Mine aerosol poses a serious health threat due to its easy access the human respiratory tract. Damage may be caused by chemical composition of dust and substances adsorbed on surface, including microorganisms that potentially affect health. Our proposed research aimed isolate Staphylococcus aureus strains from coal mine bioaerosol assess sensitivity towards selected antibiotics. Bioaerosol samples were collected in three underground hard mines located Upper Silesia southern Poland....

Abstract Initial chain tension in armoured face conveyors, which operating conditions vary constantly, should be adjusted automatically to adapt it the needs arising. The manufacturers of such conveyors are now offering a possibility equipping conveyor with drive telescopic trough enabling stepless change scraper contour by shifting frame. work presents outcomes computer investigations performed using an own mathematical model main and auxiliary equipped automatic initial adjustment system...

This paper deals with the automation of rock cutting process roadheaders used widely in civil engineering for drilling roadways underground mines and tunnels. Although there has been intensive technical development, are still manually controlled. Manual control does not allow optimizing values parameters, which often results low mining efficiency, especially case hard rocks, as well high energy consumption significant dynamic overloading roadheader. As part theoretical experimental research,...

The environment of underground hard coal mines, due to high humidity and temperature, combined with the presence organic substances very dust content, provides optimal conditions for growth development microorganisms, including pathogens. presented research was aimed at determining quantitative qualitative diversity air in mining excavations. Microbiological tests samples were carried out according standard microbiological techniques. study microbial communities made it possible determine...

Abstract The key working process carried out by roadheaders is rock mining. For this reason, the mathematical modelling of mining underlying prediction a dynamic load on main components roadheader, power demand for cutting with given properties or energy consumption process. theoretical and experimental investigations conducted point – especially in relation to technical parameters used these days underground their operating conditions that models employed date have many limitations, cases...

The robotised mounting of pickboxes at the working unit’s side surface a mining machine is comprised number sequential operations. such sequences often high and results from to be fitted (with up 90 for single unit). Each pickbox positioned individually as its location on arrangement in space described with different set data determined design phase unit. Hence, programmes controlling operation station are long complex. This article examines application computer tools process technology...

The article presents the outcomes of extensive computer investigations purpose which was to identify impact cutting heads’ rotational speed on load applied heads drive as well efficiency and energy consumption process. were performed based a simulation rock process within wide range rocks’ compressive strength with roadheader transverse head equipped 80 conical picks. Variations taken into consideration in variations factors connected properties drives driving condition system simulations...

The process of cutting rocks with a boom-type roadheader results in extreme dynamic loads and vibrations. Mining, especially the case hard rocks, is associated large energy consumption, which, when combined low efficiency, can lead to drilling performance. These phenomena are undesirable because excessive load leads machine durability, as well deterioration work conditions safety. Low mining efficiency affects economics works conducted using roadheaders. However, these adverse effects be...

Boom–type roadheaders are basic machines used in underground mines for drilling roadways, tunnelling and also making buildings using trenchless methods. The article presents selected results of tests carried out a semi–industrial scale, on roadheader R–130, concerning behaviour an innovative solution system automatic control boom–type cutting heads’ movements. This important innovation, not known before mining machines, is the software heads angular speed frequency converter. text shows...

For effective mining, it is essential to ensure that the picks are positioned correctly on working unit of a mining machine. This due fact design roadheader cutting heads/drums using computer-aided tools based operating conditions roadheader/shearer/milling The geometry head optimized for selected criteria by simulating process computer. reclaimed bodies utilized in production manufactured again overhaul process. Ensuring dimensions match rated labor-intensive and involves high costs....

Boom-type roadheaders are commonly used for excavation of roadways in underground mines, tunnels, and other architectural structures using trenchless techniques, as well sinking shafts occasionally excavating the harder soil softer formations cut cover construction. The main research development these machines is to offer solutions automatic control. This refers automation or robotization operation, raises possibility their eventual unmanned operation. article presents a roadheader simulator...

Vibrations of the roadheader cutting head were measured by means two methods during performed on test set-up created at Faculty Mining and Geology Silesian University Technology. The first them included installing accelerometers boom near heads. In second one, a photogrammetric kit was used, major components which high-speed cameras connected with TEMA Motion 3D software used for movement analysis. Based motion recorded in videos, trajectories delineated, their velocity acceleration...

Boom-type roadheaders are used for drilling underground roadways in mines and tunnels civil engineering. They allow mechanization of basic process operations, making up the that roadway type, i.e. rock cutting, output loading on means transport, removal from face roof support. The course cutting located a cross section drilled or tunnel is decisive efficiency resulting obtainable progress costs related to it. starting point robotisation type machines an efficient solution automatic control....

Abstract The efficiency of rock cutting with mining machines is largely determined by the arrangement picks, i.e. number and their on working unit machine. Not only correct selection pick system for given conditions at design stage important, but also ensuring compliance finished product. Strives, among others therefore, robotisation process manufacturing heads/drums. From point view holders welding process, it necessary to assess in real time position relative side surface head body. A...

Abstract Ensuring the compliance of finished product with project during manufacturing cutting heads/drums mining machines, largely determines efficiency rock mining, especially hard-to-cut rocks. The process these crucial elements machines is being robotized in order to ensure high accuracy and repeatability. This determines, among others need assess real-time degree approach pick holders positioned by industrial robot side surface working unit machine their target position. problem...

Shearers and roadheaders are commonly used to extract useful mineral deposits, especially hard coal, for drilling roadways in underground mines, tunnels other buildings civil engineering. As the primary working process of this type machines, mechanical mining rocks is carried out by cutting. These machines' units equipped purpose with picks, usually conical (point-attack). They have form an axially symmetrical body consisting a steel shaft tip made tungsten carbide, connected brass solder....