Evaluation of Present Shotcrete Technology for Improved Coal Mine Ground Control.
Bortz-SA; Aleshin-E; Wade-TB; Chugh-YP
NTIS: PB/222-872 Available for Reference At Bureau Libraries :205 pages
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.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/222-872; Available for Reference At Bureau Libraries
IIT Research Institute