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Protection of mechanized timberings on beds dangerous for mine impacts

Journal Article:

Abstract

In some stoping faces on beds which are dangerous for mine impacts, mechanized timbering is successfully used which is not equipped with protection from the effect of these dynamic phenomena. This generated the idea that in the indicated conditions, mechanized timbering may not be equipped with protective devices against dynamic loads. Theoretical studies have shown that the effects of mine impacts depends on the total energy of the impact, distance of this stoping face from the epicenter of the impact, as well as the capacity of the rock massif to transmit and absorb energy of the mine impact. This means that the effect of the mine impact under different conditions is not the same, the mine impacts of lower energy under definite conditions can result in greater damages to the mechanized timbering than mine impact with higher energy. It is believed that the effect of absorption of energy of the mine impact depends on the method of control of the roofing in the stoping face, the presence of hydraulic fill quarantees absorption of up to 80% of its energy. The experience of working beds which are dangerous for mine impacts in the upper Silesia coal basin indicated that the designs  More>>
Authors:
Publication Date:
Jan 01, 1982
Product Type:
Journal Article
Reference Number:
EDB-83-054968
Resource Relation:
Journal Name: Uhli; (Czechoslovakia); Journal Volume: 30:1
Subject:
01 COAL, LIGNITE, AND PEAT; POWERED SUPPORTS; DAMAGE; UNDERGROUND MINING; AUTOMATION; COAL MINING; CZECHOSLOVAKIA; SHIELDS; DEVELOPING COUNTRIES; EASTERN EUROPE; EUROPE; MECHANICAL STRUCTURES; MINING; SUPPORTS; 012000* - Coal, Lignite, & Peat- Mining
OSTI ID:
6591139
Country of Origin:
Serbia and Montenegro
Language:
Czech
Other Identifying Numbers:
Journal ID: CODEN: UHLIA
Submitting Site:
HEDB
Size:
Pages: 26-33
Announcement Date:

Journal Article:

Citation Formats

Budirsky, S. Protection of mechanized timberings on beds dangerous for mine impacts. Serbia and Montenegro: N. p., 1982. Web.
Budirsky, S. Protection of mechanized timberings on beds dangerous for mine impacts. Serbia and Montenegro.
Budirsky, S. 1982. "Protection of mechanized timberings on beds dangerous for mine impacts." Serbia and Montenegro.
@misc{etde_6591139,
title = {Protection of mechanized timberings on beds dangerous for mine impacts}
author = {Budirsky, S}
abstractNote = {In some stoping faces on beds which are dangerous for mine impacts, mechanized timbering is successfully used which is not equipped with protection from the effect of these dynamic phenomena. This generated the idea that in the indicated conditions, mechanized timbering may not be equipped with protective devices against dynamic loads. Theoretical studies have shown that the effects of mine impacts depends on the total energy of the impact, distance of this stoping face from the epicenter of the impact, as well as the capacity of the rock massif to transmit and absorb energy of the mine impact. This means that the effect of the mine impact under different conditions is not the same, the mine impacts of lower energy under definite conditions can result in greater damages to the mechanized timbering than mine impact with higher energy. It is believed that the effect of absorption of energy of the mine impact depends on the method of control of the roofing in the stoping face, the presence of hydraulic fill quarantees absorption of up to 80% of its energy. The experience of working beds which are dangerous for mine impacts in the upper Silesia coal basin indicated that the designs of the mechanized timbering, especially shield, in which the stands are not rigidly connected to the roof timber, during operation on beds with thickness 2.5-4 m withstand mine impacts with energy 10/sup 7/ J without significant disorders (mine impacts with this energy occur very frequently . For energy of mine impact of 108 J (impacts with this energy are observed comparatively rarely), the mechanized timberings are considerably damaged.}
journal = {Uhli; (Czechoslovakia)}
volume = {30:1}
journal type = {AC}
place = {Serbia and Montenegro}
year = {1982}
month = {Jan}
}