“两硬”条件下工作面“初次见方”强矿压显现防治措施研究

Under the condition of "two hard" face "first square" strong pressure appeared prevention measures of research

回采工作面推采至"初次见方"影响区域时,极易造成采空区大面积悬顶、弹性能积聚现象,同时受"两硬"煤层条件、临空等因素影响,强矿压显现危险程度较高。为有效预防强矿压显现事故的发生,本文以巴彦高勒煤矿311103回采工作面为例,阐述了该面通过采取施工大直径卸压孔、爆破断顶等措施,保证了工作面"初次见方"期间的安全生产,为强矿压显现矿井工作面的安全生产提供了较好的借鉴意义。

When working face mining to the influence area of"first square",it is extremely easy to cause the largehanging roof in the gob that cause the elastic energy accumulation phenomenon,also influenced by the"two hard"coal seam conditions and other factors,the risk degree of strong mine pressure is higher.In order to effectivelyprevent strong strata behavior accidents,taking the311103working face of coal mine formation in Bayangaole asan example,describes the measures taking the construction of large diameter pressure relief hole,cutting roof byblasting and others to ensure the safety production of working face in"the first square"period,which provides a goodreference to show safety mine working face strong pressure.