【摘要】 为防止采空区大面积悬顶,以81307综放工作面为例,针对该工作面切眼段顶板厚度较大、整体性和稳定性都较好的特性,开展了水力压裂技术在综采工作面初次放顶的设计、施工、监测、效果验证等方面的应用研究。验证了该技术对顶板岩层的弱化、破坏完整性及初次垮落的作用。更多还原

【Abstract】 In order to prevent large area hanging roof in goaf,taking No. 81307 fully mechanized mining face as an example,in view of the characteristics of large thickness,good integrity and stability of the roof in the open-off cut section,the hydraulic fracturing technology was applied in the initial caving of fully mechanized mining face,and the effect of hydraulic fracturing technology on the weakening roof strata and destroying roof integrity in the initial caving was verified.更多还原