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In-mine Assessment of a Longwall Entry System.

Babich DR; Allwes RA; Wade LV
Proc soc min eng AIME 1st Int conf ground Control in Longwall Mining Honolulu 1982 :9 pages
The design of a longwall entry system is discussed in this Bureau of Mines paper. This is done primarily through the results of an in- mine case study made of two sets of longwall entries utilizing the stiff-yield pillar design concept. The rock mechanics instrumentation plan used in the case study is shown, including a description of the instrumentation layout and the types of instruments used. The analysis of the stress changes in the abutment and yield pillars is presented in detail as the longwall panels were mined. Conclusions concerning when the pillar first started to experience significant stress, pillar stress history as the longwall face approached and moved past the pillars, stress distribution within the pillars, and relative stress changes between yield and abutment pillars are discussed. The paper concludes with a discussion of the redistribution of stress in the vicinity of the longwall panel.
Publication Date
Document Type
Fiscal Year
Identifying No.
OP 52-84
NIOSH Division
Source Name
Proc. Soc. Min. Eng. AIME 1st Int. Conf., Ground Control in Longwall Mining, Honolulu, 1982, Pp.97-105
Page last reviewed: November 12, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division