Results 21 to 30 of about 516 (164)
Shuitu Baochi Xuebao, 2023 表土回覆是露天煤矿排土场生态修复的关键步骤,覆土厚度直接影响植物生长和复垦成本,为研究露天煤矿排土场不同覆土厚度对土壤水分入渗及植物水分利用的影响,采用室内土柱模拟试验,设置10,20,30,40,50 cm共5个覆土厚度,分别进行垂直入渗试验和室内盆栽试验(玉米),并结合氢氧同位素稳定示踪技术,研究不同覆土厚度土壤入渗和玉米水分利用特征,筛选研究区排土场最佳覆土厚度。结果表明:覆土厚度为10~30 cm(27.05~33.02 mm/min)的初始入渗速率显著高于40~50 cm(21.59~24 ...
张雅楠, 吕刚
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Rapid Identification and Extraction of Anthropogenically Disturbed Regions Resulting from Production and Construction Projects in Hubei Province from 2017 to 2021 [PDF]
, 2023 [Objective] This study attempted to identify and extract anthropogenic disturbance areas resulting from production and construction projects in Hubei Province from 2017 to 2021.
Hua Li +3 more
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Shuitu Baochi Xuebao, 2023 为探究石河子灌区、新湖总场灌区、莫索湾灌区之间土壤温室气体排放的差异性,通过长期的野外观测及样品采集,采用静态箱—气相色谱法,于2019年棉花出苗期、花铃期、吐絮期对玛纳斯河流域石河子灌区、新湖总场灌区、莫索湾灌区棉田土壤温室气体进行日观测,应用统计学方法,并结合土壤温度、含水量、pH、有机碳、铵态氮、硝态氮等因素分析。结果表明:(1)土壤CO2和N2O具有明显的季节变化和日变化,土壤CO2和N2O排放通量的峰值出现在花铃期,分别为527.160,1.713 mg/(m2·h)。同时 ...
张梦洁 +3 more
doaj
Driving risk assessment and prevention strategies for autonomous vehicle in open-pits [PDF]
, 2023 Driving risk assessment and protection is the critical technology of unmanned transportation systems in open-pits. In order to warrant the safe operation of unmanned vehicles in open-pits, the Driving Security Model (DSM) based on the vehicle-road-cloud ...
Bin ZHOU +6 more
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Shuitu Baochi Xuebao, 2002 露天矿排土场的严重水土流失 ,导致周边土壤盐渍化和草场退化 ,是草原露天矿区环境治理的关键和重点。因随机排土 ,大部分排土场的表层土壤为深层绿色泥岩土 ,不适于植物生长 ,治理难度很大。风蚀作用是限制排土场植被恢复的主要因素 ,而一定密度的人工灌丛可以减轻排土场平台的风蚀强度 ,形成地表凋落物覆盖层 ,改良土壤 ,加速植被的恢复。沙棘是草原露天矿排土场理想的复垦植物 ,可以在短时期内形成郁闭的人工沙棘灌丛 ,土壤培肥和水土保持效果显著 ,并明显减缓坡下草场盐渍化程度。因此 ,以沙棘为主的人工灌丛 ...
台培东 李文杰 等
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Shuitu Baochi Xuebao, 2020 选择晋陕蒙接壤区永利煤矿排土场沙打旺草地、紫花苜蓿草地、沙棘林地和原地貌草地土壤水分为对象，研究其蒸散、剖面分布、时间变化等特征，以期揭示土体重构及不同复垦植被模式对土壤水分及其时间稳定性影响。结果表明：排土场3种人工植被条件下土壤平均含水量同原地貌草地相比提高了50.7%~62.3%，另外，沙打旺复垦草地土壤含水量显著低于苜蓿复垦草地和沙棘复垦灌木林地（均降低了7.2%）。沙打旺和苜蓿会导致深层（120—260，120—220 cm）土壤水分亏缺，但有利于20—80 cm的土壤水分的保持 ...
张燕乐, 甄庆, 张兴昌, 马炳召
doaj
Shuitu Baochi Xuebao, 2022 土壤水分是制约黄土高原地区生态恢复与重建的关键性因子,探究土壤水分的增加和储存是排土场边坡土地复垦和生态系统重建的重要内容。通过塑造水平阶(阶宽1 m,阶长2 m,每个水平阶间距1 m)、鱼鳞坑(长60 cm,宽40 cm,深30 cm,每个鱼鳞坑横排间距1 m,行间距1 m)工程措施,并以未塑造地形作为对照组进行人工模拟降雨试验,选择山西平朔安太堡露天煤矿南排土场边坡为研究区,在模拟降雨期间对土壤剖面不同土层深度(0—10,10—20,20—40 cm)的水分进行动态监测 ...
王悦 +4 more
doaj
, 2007 揭示了土工布提高加筋土强度的力学机理.假设:平行、分层布置的土工布在垂直布面方向是连续分布的;土工布是薄膜,不影响物料的力学特性:土工布、物料、加筋土的变形是相同的:加筋土的应力状态是土工布与物料二者应力状态的叠加;加筋土的破坏只发生在物料中.提出了土工布单元,给出它与加筋土单元、物料单元间变形受力关系.结论:土工布承担了拉力,削弱了物料分担的荷载,提高了加筋土的强度;据此 ...
于永江, 姚再兴, 王来贵
core
Optimization of the remaining ditch mode and parameters for end-wall covered of open pit coal mine with partition and inner dumping [PDF]
The development of large open-pit coal fields with high safety and efficiency is the trend of open-pit coal development. With partitioned mining as the main development mode, the large open-pit coal field has the significant advantages of safety and ...
Hengrong WANG +5 more
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Systematic nature positive markets
Conservation Biology, Volume 38, Issue 3, June 2024.Abstract Environmental markets are a rapidly emerging tool to mobilize private funding to incentivize landholders to undertake more sustainable land management. How units of biodiversity in these markets are measured and subsequently traded creates key challenges ecologically and economically because it determines whether environmental markets can ...
Alex Bush +2 more
wiley +1 more source