不同帮锚杆参数对煤巷支护效果的影响研究

Study on the Effect of Different Gang Anchor Parameters on the Support Effect of Coal Tunnel

为改善矿井巷道的应力状态,提高煤巷围岩的稳定性,在对强帮强角锚杆支护研究的基础上,分析不同帮锚杆横截面积、帮锚杆长度及帮锚杆角度对煤巷支护效果的影响。结果发现:帮锚杆横截面积和长度对加强煤巷帮部支护强度的作用依序增大;而当帮锚杆倾斜向上的角度从0°增加至45°时,顶底板及左右帮位移变化呈现先减小后增大的变化趋势,且该区间存在相对最优角度值。

In order to improve the stress state of the mine tunnel and the stability of coal tunnel surrounding rock,the effects of different gang anchor cross-sectional area,gang anchor length and gang anchor angle on coal tunnel support were analyzed based on the study of strong gang and strong angle anchor support.The results showed that:the cross-sectional area and length of gang anchor increased in order to strengthen the support strength of coal mine;and when the angle of gang anchor tilted upward increased from 0°to 45°,the displacement of top and bottom plate and left and right gang showed a trend of decreasing and then increasing,and there was a relative optimal angle value in this interval.