作者单位:NING Fang-bo(Shaft Building Research Institute of the Tiandi Science and Technology,Beijing 100013, China; National Engineering Laboratory for Deep Shaft Construction Technology in Coal Mine ,Beijing 100013, China)宁方波(天地科技建井研究院,北京 100013;煤矿深井建设技术国家工程实验室,北京 100013)