placebo
发表于 2025-3-28 16:18:23
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ETHER
发表于 2025-3-28 22:11:29
Excavation design in stratified rock,sidered in the excavation design procedure. An associated issue is that, for flat-lying stratiform orebodies, the typical mining method involves entry of personnel into the mined void. The performance of the bed of rock spanning the excavation, i.e. the immediate roof, then assumes particular import
eczema
发表于 2025-3-28 23:31:57
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DEAWL
发表于 2025-3-29 04:14:05
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grudging
发表于 2025-3-29 07:25:42
Rock mechanics and mining engineering,iples of engineering mechanics to the design of the rock structures generated by mining activity. The discipline is closely related to the main streams of classical mechanics and continuum mechanics, but several specific factors identify it as a distinct and coherent field of engineering.
冰河期
发表于 2025-3-29 11:56:27
Rock mass structure,ribe the intact rock between discontinuities; it might be represented by a hand specimen or piece of drill core examined in the laboratory. The . is the total . medium containing bedding planes, faults, joints, folds and other structural features. Rock masses are discontinuous and often have heterogeneous and anisotropic engineering properties.
affect
发表于 2025-3-29 18:09:53
Blasting mechanics,medium, generated by the sudden release of the explosive’s potential energy. Control and routine application of such an intrinsically violent process represent significant feats in both chemical and mining technology.
离开就切除
发表于 2025-3-29 21:07:17
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grounded
发表于 2025-3-30 03:00:23
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Panacea
发表于 2025-3-30 04:29:24
Rock mechanics and mining engineering,uring its prescribed functional operation. The subject of ., as applied in mining engineering practice, is concerned with the application of the principles of engineering mechanics to the design of the rock structures generated by mining activity. The discipline is closely related to the main stream