查询词典 caving

The ground pressure behavior anomaly in fully-mechanized top-coal caving working face is a trans-normally and detrimentally dynamic pressure phenomenon.

综放采场矿压显现异常是发生在综放采场的超出常规预计、对安全生产造成较大危害的动压现象。

The author systematically studies the distributive Law of front abutment pressure and its main influential factor in Top-coal caving face by analysing theory,experimenting similar model,and observing spot.

运用理论分析、相似模型实验和现场实测，系统研究了放顶煤采场前支承压力的分布规律及其主要影响因素，得出支承压力表达式( 3)、( 7)是可信的，塑性区宽有利于顶煤压裂，峰值低影响硬煤冒放，放顶煤一次采厚是有限

The process of ore- drawing in block caving is completed under overburden.

自然崩落法放矿基本上都是在覆盖岩层下进行的。

Not only for obtaining practical application but also to providing theoretical basis of ore drawing, a combined conceptive model of column drawing and MMVD has been resulted which is applied for the ore drawing simulation of high level block caving production management.

为了便于实际应用，又具有理论依据，提出了柱状体与改进的空位扩散模型的组合概念模型，该模型可应用于高阶段矿块崩落法放矿生产管理的放矿仿真中。

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。

Hetian half-cooked at an altitude of 3500-5000 m-high rock, the stripping solution for a long period of weathering fragments of different sizes, caving in the hillside, and then washed into the river by rain.

和田玉夹生在海拔3500米至5000米高的山岩中，经长期风化剥解为大小不等的碎块，崩落在山坡上，再经雨水冲刷流入河水中。

In this design four-bar the position puts against coal powered support ZFS10000/25/45. It consists of canopy, base plate, caving shield, hydraulic legs, front and rear lemniscate bars and so on.

本次设计的四连杆中位放顶煤液压支架ZFS10000/25/45，有顶梁、底座、掩护梁、立柱、前后连杆等几部分组成。

Based on specific requirement for the top-coal caving mining to the four-bar linkage ,a design method of the four-bar linkage is put forward in the paper in which the least difference function between the lemniscate locus and the power function curve is used as the main objective function.

基于综放工艺对支架四连杆机构的特殊要求，首次提出以双纽线与幂函数曲线之差值最小作为主要目标函数的数学模型，并在此基础上应用VisualBasic5 0编制了四连杆机构的优化设计程序，可以同时实现优化参数显示与优化结果的动态显

During course of in situ stress measurement, some problems such as core discing, minification and caving of borehole due to horizontal stress are appeared, and their mechanism is studied.

在现场地应力测量过程中发现了岩芯饼裂、钻孔径缩和钻孔破碎塌孔等现象，分析了这些现象的力学机理。

In the induction caving roof, the quantitative inspection have been done by the digital digital panoramic borehole camera system. The quantum study are applied to inspecte the crack occurrence and width from the corresponding relation between 3-D image and its spatial coordinates. And the system provide the method to calculate, account and analysis of the crack parameter.

采用数字式全景钻孔摄像系统宏观探测顶板围岩在耦合诱导致裂失稳崩落的裂隙形态，从裂隙的三维图像与空间坐标关系，对裂隙的产状、隙宽和迹长等参数进行了定量的数字化探测、处理与还原。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。