05180251 is referenced by 19 patents and cites 13 patents.

A dump sitting on the ground is isolated by first driving a tunnel longitudinally through the ground underneath the dump, then cutting from at least one side of the tunnel with a longwall-mining machine a longitudinally and transversely extending slit having a lower end opening into the tunnel and an upper end opening at ground level, and providing a liquid barrier in the slit underneath the dump. The material dug by the machine to form the slit is first conveyed downward along the slit into the tunnel and thence along and out of the tunnel. Stowing material is brought into the slit from the upper end thereof to backfill behind the machine. The cutting machine itself can be a standard cutter head with a longwall conveyor and a set of following props that hold up the roof behind the cutter until this area is backfilled.

Title
Underground protection underneath a dump
Application Number
7/714250
Publication Number
5180251
Application Date
June 11, 1991
Publication Date
January 19, 1993
Inventor
Roland Paurat
Blumenstrasse 11, D-4230 Wesel 13 both of
DE
Friedrich W Paurat
Kasselweg 29, D-4230 Wesel 1
DE
Agent
Andrew M Wilford
Herbert Dubno
IPC
B09B 1/00
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