作者单位:Song Xiaopeng(Shaanxi Hongshiyan Coal Mine,Yan'an,727307,Shaanxi,China)宋晓鹏(陕西红石岩煤矿 陕西延安 727307)Zhu Bin(School of Architecture and Civil Engineering,Xi'an University of Science and Technology,Xi'an,710054,Shaanxi,China)朱彬(西安科技大学建筑与土木工程学院 陕西西安 710054)