Geotekhnologia Science and Technology Center, Chelyabinsk, Russia:
V. A. Pikalov, Head of Department, Doctor of Engineering Sciences, pikalov@ustup.ru
A. V. Sokolovskiy, Chairman of Board of Directors, Doctor of Engineering Sciences, avs@ustup.ru

Innovative Mining Technologies, Kemerovo, Russia:
A. G. Netsvetaev, Head of Research Project on Manless Coal Mining in Russia, Doctor of Engineering Sciences
D. I. Pruzhina, Chief Executive Officer

The motive for the study lies in the fact that mines increasingly have to use new deposits either possessing small reserves mineable within a short period, or undergrade mineral resources. Efficient mining in this case drastically depends on sound subsoil management, maximum extraction of available mineral reserves and minimum loss of mineral in mining and processing. A higher quality coal production in aggravating ground conditions is ensured by combination of geotechnologies, a special case of which is the technology based on complete coal extraction package (CCEP). The application of this technology ensures increased coal production with optimum economic indices in complicated conditions and enables coal extraction from walls of open pits and from pillars in underground mines. The article defines ranges of efficient application of coal mining with open pit and underground methods, and with CCEP technology. It is found which geological, technological and organizational factors allow reaching high CCEP capacity as a key non-economic index of the technology application. Such factors are: amount of mineable coal reserves, number of coal beds; thickness, quality, persistence and jointing of beds and partings; dip angles of coal beds; presence and thickness of dirt bands; physicomechanical properties of coal bed roof and enclosing rocks; angle and stability of open pit slope; work face and length of CCEP excavations, water content. The authors give methodical guidelines on expert appraisal of sections in coal mines to be subjected to mining with the complete coal extraction package. The attractiveness of a section is evaluated by experts in terms of each characteristic of the section and based on the determinant factor of CCEP inefficiency risk. Arrangements against negative events for CCEP operation are set up.

1. Kazikaev D. M. Kombinirovannaya razrabotka rudnykh mestorozhdeniy (Combined mining of ore deposits). Moscow : Gornaya kniga, 2008. 360 p.
2. Kaplunov D. R., Rylnikova M. V. Kombinirovannaya razrabotka rudnykh mestorozhdeniy (Combined mining of ore deposits). Moscow : Gornaya kniga, 2012. 344 p.
3. Coal Production and Processing Technology. Editors: M. R. Riazi, Rajender Gupta. Taylor&Francis Group, LLC, 2016. p. 535.
4. Sastry V. R., Ram Chandar K. Stability analysis of highwall — case study of an opencast coal mining project. Mining Engineering Journal. 2010. Vol. 12, No. 4. pp. 18–24.
5. Dixit S. K., Pradhan M. Highwall mining in India. Mine Planning and Equipment Selection. Springer International Publishing, 2014. pp. 175–187.
6. Prakash A., John L. P., Pal R. P. Highwall mining in India. Part II. Subsidence management mechanism at mine level. Journal of Mines, Metals & Fuels. 2014. Vol. 62, No. 9–10. pp. 254–262.
7. Shen B. et al. Highwall mining stability. Taishan Academic Forum. Project on Mine Disaster Prevention and Control. Atlantis Press, 2014.
8. Grigoryan A. A. Tipizatsiya gorno-geologicheskikh i tekhnologicheskikh usloviy dlya primeneniya kompleksov glubokoy razrabotki plastov (na primere plasta «Kyrgayskiy 63» Sokolovskogo mestorozhdeniya) (Typifi cation of mining-geological and technological conditions for application of deep bed mining complexes (on example of «Kyrgayskiy 63» bed (Sokolovskoe deposit))). Ugol = Russian Coal Journal. 2014. No. 8. pp. 66–69.
9. Grigoryan A. A. Teoreticheskoe obosnovanie parametrov tekhnologii bezlyudnoy dobychi uglya i ikh promyshlennaya aprobatsiya na ugolnom predpriyatii (Theoretical substantiation of parameters of unmanned coal extraction technology and their industrial aprobation at coal enterprise). Ugol = Russian Coal Journal. 2014. No. 9. pp. 26–29.
10. Netsvetaev A. G., Grigoryan A. A., Pruzhina D. I. Geodinamika krovli plasta 67 Taldinskogo mestorozhdeniya pri otrabotke ego kompleksom glubokoy razrabotki plastov (Geodynamics of 67 bed top (Taldinskoe deposit) during its stoping by the complex of deep mining of beds). Ugol = Russian Coal Journal. 2014. No. 11. pp. 85–89.
11. Agafonova A. B., Agafonov V. V., Mikheeva A. B. Sistematizatsiya alternativnykh elementov traditsionnykh tekhnologiy podgotovki i otrabotki vyemochnykh poley, adaptivnykh k usloviyam glubokikh shakht (Systematization of alternative elements of traditional technologies of preparation and stoping of mine sections, adaptive to deep mine conditions). Gornyy informatsionno-analiticheskiy byulleten = Mining Informational and Analytical Bulletin. 2010. No. 5. pp. 278–281.
12. Netsvetaev A. G., Grigoryan A. A., Pruzhina D. I. Raschetnye i fakticheskie parametry tekhnologii s primeneniem kompleksov glubokoy razrabotki plastov dlya otrabotki plasta Kyrgayskiy 63 na razreze «Kuprinskiy» (Calculation and actual technology parameters with application of deep bed mining complexes for Kyrgayskiy 63 bed stoping on the «Kuprinskiy» strip mine). Gornaya promyshlennost = Mining industry. 2014. No. 5. pp. 12–14.
13. Chandar K. R., Kumar B. G. Effect of width of gallery of highwall mining on stability of highwall: a numerical modelling approach. International Journal of Mining and Mineral Engineering. 2014. Vol. 5, No. 3. pp. 212–228.
14. Chandar K. R. et al. Classifi cation of Stability of Highwall During Highwall Mining: A Statistical Adaptive Learning Approach. Geotechnical and Geological Engineering. 2015. Vol. 33, No. 3. pp. 511–521.
15. Kortelev O. B., Cheskidov V. I., Norri V. K. Effect of highwall parameters on the open pit operation and limits. Journal of Mining Science. 2011. Vol. 47, No. 5. pp. 587–592.
16. Perry K. A., Raffaldi M. J., Harris K. W. Influence of highwall mining progression on web and barrier pillar stability. Mining Engineering. 2015. Vol. 67, No. 3. pp. 59–67.
17. Ollesson N. Automatic confi guration of vision sensor. Linköping University, The Institute of Technology. 2013. 48 p.