewashing technology to reduce construction soil amount, cost simultaneously, and can overcome the difficult problem of some construction transportations.Because what use is to irritate careless vegetation, avoid arbor root system arbor main root to go deep into the infiltration of internal layer guiding current, bring out the spoil oxidation and heat; And when using gangue again and use, can not produce damage to the arbor standing forest as energy substance.Irritate careless vegetation growth because the soil horizon that forms is suitable, meet ecological principle, the later stage, vegetational type can stablize lastingly, produced good ecological effect.
The all raw material of Shi Yonging etc. all is conventional uses in the present invention, can buy from market.Can adopt trade mark as water-loss reducer is non-irrigated dotey's product, it is to like gloomy product that adhesive can adopt trade mark, it is the product of Tsing-Hua University that biological organic fertilizer can adopt trade mark, it is to like the dense product of moral that long-acting slow-release fertilizer can adopt trade mark, and above product can be bought from the easy ecological Studies of Beijing gold dollar center; Peat can adopt the fertilizer peat of rich field, Heilungkiang fertilizer Co., Ltd production and sales, it is 2～4 sales company of Lingshou County good letter vermiculite processing factory (Tianjin) that expanded vermiculite can adopt specification, swell soil can adopt the organobentonite of Jing Taihua swell soil development in science and technology Co., Ltd production and sales, zeolite can adopt the 4A synthetic zeolite of Yuci, Shanxi long day Li Gaoke Co., Ltd production and sales, and wood fiber is bought by the ecological Science and Technology Ltd. of Beijing San Feng the earth.
In the present invention, refer in particular to as non-, all amount, percentages are unit of weight, based on gross weight.
Below in conjunction with embodiment the present invention is carried out concrete description.As known by the technical knowledge, the present invention can realize by other the embodiment that does not break away from its spiritual essence or essential feature.All within the scope of the present invention or the change that is equal in the scope of the present invention all be included in the invention.
Embodiment 1
Carry out according to following steps:
1, carries out the arrangement of coal gangue hill landform, stable protection of sloping body and slope drainage system are set;
Coal gangue hill is carried out landform arrangement, be provided with that classification packway, toe are blocked, appropriateness is smooth domatic, guarantee that sloping body is stable; And according to the domatic runoff situation of confluxing, lay intercept water, charge for remittance, escape canal, to may tackle the domatic runoff that washes away influence, classification in order row lead.
2, to the fire extinguishing of existing burning things which may cause a fire disaster point punching perfusion alkalescence slurry;
By fill orifice being laid according to the ignition point degree of depth and area in existing burning things which may cause a fire disaster point position, perfusion alkalescence fire extinguishing slurry.The prescription of described alkalescence fire extinguishing slurry is:
50 kilograms of swell soils, 10 kilograms in lime, 0.12 kilogram of macromolecule organic.
3, the sealing of coal gangue hill top layer sprinkling irrigation alkalescence is in harmonious proportion and starches;
After 1 day, utilize engineering injection machinery sprinkling irrigation alkalescence sealing mediation slurry in the completion of coal gangue hill fire extinguishing engineering on its surface, the allotment slurry is 5: 3 with the modulation part by weight of water, at the confining bed of top layer formation 5-10cm.Described alkalescence sealing slurry comprises:
15 kilograms of swell soils, 45 kilograms in plantation loam, 8 kilograms in flyash
0.12 kilogram of macromolecule organic.
4, sealing is in harmonious proportion and sprays the ecological slurry of attached vegetation recovery above the slurry;
Be in harmonious proportion slurry construction end after 2-5 days in the alkalescence sealing, utilize engineering to spray the ecological slurry of mechanical injection vegetation recovery on its top layer, the ecological slurry of vegetation recovery dry is 4: 3 with the mixed weight ratio of water when spraying operation, and jet thickness is 5-8cm, and described ecology recovering slurry comprises:
2 kilograms of 65 kilograms of water-loss reducers of peat
8 kilograms of 1.5 kilograms of expanded vermiculites of adhesive
8 kilograms of 20 kilograms of fertilizers of swell soil
5 kilograms in the fertile 2 kilograms of zeolites of long-acting slow-release
200 kilograms of planting soils.
5, sow grass seeds by duster and irritate careless vegetable seeds;
Utilize engineering to spray the careless vegetable seeds of the machinery attached filling of spray on the ecological slurry of vegetation recovery top layer, when spraying operation, will irritate the external surface that is ejected into the vegetation recovery slurry after careless vegetable seeds, wood fiber, water-loss reducer utilize aqua fully to mix, dry is 1: 4 with the mixed weight ratio of water for ratio when spraying operation, jet thickness is 1-2cm, fills a prescription to be:
12 kilograms of wood fibers, 1.2 kilograms in adhesive, 3 kilograms of vegetable seeds.
