单组份聚氨酯炮孔填塞剂应用性试验

炮孔填塞是爆破施工过程中的一个关键环节,也是践行精细爆破设计理论的重要措施。传统的炮泥填塞存在着诸多不足,为此,研制了以聚氨酯为基材的TK炮孔填塞剂,通过大量基础性能研究和隧道现场工业性试验,论证了其作为炮孔填塞材料可降低炸药单耗,提高单循环进尺和炮孔利用率,减小空气冲击波、爆破噪声等有害效应的影响,且是安全可靠的。TK炮孔填塞剂优良的填塞效果、方便快捷的施工方法及显著的经济效益,方便于在爆破工程中推广应用。     

“采内放外”新型采煤工艺及装备的试验研究

本文针对回坡底煤矿的煤层实况,设计了短壁大采高"采内放外"新型采煤机。1506工作面工业性试验结果表明:"采内放外"采煤工艺及装备具有采高大、装机功率小、产量大、设备投入低、块率高等突出优点,适用于中小型矿井短壁工作面开采和不规则块段煤炭资源的回收。     

扩孔锚管支护技术及其应用

叙述了扩孔锚管支护技术的施工工艺及施工要点。结合工程实践证明采用扩孔锚管支护技术,可以解决在饱和的可液化的粉土(粉砂)及软塑～流塑状的淤泥质土(淤泥)中,采用钻进方法成孔时易塌孔、埋钻及缩颈等技术难题。     

关于单车试验测定制动缸压力方法的探讨

分析目前单车试验过程中测定制动缸压力的方法不够妥当,不能准确反映制动缸的压力,同时提出改进建 议。     

黄油和粉煤灰在混凝土抗渗试验中的应用

根据作者工作经验，介绍了用黄油和粉煤灰代替石蜡和松香作密封材料进行混凝土抗渗试验，密封效果更好，工作效率更高。     

计算机的图表向导在土工试验图件中的应用

利用计算机的图表向导制作土工试验的各种试验图件,完成土工试验图件制作的自动化.详细介绍利用图表向导绘制土工试验的各种图件,完成计算机绘图的自动化.     

低应变配合静载测试在基桩检测中的应用

结合工程实例，论述了低应变检测配合静载测试的必要性及应注意的问题，着重介绍了对缺陷桩承载力的检测过程及分析思路。     

Research on product size and grinding dynamics of vibration mills

In order to improve vibration mills grinding effect and increase productive efficiency, prime factors of vibration mills were gained much attention. The purpose of this study is to reveal product size distribution and grinding dynamics of vibration mills by orthogonal experi-ments. The metallurgical refractory materials were used as research object. In order to explore the relationships between grinding effect and primary factors, lots of milling experiments were carried out. Based on the results, the conclusions can be summarized： as time runs, the size distri-bution shows exponential trend, and range becomes more and more narrow. Also the quantitative analysis result between grinding effect and primary factors was obtained by non-linear regres-sion： high frequency, high amplitude and low fill ratio can increase grinding speed.