Pressure releasing and gas drainage with long bore hole in roof overburden of fully mechanized caving face 综放面顶板覆岩走向长钻孔卸压抽放瓦斯研究
Parametric analysis is carried out to investigate the effects of soil dilation and overburden pressure on the soil nail pullout resistance. 结果显示，当上覆压力较小时，剪胀角对抗拔应力的影响较小。