Method for controlling stress and increasing the strength of sup

Details Method for controlling stress and increasing the strength of sup Method for controlling stress and increasing the strength of sup

1974-09-03

1976-04-06

Gilliam, Paul R.

Mining or in situ disintegration of hard material

Processes

Forming blocks

299 11, E02D 314, E02D 300

Patent

active

039480550

ABSTRACT:
A method for controlling stress and increasing the load-bearing strength of support members, the support members comprising coal, of a coal mine wherein the method consists essentially of injecting ammonia or hydrochloric acid into the interior portions of the support members.

REFERENCES:
patent: 1532826 (1925-04-01), Lessing
patent: 3600040 (1971-08-01), Dareing
patent: 3850477 (1974-11-01), Aldricm et al.
patent: 3851478 (1974-12-01), Ayres

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