Abstract
The aim of the research is to assess the possibility of using the energy-dispersive X-ray fluorescence method directly at the stoping operation site. To meet this objective, a hand-held X-ray fluorescence spectrometer of the expert class of the NITON XL2 brand was selected. This will solve the problem of developing an express method for assessing the explosive and fire-hazardous properties of sulfur-containing or pyrite-containing ore. The development of the method is dictated by the need for operational control of the dust explosion hazard of sulfur-containing rocks and the assessment of their tendency to spontaneous combustion and also the possibility of making amendments to the development process of complex heterogeneous host rocks. Visual and optical control methods were used as an auxiliary method. In the process of developing the express method, both express analyses were carried out directly at the face bottom, and monolithic large-sized pieces of mined rock mass and also additional laboratory studies of previously studied samples of these rocks dispersed to a size of less than 100 microns were performed. The obtained results allowed to draw a number of conclusions about the expediency of using the X-ray fluorescence express method and suggest ways to use it directly in the stoping face.
Highlights
Changing geological, mining and climatic conditions for the mined and prospective fields development, the complexity of the geomechanical situation, the increase in production, the use of innovative technologies for tunneling and drilling and blasting operations, the increasing need for mining polymetallic raw materials dictate the need to improve the existing rules and regulations governing industrial safety issues [1, 2, 3]
The main method that we propose to use as an express method for determining elements, in this case, sulfur and arsenic, is the method of X-ray fluorescence analysis
The X-ray fluorescence analysis (XRF) method is unique in its capabilities, belongs to the group of express methods, is highly accurate, informative, and has good reproducibility of results
Summary
Changing geological, mining and climatic conditions for the mined and prospective fields development, the complexity of the geomechanical situation, the increase in production, the use of innovative technologies for tunneling and drilling and blasting operations, the increasing need for mining polymetallic raw materials dictate the need to improve the existing rules and regulations governing industrial safety issues [1, 2, 3]. Due to the fact that a number of works provide information on multiple spontaneous combustion and dust explosions in mine workings, and the above discrepancies on the dangerous threshold of sulfur content in the rocks containing the ore body, we consider it necessary to have regulatory requirements or recommendations for the use as a preventive measure of assessing the danger of polymetallic rocks mining including sulfur and sulfur-containing minerals for the widespread implementation of express methods for assessing the sulfur content in the rock mass [15,16,17,18,19]. Modern applied material and technical support makes it possible to implement the application of this method directly at the underground ore mining site [14, 20]
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