E3S Web Conf.
Volume 201, 2020Ukrainian School of Mining Engineering - 2020
|Number of page(s)||14|
|Published online||23 October 2020|
Geomechanics of overworked mine working support resistance in the laminal massif of soft rocks
1 Dnipro University of Technology, Department of Mining Engineering and Education, 19 Yavornytskoho Ave., 49005 Dnipro, Ukraine
2 Dnipro University of Technology, Department of Labour Protection and Civil Safety, 19 Yavornytskoho, 49005 Dnipro, Ukraine
3 Mineral and Energy Economy Research Institute of the Polish Academy of Sciences, Division of Mineral Resource Acquisition, 7 Wybickiego St., 31-261 Krakow, Poland
4 LLC “DTEK Energy”, Department on Сoal Production, 57 Lva Tolstoho St., 01032 Kyiv, Ukraine
5 MM “Dniprovske”, PJSC “DTEK Pavlohradvuhillia”, 76 Soborna Ave., 51400 Pavlohrad, Ukraine
* Corresponding author: firstname.lastname@example.org
The relevant issues of ensuring trouble-free mining operations on the underlying horizons, which are partially or fully overworked are studied in this paper. The problem has been solved using the example of a laminal massif of the Western Donbas soft rocks; complicating factors were taken into account: water-cut, fracturing, and the rheological properties manifestation. The model, proposed for calculation, has been substantiated in view of geomechanics, as well as the finite element method has been chosen to obtain the stress-strain state of the adjacent massif and support. At the first stage, mine observations of the state of mine working planned for overworking have been conducted and analysed. At the second stage, a computational experiment has been conducted in the most difficult areas. The stresses fields have been analysed according to vertical, horizontal and stresses intensity components of the soft rocks laminal massif, as well as their distribution curves for the recommended and basic fastening options. It has been proved that the recommended parameters of the fastening structure provide repair-free mine working maintenance for the entire exploitation period with account of overworking. Recommendations have been developed for mining the seam C6 in M.I. Stashkova Mine, DTEK Pavlohradvuhillia PJSC.
© The Authors, published by EDP Sciences 2020
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