6, lay protective materials;
Wait to irritate grass seed jetted layers typing back at domatic laying tapetum fibrosum or nonwoven, lay from top to bottom, overlap 5-10cm between the adjacent covering, fully contact and fixing with domatic with the zinc-plated U-irons nail of 3 millimeters of Φ, iron nail spacing 1-1.5m, quincunx being laid staggeredly sprayed water after the construction immediately, keeps domatic moistening until germination.
Claims (9)
1. coal gangue hill ecological sealing slurry flame retardation and technology for recovering vegetation is characterized in that comprising the steps:
1), carry out coal gangue hill landform arrangement, stable protection of sloping body and slope drainage system are set;
2), to the fire extinguishing of existing burning things which may cause a fire disaster point punching perfusion alkalescence slurry;
3), the sealing of coal gangue hill top layer sprinkling irrigation alkalescence is in harmonious proportion and starches;
4), sealing is in harmonious proportion and sprays the ecological slurry of attached vegetation recovery above the slurry;
5), sow grass seeds by duster and irritate careless vegetable seeds;
6), lay protective materials.
2. coal gangue hill ecological sealing slurry flame retardation according to claim 1 and technology for recovering vegetation, it is characterized in that described coal gangue hill landform arrangement, stable protection of sloping body and slope drainage system step are set to be comprised: coal gangue hill is carried out the landform arrangement, be provided with that classification packway, toe are blocked, appropriateness is smooth domatic, guarantee that sloping body is stable; And according to the domatic runoff situation of confluxing, lay intercept water, charge for remittance, escape canal, to may tackle the domatic runoff that washes away influence, classification in order row lead.
3. coal gangue hill ecological sealing slurry flame retardation according to claim 1 and technology for recovering vegetation, it is characterized in that described existing burning things which may cause a fire disaster point punching perfusion alkalescence slurry fire extinguishing step being comprised: by fill orifice is laid according to the ignition point degree of depth and area in existing burning things which may cause a fire disaster point position, perfusion alkalescence is put out a fire and is starched.
4. coal gangue hill ecological sealing slurry flame retardation according to claim 3 and technology for recovering vegetation is characterized in that described alkalescence fire extinguishing slurry comprises:
Swell soil 40～50 weight portions
Lime 8～10 weight portions
APP 0.1～0.12 weight portion.
5. coal gangue hill ecological sealing slurry flame retardation according to claim 1 and technology for recovering vegetation, it is characterized in that the alkaline sealing mediation of described coal gangue hill top layer sprinkling irrigation slurry step comprises: after coal gangue hill fire extinguishing engineering completed 1 day, utilize engineering injection machinery sprinkling irrigation alkalescence sealing mediation slurry on its surface, the allotment slurry is 5: 3 with the modulation part by weight of water, forms the confining bed of 5-10cm on the top layer.
6. coal gangue hill ecological sealing slurry flame retardation according to claim 5 and technology for recovering vegetation is characterized in that described alkalescence sealing slurry comprises:
Swell soil 10～15 weight portions
Plantation loam 30～45 weight portions
Flyash 5～8 weight portions
APP 0.1～0.12 weight portion.
7. coal gangue hill ecological sealing slurry flame retardation according to claim 1 and technology for recovering vegetation, it is characterized in that the ecological step of starching of the attached vegetation recovery of spray comprises above the described sealing mediation slurry: be in harmonious proportion slurry construction end after 2-5 days in the alkalescence sealing, utilize engineering to spray the ecological slurry of mechanical injection vegetation recovery on its top layer, the ecological slurry of vegetation recovery dry is 4: 3 with the mixed weight ratio of water when spraying operation, jet thickness is 5-8cm, and described ecology recovering slurry comprises:
Peat 60～65 weight portion water-loss reducers 1～2 weight portion
Adhesive 1～1.5 weight portion expansion leech 6～8 weight portions
Swell soil 18～20 weight portion fertilizers 6～8 weight portions
Long-acting slow-release fertilizer 1～2 weight portion zeolite 4～5 weight portions
Planting soil 180～200 weight portions.
