The article describes some aspects of the research and applied works, which authors carried out to expand scope application in study rock strength indicators laboratory KuzSTU (Prokopyevsk branch) on a complex equipment. It consists an extreme deformation chamber volumetric compression chamber. disadvantages have been eliminated by using special device for fixing sample when descending into als...

Keywords: Rockfill creep Particle mechanics method Water weakening Wetting–drying cycles Particle breakage Abrasion a b s t r a c t Rockfill is an important construction material for infrastructure engineering, such as dams, railways and airport foundations, which display a long-term post-construction settlement. However, the main mechanisms for rockfill creep and weathering influence still rem...

To verify the feasibility and efficiency of rotary-percussive drilling assisted by waterjets in very hard rocks, experiments on the Ž . performance of polycrystalline diamond compact PDC cutters resisting different combined loads of static thrust, impact, cutting and waterjets on Missouri red granite and Halston limestone were investigated. The experiments were conducted by means of a Ž . drop ...

Underground rock masses have shown a general trend of natural balance over billions of years of ground movement. Nonetheless, man-made underground constructions disturb this balance and cause rock stability failure. Fractured rock masses are frequently encountered in underground constructions, and this study aims to restore the strength of rock masses that have experienced considerable fracturi...

In the mining and civil engineering industries point-attack picks (conical picks) are extensively employed on mechanical excavators such as roadheaders, continuous miners and longwall shearers to cut relatively harder rocks/coals compared with radial picks. They are more durable than radial picks, and can economically cut intact rocks having up to around 120 MPa uniaxial compressive strength at...

Abstract Rock anchors are used to stabilise large scale infrastructures. Failure of rock could threaten the stability and lead severe economic social consequences. The design is based on four principal failure modes, which breakage steel tendon, tendon-grout interface failure, grout-rock mass around anchor. current dimensioning methods uncertain due limited knowledge bond strength failure. meth...

Abstract: The specific rate of breakage is one of the most important factors in evaluation of grinding process especially in ball mill. In this article the effect of ball size and feed size on selection function were investigated using batch grinding circuit on two-iron ore anomaly (B, C) from sangan mine in north of Iran. Eight different monosize fractions were prepared between 2000 and 50...