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KOMAG Institute of Mining Technology, Poland
Camborne School of Mines, University of Exeter, Penryn, UK
KOMAG Institute of Mining Technology, Poland

Effectiveness of half masks for respiratory
health protection in coal mining

p. 2-17

An improved procedure is presented for testing the level of respiratory health protection and comfort of half masks currently used in coal mining and similar industries. This will allow companies to make the best choice of such equipment for their workers. Half masks used by one Slovenian (PV) and two Polish (JSW and PPG) coal mining companies were tested in terms of filtering efficiency, especially for PM2.5, perceived effectiveness, comfort and ease of use.
Filtering efficiency was determined by analysing filters from masks used in underground operations for the levels and sizes of trapped coal dust particles and by carrying out experiments employing a specially developed laboratory test stand. The latter incorporated a replica human head and a climatic chamber to simulate the humidity of exhaled air during mining activities. To determine the comfort and utility of the half masks, selected miners were asked to fill in questionnaires.
The main results of these studies were that, in the interest of miners' health, and for those working in other high dust environments, the quality of the half-mask should be assessed on the basis of workplace and stand tests. These are complementary and both should be included to ensure the correct assessment of the half masks. For the masks supplied by the mentioned mining companies, their filtering efficiency for PM2.5, as determined using the test stand, was excellent at over 99%.

Keywords: RPE equipment, PM2.5, half masks, testing stand 


Rafał BARON , Yurii MOSORA

KOMAG Institute of Mining Technology, Poland
Ivano-Frankivsk National Technical University of Oil and Gas,
Ivano-Frankivsk, Ivano-Frankivsk Oblast, Ukraina,

Assessment of rare earth elements content in the material
from mine heaps

p. 18-27

The paper contains the results of laboratory tests aimed at determination of rare earth elements (REE) in mine wastes The material for testing was collected from mine heaps located in Lower Silesian Coal Basin (LSCB). Laboratory analyses of the material of different granulation (coal mud and the material of coarser granulation) were conducted with use of inductively coupled plasma mass spectrometry (ICP-MS) method. The tests were an extension of the scope of the projects aimed at searching for valuable elements in waste material from hard coal mining realized at the KOMAG Institute of Mining Technology. Basing on the results of laboratory analyses, the economic viability of the recovery of valuable elements from the mine wastes was formulated.

Keywords: rare earth elements (REE), mine wastes, Lower Silesian Coal Basin.



KOMAG Institute of Mining Technology, Poland
Department of Mining and Nuclear Engineering,
Missouri University of Science and Technology, USA

The concept of a screw conveyor for the vertical transport of
bulk materials

p. 28-33

Screw feeders and conveyors are mainly used in the following industries: minerals, agriculture, chemistry, pharmaceutical, pigments, plastics, cement, sand and food processing for transporting and mixing the granular materials. The article presents a synthetic analysis of the conveyors used in the collection and transport systems of loose materials. It focusess on the solutions based on a srew shaft operating vertically or at an angle.
A concept of a screw conveyor intended for vertical transport of loose materials is presented. Due to structure and transport properties, the conveyor can replace the oversized bucket conveyor, currently used in one of the industrial plants. A 3D model was developed, illustrating the manufacturing method and introducing the principle of the conveyor operation.

Keywords: power industry, vertical transport, screw conveyor


Romana ZAJĄC, Pavol BOŽEK

KOMAG Institute of Mining Technology, Poland
Slovak University of Technology, Slovakia

Risk Management at the Notified Body
in the Aspect of Its Impartiality

p. 34-44

State-of-the art management systems are oriented onto supporting a competiveness of organizations and a continuous quality improvement of products, services and processes.
One of essential elements of management is the risk management process which enables to manage uncertainty and risk in relation to the conducted activity by an organization.
Managing risk assists organizations in setting strategy, achieving objectives and making informed decisions. Managing risk is part of governance and leadership, and is fundamental to how the organization is managed at all levels. It contributes to the improvement of management systems. A competent use of risk management mechanisms enables each organization to use its potential to a full extent and undertake proper decisions.
The issues concerning a standardization of requirements in the case of standards from the management scope; in particular from the point of view of issues connected with risk management, are presented in the first part of the article.
A model of the process, oriented onto a risk in the quality management system which enables to conduct managing activities in the situation of uncertainty and to take decisions oriented onto preventing mistakes in managing the organization and onto ensuring the appropriate quality, is described.
The subject – matter concerning risk analysis, in particular from the point of view of meeting the EA Guidelines, concerning horizontal requirements related to the bodies assessing the conformity for notification purposes, is brought nearer.
The most essential requirements, which must be met by such a body to guarantee a competent and impartial process of the product assessment, are described.
In the following chapters the basic elements of the risk analysis process are discussed and an exemplary description of the risk assessment methodology is presented.

Keywords: quality management system, notified body, process approach, risk analysis



AGH University of Science and Technology, Poland
Department of Civil Engineering, University of Engineering and Technology Peshawar, Pakistan

LabVIEW based software for verification of the new idea of
lining for mine shafts located in salt rock mass

p. 45-57

High values of salt rock mass convergence might cause serious problems with maintenance of shaft lining located in salt rock sections. The most efficient existing method of negative convergence influence prevention is periodic removal of creeping salt from shaft walls. However, the process of salt removal is problematic in terms of shaft and hoisting system typical operation. A new shaft lining idea allows removal of creeping salt by leaching without the need for stopping the shaft operation. Following paper presents a software, developed in LabVIEW environment and applied in the framework of test facility, designed for purpose of verification of theoretical assumptions of new construction of shaft lining. Developed software consists of applications for data acquisition, based on Event-Driven Queued State Machine pattern, and data processing, designed as Producer-Consumer pattern.

Keywords: : shaft lining, software for mining engineering, salt mine, mine shaft, LabVIEW, data acquisition, data processing, Event-Driven Queued State Machine



FAMUR S.A.,Poland

Longwall shearer haulage systems – a historical review.
Part 3 – Chainless haulage systems with drive wheel and rack bar

p. 58-69

Chainless shearer haulage systems with rack bar are currently the most popular group of this kind of solution. The first type of rack bar was captivated chain. In 70-ties great number of different solution of chainless haulage systems with drive wheel (sprocket or pin) and different rack bars were implemented. Afterwords some of them were abandoned for different reasons, but some are still in duty and under improvement. This article is the third and the last part of shearer haulage systems technical review, concentrated on chainless haulage system. Beginning from the british Rollrack with pin drive wheel and toothed rack bar through similar solutions with sprocket drive wheel in Europe and China and solutions with vertical or horizontal ladder type of rack bar is reflect technical development of shearer haulage system till contemporary solutions and trials of improvement.

Keywords:longwall mining, longwall system, coal cutter-loader, coal shearer, shearer haulage system, cordless haulage systems, chainless haulage systems