STUDY ON RHEOLOGICAL CHARACTERISTICS OF COAL-ROCKMASS OF WIDE AND HIGH COAL PILLAR

Rheological test of coal rockmass of coal pillar is the basis for both the determination of long term strength of pillar and evaluation of long term stability of pillar.With the wide and high coal pillar in Xinglongzhuang Coal Mine as the test object,the paper analyzes in detail the creep characteristics.long term strength,failure characteristics,impacts imposed by factors like rock mass structure and confining pressure etc on the rheological characteristics.