Authors: A.V. Remezov, V.O. Torro, Ye.V. Kuznetsov, Klimov

Title of the article: Analysis of instrumental monitoring of convergences in conveyor roadway 18-8 during mining of extraction panels in seam Tolmachyovsky in the ascending order

Year: 2017, Issue: 4, Pages: 47-57

Branch of knowledge: Earth sciences

Index UDK: 622.831.1

DOI: 10.26730/1999-4125-2017-4-47-57

Abstract: This article shows the results of the study conducted during mining of extraction panels in the western part of dip-working panel 18-2 in Tolmachyovsky seam at Polysayevskaya mine in the ascending order. The purpose of the study was to determine the optimum sizes of coal safety pillar for the developments delineating an extraction pillar and to identify the practical place for driving a dismantling chamber. Observations over displacement of the massif were made in five measuring points (measuring stations), and also by visual inspection of the condition of the contour and the supports of the development protected by the massive - coal pillar method. The studies were carried out in accordance with the developed mine test technique. As a result of the studies conducted during mining of extraction panels 18-10, 18-8 and 18-6 in ascending order, all objectives were solved. In particular it was established that at the descending order of mining extrac-tion panels columns in comparison with the ascending order on flat seams, the bearing abutment pressure on pillars between longwalls increases by 1.7-2.5 times due to the action of the maximum bending moment of hanging cantilevers, i.e. M (x) voskh. = (0,4-0,6) M (x) niskh.

Key words: a mining face replacement longwalls safety pillar a zone of the increased rock pressure mining geological conditions coal spalling from side walls roof subsidence rock pressure set of longwall mining equipment dismantling chamber a hypothesis of beams a roof caving increment

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