水力压裂技术在保德煤矿初次放顶的应用
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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。
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.
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.
引文
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[3]冯彦军,康红普.水力压裂起裂与扩展分析[J].岩石力学与工程学报,2013,32(S2):3169-3179.
[4]闫少宏,宁宇,康立军,等.用水力压裂处理坚硬顶板的机理及实验研究[J].煤炭学报,2000,25(1):32-35.
[5]孙守山,宁宇,葛钧.波兰煤矿坚硬顶板定向水力压裂技术[J].煤炭科学技术,1999,27(2):55-56.
[6]杨胜利.寺河煤矿二号井工作面坚硬顶板定向水力压裂研究[J].科技与企业,2014,23(18):90-90,92.