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Impact of interlayer on moisture characteristics of reclaimed soil backfilled with Yellow River sediments

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International Journal of Agricultural and Biological Engineering 2020年第1期13卷 153-159页

作者： Xiaotong Wang zhenqi hu Yusheng Liang Institute of Land Reclamation and Ecological Restoration China University of Mining and Technology(Beijing)Beijing 100083China China College of Environment Science and Spatial Informatics China University of Mining and TechnologyXuzhou 221116China

Underground coal mining causes land subsidence,and backfilling with Yellow River sediment is an effective reclamation technology to restore farmland in *** date,two-layer soil reconstructed(TSR)for subsided land reclamation resulted in poor capacity to retain *** solve this problem,multi-layered soil reconstructed(MSR),sandwiching soil interlayers between sediment,was developed as a new reclamation strategy with Yellow River *** order to evaluate the impact of soil interlayer on moisture characteristics,laboratory experiments of infiltration and evaporation were *** control treatments(CK1,CK2)and four experimental treatments(T1-T4)were ***1 was undamaged farmland,CK2 was conventional reconstructed two-layers soil profile(filled sediment with 40 cm soil cover).T1-T4 were multiple-layers soil profiles sandwiching different structures of soil interlayers between sediment *** results indicated that putting interlayers into sediment reduced water leakage and water evaporation,improved the water-holding capacity of conventional two-layer soil *** total thickness of soil interlayers of 30 cm(T3 and T4)was better than 20 cm(T1 and T2)and two soil interlayers(T2)were better than one(T1)on water-holding ***,the best reconstructed soil profile was T3,sandwiched two soil interlayer and the first thickness was 20 *** treatment had the greatest improvement on soil water holding capacity with an increase of 49.14%compared to CK2 at the end of the evaporation and was closest to CK1(402.31 mm).This study provided experimental evidence that compares with TSR,MRS improved the moisture characteristics of backfilling with Yellow River sediment.

关键词： land reclamation Mining subsidence Yellow River sediment multi-layered soil reconstructed moisture characteristics

Sediment settlement rate and consolidation time of flling reclamation in coal mining subsidence land

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International Journal of Coal Science & Technology 2022年第3期9卷 232-246页

作者： Linghua Duo zhenqi hu Kun Yang Yanan Li Faculty of Geomatics East China University of TechnologyNanchang 30013China School of Environment and Spatial Informatics China University of Mining and TechnologyXuzhou 221116China Institute of Land Reclamation and Ecological Restoration China University of Mining and Technology(Beijing)D11 Xueyuan RoadHaidian DistrictBeijing 100083China

With the continuous growth of the population and the continuous reduction of cultivated land,China’s food security is greatly *** addition,China’s coal mining has been mainly underground mining,causing land subsidence and damaging existing cultivated *** efect intensifes the contradiction between the growth of the risk population and the reduction of cultivated *** reclamation of mining subsidence land with Yellow River sediment is often used as an efective way to improve the recovery rate of cultivated *** the reclamation time and realizing continuous flling are signifcant *** work presented in this paper studied the sediment settlement rate and consolidation time by combining theory,feld flling and reclamation tests and numerical simulations.A feld flling test study was carried out in the lowlands of Jibeiwang Village,Qihe County,Shandong Province,*** calculating the drainage consolidation time,the consolidation factor of 0.015656 m^(2)/d,and the time factor for sediment consolidation of 0.575 were *** sediment consolidation time for this test was 9.18 *** calculation of sediment deposition rate and consolidation time is of great practical signifcance to guide the Yellow River sediment flling,realize continuous flling,and save reclamation time and cost.

