You need JavaScript to view this

Effects of increased rock strata stresses on coal gettability

Abstract

Analyzes effects of rock strata pressure on a coal seam, its cracking and on energy consumption of coal cutting by shearer loaders and coal plows. Effects of mining depth on stresses in a coal seam rib side were analyzed using formulae developed by Budryk, Chudek and Borecki. Formulae used for selecting optimum yield strength of powered supports at working faces are reviewed. Four types of spontaneous separation of coal seam blocks caused by rock strata stresses are evaluated: layers parallel to the face with constant thickness, coal blocks with thickness decreasing in the direction of the floor or roof (blocks with a planar triangle cross-cut), blocks situated in the seam layer adjacent to the floor or roof. Causes of each type of coal seam separation are analyzed. 9 refs.
Authors:
Sikora, W; Skoczynski, W [1] 
  1. Politechnika Slaska, Gliwice (Poland). Instytut Mechanizacji Gornictwa
Publication Date:
Jan 01, 1988
Product Type:
Conference
Report Number:
CONF-880002-
Reference Number:
CLA-90-060855; EDB-90-083960
Resource Relation:
Journal Name: Zeszyty Naukowe Politechniki Slaskiej, Gornictwo; (Poland); Journal Volume: 145; Conference: 3. symposium - selected problems of rock strata mechanics and mine construction at large depths, Katowice (Poland), 1988
Subject:
01 COAL, LIGNITE, AND PEAT; COAL SEAMS; CUTTING; POWERED SUPPORTS; YIELD STRENGTH; COAL MINES; COAL MINING; DEPTH; ENERGY CONSUMPTION; FRACTURES; LONGWALL MINING; OPTIMIZATION; ROCK MECHANICS; STRESSES; WORKING FACES; COAL DEPOSITS; DIMENSIONS; FAILURES; GEOLOGIC DEPOSITS; MACHINING; MECHANICAL PROPERTIES; MECHANICAL STRUCTURES; MECHANICS; MINERAL RESOURCES; MINES; MINING; RESOURCES; SUPPORTS; UNDERGROUND FACILITIES; UNDERGROUND MINING; 012031* - Coal, Lignite, & Peat- Underground Mining- Strata Mechanics & Control- (1987-); 012030 - Coal, Lignite, & Peat- Underground Mining- (1987-)
OSTI ID:
6936774
Country of Origin:
Poland
Language:
Polish
Other Identifying Numbers:
Journal ID: ISSN 0372-9508; CODEN: ZNSGA
Submitting Site:
CLA
Size:
Pages: 319-328
Announcement Date:

Citation Formats

Sikora, W, and Skoczynski, W. Effects of increased rock strata stresses on coal gettability. Poland: N. p., 1988. Web.
Sikora, W, & Skoczynski, W. Effects of increased rock strata stresses on coal gettability. Poland.
Sikora, W, and Skoczynski, W. 1988. "Effects of increased rock strata stresses on coal gettability." Poland.
@misc{etde_6936774,
title = {Effects of increased rock strata stresses on coal gettability}
author = {Sikora, W, and Skoczynski, W}
abstractNote = {Analyzes effects of rock strata pressure on a coal seam, its cracking and on energy consumption of coal cutting by shearer loaders and coal plows. Effects of mining depth on stresses in a coal seam rib side were analyzed using formulae developed by Budryk, Chudek and Borecki. Formulae used for selecting optimum yield strength of powered supports at working faces are reviewed. Four types of spontaneous separation of coal seam blocks caused by rock strata stresses are evaluated: layers parallel to the face with constant thickness, coal blocks with thickness decreasing in the direction of the floor or roof (blocks with a planar triangle cross-cut), blocks situated in the seam layer adjacent to the floor or roof. Causes of each type of coal seam separation are analyzed. 9 refs.}
journal = {Zeszyty Naukowe Politechniki Slaskiej, Gornictwo; (Poland)}
volume = {145}
place = {Poland}
year = {1988}
month = {Jan}
}