Developing technological schemes of driving workings with controlled resistance of contours
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- Category: Mining
- Last Updated on 29 June 2019
- Published on 13 June 2019
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Authors:
V.F.Dyomin, Dr. Sc. (Tech.), Prof., orcid.org/0000-0002-1718-856X, Karaganda State Technical University, Karaganda, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
A.T.Batyrkhanova, orcid.org/0000-0001-9976-9028, Karaganda State Technical University, Karaganda, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
A.N.Tomilov, orcid.org/0000-0001-6236-9231, Karaganda State Technical University, Karaganda, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
A.Ye.Zhumabekova, orcid.org/0000-0002-1501-5382, Karaganda State Technical University, Karaganda, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
U.E.Abekov, orcid.org/0000-0001-6686-4926, Karaganda State Technical University, Karaganda, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract:
Mine workings represent a technological hazard in the absence of devices for their safe development.
Purpose. Reinforcement of the contours of mine workings as a safety measure of developing mine workings.
Methodology. The study algorithm is represented in the sequence of stages considering the depth of the excavation, the orientation of the excavation relative to the coal seam, the structure of the coal-bearing layer, the mechanical characteristics of the enclosing array in the preliminary and limit state of typical cross section of the development, the construction and technological characteristics of the supports.
Findings. The study offers data that indicate that if the development area belongs to a flooding area, then the re-installation of finger bars can be less effective by more than 40%. Field studies have shown that when the second-level roof bolting is installed in workings, which are used repeatedly, then they are most likely to have deformed parts in the roof and sides.
Originality. For the first time mathematical models for determining the stability of mine workings are used, as well as models that allow extending the contours of mine workings safely. The requirements for materials that allow carrying out reinforcement of contours considering the structure and technological scheme of the applied technology were determined. This article presents a mathematical model, the approbation and verification of the data obtained at the experimental location. Observations were made regarding the state of workings anchored by roof bolting in the vicinity of geological faults in the zone of influence of high rock pressure of Kostenko, Saranskaia, and Abaiskaia Mines of JSC “Arcelor Mittal Temirtau”. Effects of primary stresses on opening strength are determined.
Practical value. The acquired technology can be used in a controlled environment for the development of mine workings, which have signs of residual capacity and can be developed at better rates and volumes. Testing the method of automated calculation of anchoring parameters and the implementation of research results can improve the technological schemes of the working. Consistencies in calculating the stability of mine workings from the parameters of anchoring was achieved.
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