Shield type support for use in underground mining with lemniscat

Details Shield type support for use in underground mining with lemniscat Shield type support for use in underground mining with lemniscat

1979-08-22

1980-11-04

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405295, E21D 1544

Patent

active

042316847

ABSTRACT:
A shield type support for use in underground mining comprises a floor construction with one or more pressure operated extensible and retractable rams mounted on the floor and connected at their upper end to a roof-member. The roof-member is articulated at one end to a breaking shield which has an opposite end which is supported by lemniscate guide rods. The lemniscate guide rods are carried on a support which is mounted for adjustable movement on a column supported on the floor. In addition, this support also advantageously carries an additional adjusting element in the form of a telescopically retractable and extensible ram connected between the support and the roof structure at a spaced location from the other rams.

REFERENCES:
patent: 3959976 (1976-06-01), Blumenthal
patent: 4027489 (1977-06-01), Walker et al.
patent: 4102140 (1978-07-01), Allen

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