(discontinuous deformation analysis for rock failure) method was used to research the roadway along goaf of 11302 workface in Zhaolou Colliery. In order to get its failure deformation and control mechanism

DDARF was first used to analyze the crack propagation of single joint anchored specimen under uniaxial compression

then the stimulation result of real roadway was compared with monitoring data from geomechanical model test and field test

to verify its correctness. The focus was on the crack evolution law of surrounding rock in the roadway along goaf. In order to quantitatively analyze the crack evolution in DDARF calculation

two indexes of (crack ratio) and (crack reduction ratio) were defined. Research results showed that the DDARF simulation results were consistent with uniaxial compression test of single joint anchored specimen. In the DDARF calculation of surrounding rock deformation in the roadway driving along goaf

it was shown that the deformation of coal side next to goaf was the largest

followed by roof and integrated coal side

floor was the least

and the monitoring data from model test and field test were both consistent with the result. According to the two indexes and

quantitative analyses was conducted to compare the crack evolution of non-anchored and anchored roadways

and the result was consistent with the deformation trend that is . As the surrounding rock had been seriously crushed

although supporting scheme was effectively

the max crack ratio with anchor supported was still 2.13 times of the . In order to maintain the stability of surrounding rock

the key parts of zoneⅠ and zone Ⅱ should be strengthened besides asymmetric supporting with anchors. For the stimulate result was closer to actual engineering

DDARF method could not only be used to research crack evolution and failure deformation

but also guide countermeasure to control these roadways effectively.