Tripolski V.N., Buryak N.A., Vojtovich Т.G. Technological schemes for supporting reused gate roads by the cast strips

Details
Parent Category: Geo-Technical Mechanics, 2018
Category: Collection of scientific papers «Geotekhnicheskaya Mekhanika» Issue 140

Geoteh. meh. 2018, 140, 13-22

DOI: https://doi.org/10.15407/geotm2018.03.013

TECHNOLOGICAL SCHEMES FOR SUPPORTING REUSED GATE ROADS BY THE CAST STRIPS

1Tripolski V.N.,1Buryak N.A.,1Vojtovich Т.G.

1Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine

UDC622.831.24(083.96)

Language: Ukrainian

Abstract.

For the repeated use of gate road as the air roadway, the combined systems of its supporting are use. One of the tasks is supporting of roof edge (berms) by anchors on the interface “gate road - face”. Traditional methods of the berm supporting is piling of wooden chocks, rubble blocks, etc. However, these constructions do not feature yielding, and at great loadings they are pressed into the floor or collapsed. When floor and roof rocks are hard, roof edge falls down. One of the promising methods of supporting the gate roads is cast strips.

Technological schemes determine the procedure for performing technological operations for supporting the gate roads by the cast strips in order to reuse them for the next column. The method of supporting the gate roads by cast rigid strips is considered as one of the promising ones, which ensures reduction of costs of the working supporting, their reuse in conditions of intensive mining of coal seams by highly-productive longwalls, mechanization of the strip construction and improvement of ventilation in the working areas. Geomechanics of the method is based on new scientific knowledge about mechanic and synergistic phenomena, which have confirmed that the use of fast-hardening materials with a high level of work mechanization is a promising trend. The scope of application of rigid cast strips is determined, when high performance and safety of work on the method implementation is ensured. The cast strips make it possible to use direct-flow ventilation pattern in the face, localize methane in the goaf behind the longwall, significantly reduce friction of local workings and cut cost of their recovery when reused for excavating the adjacent column. The proposed technology allows increasing load on the face, reducing zones with rock failure, increasing its marginal, interlayer and deep stability, and ensuring preservation of the cross-section of local working up to 80% of the design cross section.

Keywords: technological schemes, gate roads, cast strips, reuse, direct-flow ventilation, swelling, rock massif.

References:

1. Baisarov, L.V., Ilyashov, M.A. and Demchenko, A.I. (2005), Geomekhanika i tekhnologiya podderzhaniya povtorno ispoi’zuyemykh vyrabotok [Geomechanics and technology for maintaining reused workings], Lira LTD, Dnepropetrovsk, Ukraine.

2. Baisarov, L.V., Ilyashov, M.A. and Demchenko, A.I. (2001), “Geomechanics and technology for maintaining reused workings”, Coal of Ukraine, no. 9, pp. 6-9.

3. Bulat, A.F., Ilyashov, M.A. and Usachenko, B.M. (2009), “Technological regulation of the maintenance of reusable excavation drifts combined security systems”, Monolith, Dnepropetrovsk, Ukraine.

4. “Vremennaya instruktsiya po okhrane vyyemochnykh vyrabotok polosami iz tverdeyushchikh materialov”[Temporary instructions for the protection of excavation workings strips of hardening materials ] (1981), IGD im. A.A. Skochinskogo, Moscow, SU.

5. Rotkegel, M., Bock, S. (2015), "Impact of bearing plates dimensions on interaction of mine workings support and rock mass", Journal of Sustainable Mining, Vol. 14, Issue 1, pp. 12-20.

https://doi.org/10.1016/j.jsm.2015.08.003

6. Singh, G.S.P. (2015), "Conventional approaches for assessment of caving behaviour and support requirement with regard to strata control experiences in longwall workings", Journal of Rock Mechanics and Geotechnical Engineering, Vol. 7, Issue 3, pp. 291-297.

https://doi.org/10.1016/j.jrmge.2014.08.002

7. Singh, G.S.P. and Singh, U.K. (2015), "Prediction of caving behavior of strata and optimum rating of hydraulic powered support for longwall workings", International Journal of Rock Mechanics and Mining Sciences, Vol. 47, Issue 1, pp. 1-16.

https://doi.org/10.1016/j.ijrmms.2009.09.001

About the authors:

Tripolski Valerij Nikolaevich, Master of Science, Principal Specialist in Rock Mechanics Department, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM NASU), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Burjak Nikolaj Afanasievich, Master of Science, Principal Specialist in Rock Mechanics Department, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM NASU), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Vojtovich Tatiana Gennadievna, Doctoral Student in the Department in Rock Mechanics Department, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM NASU), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.