8. coal gangue hill ecological sealing slurry flame retardation according to claim 1 and technology for recovering vegetation, it is characterized in that the described careless vegetable seeds step of filling of sowing grass seeds by duster comprises: utilize engineering to spray machinery on the ecological slurry of vegetation recovery top layer and spray the careless vegetable seeds of attached filling, when spraying operation, will irritate the external surface that is ejected into the vegetation recovery slurry after careless vegetable seeds, wood fiber, water-loss reducer utilize aqua fully to mix, dry is 1: 4 with the mixed weight ratio of water for ratio when spraying operation, jet thickness is 1-2cm, fills a prescription to be:
Wood fiber 10～12 weight portions
Adhesive 1～1.2 weight portion
Plant species 2～3 weight portions.
9. coal gangue hill ecological sealing slurry flame retardation according to claim 1 and technology for recovering vegetation, it is characterized in that described laying protective materials step comprises: wait to irritate grass seed jetted layers typing back at domatic laying tapetum fibrosum or nonwoven, lay from top to bottom, overlap 5-10cm between the adjacent covering, fully contact and fixing iron nail spacing 1-1.5m, quincunx being laid staggeredly with the zinc-plated U-irons nail of 3 millimeters of Φ with domatic, spray water immediately after the construction, keep domatic moistening until germination.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010100004733A CN101749016B (en) | 2010-01-11 | 2010-01-11 | Ecological sealing slurry flame retardation and vegetation recovery technology for coal gangue hill |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010100004733A CN101749016B (en) | 2010-01-11 | 2010-01-11 | Ecological sealing slurry flame retardation and vegetation recovery technology for coal gangue hill |
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| CN101749016A true CN101749016A (en) | 2010-06-23 |
| CN101749016B CN101749016B (en) | 2012-08-01 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787610A (en) * | 2012-08-30 | 2012-11-21 | 新汶矿业集团有限责任公司翟镇煤矿 | Method for improving and processing hillock surface body |
| CN103975738A (en) * | 2014-05-15 | 2014-08-13 | 淮南矿业(集团)有限责任公司 | Vegetation construction method based on gangue pile |
| CN109328518A (en) * | 2018-08-20 | 2019-02-15 | 江苏绿岩生态技术股份有限公司 | A kind of ecological restoring method of Gangue Hill |
| CN109763499A (en) * | 2019-01-07 | 2019-05-17 | 四川川煤华荣能源股份有限公司 | For big height difference, the comprehensive processing method of abrupt slope drop coal gangue hill |
| CN110984188A (en) * | 2019-12-06 | 2020-04-10 | 安徽师范大学 | Comprehensive treatment process for waste rock hill |
| WO2022160483A1 (en) * | 2021-01-28 | 2022-08-04 | 山西大学 | Method for restoration and treatment of coal gangue mountain using coal-based solid waste |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2910272Y (en) * | 2006-06-07 | 2007-06-13 | 张成梁 | Oxygen isolated fire fighting pouring pipe for self-ignition piled gangue |
| CN100499992C (en) * | 2007-02-02 | 2009-06-17 | 中国矿业大学(北京) | Greening method of self-ignition coal gangue hill |
| CN101519966B (en) * | 2009-04-03 | 2011-06-01 | 赵平 | Method for comprehensively treating ecological environment of coal gangue hill |
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2010
- 2010-01-11 CN CN2010100004733A patent/CN101749016B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787610A (en) * | 2012-08-30 | 2012-11-21 | 新汶矿业集团有限责任公司翟镇煤矿 | Method for improving and processing hillock surface body |
| CN103975738A (en) * | 2014-05-15 | 2014-08-13 | 淮南矿业(集团)有限责任公司 | Vegetation construction method based on gangue pile |
| CN103975738B (en) * | 2014-05-15 | 2016-02-10 | 淮南矿业(集团)有限责任公司 | Based on the vegetation construction method of bastard coal clitter |
| CN109328518A (en) * | 2018-08-20 | 2019-02-15 | 江苏绿岩生态技术股份有限公司 | A kind of ecological restoring method of Gangue Hill |
| CN109763499A (en) * | 2019-01-07 | 2019-05-17 | 四川川煤华荣能源股份有限公司 | For big height difference, the comprehensive processing method of abrupt slope drop coal gangue hill |
| CN110984188A (en) * | 2019-12-06 | 2020-04-10 | 安徽师范大学 | Comprehensive treatment process for waste rock hill |
| CN110984188B (en) * | 2019-12-06 | 2022-04-12 | 安徽师范大学 | Comprehensive treatment process for waste rock hill |
| WO2022160483A1 (en) * | 2021-01-28 | 2022-08-04 | 山西大学 | Method for restoration and treatment of coal gangue mountain using coal-based solid waste |
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