冥想后
发表于 2025-3-28 16:57:52
Prevention and Control of Mine Water Hazards from Underlying Aquifers,rimary mining target, while the #9 coal seam is the secondary target. The mine has been in operation for more than 30 years since it was completed in December 1983. The designed production capacity is 1.8 million t/year, and the current approved production capacity is 3.35 million t/year. Dongpang M
Paraplegia
发表于 2025-3-28 20:45:44
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不真
发表于 2025-3-29 00:41:36
Technologies in Sealing Massive Karst Conduits in Restoration of a Flooded Open Pit Quarry in Westa river to a nearby limestone quarry. A total of over 12,800 m. of slurry, low mobility grouts, and hot bitumen were injected to depths of over 60 m along a 460-m long curtain in several phases. The value of real time monitoring of all relevant hydrogeological as well as grouting parameters during
fertilizer
发表于 2025-3-29 07:02:44
Environmental Impact Assessment in Hongliulin Coal Mine,in the south, the Erlintu exploration area in the west, and the Caragana tower and Zhangjiamao mine field in the north. The mining depth ranges from 1160 to 990 m amsl. The planned production capacity is 12 Mt/a. The mining area is approximately 20 km long from east to west, and 8 km wide from north
咯咯笑
发表于 2025-3-29 11:18:52
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平淡而无味
发表于 2025-3-29 13:30:31
Water Hazards in Coal Mines and Their Classifications,bodies, or underground mine pools. Mine water inrush generally occurs dramatically and can flood underground workings in a short period of time, jeopardizing mine production and causing casualties (Gui et al., J Geosci 10:180, .; Zhang et al., Arab J Geosci 10:503–513, .; LaMoreaux et al., Carbonates Evaporites 29:141–145, .).
reflection
发表于 2025-3-29 19:06:12
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路标
发表于 2025-3-29 22:27:48
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