综采工作面水力压裂采煤技术分析

Analysis of Hydraulic Fracturing Mining Technology in Fully Mechanized Coal Mining Face

官地煤矿8#煤层28418工作面的顶板整体较为坚硬,根据探测发现,存在上下两层硬度较高的石灰岩层,完整性也相对较好,这就导致工作面在开采时,出现了较为明显的初次垮落的步距非常大,若不采取强制放顶措施,根据测算表明,步距能够超过40m,带来的后果较为严重。同时,本矿井属于瓦斯相对较高的矿井,选择使用传统的深孔爆破的方式,危险性相对较高,因此,可选择使用高效水力压裂顶板的方式,提升工作面的安全效果。

The roof of 28418 working face in 8#coal seam of Guandi Coal Mine is relatively hard as a whole.According to the detection,there are two limestone layers with higher hardness,and the integrity is relatively good,which leads to the obvious initial caving step in the working face during mining.If the forced caving measures are not taken,the calculation shows that the step distance can exceed 40m,resulting in serious consequences.At the same time,this mine is a mine with relatively high gas content.If traditional deep-hole blasting is used,the risk is relatively high.Therefore,high-efficiency hydraulic fracturing can be used to improve the safety effect of the working face.