Determination of roof rock weakening zones in extraction columns based on seismic exploration

Sergei Sokolov,Peet-Mati Sööt,Gennady Rout,Anastasiya Kolmakova,L.D Pavlova,V.I Klishin

doi:10.1051/e3sconf/202133004007

Abstract

This article highlights the difficulties that arise in coal mining when roof areas have fractures with an opening of up to 0.2 - 0.5 m. Such situations may cause roof collapse. The seismic exploration method used by the authors to assess the geomechanical characteristics of extraction columns is described. The results of work on identification and registration of unstable roof areas are presented.

Highlights

Mining and geological conditions of a coal deposit are one of the main factors affecting the development of the deposit
Various geological aspects may have a negative impact on the coal mining process [1,2]
The second stage involved: analysis of the wave field in order to determine the amplitude-frequency spectrum of the recording, identification of interference waves; selection of filtering parameters applied to the original records in order to suppress interference waves; selection of a high-speed law and entering it into the database; editing seismic records while entering the revised files into the database; selection of muting parameters; summation by common depth point method (CDPM)

Summary

Introduction

Mining and geological conditions of a coal deposit are one of the main factors affecting the development of the deposit. The safety and continuity of the underground coal mining process is largely determined by the technological capabilities of the equipment and the absence or presence of negative conditions within the mining section. In this case, the timely receipt of information about the state of the coal-rock massif plays an important role. The development of Longwalls No 3, 5, 9, and 10 was envisaged under the former hydraulic dump of the Kedrovsky Open-Cast Mine, into which a rock dump was formed This created an alluvial mass as a result of the slurry from the stripping operations at the Kedrovsky Mine. As a result of one of them, more than 80% of the space to the face zone of the longwall was blocked by crumbling tuff conglomerate, and the face conveyor and the shearer were partially backfilled

Methodologies

Results and discussion

Conclusion