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Mining the 510 coal seam prone to rock bursts and below a coal support pillar in a seam above

Journal Article:

Abstract

The 510 coal seam, situated at a depth of 760 m below a support pillar left in an overlying coal seam, was mined by a system of longwall faces from 1979 to 1982. The seam was prone to rock bursts. Energy of rock bursts which occurred in the mine ranged from 10/SUP/5 to 10/SUP/6 J. The coal seam, 10 m thick, was mined by slicing. Faces were 140 m long. Stress concentrations caused by the suppport pillar left in the overlying coal seam were calculated. Curves which describe stress fluctuations were plotted. Rock burst hazards were determined by drilling. Drilling intervals depended on hazard degree and position of the test site in relation to the support pillar in the overlying coal seam. The face was 3 m high. Supports used in 2 gate roads were reinforced by steel and timber supports. Strong timber boards were placed at canopies of powered supports used at the working face. The face was situated at an angle of 10 degrees to the pillar axis. In the zone of critical stresses water infusion and shock blasting were used for rock burst prevention. These methods, plus reinforcement of the supports in gate roads and at the  More>>
Authors:
Publication Date:
Oct 01, 1983
Product Type:
Journal Article
Reference Number:
EDB-84-104811
Resource Relation:
Journal Name: Przegl. Gorn.; (Poland); Journal Volume: 39:10
Subject:
01 COAL, LIGNITE, AND PEAT; MINE ROADWAYS; SUPPORTS; ROCK BURSTS; INHIBITION; SLICE MINING; POWERED SUPPORTS; SUPPORT PILLARS; COAL MINING; COAL SEAMS; DISTRIBUTION; EXPLOSIVE FRACTURING; FLUID INJECTION; FORECASTING; LONGWALL MINING; POLAND; SAFETY; SAFETY ENGINEERING; STRATA CONTROL; STRESSES; THICKNESS; UNDERGROUND MINING; WATER; COAL DEPOSITS; COMMINUTION; DEVELOPING COUNTRIES; DIMENSIONS; EASTERN EUROPE; ENGINEERING; EUROPE; FRACTURING; GEOLOGIC DEPOSITS; HYDROGEN COMPOUNDS; MECHANICAL STRUCTURES; MINERAL RESOURCES; MINING; OXYGEN COMPOUNDS; RESOURCES; TUNNELS; UNDERGROUND FACILITIES; 012000* - Coal, Lignite, & Peat- Mining
OSTI ID:
6929621
Country of Origin:
Poland
Language:
Polish
Other Identifying Numbers:
Journal ID: CODEN: PRGOA
Submitting Site:
HEDB
Size:
Pages: 398-401
Announcement Date:

Journal Article:

Citation Formats

Major, M, and Gebala, W. Mining the 510 coal seam prone to rock bursts and below a coal support pillar in a seam above. Poland: N. p., 1983. Web.
Major, M, & Gebala, W. Mining the 510 coal seam prone to rock bursts and below a coal support pillar in a seam above. Poland.
Major, M, and Gebala, W. 1983. "Mining the 510 coal seam prone to rock bursts and below a coal support pillar in a seam above." Poland.
@misc{etde_6929621,
title = {Mining the 510 coal seam prone to rock bursts and below a coal support pillar in a seam above}
author = {Major, M, and Gebala, W}
abstractNote = {The 510 coal seam, situated at a depth of 760 m below a support pillar left in an overlying coal seam, was mined by a system of longwall faces from 1979 to 1982. The seam was prone to rock bursts. Energy of rock bursts which occurred in the mine ranged from 10/SUP/5 to 10/SUP/6 J. The coal seam, 10 m thick, was mined by slicing. Faces were 140 m long. Stress concentrations caused by the suppport pillar left in the overlying coal seam were calculated. Curves which describe stress fluctuations were plotted. Rock burst hazards were determined by drilling. Drilling intervals depended on hazard degree and position of the test site in relation to the support pillar in the overlying coal seam. The face was 3 m high. Supports used in 2 gate roads were reinforced by steel and timber supports. Strong timber boards were placed at canopies of powered supports used at the working face. The face was situated at an angle of 10 degrees to the pillar axis. In the zone of critical stresses water infusion and shock blasting were used for rock burst prevention. These methods, plus reinforcement of the supports in gate roads and at the working face, guaranteed safe mining and prevented rock bursts. (8 refs.)}
journal = {Przegl. Gorn.; (Poland)}
volume = {39:10}
journal type = {AC}
place = {Poland}
year = {1983}
month = {Oct}
}