Study on the subdivision support and rapid tunneling technology of coal mine roadway

Abstract

In the existing forming support technology of the existing coal mine roadway, the support cost time of the anchor (cable) accounts for a large proportion of the total time at the roadway excavation, and the deformation characteristics and variation regular patterns of the surrounding rock and support structure of the roadway are not fully considered, thus limiting roadway excavation rate cannot achieve rapid tunneling, which affects production efficiency. In the one-time forming support technology of coal mine roadway, the support time of bolt (cable) occupies 60∼70% of the tunneling time of the whole roadway, which greatly restricts the rapid tunneling of the roadway and does not fully consider the coordinated deformation of the surrounding rock and supporting structure of the roadway. The characteristics, therefore, can not ensure the economic rationality of the support scheme, resulting in an increase support costs and maintenance schedules. This article takes the transportation of 22202 working face in Zhang Jia Mao coal mine as the research object, and combines theoretical analysis and numerical simulation to study the technology of roadway sub-support and rapid excavation, and comprehensively consider the surrounding rock of the roadway in combination with the existing research shortage. With the stability of the supporting structure, a design scheme of the sub-support is proposed to ensure the economic and reasonable support scheme and better serve the safe and efficient production of the mine.