DETERMINATION OF THE ROCK FAILURE STEPS OVER A GOAF IN THE LONGWALL

Details

Parent Category: Geo-Technical Mechanics, 2014

Category: Geo-Technical Mechanics, 2014, Issue 114

UDC 622.831.3

Authors:

I.V. Antypov, D. Sc. (Tech.), Professor,

N.I. Lobkov, D. Sc. (Tech.), Associate Professor,

Ye.D. Stadniuk, Doctoral Student,

I.V. Zhukovtsov,Doctoral Student

(IFGP NAS of Ukraine)

Abstract.

The article describes the strata movement over the waste and role of the rock bedded structure. On the basis of the results obtained a calculation method was worked out for predicting a rock failure at primary and secondary basic roof breaks. It is stated that crack propagation in the curved rock layers with taking into account an effective surface energy (crack growth resistance) as a constant of the rock material in the layer helps to compute limiting spans of the rock layers before their failure. The equations created for determining first and the next rock failures help to predict steps of the roof breaks in the longwall on the stage of planning winning operations basing on the data of geological survey.

Keywords:

 wall rocks, roof break, face, longwall,  face area, containing mass

References:

1. Borisov, А.А. (1980), Mehanika gornykh porod i massivov [Mechanics of rocks and massifs], Nedra, Moscow, SU.

2. Klochko, I.I. and Lobkov, N.I. (2011), “Features of change of a tension ahead of a lava in the course of coal dredging”,  Visti Donetskogo girnychogo instytutu, vol. 2, pp.136 – 141.

3. Klochko, I.I. and Lobkov, N.I. (2011), “Formation of breaking points in pedigree layers when conducting clearing works” Visti Donetskogo girnychogo instytutu, vol. 1, pp.106 – 111.

4. Griffits, A. The theory of rupture. Proceedinq of 1-st International lonq. Appl. Mech., Delft, 1924, p. 55-63.

About the authors:

Antypov Igor Vladislavovich, Doctor of Technical Sciences (D. Sc), Professor, Deputy director; Institute of physics of rock processes of the National Academy of Science of Ukraine (IFGP NAS of Ukraine), Donetsk, Ukraine.

Lobkov Nikolay Ivanovich, Doctor of Technical Sciences (D. Sc), Associate professor, Head of Department, Institute of physics of rock processes of the National Academy of Science of Ukraine (IFGP NAS of Ukraine), Donetsk, Ukraine.

Stadniuk Kateryna Dmitrivna, Doctoral Student, Institute of physics of rock processes of the National Academy of Science of Ukraine (IFGP NAS of Ukraine), Donetsk, Ukraine.

Zhukovtsov Igor Vasilevich, Doctoral student, Institute of physics of rock processes of the National Academy of Science of Ukraine (IFGP NAS of Ukraine), Donetsk, Ukraine.

• < Prev
• Next >