摘要
针对沿空留巷处于采空区附近区域的采动影响较大,巷道变形较大等问题。本文利用静态破碎剂遇水膨胀的原理,对直接顶进行切顶卸压。通过研究钻孔的破碎机理和裂缝的扩展情况,并结合官地矿12607工作面现场实际情况,给出了钻孔设计的最合理间距为0.9 m,对巷道的稳定性作出了一定的贡献,为研究沿空留巷时巷道变形较大,顶板下沉量大等问题作出了一定的贡献。
Aiming at the problems of large mining influence and large deformation of goaf retaining roadway near goal, the principle of static crushing agent expanding in the presence of water is used to cut the top of the direct roof and relieve pressure in this paper. By studying the fragmentation mechanism of boreholes and the propagation of cracks, combining with 12607 working face of Guandi mine, the optimum distance of boreholes design is 0.9 m,which contributes to the stability of roadways. It also contributes to the study of large deformation of roadways and large roof subsidence when retaining roadways along goal.
作者
杜利伟
Du Liwei(Guandi Mine,Shanxi Coking Coal Group Co.,Ltd.,Taiyuan Shanxi 030022)
出处
《山西冶金》
CAS
2020年第4期76-78,共3页
Shanxi Metallurgy
关键词
沿空留巷
静态卸压
裂缝扩展
钻孔步距
gob-side entry retaining
static pressure relief
crack propagation
drilling step
