出汗
发表于 2025-3-26 22:13:49
Mining-Related and Tectonic Seismicity in the East Mountain Area Wasatch Plateau, Utah, U.S.A.,ay of 20 portable seismographs were used to investigate seismicity in the East Mountain area, an area of active underground coal mining and intense microseismicity. Eight stations of the subarray were concentrated on top of East Mountain, about 600 m above mine level, at an average spacing of 2 to 3
Commonwealth
发表于 2025-3-27 02:41:47
Observations of Mine Seismicity in the Eastern Wasatch Plateau, Utah, U.S.A.: A Possible Case of Imtain in the eastern Wasatch Plateau, Utah. During a six-week period, approximately 3,000 seismic events were observed of which the majority were impulsive, higher frequency ( > 10 Hz), short duration ( < 2–3 sec) events probably associated with the caving of the roof from a longwall operation. In co
是贪求
发表于 2025-3-27 08:45:48
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寒冷
发表于 2025-3-27 12:48:13
The Alabama, U.S.A., Seismic Event and Strata Collapse of May 7, 1986,oof collapse in an active longwall coal mine. Visual inspection of the seismograms reveals a deficiency in energy at frequencies above 20 Hz compared to tectonic earthquakes or surface blasts. The predominance of energy below 5 Hz may explain reports of body wave magnitudes (..) greater than 4.2. Al
合乎习俗
发表于 2025-3-27 15:08:25
,Induced Seismicity in Mines in Canada—An Overview, the severity, and in some cases the frequency, of mine-induced tremors has increased as mining extends to greater depths and at accelerated rates of extraction. Because of the complex design and large areal extent of many mines (potash, coal and metalliferous), the most feasible and practical way t
虚度
发表于 2025-3-27 21:41:00
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gastritis
发表于 2025-3-28 00:38:32
Microseismicity in a Flooded Potash Mine, the Hope Mine, Federal Republic of Germany,te temporal relationship between brine introduction and onset of microseismic activity. The spatial distribution of the sources indicates a dependence on brine level height. Sources are found preferentially immediately next to roads and workings. Source radii, estimated from the frequency ranges in
Madrigal
发表于 2025-3-28 05:16:58
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衣服
发表于 2025-3-28 09:22:18
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acolyte
发表于 2025-3-28 12:30:19
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