In allusion to hydraculic support of structredness attaint countermeasure,according to 21121 working face act case,combine mine drang appear rule,mutual it appear causation carry through analyes explan,and advance prevent countermeasure.

• 针对综采放顶煤支架出现的结构性损坏,以21121综放工作面为例,结合矿山压力显现规律,对其原因进行分析说明,并提出了防止对策。