【摘要】 房柱法开采后形成了大量采空区,随时间推移,矿柱的岩体强度下降,采空区面积增大,造成部分矿柱因应力转移而使载荷增加,在外力作用下矿柱发生连锁垮塌,大面积顶板在较短时间内冒落,对生产设施、人员造成危害。根据矿山的实际情况采取强制放顶等技术措施,及时处理采空区,可从根本上消除这一危害。更多还原

【Abstract】 A great number of worked-out section area were formed after a gypsum mine was mined in the form of pillar-room,with the time passing,the rock strength of jamb builds down。The load of a great number of jambs increases by reason of stress transferring while worked-out section area expands,jambs break down due to external force , and great extent of roof falls down in short time,which makes air in worked-out section area be compressed sharply and engenders airflow that will burst fixture and hurt people。To resolve the harm,the technology of forced collapse weighting is adopted in time to treat the mine worked-out area.更多还原