Prokopievsk Division, Kuznetsk State Technical University, Prokopievsk, Russia:

N. T. Bedarev, Associate Professor, Candidate of Engineering Sciences
O. V. Lyubimov, Associate Professor, Candidate of Engineering Sciences, oleg_lyubimov@mail.ru
N. V. Grigorieva, Lecturer

Zapsib PromEngineering, Moscow, Russia:

A. R. Shaikhislamov, Chief Executive Officer

The review of the studies into phenomena caused by rock pressure in different geological and geotechnical conditions both in Russia and abroad shows that the accumulated experience should be essentially adjusted as new coal fields in Kuzbass (Erunakovo, Kazankovo and other), characterized with low strength and deformability of host rocks, higher abundance of water and other factors, lack any recommendations arrangement of excavation and development roadways relative in closed-spaced coal seams relative to the zones of increased rock pressure. The article describes research findings on the phenomena caused by rock pressure in terms of Tagarysh mine; the research is aimed to obtain new information to compare it with the known data and with the results of other researchers. In situ observations over displacements at the boundary of development roadways and in the roof in mind-out voids are described; behavior of pressure in caved rocks on the seam floor as well as the pressure variation in units of the powered roof support system MKD in the course of the face advance are characterized. An attempt is made to connect phenomena caused by rock pressure with the stages of roof spalling until failure and, later on, with the caving steps (primary and subsequent). In the case discussed, a signature of rock pressure formation, as against the other deposits, is fast filling of mined-out voids with small size argillite, which serves as a backfill (a cushion) in this mined-out void.

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