不同护巷煤柱近距离倾斜下保护层开采卸压效果研究

Study on Pressure Releasing Effect of Protective Seam Mining Under Close Inclined Distance of Different Protective Seam Gateway

为了实现被保护层的经济、安全与高效开采,对留设不同尺寸煤柱开采保护层的效果展开研究,通过理论与计算机数值模拟实验发现,采用无煤柱开采保护层时,被保护层的卸压区域连续,并且随着接续工作面的开采,被保护层经历反复卸压作用,卸压更加充分,并据此对近距离下保护层开采巷道布置进行优化,即采用完全无煤柱开采保护层,可实现被保护层的安全、经济与高效开采。

In order to have a economic, safety and high efficient mining of the protected seam, a study was conducted on the mining effect of the protected seam with different setting size coal pillars. The theoretical and computer numerical simulation experiment showed that when a no coal pillar mining applied in the protected seam, the pressure releasing zone in the protected seam was continued. With the mining of the continued coal mining face, the protected seam had a repeated pressure released role and the pressure releasing would be more fully. Then an optimization was conducted on the gateway layout of the underneath protective seam mining with a close distance. Thus a full no coal pillar mining would be applied to the protective seam and a safety, economic and high efficient mining could be realized in the protected seam.