Investigation of construction and parameters of the combined system for developing quartz slope deposit
The relevance of the work is in the issue of reducing losses in the bowels during development of vein No. 175 of the unique Kyshtym deposit of quartz, which is practically the only stable source of raw materials for innovative sectors of the economy. The applied chamber mining with the abandonment o...
| Main Authors: | , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Tomsk Polytechnic University
2017-11-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya.tpu.ru/archive/article/view/1942 |
| Summary: | The relevance of the work is in the issue of reducing losses in the bowels during development of vein No. 175 of the unique Kyshtym deposit of quartz, which is practically the only stable source of raw materials for innovative sectors of the economy. The applied chamber mining with the abandonment of ribbon pillars in the bowels provides a loss level of only 28 %, which is unacceptable for high-grade quartz. The use of bookmarked systems is unacceptable due to deterioration of the quality of quartz due to the entry of chemical impurities, and the systems with sub-floor caving because of great dilution and loss of ore. The technology aimed at reducing losses through the combination of development systems of various classes can solve the problem of increasing efficiency. The aim of the work is to substantiate the design and parameters of the combined mining system of slope field of medium capacity, providing the increase in the efficiency of underground technology and reducing losses of high-grade quartz in the subsoil. Research methods: a comprehensive research method, including analysis and generalization of the theory and experience in working out inclined ore bodies, economic and mathematical modeling of options and optimization of technology parameters, functional-factor regression with approximation of established dependencies of extraction parameters, technical and economic analysis of the experimental results. Results. The authors have systematized the variants of the combined mining system of slope deposits of medium capacity according to controllable factors that have the greatest effect on ore extraction parameters, form, condition and method of working out the interlock chamber, determined, respectively, by the stability of the hanging rocks, order of the extinguished chamber space. The authors developed the technique for determining extraction rates under a combined system for development of slope deposits of medium capacity, which takes into account the nature of the output of the interlocking ore under the cantilever arm and the caving rocks flowing from the adjacent block. The dependencies of extraction and efficiency of the combined development system on the thickness and angle of incidence of the ore body and on chamber width, which vary in the range of 4-20 m, 20-40 C and 18-26 m, respectively, were determined. Conclusions. The results of the study made it possible to determine the optimality of the variant of the combined mining system by forming a trapezoidal, mass collapse and ore release under the rock console through the bottom of the chamber. |
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| ISSN: | 2500-1019 2413-1830 |