CHANGE OF STRESS FIELD AROUND THE MINE WORKING WITH DIFFERENT TYPES OF SUPPORT WHICH CONSERVATED AFTER WALL FACE DRIVING

Details

Parent Category: Geo-Technical Mechanics, 2015

Category: Geo-Technical Mechanics, 2015, Issue 121

UDC 622.281.74:622.831

Author:

Krukovskiy A.P., D.Sc. (Tech.), Senior Researcher (IGTM NAS of Ukraine)

Abstract.

This article describes how elastic-plastic deformation of rock and rock mass around the mining working in the area of its coupling with wall face. In the area of extraction influence support of mining workings is severely tested, as the loads are much increased. Therefore, the question of the optimal form of support for coupling has great importance, especially if mining working conservate for recycling.

Distributions of the parameters that characterize the value of different components of stress field and dumping of rock mass and zones of inelastic deformations in three cases: when applying frame, anchor-frame support and anchor-frame, reinforced rope anchors.

It is shown that extraction works with using frame support led to the formation of a zone of possible caving of the destroyed rock mass and critical rasing of value of different components by the left side of mining workings. The rock-anchor block are formed in the roof of mining workings if we using anchor support and load-carrying ceiling after wall face driving save working conditions. However, there is a possibility of sinking of bonded anchors block if we have non-sustainable conntry rocks or if we have weak rock layer in main roof of the mining workings. Therefore, we using long cable bolts as enforced support, that bond load-carrying ceiling with virgin rock mass.

Keywords:

roof bolting, anchor-cable supporting, stress-strain state, coupling drift with wall face

References:

1. Bulat, A.F. and Vinogradov, V.V. (2002), Oporno-ankernoe kreplenie gornyih vyirabotok ugolnyih shaht [Support-anchoring mine workings of coal mines], Dnepropetrovsk, Ukraine.

2. Aykhof, Yu. and Yurekka, H. (2002), “Anchoring – a key technology for high productivity longwall on a large dove”, Glyukauf, no. 2, pp. 27-32.

3. Krukovskiy, A.P. (2010), “Investigation of stress state of rock mass around workings in the zone of its conjunction with the longwall goaf”, Geotechnical Mechanics, no. 91, pp. 239-244.

4. Skipochka, S.I., Tripolskiy, V.N., Buryak, N.A. and Voytovich, T.G. (2014), “Analysis and improvement of methods and facilities for supporting the gate roads”, Geotechnical Mechanics, no. 115, pp. 109-119.

5. Kurnosov, A.T., Kurnosov, S.A. and Slaschev, I.N. (2009), “Solving the problem of maintenance of mine workings located in weak surrounding rocks”, Materialy XIX Mezhdunarodnoy nauchnoy shkoly [Proceedings of the XIX International Research School], Deformirovanie i razrushenie materialov s defektami i dinamicheskie yavleniya v gornyih porodah i vyirabotkah [Deformation and destruction of materials with defects and dynamic phenomena in rocks and workings], Simferopol, Ukraine, pp. 187-190.

6. Demin, V.F., Saranchukov, A.V. and Demin, V.V. (2008), “The nature of the demonstrations of rock pressure in different types of supporting the excavation workings”, Gornyiy zhurnal. Izvestiya vyisshih uchebnyih zavedeniy, no. 4, pp. 33-37.

7. Razumov, E.A. and Pozolotin, A.S. (2010), “Application of deep cable anchor in the fixing underground workings”, Ugol Kuzbassa, no. 6, pp. 60-61.

About the author:

Krukovskiy Alexander Petrovich, Doctor of Technical Sciences (D. Sc), Senior Researcher, Deputy Director of the institute, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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