Results 81 to 90 of about 516 (164)
Simulation and analysis method for dynamic fatigue reliability of shovel stick for mining electric shovel [PDF]
In order to reduce the stick fracture caused by random load during the operation of the electric shovel in open-pit mines, a simulation and analysis method of the dynamic reliability of the stick of the electric shovel in the mining was proposed.
Chong CHEN +3 more
core +1 more source
Shuitu Baochi Xuebao, 2003 矿区水土流失是一种典型的人为加速侵蚀,存在着明显不同于原地貌的侵蚀特征:井工开采引起的地表塌陷,使地表变形、坡度加大、侵蚀加重,对地下水质也造成污染;露天开采排出的大量松散堆积物,由于地表严重压实和非均匀沉降,促使径流大量汇集,引起崩塌、滑坡、泥石流等地质灾害,同时增加了入河泥沙量,造成河道淤积、行洪困难.本文论述了采矿塌陷地、煤矸石山、排土场的水土流失特征,采矿对新增入河泥沙的影响,探讨了国内外矿区水土流失的防治所采用的工程措施和生物措施、动态监测水土流失的模型,以及今后尚需研究的内容.
吕春娟, 白中科, 赵景逵
doaj
Spatial-temporal heterogeneity of landscape ecological risk in Yushenfu Mining Area from 1995 to 2021 [PDF]
As a strong human disturbance, coal mining has affected the ecosystem service function and economic value on mining area. However, there is a lack on the comparing for the long-term spatial scale evolution of landscape ecological risk after mining ...
Benyan NING +4 more
core +1 more source
Jianzhu Gangjiegou Jinzhan, 2023 在2022年9月5日四川泸定6.8级地震中，位于震中附近的一栋地上4层的隔震建筑的隔震层正常发挥作用，上部结构和非结构构件均基本完好，但是隔震层中的铅芯橡胶支座、排水管线和隔震缝附属非结构构件等均发生了不同程度的破坏。在介绍该建筑主要震害的基础上，通过基于简化分析模型和邻近烈度仪实际强震记录的非线性地震反应分析，推测该建筑的地震反应，并重点考察铅芯橡胶支座的竖向应力在地震中可能发生的变化。结果表明，尽管该场地附近的强震记录表现出明显的近断层脉冲特性，但在其作用下 ...
陶思宇, 曲哲
doaj
Application of integrated model based on EEMD-CNN-LSTM for landslide-displacement prediction [PDF]
Objective Landslide-displacement prediction is critical when evaluating landslide stability. Despite the achievements of time-series methods based on deep-learning paradigms in predicting landslide displacement, the nonstationary, periodic, and trending
CHEN Weitao +4 more
core +1 more source
Shuitu Baochi Xuebao, 2017 为分析弃渣场入渗性能及其植被恢复效应，采用野外双环入渗和主成分分析方法，分析和评价不同恢复年限弃渣场入渗特征。结果表明：（1）弃渣场恢复年限2个月（P1）,2 a（P2）,4 a（P3）和桑树林地（P4）的初始入渗率依次为11.32，9.34，15.84，19.38 mm/min，稳定入渗率为4.64，3.62，6.71，7.81 mm/min；桑树林地的稳定入渗率为3个弃渣场的1.68，2.16，1.16倍；（2）Kastiakov模型的拟合效果优于通用经验模型、Philip模型和Horton模型 ...
李叶鑫, 史东梅, 吕, 林
doaj
Remote sensing monitoring of vegetation restoration effect based on NDVI time series data in Muli Coalfield of Qinghai Province [PDF]
The illegal mining activities in the Muli Coalfield have severely damaged the ecological environment of the Qilian Mountains, which has aroused great concern of the Party Central Committee.
Junsheng LIU +5 more
core +1 more source
Progress Analysis and Development Prospects of Soil Ecological and Environmental Effects of Interlayer Construction [PDF]
[Objective] This study systematically summarized and analyzed the current application status, technical characteristics, and environmental benefits of interlayer construction in soil improvement, nutrient cycling, ecological restoration, and crop ...
CHEN Jihong +7 more
core +1 more source
Shuitu Baochi Xuebao, 2017 为阐明开垦年限对土壤理化性质及无机碳的影响，进一步了解干旱区土地开垦进程中的土壤质量变化规律和碳吸收与存储过程，以开垦年限分明的典型区—新疆三工河流域阜北农场为研究区，调查、分析了不同开垦年限（已开垦0，1，3，5，15，30，50 a）剖面土壤的pH值、盐分、无机碳含量与储量的分布特征、变化规律及开垦年限对它们的影响。结果表明：（1）已开垦土地的土壤pH值随土层深度的增加而升高；随开垦年限的延长，0—60 cm（耕作层）的土壤pH值显著降低（P＜0.05），60—140，140—200 ...
邓彩云, 王玉刚, 李
doaj
Discussion on the theory and technical system framework of cooperative exploration of coal and strategic metal resources in coal-bearing strata [PDF]
The establishment of cooperative exploration model between coal and strategic metal resources in coal-bearing strata is the precondition for the transformation from strategic metal elements in coal-bearing strata to metal resources.
Bo DONG +6 more
core +1 more source