The purpose of this paper is to provide scientific basis for the stability evaluation overburden rock repeated mining goaf under expressway. objectives present study are reveal development fractures and identify fractal characteristics fractures. results show that (1) separation fracture vertical fissure developed in mining; (2) after lower coal seam, obviously retained general. number on both ...

This article discusses the use of belt conveyors for transporting overburden from open pits. The main technical and economic parameters powerful that operate as part a cyclic-flow technology development transportation rocks are given. conclusions on effective further rocky

Microbiological analysis of overburden samples collected from chromite mining areas of Orissa, India revealed that they are rich in microbial density as well as diversity and dominated by Gram-negative (58%) bacteria. The phenotypically distinguishable bacterial isolates (130) showed wide degree of tolerance to chromium (2-8 mM) when tested in peptone yeast extract glucose agar medium. Isolates...

The distribution, scale, and engineering geological characteristics of riverbed overburden have become one the key issues in construction water conservancy hydropower projects southwest China. In this study, we summarize discuss (variation thickness) distribution geogenic (formation) mechanisms associated rivers. This was done by compiling thickness data from constructed planned dams. results s...

Surface subsidence in coal mine areas can cause serious geological hazards. After a seam is mined, the overlying rock layers fracture, collapse, and expand; fractured bulking masses are then continuously compacted under action of overburden load, which eventually leads to surface subsidence. Overburden isolated grout filling via boreholes, high-pressure grouting mining-induced fissures hard lay...

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...

OBJECTIVE To determine the frequency of anxiety and depression among medical students of Wah Medical College and their associations with sociodemographic and educational characteristics if any. STUDY DESIGN Cross-sectional survey. PLACE AND DURATION OF STUDY Wah Medical College, from September 2007 to March 2008. METHODOLOGY A sample of 279 students was included in the study after excludi...