Yalanskiy A.O., Slashchov І.M., Slashchova O.A., Seleznov A.M., Arestov V.V. Development of new auxiliary measures for protecting preparatory roadways by the cast strips

Details
Parent Category: Geo-Technical Mechanics, 2018
Category: Collection of scientific papers «Geotekhnicheskaya Mekhanika» Issue 141

Geoteh. meh. 2018, 141, 3-17

https://doi.org/10.15407/geotm2018.141.003

DEVELOPMENT OF NEW AUXILIARY MEASURES FOR PROTECTING PREPARATORY  ROADWAYS BY THE CAST STRIPS

1Yalanskiy A.O., 1Slashchov І.M., 1Slashchova O.A., 1Seleznov A.M., 1Arestov V.V.

1Institute of Geotechnical Mechanics named by N. Polyakov NAS of Ukraine

UDC 622.831.31

Language: Russian

Annotation.

The article presents development of new auxiliary measures for protecting preparatory roadways by cast strips made of fast-hardening materials. It is known that in the zone under the influence of winning operations, the preparatory roadways in the coal mines are intensively deformed, and considerable amounts of material resources are spent for their repair due to the vast displacements of the rock contour. For the purpose of reusing the preparatory roadways in case of relatively hard rocks in the roofs, cast strips or their combinations with arch supports and anchor bolting are often used as a support. The problems that arise in this case are connected with the soft soil rocks soaking in the coal seams, hypsometry of the roof and insufficient strength of the strips at the initial stage of the strength gaining. Facilities and methods for preparatory roadway supporting often do not correspond to geomechanical features of the rock pressure manifestations, which becomes the main cause of unsatisfactory state of the mine roadways. In order to estimate potential reserves for improving efficiency of the cast strip used together with other roadway supports, a mathematical model of the complex-structured rock massif was validated. The mathematical modeling of the stress-strain state was performed with the help of finite element method. The rigid and yielding cast strips, various technologies for their erection, as well as a combination of the cast strips with anchor bolting and arch support were modeled. Locations and sizes of rock fall zones and rock massif stresses were determined for various types of supporting. Drawbacks of existing technologies for cast strip erection and factors, which can improve their technical efficiency, were specified. On the basis of research results, new methods of cast strip erection were developed, which made it possible to control their resistance and impact on the stress-strain state of the adjacent rock massif. The mathematical modeling of specific mining and geological conditions for concrete mine showed satisfactory convergence with the field data, therefore, the proposed technical solutions can be effectively applied in production.

Keywords:

protection mine workings, cast strips, computer modelling by the method of finite elements, methods and facilities of supporting.

References

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About the authors

Yalanskiy Anatoliy Aleksandrovich, Doctor of Technical Sciences (D.Sc.), Senior Researcher, Principal Researcher in Rock Mechanics Department, Institute of Geotechnical Mechanics named by N. Polyakov NAS of Ukraine (IGTM NAS of Ukraine), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Slashchov Ihor Mykolayovych, Candidate of Technical Sciences (Ph.D), Senior Researcher, Senior Researcher in Department of Mineral Mining at Great Depths, Institute of Geotechnical Mechanics named by N. Polyakov NAS of Ukraine (IGTM NAS of Ukraine), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Slashchovа Yelena Anatolyevna, Candidate of Technical Sciences (Ph.D), Senior Researcher, Senior Researcher in Department of Mineral Mining at Great Depths, Institute of Geotechnical Mechanics named by N. Polyakov NAS of Ukraine (IGTM NAS of Ukraine), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Seleznev Anatoliy Mikhaylovich, Master of Science, Principal Specialist in Rock Mechanics Department, Institute of Geotechnical Mechanics named by N. Polyakov NAS of Ukraine (IGTM NAS of Ukraine), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Arestov Vadym Viktorovych, Master of Science, Doctoral Student, Institute of Geotechnical Mechanics named by N. Polyakov NAS of Ukraine (IGTM NAS of Ukraine), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.