roof caving的例句大全

stability monitoring of immediate roof in fully-mechanized top-coal caving face with high output and high efficiency

高产高效综放工作面直接顶稳定性监测

modelling experiment for immediate roof with many cracks caving in longwall face

采场多裂隙直接顶破坏的模拟研究

the monitored results of roof separation have indicated that the anchor way and the anchor parameters provided by this paper can effectively control the roof deformation and caving of large cross section open-off cut with thin bed compound roof.

顶板离层监测结果表明，所提供的锚固方式与锚固参数能够有效控制薄层状复合顶板大断面开切眼的顶板变形与冒落。

Analyses factors that affect cover caving ability of roof coal in sublevel caving mining method.

分析了放顶煤开采顶煤冒放性的影响因素.

The caving of thick and strong roof stratum, key stratum, causes tremendous rock pressure in mine.

采场上覆岩层中的厚硬岩层, 即厚硬关键层, 其冒落会造成剧烈的矿山压力显现.

This paper approves the importance in producing minimum vibra-tion energy during the broken of stiff sandstone roof in working of stress releasing seams by caving method.

论文证实了用垮落法开采卸压层使坚硬砂岩顶板折断时产生的振动能为最小的要义。

The primary target of the monitoring is to dynamically determine the developing regularity, and heights of the" two zones"( caving zone and fractured zone) in roof rocks.

该监测的主要目的是动态测定煤层开采过程中顶板岩石两带（冒落带和裂隙带）的发展规律和高度，以指导相邻采区留设合理的防水或防砂煤柱。

The Technology Study of Roof Coal Presplitting in Thick Seam Caving Coal Mining

厚煤层放顶煤开采顶煤预裂技术研究

Practices on fully mechanized caving technology in thick seam with hard roof

坚硬顶板较厚煤层综采放顶煤工艺的实践

In Fully Mechanized Caving, the motion of the cover roof and its rock pressure phenomenon is comparatively violent for the greatly thickness extracted of coal seam in one time.

综放开采法一次采出厚度大，工作面顶板运动及其矿压显现也相对剧烈。

A Caving Blast Test with a Detonating Fuse over the Tough Roof of a Group of Steep Coal Seams

急倾斜煤层群坚硬顶板导爆索爆破放顶试验

Study on Mechanism of Induced Caving Roof and Control of Its Secondary Catastrophe Chain Effect

顶板诱导崩落机理及次生灾变链式效应控制研究

Roof falling mechanism of face area in fully-mechanized sub-level caving mining face and its control

综放工作面端面冒顶机理及控制

Elastic analysis of suspended triangle roof plate with curve side on the end of sub-level caving mining face

放顶煤工作面端头“弧三角形悬板”的弹性分析

The paper introduces development, structural features, working principle, application. operating conditions and prospect of market of suspension roof timber hydraulic support for caving method.

介绍了ZHF型放项煤悬移顶梁液压支架的发展过程、结构特点、工作原理、应用方法、使用条件及市场展望。

Artificial Caving Technigue for Limestone Roof Above the Confined Water

承压水上泥灰岩顶板人工放顶技术