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The advance and relieve mining method: a horizontal stress control technique.

Authors
Chase-FE; Mark-C; Mucho-TP; Campbell-PL
Source
Proceedings of the 18th International Conference on Ground Control in Mining, August 2-5, 1999, Morgantown, West Virginia. Peng SS, Mark C, eds., Morgantown, WV: West Virginia University, 1999 Aug; :300-308
Link
NIOSHTIC No.
20027483
Abstract
Sacrificial entries, roof slotting, and other tactics have been used to combat high horizontal stresses during roadway development in U.S. coal mines. In Australia, the "pillar extraction on the advance" mining method has been successfully employed as a horizontal stress control technique. The concept of advancing and relieving mine workings, through pillar extraction developed from observations that some mines experience difficult ground conditions when advancing and retreating the first panel in a new reserve. However, conditions dramatically improve in subsequent panels. Apparently, the creation of a gob area stress relieves the adjacent panel workings. After much debate and close scrutiny, the first U.S. roof control plan to advance and relieve was approved in 1998, for the Sargent Hollow Mine in Wise County, VA. The major concern was that this mining practice places section personnel inby of the gob. The tentative approval permitted barrier pillar slabbing and removal of the adjacent development pillar during panel development. The intent of the plan was to provide a "stress shadow" for the advancing faces and outby workings to reduce the excessive number of roof falls. Sargent Hollow successfully extracted their first panel by pillaring on advance and retreat mining using posts. Mobile roof supports were employed to extract pillars while advancing the second panel. This paper summarizes Sargent Hollow Mine's experiences with the advance and relieve mining method.
Keywords
Mining-industry; Mine-workers; Miners; Accident-analysis; Accident-prevention; Control-technology; Safety-practices; Safety-research; Longwall-mining; Ground-control; Ground-stability; Room-and-pillar-mining; Underground-miners; Underground-mining
Publication Date
19990802
Document Type
Conference/Symposia Proceedings
Editors
Peng-SS; Mark-C
Fiscal Year
1999
NTIS Accession No.
NTIS Price
ISBN No.
0939084569
NIOSH Division
PRL
Source Name
Proceedings of the 18th International Conference on Ground Control in Mining, August 2-5, 1999, Morgantown, West Virginia
State
WV; PA; VA
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