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Evaluation of Present Shotcrete Technology for Improved Coal Mine Ground Control.

Authors
Bortz-SA; Aleshin-E; Wade-TB; Chugh-YP
Source
NTIS: PB/222-872 Available for Reference At Bureau Libraries :205 pages
Link
NIOSHTIC No.
10001003
Abstract
This report presents the results of an extensive laboratory testing program to determine the physical properties of shotcrete including the use of fast-set agents, controlled set cements, and both wet and dry shotcreting equipment. Shotcrete was placed under simulated field conditions using the dry and wet processes. Mechanical properties obtained for accelerated and nonaccelerated shotcretes include compressive, flexural, and shear strength; elastic modulus and poisson's ratio; and shear and tensile properties of shotcrete bonded to coal, sandstone, and shale. Physical properties measured were unit weight and permeability to methane gas. The data show that rapid setting shotcrete has the potential for improved coal mine ground control. There is no clear evidence that either wet or dry process shotcrete is superior to the other.
Publication Date
19730101
Document Type
CP; Final Contract Report;
Fiscal Year
1973
NTIS Accession No.
PB-222872
NTIS Price
A11
Identifying No.
OFR 54-73
NIOSH Division
SRC;
Source Name
NTIS: PB/222-872; Available for Reference At Bureau Libraries
Performing Organization
IIT Research Institute
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