Grid composite for longwall shield recovery in underground coal

Details Grid composite for longwall shield recovery in underground coal Grid composite for longwall shield recovery in underground coal

1991-12-06

1993-04-06

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

299 12, 299 33, 4053023, E21D 2303

Patent

active

051998254

ABSTRACT:
A grid composite for protecting men and longwall mining equipment during longwall shield recovery includes a regular polymer geogrid structure formed by biaxially drawing a continuous sheet of select polypropylene material which is heat bonded to a polyester fabric. The grid composite is secured over caving shields of longwall mining equipment during a longwall mining operation.

REFERENCES:
patent: 4003208 (1977-01-01), Hornung et al.
patent: 4190292 (1980-02-01), Johannes et al.
patent: 4229043 (1980-10-01), Bell et al.
patent: 4896993 (1990-01-01), Bohnhoff
patent: 4992003 (1991-02-01), Perach
Coal-Feb. 1990.
Longwall Mining-pp. 14-19.
Underground Mining Systems and Equipment-pp. 12-74 through 12-95.

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