Development of the ultrasonic measurement technique and its application in the observation of rock mass stability

Summary A method of measuring ultrasonic wave properties in rocks during the complete stress-strain process is described. The relevant experimental laboratory study, to reveal the change of the amplitude spectrum parameters with strain (or stress) has been carried out. A preliminary study was conducted on the application of the ultrasonic measurement technique at a belt conveyor roadway of the north wing in Baodian coal mine, Shandong province. A borehole ultrasonic device with dry coupling was developed to provide better coupling and more accurate measurement data in comparison with those of a water coupled situation. Based on the interrelations between the complete stress-strain properties of specimens and their wave properties, the structural properties of surrounding rocks, the range of yield zones, and the change of stresses within the rocks surrounding a roadway which was subjected to mining influence of upper longwall face were analysed. Amplitude spectrum parameters were used to give a better prediction of the physico-mechanical state of the surrounding rocks.     

类透镜介质中的传导模及与激光束的耦合

从求解柱坐标内亥姆霍兹方程出发，导出了类透镜介质传导模的特征参量、场分布状态及传播常数，求出了入射激光束和导模之间的耦合系数，并讨论了它们的物理意义．     

气压场巨涨落与非线性地震系统状态的突变和临震预报研究（上）

本研究以非线性孕震系统在爆发前夕的外敏性为物理基础，对大气扰动下的岩体失稳突变问题进行了初步的探讨，给出了气─－地耦合的一般表示，并连续分析了云南近３５年来大气压力场演化与场内近百次５级以上地震（内含１９次６级，４次７级）的基本关系，系统地证明了绝大部分强震都是在其上覆大气涨落加剧及与邻区气压梯度增大时突然爆发的，这种自然共性的揭示，既是对理论的认证，也丰富了短临地震预报的科学依据。     

磁层系统的能量输入、输出与日地耦合

用１９７８年和１９８２年３６个磁暴期间的太阳风、行星际磁场（ＩＭＦ）和地磁资料，分析和检验已有的两类太阳风－磁层能量耦合函数．结果表明：Ａｋａｓｏｆｕ提出的耦合函数ε能大致地预报亚暴和磁暴的发生。ε开始起重要作用时即出现亚暴；电离层能耗达到饱和值是发生磁暴的标志。ε与磁层体系能耗之间有接近于对数量的线性关系．用１９７８－１９８６年的资料，分析环电流和极光区电离层能耗在１２１个太阳自转周内的分布表明，日面上可能存在相对持久的活动区域     

Application of stress-pore pressure coupling theory for porous media to the Xinfengjiang reservoir earthquakes

Theory of the coupling of stress-pore pressure in the saturated, elastic porous media is used in the study of the formation mechanism of the Xinfengjiang reservoir-induced earthquakes. Based on the results, it is believed that compared with the mechanism of additional stress in the vicinity of the reservoir, the mechanism of the coupling of additional stress and pore pressure may be more well-founded for the occurrence of reservoir-induced earthquakes.