摘要
为探究端帮压煤井工开采采高对边坡稳定性的影响,本文通过FLAC3D数值模拟软件,探究采高对临界状态下坡体水平位移、潜在滑移面以及边坡安全系数的影响。结果表明:坡体中最大水平位移均出现在4号煤层与坡面相交处,随着采高的增加坡面监测点的水平位移均有小幅下降;坡体中出现两条潜在滑移面,一条滑面从坡脚处起始后贯穿至,另一条从4号煤层与坡面相交处起始后贯穿至坡顶;边坡安全系数随采高的增加而呈线性规律降低。采高为6m时,边坡安全系数依然大于1.2的中长期边坡稳定性要求,边坡处于稳定状态。因此,该矿可在边坡稳定性要求满足的条件下将9号煤层全部采出。
In order to explore the influence of mining height of end pressure coal on slope stability,this pa⁃per explores the influence of mining height on horizontal displacement,potential slip surface and safety fac⁃tor of slope under critical condition by FLAC3D numerical simulation software.The results show that the maximum horizontal displacement of the slope body appears at the intersection of No.4 coal seam and slope surface,and the horizontal displacement of the monitoring point decreases slightly with the increase of min⁃ing height.There are two potential slip surfaces in the slope body,one slip surface starts from the foot of the slope and the other starts from the intersection of No.4 coal seam and slope surface and runs through to the top of the slope,the safety factor of slope decreases linearly with the increase of mining height.When the mining height is 6m,the safety factor of slope still larger than the stability requirement of 1.2’s medi⁃um and large-term slope,the slope is in the state of stability.Therefore,the No.9 coal seam can be fully mined under the condition that the stability requirements of slope are met.
作者
刘志明
LIU Zhiming(Heidaigou Opencast Coal Mine,Jungar Energy Co.,Ltd.,CHN Energy,Ordos,Inner Mongolia,010300)
出处
《能源科技》
2020年第1期35-38,58,共5页
Energy Science and Technology
基金
国家自然科学基金项目(51774184),露天煤矿高含水煤岩边坡蠕变损伤机理研究。
关键词
端帮压煤
井工开采
水平位移
安全系数
滑移面
End pressure coal
Underground mining
Horizontal displacement
Safety factor
Slip surfac
