向外
发表于 2025-3-26 23:28:17
Seismo-Acoustic Method for Determining the Efficiency of Measures to Combat Rock Bursts,The main measures presently employed for reducing danger in burst-prone seams include working protective seams, drilling advance boreholes, “torpedoing,” inducer shotfiring, infusion, etc. They are aimed at relaxing stresses in the saem, degasification, or heightening the resistance of the face to rock bursts.
搬运工
发表于 2025-3-27 04:35:12
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ARC
发表于 2025-3-27 06:12:47
Simple Piezoelectric Accelerometer Geophones for Geophysical Laboratory Investigations,ck specimens or standard materials in presses or under dynamic loading (impact or explosive). As no suitable equipment (in particular, geophones for laboratory use) is made commercially, experimenters have been forced to construct their own.
草率男
发表于 2025-3-27 13:23:42
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Precursor
发表于 2025-3-27 14:04:07
The ZUA-2-VCh Seismo-Acoustic Equipment,k bursts and other dynamic phenomena such as shock bumps, roof slumping, etc.; the method used is the recording and analysis of seismo-acoustic data which show that the solid coal is in a state of stress.
按时间顺序
发表于 2025-3-27 19:21:51
A Two-Coil Galvanometer for Modulation with a Very-Low-Frequency Amplifier,sing a mirror galvanometer driven by the emf from a seismograph or other transducer. This method gives accurate and detailed records, even of weak processes. Its main defect is the large, unproductive expenditure of photographic materials.
滴注
发表于 2025-3-27 22:32:18
Seismo-Acoustic Determination of the Boundaries of Zones in Coal Seams Subject to Rock Bursts, . Rock bursts have been found in faulted zones more than once. However, the statistical data on actual bursts are not adequate to prove that the danger areas in all seams are zoned. The zoning question remains debatable, and practical observations are needed to settle it.
Glucocorticoids
发表于 2025-3-28 04:41:30
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Felicitous
发表于 2025-3-28 07:25:40
https://doi.org/10.1007/978-1-4757-0124-1acoustics; calibration; coal; construction; development; engine; geophysics; instruments; mining; physics; res
积习难改
发表于 2025-3-28 12:59:29
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