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STABILITY OF ANCHORED MINE DURING
DRILLING-AND-BLASTING O.P.
Krukovskyi1*, V.V. Krukovska1 1M.S. Polyakov Institute
of Geotechnical Mechanics NAS of Ukraine, Dnipro, Ukraine *Corresponding author: e-mail: igtm@ukr.net Physical and
technical problems of mining production, 2019, (21), 67-77. https://doi.org/10.37101/ftpgp21.01.006 ABSTRACT Purpose. Numerical simulation of rock deformation during
explosion of explosive charges in the mine face with anchor support, an analysis of the effect of explosive action on the stress state of
marginal rocks and the operability of the roof bolting. Methods. By the
finite element method, coupled non-stationary problems were solved: elastoplastic deformation of rocks and filtration of
methane and gaseous detonation products in the disturbed region. Findings. The calculation of the stress field,
zones of inelastic deformations and gas pressure in the face of the mine with
anchor support were made for geological and mining
conditions for the gutter of the 5th eastern sloping wall of the Samsonovskaya-Zapadnaya mine. The analysis of the
changes in the geomechanical and filtration
parameters in the face of the mine with the anchor support during its driving
with the blasting method was performed. It is shown that during the drilling of holes and the
installation of explosive charges, the contour rocks are unloaded from rock
pressure; the coal seam is partially degassed. As a result of the
explosion, the stress distribution in the mine face and the roof changes.
The zone
of completely destroyed rocks is formed around the
charges. It spreads down to the face surface. The moment in time when the
rocks in the mine roof are not yet unloaded from
rock pressure is favorable for the installation of the next row of anchor
supports. Originality. For
the first time, parameters of the stress-strain state of the rocks and
construction of the rock-bolt bridge are calculated
in a technological cycle of setting the roof bolts during blasting
operations. Practical
implications. It is
shown that the
stability of the mine working is ensured with the timely installation of anchors
and compliance with the anchoring technology. In this case, the host rocks will be preserved intact even during blasting operations. Keywords: roof bolting, stress state of rocks, drilling-and-blasting
operations, stability of the roadway. REFERENCES 1. Gamayunov, V.V., Druczko, V.P., Gnezdilov, V.G. i dr.
(2004). O napravlenii razvitiya tekhnolo-gii sooruzheniya gorizontal`ny`kh i naklonny`kh gorny`kh vy`rabotok v slozhny`kh gorno-geologicheskikh usloviyakh. Geotekhnicheskaya mekhanika. Dnepropetrovsk: IGTM NAN Ukrainy`,
(51), 92-102. 2. Bulat, A.F., Vinogradov,
V.V. (2002) Roof bolting support of
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doslidzhennia stanu hirskoho masyvu navkolo hirnychoi vyrobky z ankernym kriplenniam pry yii provedenni buropidryvnym sposobom. pat. 107070 UA, u 2015
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10/2016. 5. Krukovska, V.V. (2015) Simulation of coupled processes that occur in
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(2000). The finite element method.
Butterworth-Heinemann, Ò. 1, 690 p. 7. Hutton,
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I.A. (1979). Vzry`vnoe razrushenie vy`brosoopas-ny`kh porod v glubokikh shakhtakh. M.: Nedra, 253 p. 9. Krukovskyi, O.P., Krukovska, V.V. Velbovets, S.N. (2012) Issledovanie napryazhennogo sostoyaniya nezakreplennoy chasti krovli nad zaboem vyirabotki
s ankernoy krepyu pri ee provedenii
burovzryivnyim sposobom”, Proc.
of the VIII International scientific and practical conference
“Perspetywiczne opracowania sa nauka i
technikami”,
Przemysl, Nauka i studia, (21), 11-15. ABOUT AUTHORS Krukovskyi Olexandr Petrovych,
Corresponding Member of NAS of Ukraine, Doctor of Technical Sciences (D. Sc), Deputy
Director of the institute, M.S. Polyakov
Institute of Geotechnical Mechanics under the National Academy of Sciences of
Ukraine, 2A Simferopolskaya Street, Dnipro,
Ukraine, 49005. E-mail: igtm@ukr.net.
Krukovska Viktoriia Viktorivna, Doctor of Technical Sciences (D. Sc), Senior
Researcher, Senior Researcher in
Department of Control
of Dynamic Demonstrations of Rock Pressure, M.S. Polyakov Institute of Geotechnical Mechanics under the
National Academy of Sciences of Ukraine, 2A Simferopolskaya
Street, Dnipro, Ukraine, 49005. E-mail: vikakrukk@gmail.com.
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