1·By site geologic investigation, the paper evaluates stability of goaf, and takes relevant treatment measures of ground and structure.
通过现场地质勘测，对采空区的稳定性作出评价，并采取相应的地基、结构处理措施。
2·UDEC simulation results show that the porosity of overburden rock fissure field in goaf and its curve is saddle-shaped.
UDEC模拟结果表明，采空区覆岩裂隙区域孔隙率曲线呈鞍状分布。
3·This paper introduces the measure and experiment about how to use earthquake exploration technology in goaf and puts forward some reasonable suggestions in goaf.
介绍了告成煤矿运用地震勘探技术在探测老空区方面的方法及经验，并提出了探测采空区的合理化建议。
4·Through numerical simulation, the characteristics of goaf flow field and gas transportation under J-shape and U-shape ventilation systems were analyzed.
通过数值模拟，对比分析了J型通风和u型通风条件下的采空区流场及瓦斯运移特征。
5·The current progress and development trend in the study of safety theory of field flow in goaf are analyzed.
分析了当前采空区场流安全理论研究的最新进展和发展趋势。