Non-pillar mining technique and its prospective application in underground coal mining in Vietnam

Abstract

The issue of enhancing coal mining efficiency by reducing support excavation costs, maintaining tunnels, and minimizing coal losses in pillar supports is a top priority in underground coal mining worldwide, including in Vietnam. Since 2010, the Chinese coal industry has introduced non-pillar mining technique (referred to as 110 technology: 1 working face, 1 tunnel, and 0 pillar support). This technology has successfully reduced the costs associated with maintenance and support excavation while significantly decreasing the coal loss rate in pillar supports in many mines. Through synthesis and analysis methods, this paper provides an overview of non-pillar mining technique and evaluates its potential application in underground coal mining in Vietnam.