Problems of Drainage in an Open Pit Mine under Complex Geological Conditions and Solutions for Waterlogging of the Coal Deposit: A Case Study of the 'Field E' Open Pit

Abstract

The open-pit mine "Field E" is characterized by an extremely complex geological structure, strong bending of coal layers and a great depth of occurrence. The work of dewatering and pre-draining the mine for the purpose of achieving favorable mining conditions consists of several separate problems, depending on the position of the aquifer in relation to the coal seams.Generally speaking, there are three aquifers, different in terms of distribution, depth, method of recharge and the phase of exploitation in which their drainage is required. For this reason, the layers are considered separately and each of them requires a special approach to drainage.This paper will present all the designed measures for the drainage of the mine "Field E", their predicted effects, and will also discuss additional, innovative methods that may be used as intervention measures if necessary.