坚硬顶板下工作面初采水压致裂弱化顶板技术应用

Application of Weakening Roof Technology by Hydraulic Fracturing in Primary Mining Working Face under Hard Roof

为防止回采初期坚硬顶板出现大面积悬顶,以煤峪口矿8701工作面赋存粉砂岩与细砂岩互层结构的坚硬顶板为工程背景,提出采用水压致裂弱化顶板技术,并设计了相关技术参数。采用该技术后,初次来压步距和强度均有明显的降低,表明了坚硬顶板下工作面初采水压致裂弱化顶板技术的优越性和合理性。

In order to prevent the occurrence of large area hanging roof in the hard roof during the early stage of mining,taking the hard roof with siltstone and fine sandstone interlayer structure in the 8701 working face of Meiyukou Coal Mine as the engineering background,the technology of weakening roof by hydraulic fracturing is put forward,and the relevant technical parameters are designed.After adopting this technology,the initial pressure step distance and strength are obviously reduced,which shows the superiority and rationality of the technology of weakening roof by hydraulic fracturing in primary mining working face under hard roof.