回采面顺槽应力区顶板支护技术应用

Application of Roof Support Technology in Stress Area of Stope Gateway

游仙山煤矿15210工作面在回采过F9断层期间,在构造应力、回采超前应力等多重集中应力作用下,工作面回风顺槽顶板出现下沉、破碎现象,威胁着工作面的安全高效回采。针对这种情况,对15210工作面回风顺槽应力影响区顶板采取了“注浆+桁架锚杆+架设双梁T型钢棚”联合支护措施。从实际应用效果来看,采取联合支护措施后控制了应力区顶板下沉现象,保证了工作面安全高效回采。

During the mining period of 15210 working face in Youxianshan Coal Mine passing through F9 fault,under the action of multiple concentrated stresses,such as tectonic stress and mining advance stress,the roof of the return air chute of the working face appears subsidence and breakage,which threatens the safe and efficient mining of the working face.Combined support measures of"grouting+truss bolt+erection of double beam T-shaped steel shed"are adopted for the roof of stress affected area of return air channel in 15210 working face.From the practical application effect,the combined support measures can control the roof subsidence in the stress area and ensure the safe and efficient mining of the working face.