Cenozoic world-class bauxite deposits developed on sedimentary sequences of the Parnaíba and Amazon Basins. The Décio pilot mine, excavated in Rondon do Pará deposit, exposes a 3 m thick bauxite-bearing lateritic profile top 350 high plateau. From base to top, this is composed clayey bauxite; porous microcrystalline spherulitic ferro-aluminous duricrust, fragmentary top; as well loose spherulit...

Abstract A number of destructive and non-destructive tests were conducted on rock samples collected from various zones in northern Iraq. So far, for Iraqi rocks, few studies have correlated Schmidt hammer rebound ( R ) with both unconfined compressive strength (UCS) Brazilian tensile (BTS). In this study, the objective is to develop a relationship between surface hardness (rebound number) BTS d...

Shallow subterranean habitats are among the last in Central Europe to be arachnologically researched. Using stratified pipe traps, we studied vertical distribution of spiders soil and interspaces bedrock (shallow habitats). Specifically, sampled fauna different substrates, including limestone, sandy marlstone, marl, claystone, loess, artificial gravel accumulation. Employing traps allowed us id...

PT Cipta Kridatama (CK) site Multi Harapan Utama (MHU) merupakan perusahaan kontraktor jasa pertambangan yang menerapkan metode peledakan pada aktifitas pengupasan lapisan overburden. Kegiatan geometri air deck bertujuan untuk menghemat penggunaan bahan peledak sehingga nilai powder factor juga turun. Serta mempercepat proses kegiatan tanpa menunggu waktu gassing dengan tetap menghasilkan fragm...

In the article problem of geotechnical application clay nd claystone as a base driven pile foundations has been considered. When using these foundations, compaction zone is formed in space around pile. The purpose this research to analyze influence zones on results analytical and numerical calculations for predicting settlement layered soils. following tasks were solved: 1) existing investigati...

The paper presents the numerical simulation of an underground excavation in Callovo-Oxfordian argillaceous formation, performed Meuse/Haute-Marne research laboratory, within context deep geological nuclear waste disposal. constitutive model adopted incorporates a number characteristic features hydromechanical behaviour claystone, and other indurated clays, including anisotropy time-dependent de...

Gunung Kidul Regency is a highland consisting of carbonate rocks dominantly. Bedoyo village in Ponjong sub district has lot dolines, but the summer season, dolines become dry and could not be water storage. Geological mapping included geomorphological, rock observation, structural also petrographical analysis laboratory. A Geophysics survey to observe subsurface distribution laterally verticall...