关键词： Yellow River sediment Mining subsidence land Filling reclamation Consolidation time

A review of UAV monitoring in mining areas: current status and future perspectives

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International Journal of Coal Science & Technology 2019年第3期6卷 320-333页

作者： He Ren Yanling Zhao Wu Xiao zhenqi hu State Key Laboratory of Water Resources Protection and Utilization of Coal Mining Beijing 100083 People's Republic of China Institute of Land Reclamation and Ecological Restoration China University of Mining and Technology (Beijing) Beijing 100083 People's Republic of China School of Public Affairs Zhejiang University Hangzhou 310058 People's Republic of China School of Environment Science and Spatial Information China University of Mining and Technology Xuzhou 221116 People's Republic of China

With the emergence and development of unmanned aerial vehicles (UAVs), different sensors have become more miniaturized and intelligent. UAVs equipped with various sensors are now an important approach for acquiring spatial data. Many advantages, such as low cost, short revisiting cycle, flexibility and high precision, have made UAVs powerful tools in geological, agricultural, ecological and forestry growth monitoring, as well as evaluation. Now, UAVs are a hotspot in scientific research. Their application in mining areas (MA), although still in its infancy, is developing rapidly in terms of speed, scale and service scope. This research examines aspects such as UAV platforms, different sensors and their application fields, as well as reviewing the advances of scientific research in MA at the present time. By combining current research and the functions of multiple sensors, an application framework for UAV monitoring in MA is constructed. Finally, the challenge and prospects for the development of UAVs and sensors are also considered. This research hopes to provide a technical reference, expanding the knowledge and recognition of UAV monitoring in MA, as well as an assessment of applications in mining, reclamation and environment.

关键词： UAV Sensor Mining areas Monitoring

Zoning of land reclamation in coal mining area and new progresses for the past 10 years

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International Journal of Coal Science & Technology 2014年第2期1卷 177-183页

作者： Wu Xiao zhenqi hu Yanhua Fu Institute of Land Reclamation and Ecological Restoration China University of Mining and Technology(Beijing)Beijing 100083China

Coal mining disturbed land is the main sources of land reclamation in *** the rapid increase of economy and coal production,more and more land has been disturbed by construction and coal mining;thus,land reclamation has become highlights in the past 10 years,and China is boosting land reclamation in mining *** characteristics vary from region to region,according to natural and geological conditions,coal mining area land reclamation was divided into 3 zones,which are eastern,western and *** strategies are focused on prime farmland protection in eastern and ecological restoration in western and southern zones,*** innovative reclamation technologies and theories for the past 10 years were introduced in this paper,including concurrent mining and reclamation,Yellow river sediments backfilling,self-reclamation,and topsoil alternatives in opencast ***,in the government regulation and legal system building respect,several important laws and regulations were issued and implemented in the past 5 years,promoting land reclamation management and supervision *** reclamation is and will still be one of the most important parts of coal industry in the future,and more efforts and funds are expected to get involved.

关键词： Land reclamation Zoning Concurrent mining and reclamation Yellow river sediments Self-reclamationLand reclamation regulation

Surface movement and deformation characteristics due to high- intensive coal mining in the windy and sandy region

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International Journal of Coal Science & Technology 2016年第3期3卷 339-348页

作者： zhenqi hu Chao Chen Wu Xiao Xinjing Wang Mingjie Gao Institute of Land Reclamation and Ecological Restoration China University of Mining and Technology (Beijing)Beijing China College of Resource and Environment North ChinaU niversity of Water and Electric Power Zhengzhou China

As China＇s energy strategy moving westward, the surface movement and deformation characteristics due to high-intensive coal mining in the windy and sandy region become a research hotspot. Surface movement observation stations were established to monitor movement and deformation in one super-large working face. Based on field measurements, the surface movement and deformation characteristics were obtained, including angle parameters, subsidence prediction parameters, etc. Besides, the angle and subsidence prediction parameters in similar mining areas are summarized; the mechanism of surface movement and deformation was analyzed with the combination of key stratum theory, mining and geological conditions. The research also indicates that compared with conventional working faces, uniform subsidence area of the subsidence trough in the windy and sandy region is larger, the trough margins are relative steep and deformation values present convergence at the margins, the extent of the trough shrink towards the goaf and the influence time of mining activities lasts shorter; the overlying rock movement and breaking characteristics presents regional particularity in the study area, while the single key stratum, thin bedrock and thick sand that can rapidly propagate movement and deformation are the deep factors, contributing to it.

