Research on Surface Deformation with Increasing Mine Depth、Research on bottom anchor supporting technology in donghai coal mine roadway、Study on Simulation of Deep Roadway Support Effect based on Mechanics Analysis and Material Properties、深部巷道围岩破坏机理及支护研究、高应力软岩巷道支护模拟研究、大采高回采巷道围岩塑性区分布研究、深部巷道底鼓控制技术研究、煤柱下回采巷道矿压的显现规律、放顶煤工作面液压支架的适应性等等