工作面初采深孔预裂爆破顶板活动规律研究

Discussion on Roof Movement Rule of Deep Presplit Blasting in Primary Mining Period on Working Face

通过对工作面坚硬顶板深孔爆破预裂技术研究,报告了坚硬顶板在深孔预裂爆破后是否能成功达到截断控制顶板结构岩层的现状,进行了采场上覆岩层运移的调查研究,提出了对工作面液压支架压力监测仪数据统计分析的方法,得出复杂地质条件下老顶的初次来压步距、周期来压步距,以此来了解老顶的活动规律。

By studying the deep blasting presplitting technology of hard roof on the working face, this paper reported the present situation that whether hard roof can successfully reach truncated control roof structure rock stratum after the deep-hole blasting,researched overlying strata movement above the working face, presented method to statistically analyzed the pressure monitor data of hydraulic support on working face, and obtained first weighting step distance of main roof, periodic weighting step distance under complicated geological conditions to understand the activity patterns of the old roof.