关键词： Windy and sandy region High-intensive mining Surface movement and deformation Key stratum

A drone‑and feld‑based investigation of the land degradation and soil erosion at an opencast coal mine dump after 5 years’evolution of natural processes

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International Journal of Coal Science & Technology 2022年第3期9卷 50-66页

作者： Wu Xiao He Ren Tao Sui Heyu Zhang Yanling Zhao zhenqi hu Department of Land Management Zhejiang UniversityHangzhou 310058China Institute of Land Reclamation and Ecological Restoration China University of Mining and Technology(Beijing)100083 BeijingChina Guangzhou South China Institute of Natural Resources Science and Technology Guangzhou 510642China

Opencast coal mining has a large impact on the land surface,both at the mining pits themselves and at waste *** artifcial management is stopped,a reclaimed opencast coal mine dump is afected by wind and water erosion from natural processes,resulting in land degradation and even safety *** this paper,the soil erosion and land degradation after 5 years of such natural processes,at the Xilinhot opencast coal mine dump in Inner Mongolia,were investigated.A multisource data acquisition method was applied:the vegetation fraction coverage(VFC)was extracted from GF-1 satellite imagery,high-precision terrain characteristics and the location and degree of soil erosion were obtained using a drone,and the physical properties of the topsoil were obtained by feld *** this basis,the degree and spatial distribution of erosion cracks were identifed,and the causes of soil erosion and land degradation were analyzed using the geographical *** results show that(1)multi-source data acquisition method can provide efective basic data for the quantitative evaluation of the ecological environment at dumps,and(2)slope aspect and VFC are the main factors afecting the degree of degradation and soil *** on above analysis,several countermeasures are proposed to mitigate land degradation:(1)The windward slope be designed to imitate the natural landform.(2)Reasonable engineering measures should be applied at the slope to restrain soil erosion.(3)The Pioneer plants should be widely planted on the platform at the early stage of reclamation.

关键词： Coal mine dump Ecological restoration Drone Soil erosion Ecosystem stability Geographical detector

Utilization of coal fly ash and municipal sewage sludge in agriculture and for reconstruction of soils in disturbed lands： results of case studies from Greece and China

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International Journal of Coal Science & Technology 2018年第1期5卷 64-69页

作者： Christos D. Tsadilas zhenqi hu Yinli Bi Thomai Nikoli Institute of Industrial and Forage Crops Hellenic Agricultural Organization "DEMETER" 1 Theophrastos Street 413 35 Larissa Greece Institute of Land Reclamation and Ecological Restoration China University of Mining and Technology D11 Xueyuan Road Haidian District Beijing 100083 China

Coal fly ash （CFA） and municipal sewage sludge （MSS） management is a great concern worldwide. An alternative gaining high interest, is their use in agriculture and for reclamation of degraded lands. The purpose of this paper was to present very briefly the results of some case studies carried out in China and Greece related to land reclamation and agricultural use of CFA and MSS separately or combined. An experiment in Platanoulia area, central Greece showed clearly that CFA applied together with MSS at appropriate rates increased substantially wheat grain and biomass yield and improved soil quality （increased soil pH, organic matter content, total nitrogen, available P and boron）. In a long-term experiment carried out in huaibei city, Anhui province, China with a reconstructed soil in a subsided land by using CFA, it was found that physicochemical characteristics （infiltration rate, bulk density, total nitrogen, available P and extractable K） tended to be improved over time. In another experiment in Rodia area central Greece, MSS application improved soil quality of limestone mining spoils from bauxite mining activities. Several other experiments with MSS in Greece showed a clear positive effect on cotton and maize yield and on soil quality.

