Dear Citizens once again my sincere greetings to you all. Beloved Citizens, the fight against illegal mining which is a thorny political problem that divides the nation has led to a misjudgment on a pact between the Ghana Chamber of Mines and the Ghana Army on the insertion of Military personnel in the location of Mining Companies.
The lump-grout (LG) material consisted of coarse lumps and pumpable grout has been developed as an alternative infill material to cementitious grout (CG) material in secondary standing support for underground mines. This paper aims to further explore the compressive behaviour of the LG material under variable lateral confinements. A total of 30 LG specimens and 15 CG specimens, either under the active confinement via a Hoek cell or the passive confinement with a fibre-reinforced polymer (FRP) jacket, were prepared and tested. The main test variables included the confining pressure (i.e., 0, 2, 4, 6, 8, 12, 16 MPa) applied by a Hoek cell and the FRP jackets made of variable FRP composites (i.e., CFRP, GFRP and UHMWPE FRP). Test results demonstrated that both the compressive strength and the axial deformation of the LG material were obviously enhanced attributed to effective lateral confinement. The stress path independence assumption was also verified from this research, which provided
Hindustan Zinc's Zawar Group of Mines host one day Technical Workshop on Ground control of Underground mines udaipurkiran.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from udaipurkiran.com Daily Mail and Mail on Sunday newspapers.
The hybrid structural form made of the polyvinyl chloride (PVC) and lump-grout (LG) material, termed LGFPT column, was developed as the alternative standing support for deep underground mines. To explore the mechanical response of this structural form under the uniaxial compression, various critical parameters (i.e., the water-to-powder ratio of the cementitious grout material, length-to-diameter ratio of the PVC tube, loading mode and loading speed) were investigated. Test results showed that the LGFPT column had an excellent ductility (>30% of the column length) associated with the strain hardening behaviour. Compared to its counterparts, the effect of the water-to-powder ratio of the grout material is most significant when the peak load of the LGFPT is evaluated. In parallel, the compressive behaviour of the cementitious grout material-filled PVC tubular (GFPT) column was investigated. When the ultimate axial compressive strength of the LGFPT and the GFPT are compared, the streng
Coal India's OB To M-Sand Initiative: A Win-Win For The Environment And Construction Industry swarajyamag.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from swarajyamag.com Daily Mail and Mail on Sunday newspapers.