综采工作面采空区下开采端头悬顶控顶技术

Roof control technology of roof hanging at face end under the goaf in fully-mechanized mining face

为了有效解决哈拉沟煤矿12103综采工作面回顺采空区悬顶问题,通过分析该巷道悬顶原因,提出了将锚索支护排距调整为4 m,每排3根锚索;工作面推进速度不超过1.1 m/d;提前在回顺顶板打一排炮眼,待炮眼推过回顺端头支架顶梁1 m后联线放炮放顶等悬顶控顶技术。

In order to effectively solve the roof hanging problem of air return roadway in No. 12103 fully-mechanized mining face of Halagou coal mine,the roof hanging control technologies,such as the row spacing of anchor support is adjusted to 4 m and 3 cables per row by analyzing the causes of roof hanging. The advancing speed of mining face is controlled not more than 1. 1m per day,and the forced caving is used by drilling and blasting were put forward.