The surrounding rock control has been a difficult problem for fractured mass in hard mines. This article describes case study of the failure mechanisms and support design technology drifts Xinli Gold Mine. Based on field investigation, geology characteristics, types, influencing factors, their types were analyzed. classification, physical mechanical parameters obtained by using Q, RMR, GSI syst...

A comprehensive investigation was carried out to minimize the cost price of the rock fragmentation process including: drilling, blasting, secondary blasting and separating the large boulders (oversize rocks) while loading, until the optimized fragmentation, powder factor and ratio of burden (B) to blasthole diameter (?h) were achieved by doing several stages of drilling and blasting practically...

Reserch relaevance. Most ground movements are generally due to rock instability, this natural phenomenon poses a risk humanity. The properties of the mass directly influence type movement especially in underground structures. Research aim. Our goal is characterize and classify diatomite from sig mine using geomechanical classification systems such as RQD RMR order determine quality rocks Wester...

The in situ block size of the rock mass may be the single most important parameter influencing the stability and strength of some underground openings. Rock masses can often reasonably be characterized by a simple size-strength classification. The actual block size distribution is the product of the interaction between the joint orientation, spacing and persistence of that rock mass. Despite th...

A 132.70-m-high tower (above foundation) has been successfully completed at Tenerife Island. The foundation of the tower, a 2-mthick reinforced concrete slab, is supported by jointed, vesicular and weathered basalt, and scoria. A three-dimensional, elastic finite element program has permitted to calculate the displacements of the tower and the stresses in the slab. The installation of rod exten...