Technological Solutions for Processing Closed Coal Mines by Open Pit Method

Vladimir Makarov,Riccardo Paulman,Péter Kovacs,Samuel Dagmar,M Tyulenev,A Abay,S Zhironkin,S Anyona,A Khoreshok,D Nuray,Y Tan,S Vöth,M Cehlár,J Janocko

doi:10.1051/e3sconf/20184101041

Abstract

The main sources of environmental pollution are: pollution from the residual effects of working out of mine fields by underground method; pollution from secondary mining of mine fields by the open method. The pollution of the environment from the underground mining of mine fields is mainly due to the erosion of the surface of the ditches caused by collapse of the underground workings, spontaneous combustion of the remaining coal reserves and exit of poison gases SO2 and CO to the surface through the cracks from the lower horizons of the worked-out mine fields. This makes actual the research of technological possibilities of harmful emissions reducing when quarrying underground mines’ fields. The environment deterioration from conducting open pit mining operations in the underground mine fields is caused by the technological processes of quarrying (preparation of rock for excavation, excavation, transportation of rocks and coal, dumping), by the objects of the open pit infrastructure (industrial site, transport communications, trenches and other workings, coal storage and rock dumps). The main direction of eliminating the negative environmental consequences of underground mining is the localization or complete isolation of the underground mines influence’ on the surface.

Highlights

The negative influence of the technological processes of open pit mining is associated with drilling and blasting operations during loosening of hard rock with the emissions of dust and gas clouds, which includes fine-grained rock particles and poison gases
When the dump truck moves along the quarry roads, a dust emission from the milling of rocks occurs as a result of their interaction with the wheels
In the process of working out the underground mine field by quarrying, there is a reduction of harmful emissions into the environment – the consequences of underground mining – due to a reduction in the surface area of the underground mine field exposed to the influence of underground mine workings

Summary

Introduction

The negative influence of the technological processes of open pit mining is associated with drilling and blasting operations during loosening of hard rock with the emissions of dust and gas clouds, which includes fine-grained rock particles and poison gases. For overburden and coal transportation, the environment pollution occurs as a result of wind or air impact on the transported material during the dump truck movement with the formation of a dust trail of fine particles.

Results

Conclusion