| 摘要 |
A plastic foil container having two separate compartments filled with the components of a foaming mixture, is inserted into a bore drilled into loose and caving rock or coal, and broken by a pointed rod inserted into the bore so that after sealing said bore with a plug a foam mixture fills, expanding due to swelling pressure, the bore and surrounds loose and caving rock or coal and reinforces the rock after hardening, particularly when the rod is left in the bore.
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