Field validation of estimated primary fragment size distributions in a block cave mine
نویسندگان
چکیده
منابع مشابه
A Hybrid Fuzzy MCDM Approach to Determine an Optimal Block Size in Open-Pit Mine Modeling: a Case Study
The computer-based 3D modeling of ore bodies is one of the most important steps in the resource estimation, grade determination, and production scheduling of open-pit mines. In the modeling phase, the volume of the orebody model is required to be filled by the blocks and sub-blocks. The determination of Block Size (BS) is important due to the dependence of the geostatistical issues and calculat...
متن کاملModeling Block Cave Subsidence at the Molycorp, Inc., Questa Mine— A Case Study
The evolution of surface subsidence is an important focus of study above Molycorp, Inc.’s newest block cave at the Questa molybdenum mine near Taos, New Mexico. The case study compares mature glory hole subsidence over the Goathill Orebody and subsidence emerging in its earliest stage over the new D Orebody block cave. Subsidence above the D Orebody was first detected in April 2003, 30 months a...
متن کاملSize-Constancy in the CAVE
The use of Virtual Environments (VE) for many research and commercial purposes relies on its ability to generate environments that faithfully reproduce the physical world. However, due to its limitations the VE can have a number of flaws that adversely affects its use and believability. One of the more important aspects of this problem is whether the size of an object in the VE is perceived as ...
متن کاملDoes divergence in female mate choice affect male size distributions in two cave fish populations?
Sexual selection by female choice can maintain male traits that are counter selected by natural selection. Alteration of the potential for sexual selection can thus lead to shifts in the expression of male traits. We investigated female mate choice for large male body size in a fish (Poecilia mexicana) that, besides surface streams, also inhabits two caves. All four populations investigated, ex...
متن کاملCrystalline Silica Analysis: A Comparison of Calibration Materials and Recent Coal Mine Dust Size Distributions
Since 1982 standard calibration materials recommended for respirable crystalline silica analysis by the Mine Safety and Health Administration (MSHA) P7 Infrared Method and the National Institute for Occupational Safety and Health (NIOSH) X-ray Diffraction (XRD) Analytical Method 7500 have undergone minor changes in size distribution. However, a critical assumption has been made that the crystal...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Southern African Institute of Mining and Metallurgy
سال: 2019
ISSN: 2225-6253,2411-9717
DOI: 10.17159/2411-9717/16/287/2019