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DE3309605A1
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METHOD FOR REFURBISHING PULLED PIT EXTENSION
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DE3247641A1
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Lattice girder
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DE3245599A1
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Connection for sliding arch support
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DE2817664A1
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Rigid connector for tunnel ring segment - has links at join formed with drillings for clamping bolts and enclosing collar
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DE2753470A1
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Arched mine gallery support frame - has trapezoidal clamp halves at overlap with two specially positioned securing bolts
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DE2652266A1
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Mine support structure overlapping channel clamp - hooks over top edges of channel and has pads to support bottom of channel
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DE2623448A1
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Mine gallery framework tensioning bolt - has tubes with connecting sleeves locked using key passed through tube slots
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DE2612186A1
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End connection for struts between tunnel supporting arches - incorporates two pivot pins to allow strut to slope either way
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DE2608956A1
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Yielding arch support for mine roadways - has stay width tapered from flange end to rounded head end and adjoining overlapped segments
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DE2554899A1
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Steel road arch for mines - has auxiliary segments interposed and locked between adjoining main larger segments
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DE2532910B1
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Lining framework for circular mine shaft - uses hook bolts to attach vertical spacers to horizontal rings
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