Zobrazeno 1 - 10
of 634
pro vyhledávání: '"karst water"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-13 (2024)
Abstract The sudden inrush of water poses a serious threat to the safety of workers during tunnel construction in the karst region of southwest China. To mitigate this risk, a model is proposed to assess the risk of water surge through a tunnel by co
Externí odkaz:
https://doaj.org/article/3c4c5fab09224dd18071cf8d37ca8340
Autor:
Dan Su, Zhongfa Zhou, Xiaohuan Gong, Lihui Yan, Shengjun Ding, Hui Dong, Ye Zhang, Xiaoduo Wang
Publikováno v:
All Earth, Vol 36, Iss 1, Pp 1-17 (2024)
ABSTRACTNitrogen mainly exists as nitrate in aqueous environments. In karst areas, nitrate pollution caused by anthropogenic activities severely endangers aqueous systems. In order to identify nitrate sources, nitrate in the cave water of Mahuang Cav
Externí odkaz:
https://doaj.org/article/1cb43aaca59144249cdb607a814d8b26
Publikováno v:
地质科技通报, Vol 43, Iss 3, Pp 301-310 (2024)
Objective In the central Yunnan region, the geological structure is complex and karst formations are prevalent. Sudden water gushing and attenuation of spring flow are among the most difficult problems in tunnel construction. The Mengkuanggou karst w
Externí odkaz:
https://doaj.org/article/908e02207f1d4250a271742750a36e4e
Publikováno v:
地质科技通报, Vol 43, Iss 2, Pp 268-282 (2024)
Objective To establish a series of hydrogeological parameter for karst areas in North China, an on-site experimental study on water balance has been carried out since the 1980s in a closed spring-drainage karst water system in Yangzhuang, Shandong Pr
Externí odkaz:
https://doaj.org/article/8f1110c5fbf84b769ec98837b6638b30
Publikováno v:
地质科技通报, Vol 42, Iss 4, Pp 147-153 (2023)
Objective Karstic spring water is an important source of water supply for the karst areas of northern China. To rationally evaluate and scientifically exploit karstic water resources, it is important to identify the recharge, runoff and discharge con
Externí odkaz:
https://doaj.org/article/844cfb574d0a4cb89650fecc13633ddd
Publikováno v:
地质科技通报, Vol 42, Iss 4, Pp 183-193 (2023)
Objective The Kuncheng Tunnel of the Central Yunnan Water Diversion Project crosses the Heilongtan and Bailongtan areas, the major headwater regions in the Chenggong District of Kunming City. Methods Tunnel water inrush may seriously threaten the saf
Externí odkaz:
https://doaj.org/article/37bc9bc2df4a4e53b2e0bbb2ef42f380
Autor:
Changgeng Hu
Publikováno v:
Frontiers in Earth Science, Vol 11 (2023)
The construction of expressway tunnels in karst areas faces many challenges under complex geological conditions. It is of great scientific and engineering significance to study the deformation and failure laws of tunnels and surfaces. Taking the Qili
Externí odkaz:
https://doaj.org/article/3ed85af05a1d47ff9905ae021657089d
Publikováno v:
Meikuang Anquan, Vol 54, Iss 3, Pp 212-220 (2023)
Ordovician limestone karst water hazard is the key threat to deep mining in north China type coal field. Complicated distribution of karst water is the main reason of the hazard. The transverse distribution of karst fissures in Xinwen coalfield was s
Externí odkaz:
https://doaj.org/article/c6fb6f291d484baebec830ba0a452b91
Publikováno v:
Meitan kexue jishu, Vol 51, Iss 3, Pp 201-211 (2023)
In view of the fact that there were as many as 10 to 13 layers of limestone in Taiyuan formation in Huainan and Huaibei Coalfield, the target strata of ground regional treatment was not unique, the 18413 working face in the west 4th mining area of Pa
Externí odkaz:
https://doaj.org/article/040cd584fe7e43698e51d1ad4006f5f6
Publikováno v:
Water, Vol 16, Iss 6, p 829 (2024)
Frequent surface water–groundwater interactions and prevalent anthropogenic inputs make karst water systems vulnerable to human disturbance. As a typical karst region in North China, the Jinan Spring Catchment has become increasingly threatened due
Externí odkaz:
https://doaj.org/article/0f010b6cc4224d61b5b0bf810d68a550