Mineralogy identification through linear unmixing of blast hole geochemistry

Drilling and blasting technology is one of the main methods for pressure relief in deep mining. The traditional method for blasting hole blockage with clay stemming has many problems, which include a large volume of transportation, excess loading time, and high labor intensity. An environmentally friendly blast hole plug was designed and developed. This method is cheap, closely blocks the hole, is quickly loaded, and is convenient for transportation. The impact test on the plug was carried out using an improved split Hopkinson pressure bar test system, and the industrial test was carried out in underground tunnel of coal mine. The tests results showed that, compared with clay stemming, the new method proposed in this paper could prolong the action time of the detonation gas, prevent premature detonation gas emissions, reduce the unit consumption of explosives, improve the utilization ratio, reduce the labor intensity of workers, and improve the effect of rock blasting with low cost of rock breaking.

Download Full-text

Linear unmixing for subsurface estimation on coastal shallow waters

8th International Conference of Pattern Recognition Systems (ICPRS 2017) ◽

10.1049/cp.2017.0168 ◽

2017 ◽

Author(s):

E. Carpena-Colón ◽

L.O. Jiménez-Rodríguez ◽

E. Arzuaga-Cruz

Keyword(s):

Shallow Waters ◽

Linear Unmixing

Download Full-text

The Dynamic Stress Characteristics of Air-Decked Bench Blasting under Soft Interlayer

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.101-102.400 ◽

2011 ◽

Vol 101-102 ◽

pp. 400-404

Author(s):

Liang Wu ◽

Dong Xiao Yu ◽

Wei Dong Duan

Keyword(s):

Dynamic Stress ◽

Near Field ◽

Blast Hole ◽

Material Model ◽

Explosion Energy ◽

Element Analysis ◽

Charge Structure ◽

Soft Interlayer ◽

Bench Blasting ◽

Project Construction

In modern mining and project construction, how to make use of the explosion energy effectively is the key technology demanding prompt solution at present. The application of air-decked blasting technology has enabled the efficient use of explosion energy, which proves that the air-decked blasting technology can overcome many disadvantages caused by column charge effectively, getting ideal explosion effect. Based on the dynamic finite element analysis software with the material model of Mat-Plastic-Kinemetic, the dynamic stress characteristics and failure mechanism of blast-hole near-field with level soft interlayer are researched with different air-decked charge structures. There is significant effect on the rock at the middle of blast-hole if top-air-decked charge structure with indirect initiation and middle-air-decked charge structure with two ends initiation at the same time. If bottom-air-decked charge structure with indirect initiation, soft inter-layer don’t change the peek of compression and tensile stress curves of typical elements with distance from the bottom of hole, so there is not effect significantly of level soft interlayer on bottom-air-decked charge structure with indirect initiation.

Download Full-text

Algoritmo de Descomposición Ciega Basado en el Modelo de Mezcla Multi-Lineal

10.24254/cnib.21.13 ◽

2021 ◽

Author(s):

◽

J. N. Mendoza Chavarría

Keyword(s):

State Of The Art ◽

Hyperspectral Data ◽

Spectral Unmixing ◽

Mixing Models ◽

Nonlinear Interactions ◽

Estimation Errors ◽

Spectral Signatures ◽

Scattering Effects ◽

Linear Unmixing ◽

Multiple Light Scattering

Spectral unmixing has proven to be a great tool for the analysis of hyperspectral data, with linear mixing models (LMMs) being the most used in the literature. Nevertheless, due to the limitations of the LMMs to accurately describe the multiple light scattering effects in multi and hyperspectral imaging, new mixing models have emerged to describe nonlinear interactions. In this paper, we propose a new nonlinear unmixing algorithm based on a multilinear mixture model called Non-linear Extended Blind Endmember and Abundance Extraction (NEBEAE), which is based on a linear unmixing method established in the literature. The results of this study show that proposed method decreases the estimation errors of the spectral signatures and abundance maps, as well as the execution time with respect the state of the art methods.

Download Full-text