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2020
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Invention
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Apparatus for protecting roof tray when gob-side entry retaining end support migrates. An apparat... |
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2019
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Invention
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Discrete element method for modelling a fracture evolution of a roadway surrounding rock. A discr... |
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Invention
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Prefabricated stairs modular assembly mold and assembling method thereof. A prefabricated stair m... |
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Invention
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Discrete element method for simulating evolution of cracks in rock surrounding roadway. Disclosed... |
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Invention
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Rational width determination method for gob-side entry driving narrow coal pillar based on crack ... |
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Invention
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Beam-column non-open-hole connection node of modular steel structure building and assembly method... |
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Invention
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Prefabricated assembled staircase modular assembly mold and mounting method therefor. A prefabric... |
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Invention
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Apparatus for protecting top plate tray during gob-side entry retaining end bracket migration. An... |
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2018
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Invention
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Blind bolt fastening device. The present invention discloses a blind bolt fastening device, and b... |
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Invention
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One-side bolt fastening device. A one-side bolt fastening device relating to the technical field ... |
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Invention
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Bag-shaped filling structure for underground coal mine and use method therefor. A bag-shaped fill... |
