块度

Therefore, making a thorough study on the blasting fragmentation distribution is of momentous theoretical and practical significance.

因此，对爆破块度分布进行深入的研究具有重大的理论和实际意义。

Blasthole deviation is composed of three distinct components:collaring, alignment and trajectory deviation.

炮孔偏差严重影响采矿企业的经济效益，过大的偏差造成的不利影响是很明显的，如产生不良的爆破块度、回收率低和矿石贫化。

The height of coal seam, the dispensability and compressibility of broken roof gangue, and the size of the broken block of PKS are the main evaluating factors of water-flowing fracture, which are concerned with the critical distance between PKS location and mining seam.

对导水裂隙带高度产生影响的主关键层与开采煤层临界距离主要与煤层采高、顶板碎胀压实特性、主关键层破断块度等因素有关，可以粗略按7~10倍煤层采高计算该临界距离。

Through similar simulation test of block top-coal drawing, the influence of coal block size and block position in top coal on the recovery ratio and drawing manner is studied. It is found that the drawing manner has the different adaptation to the top coal which has different block distribution. The caving capacity is mainly decided by the block size. The top-coal which has layer difference of block with the same size has different recovery ratio. It is shown, that, to the given top-coal blocks, the recovery ratio of uniformly mixed blocks is maximal in the manner of drawing at interval of one support.

研究表明，顶煤块体大小是影响顶煤回收效果的主要因素，在顶煤块径一定的条件下，块体层位分布不同是造成顶煤回收率差异的主要原因，研究表明各级块度均匀混合时顶煤回收效果最好，块度从下向上增大分布次之，大块为中位顶煤时回收效果最差；各种放煤方式的适应性不同，各级块度均匀混合的顶煤适合用间隔放煤；块度从下向上增大适合用顺序放煤；大块在顶煤中位分布时，中硬煤以下适合用间隔放煤，硬煤应采用顺序放煤方式。

The results indicate that the lumpiness of rock breaking is ideal and it is favoring to clear up dreg without influence on strobe and the surrounding building.

结果表明，爆破后，岩石破碎块度理想，水下清渣顺利，对闸门及周围建筑物无影响。

An experiment was arranged to detect how the lateral pressure changes as the lumpiness and strength of rock block vary during compacting .

通过试验得出松散岩块在压实过程中，侧向压力随岩石块度及岩石强度的变化规律。

Through the study of joints of different sizes in granite mass, it is known that joints not only control lumpiness of granite materials but also provide a good structural environment for weathering of the rock, causing the continuous development of weathering and the deeping of decoloration.

查明节理不仅直接控制石材的块度、荒料率，而且为石材的风化变色作用提供良好的构造环境，促使花岗石风化变色作用的加深及其效果的扩大化。

In order to overcome some difficulties in mechanized kaolin mining, such as the weak roof, hard ore body, high toughness, it is necessary to apply long hole standing shot technology before the mining activity so as to improve the mechanical cutting efficiency and meet the demand of blocks degree.

为了解决煤系高岭土矿机械化开采存在顶板软弱，矿体相对煤炭质地硬，韧性大，矿石块度要求适中等难题，有必要在开采前采用预先对矿体进行充分合理的松动爆破，以提高机械切割效率及满足矿石块度适中的要求。

Based on the fractal characteristics of the blasting fragmentation distribution,the paper derived a relationship between the explosive specific charge and the uniform exponent of the distribution,which is instructive for predicting the fragmentation.

基于爆破块度分布的分形特征，从理论上推导了炸药单耗与爆破块度分布均匀性指数的关系，对爆破块度分布的预测具有重要的指导意义。

Proceeding from the thought of blasted fragments having the fractal characteristics, the calculation of blasted fragment sizes was related to the mechanism of blasting in jointed rock masses by the new concept of "rock mass fracture ratio" presented and , thus, the model of damage mechanics for blasting in rock masses was established, which reflects the blasting essence of both rock masses breaking along joint planes and rock breaking.

从爆破岩块具有分形特征的思想出发，通过提出&岩体破裂比率&概念，将爆破块度计算同节理岩体爆破机制相联系，建立起岩体爆破块度的损伤力学模型，该模型反映了岩体沿节理面破裂和岩石本身破裂的岩体爆破本质。

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。