Results 61 to 70 of about 186 (125)

Surface grouting and water plugging technology for inclined shaft in water-rich sandy soil

Meikuang Anquan
In order to effectively reduce the uneven settlement and destructive effect of water-rich sand-soil stratum structure on coal mine inclined shaft, taking the water gushing treatment of an auxiliary inclined shaft in the west of Yushen Mining Area as an ...
Kaixiang LIU, Xiang DING, Dangwen ZHOU, Haiyu HUANG, Xiaojing HUANG, Dongwei DUAN, Jie FENG, Long PANG   +7 more
doaj   +1 more source

Science and Politics in China’s Official Water System: the Management of the Qiantang River (1927-1949) [PDF]

, 2020
Western water science and technology were introduced to upgrade China’s traditional water management methods and strategies during the Nanjing decade (1927-1937) under the Nationalist government.
Church, Sally K., Li, Haijing
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Hydrogeological structure of shallow-buried coal seam in wind erosion landform area and water-retaining coal mining method [PDF]

Xinjiang has an arid climate and scarce water resources, thus rendering the protection of water resources a major issue for coal mining. Taking the Yushuquan Coal Mine in Xinjiang as the study area, this study investigated the hydrogeological structure ...
CAI Jin, LI Jiashan, MENG Fanlin, QIAO Wei, SUN Zhihao, WANG Qiqing, WU Huijie   +6 more
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A selection methodology on reasonable width of stabilized coal pillar for retracement channel in longwall working face

Frontiers in Earth Science
In this paper, the No. 30201 working face of a specific colliery was determined as the study area in the Yushen mining area, China. The objective of this paper is to determine the optimal position for pressure regulation measures during the final mining ...
Pengfei Shan, Pengfei Shan, Pengfei Shan, Zheng Meng, Zheng Meng, Xingping Lai, Xingping Lai, Xingping Lai, Xiongfei Xue, Chenwei Li, Chenwei Li, Jindong Wang, Wei Li, Wei Li, Long Zhang, Long Zhang, Bojia Xi, Bojia Xi, Hongjun Jiang   +18 more
doaj   +1 more source

Mechanisms behind consolidation-induced water release from effective impermeable soil layers and mine water inflow prediction in coal mining

Meitian dizhi yu kantan
BackgroundIn the Yushen mining area, coal mining is gradually shifting toward areas with thick soil layers. This leads to continuous water release from the saturated soils above the hydraulically conductive fracture zones, thereby significantly ...
Tao LI, Ying GAO, Limin FAN, Junwei YANG
doaj   +1 more source

Characteristics and mechanism of strong dynamic load mine pressure in large mining height full-mechanized caving face with multiple thick and hard roof

Meitan xuebao
In view of the problems of strong mine pressure such as rapid shrinkage of hydraulic support column and easy support crushing in working face under the fully mechanized caving face with large mining height in multi-layer thick and hard roof of extra ...
Zhen ZHANG, Zhizeng HUANG, GANG XU, Xiaogang LIU, Qianjin LIU, Tielin ZHAO, Xingyu LIN   +6 more
doaj   +1 more source

Spatiotemporal change analysis of ecosystem resilience in Yushen mining area of northern Shaanxi coal base [PDF]

Acta Ecologica Sinica, 2021
openaire   +1 more source

Occurrence characteristics of Sr in coal from Tashan Coal Mine in Datong,Shanxi Province [PDF]

Datong Coalfield was intruded by igneous intrusions in both the Indosinian (Late Permian to the end of the Triassic) and the Yanshan (Late Jurassic to the Early Cretaceous) periods，which caused contact metamorphism of the coal seam. Previous studies have
Changyu MEN, Hongtao MA, Jiwei YAN, Wei LI, Wenxuan GAO, Xiaoxia SONG   +5 more
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Source of mine water during coal mining in the contiguous area of Inner Mongolia and Shaanxi [PDF]

The region where Inner Mongolia and Shaanxi converge is pivotal for the underpinning of national energy security and is also central to the ecological conservation and sustainable development of the Yellow River Basin.
Hui LI, Jian YANG
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ReCAMA regional directory of agricultural machinery manufacturers and distributors [PDF]

, 2021
This directory represents a compilation of information contributed by the members of the Regional Council of Agricultural Machinery Associations in Asia and the Pacific (ReCAMA - http://recama.un-csam.org/), a network facilitated by the Centre for ...
Centre for Sustainable Agricultural Mechanization (CSAM), UN.ESCAP   +1 more
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