查询词典 rockbolt

The diameter of the rockbolt also has an effect on the mechanical properties. The larger is the diameter, the larger is the increasing of the moduli of the rock mass, but variation of the equivalent elastic constants are little.

锚杆直径增大而其他参数保持不变时，岩体锚杆支护系统复合材料的力学性质弹性模量随着直径的增大而有所提高，但等效强度常数变化幅度较小。

A high-strength steel pipe rockbolt has an expansive rockbolt main body prepared by processing a high-strength steel sheet of 1.8-2.3 mm in thickness with tensile strength of 490-640 N/mm 2 and elongation of 20% or more to a welded pipe and roll-forming the welded pipe to a shaped pipe having one or more concavities extending along an axial direction.

高强度钢管锚杆具有可膨胀锚杆主体，该主体通过下列步骤制成：将抗拉强度为490～640N/mm 2 ，伸长率为20％或更大，厚1.8～2.3mm的高强度钢板加工成焊接管，再将该焊接管滚轧成型成具有一个或多个沿轴向延伸的凹部的异形管。

Characteristics of wave propagation in grouted rockbolt were investigated with numerical simulation, experimental measurement and theoretical analysis.

用理论分析、数值模拟和实验测试的方法研究了自由锚杆和锚固锚杆中的波传播特性。

Research results show that when the frequency of excitation signal is within 10kHz to 100kHz the wave in free bolt and grouted rockbolt is guided wave which is related to its boundary conditions. Waves with different frequencies have different velocities.

研究结果显示在测试激发波的频率范围内(10~100 kHz)，锚杆中传播的波是一个和边界条件相关的导波，不同频率的波在锚杆中传播的速度不同。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。