关键词： Coal fly ash Municipal sewage sludge Soil quality Land reclamation

Assessment of several typical physical properties of reclaimed farmland filled with Yellow River sediment in Jining, China

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International Journal of Coal Science & Technology 2018年第1期5卷 36-46页

作者： zhenqi hu Peijun Wang Russell S. Yost Fang Shao Linghua Duo Institute of Land Reclamation and Ecological Restoration China University of Mining and Technology (Beijing) D11 Xueyuan Road Haidian District Beijing 100083 China College of Resources and Environment Fujian Agricultural and Forestry University Fuzhou Fujian China Department of Tropical Plant and Soil Sciences University of Hawai'i at Manoa Honolulu HI 96822 USA

Land subsidence caused by underground coal mining is one of the most prominent environment problems in China. The reclamation of mining subsidence land with Yellow River sediment was considered to be feasible, but its effectiveness needs to be verified. An integrated reclamation technology with Yellow River sediment was evaluated using a comparison of actual crop production soil profile analysis in Jining City, China. The results indicated that reconstructed soil profile of the reclaimed farmland was less effective in retaining water and in supporting plant growth than that of the unaltered farmland. Some measures are proposed, such as reducing the drainage velocity to allow sedimentation and retention of the clay and silt, changing the techniques of filling the Yellow River sediment and increasing the organic matter content in the soil layers to improve the capacity to retain water in the reclaimed farmland.

关键词： Yellow River sediment Mining subsidence land Land reclamation Soil physical properties Available water-holding capacity

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矿山复垦土壤重构的理论与方法

煤炭学报 2022年第7期47卷 2499-2515页

作者：胡振琪中国矿业大学环境与测绘学院江苏徐州221116

土壤是生物之基,土壤重构是矿山土地复垦与生态修复的关键和基础。目的是革新土壤重构理念,凝练和提升土壤重构理论与方法,为矿区土地复垦与生态修复独特基础理论提供支撑。回顾了矿山复垦土壤重构的研究历史,从单元土体空间重构的视角... 详细信息

土壤是生物之基,土壤重构是矿山土地复垦与生态修复的关键和基础。目的是革新土壤重构理念,凝练和提升土壤重构理论与方法,为矿区土地复垦与生态修复独特基础理论提供支撑。回顾了矿山复垦土壤重构的研究历史,从单元土体空间重构的视角,提出了四维重构的概念,即垂直方向(Z)的土壤剖面重构、水平方向(X,Y)的地貌重塑、时间维(t)方向的土壤改良,其中垂向剖面重构是土壤重构的核心,也是土壤重构的狭义概念。总结国内外矿山生态修复成功经验与失败教训,依据土壤发生学原理和师法自然的理念,提出了“土层生态位”和“土壤关键层”的概念,认为不同土层有其独特的生态功能和空间位置,将各个土层在空间的位置及其与相关土层之间的功能关系与作用,称为“土层生态位”;将影响土壤整体功能和生产力的关键土层,称为“土壤关键层”。矿山复垦土壤剖面重构的原理就是以土层生态位为理论基础、土壤关键层为构造核心,设计和优化土壤剖面构型并付诸实施的过程,其核心是优化设计各个土层生态位、确定和优化关键层。因此,土壤剖面重构方法就是在深入分析自然土壤剖面结构和损毁土地特征的基础上,基于需求确定重构土壤剖面的目标;然后对每一土层空间生态位适宜度进行分析;再通过土层生态位的空间位、宽度、重叠、差距和竞争等要素分析,确定可能的土壤剖面构型和关键层;最后通过室内外种植试验或模拟试验验证与筛选,从而获得最佳生产力功能的土壤剖面构型。基于这一原理和方法,提出了“分层剥离、交错回填”的土壤重构技术工艺原理,“分层”是满足“土层生态位”和“关键层”构造的要求,“交错”是实现土壤重构连续、高效的施工工艺,并以露天煤矿采复一体化和采煤塌陷地挖深垫浅复垦为例介绍了土壤重构工法。最后,以山东黄河泥沙充填复垦采煤沉陷地为例,介绍了土壤重构原理与方法的应用和实践。

关键词：矿山复垦土壤重构土壤剖面土层生态位土壤关键层原理工法