Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Biaxial-loading Measurement for Mine-pillar Stability Evaluation - Case Studies.

Authors
Lu-PH
Source
Soc Min Eng AIME Littleton Colorado 1986 :142-151
Link
NIOSHTIC No.
10005030
Abstract
This paper presents three case studies in which the biaxial loading was measured to evaluate the stability of longwall chain pillars. Integrity factor, defined as the ratio of the total pillar strength to the total pillar load, is the criterion for stability. The total pillar load is derived directly from the in situ measurement of vertical pressures. The total pillar strength is derived from the situ measurement of horizontal pressures and the confined compressive strengths of pillar material as determined in laboratory tests. Horizontal and vertical pressures in the pillar were measured with the Bureau of Mines, U.S. Department of the Interior, hydraulic borehole pressure cells.
Publication Date
19860101
Document Type
OP;
Fiscal Year
1986
NTIS Accession No.
NTIS Price
Identifying No.
OP 38-86
NIOSH Division
DRC;
Source Name
Soc. Min. Eng. AIME, Littleton, Co, 1986, PP. 142-151
State
CO;
TOP