【摘要】 运用分形理论 ,通过现场观测 ,揭示了综放工作面在支承压力作用下煤体的压裂规律 :硬煤裂隙演化经历两次加密和两次扩展过程 ,中硬煤、软煤经历一次加密和扩展 ,中硬煤以裂隙加密为主、扩展为辅 ,软煤则以裂隙扩展为主、加密为辅更多还原

【Abstract】 Based on fractal theory and spot observation, the fracture evolution law of coal mass is revealed, which has close relation with the cracking action of abutment pressure in fully mechanized coal face. The fracture evolution of hard coal experiences dense increase and expanding twice, but that of medium-hard coal and soft coal experiences dense increase and expanding once respectively. For medium-hard coal, dense increase is primary and expanding is secondary, and for soft coal, expanding is primary and dense increase is secondary.更多还原