Abstract: The coal tunnel is excavated in isolated coal pillar area in a mine, and some technical problems are met, such as super-high abutment pressure, broken coal and rock, large section and so on.Aiming at these problems and according to the characteristics that the pre-stressed cable truss system can change the stress state of surrounding rock, the joint support technology is designed combined with the field conditions of the mine.Field implement shows that the joint support technology based on cable truss can solve the support problems of large section coal tunnel with super-high abutment stress.

Key words: Isolated coal pillar, Anti-arch action, Table truss, Coal tunnel