Method and device for stabilising an underground broken out cavity

摘要

Process for stabilizing a hollow chamber (4) formed during mining comprises using an upsetting body (7) formed as an upsetting element containing particles, preferably expanded glass or plastic particles, embedded in a binder, preferably cement or plastic, and reinforcing elements made from steel, plastic or glass. An independent claim is also included for a device for stabilizing a hollow chamber formed during mining. Preferred Features: The upsetting body has a compression strength of at least 1 MPa and a hollow chamber amount of 10-90 % of the total volume. The reinforcing elements are steel fibers.