NIOSHTIC-2 Publications Search

Preliminary predictive model of subsidence process over room and pillar workings. Phase I: definition of factors.

Authors
Mathur SK; Mikkilineni MR
Source
NTIS: PB/83-191759, 1982; :1-113
NIOSHTIC No.
10002844
Abstract
The report identifies all the possible activities, variables, and factors that contribute to the surface subsidence process over room- and-pillar workings. These factors are responsible for mine instability and collapse that ultimately transforms into surface subsidence. Such a failure mechanism is initiated by the failure of the mine floor bed and/or the failure of the pillars or the failure of the roof after second mining, which eventually brings down the roof. The individual responses of the pillar, floor, and roof rocks to the mining-induced stresses and the complex interaction between these components cannot be attributable to any single factor. Also, no attempt has been made to quantify the significance of each of these factors and relate to the ground subsidence due to the lack of field data. The discussion here is centered primarily on the first mining, although second mining is mentioned very briefly.
Keywords
Room and pillar mining; Mining; Underground mines; Subsidence; Structural analysis; Structural failure; Roof falls; Environmental stress; Failure analysis
Publication Date
19820101
Document Type
CP; Final Contract Report
Funding Type
Contract
Fiscal Year
1982
NTIS Accession No.
PB83-191759
NTIS Price
A07
Identifying No.
OFR 68-83
NIOSH Division
PRC
Source Name
NTIS: PB/83-191759
State
PA
Performing Organization
Mrm Engineers
Page last reviewed: February 11, 2022
Content source: National Institute for Occupational Safety and Health Education and Information Division