Influence of technological parameters of compensation chambers on its stability and quality of extracted ore

M. Stupnik M. Fedko M. Hryshchenko O. Kalinichenko V. Kalinichenko S. Pysmennyi
Received 01.01.2023, Revised 04.03.2023, Accepted 25.04.2023
Abstract

Purpose. A theoretical substantiation of the optimal shapes and sizes of compensation chambers, determination of their stability and influence on the quality of the mined ore mass. Ukraine occupies a leading position in the world in the production of iron ore. The vast majority of rich steel ores are mined underground. It has been established that with an increase in the depth of development, the productivity of mines decreases, and the quality of the mined ore mass deteriorates. The prerequisite is the deterioration of the mining and geological conditions of the development of deposits. The extraction of rich iron ores is characterized by significant losses and clogging of the ore, reaching, in some cases, 14-20% and 12-18%, respectively. These loss indicators are a consequence of the fact that the work is carried out with outdated equipment and technologies. In this work, improved forms of compensation chambers are investigated and proposed, which allow increasing the volume of compensation space, obtaining purer ore and improving the quality of the extracted raw materials. Research methods. Functional analysis of the requirements of the world metallurgical industry for the quality of iron ore underground mining in the mines of Ukraine. Modeling of a rock mass by the end element method (FEM) using the specialized computer program Ansis 2021-P2. Scientific novelty. New dependences of the influence of the shape of compensation chambers on their stability, technological parameters and quality of the mined ore have been established. Practical significance. The use of highly stable compensation chambers will increase their volume, which increases the amount of seized pure ore, reduce its clogging and achieve an increase in the quality of the mined ore mass, which will have a positive effect on increasing its price and competitiveness of marketable products. Results. It has been proven that the vertical compensation chamber of a trapezoidal shape has the highest resistance, which will be stable in the range of all considered depths (1400-2000 m) even in ores of low strength and stability. Vertical compensation chambers and vaulted chambers have somewhat less stability, where fallouts of varying intensity will take place in the lower part of outcrops in low-strength ores at depths of more than 1750 m

Keywords:
iron ore; underground mining; compensation chambers; stress-strain state; stability; quality

Retrieved from Vol. 21, No. 1, 2023

Pages 3–7

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Stupnik, M., Fedko, M., Hryshchenko, M., Kalinichenko, O., Kalinichenko, V., & Pysmennyi, S. (2023). Influence of technological parameters of compensation chambers on its stability and quality of extracted ore. Journal of Kryvyi Rih National University, 21(1), 3-7. https://doi.org/10.31721/2306-5451-2023-1-56-3-8
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