作者单位:Zhang Zicheng,Zhang Zhanguo(Wulan Coal Mine of Shenhua Ningxia Coal Greup Co.Ltd.,Alasha East Banner,750324,Inner Monglia,China)张自成,张占国(神华宁夏煤业集团有限责任公司乌兰煤矿 内蒙古阿拉善左旗 750324)Li Jinhua(School of Architecture and Civil Engineering,Xi'an University of Science & Technology,Xi'an,710054,Shaanxi,China)李金华(西安科技大学建筑与土木工程学院 陕西西安 710054)