Application of determing the caving zone and the water flowing fractured zone in the cover strata of mine goaf by geophysical prospecting methods

Therefore, it is foundation of coal mining and design to provide accurate information of caving zone and water flowing fractured zone before and after mining.

准确地提供采煤前后顶底板岩层冒落带高度、导水裂隙带高度及其形态变化等信息，是安全采煤可行性研究和设计的基础。

Remining coal seam left in caving zone

浅析开采冒落带内丢煤的复采

The height of the watering fissures is 21.5m because the height of caving zone is about 10m after the mining of all the 3 seam ( 4 layers), and the result basically accord to the result of theoretic calculating and numerical simulation;

3煤层全采后（4个分层）垮落带高度为10m左右，导水裂隙带的高度为21.5m，与理论计算和数值模拟结果基本一致；

Through theoretical analysis and laboratory tests the main conclusions of research is as followed: It is effective to implement back filling technique in caving zone and breaking zone, control overburden rock mining subsidence, eliminate surface subsidence and protect the safety of the surface buildings.

通过理论分析和实验室试验，得出：实施垮落带和裂隙带注充技术可有效的控制覆岩采动下沉，消除地表沉降，保护地表建筑物、构筑物的安全。

The large scale Ω caving bank at the middle and lower reaches of the Yangtze River frequently threatens the safety of the flood control, and the lives and properties of the people along the both banks.

长江中下游河道大尺度的窝崩，常常危及两岸江堤的防洪安全，给人民生命财产造成较大的危害。

Analysis of Complex Roof Caving Process in Mining by Caving Method

崩落法开采时复杂顶板的崩落过程分析

Technology and control of first roof caving in coal working face

采煤工作面初次放顶的技术与管理

Roof caving is one of the most serious engineering disasters in underground mining activities of metal mines. It not only delays the progress of production, but also threats against underground workers.

顶板垮落是金属矿山地下开采中严重的工程灾害之一，它不仅影响采矿进度，同时也对井下作业人员生命安全构成威胁。

The fracture of overlying key stratum results in decrease of the roof caving angle and the increase of periodic caving span and weighting intensity.

覆岩关键层的破断使工作面顶板垮落角减小、周期垮落步距和来压强度都增大。

A study on ore drawing and computer-based production scheduling in block caving method

自然崩落法放矿与计算机排产方法的探讨

Computer method for draw control in block caving mine

崩落法放矿控制的计算机方法

On Ground Pressure Control Method in Block Caving

自然崩落法地压控制方法探讨

Two step Drawing Research on Block Caving with Floor Pillar System

有底柱阶段崩落法的两步骤放矿研究

These results can be used as theoretical basis for design and practice of block caving.

为自然崩落法的设计与实施提供理论依据。

Present Status of Block Caving Development and Its Application Prospect in China

我国自然崩落法发展现状与应用展望

Ennis stood as if heart-shot, face grey and deep-lined, grimacing, eyes screwed shut, fists clenched, legs caving, hit the ground on his knees.

埃尼斯的心被狠狠地击中了。他面如死灰，表情扭曲，闭上了眼睛。双拳紧握，两腿一软，重重地跪在地上。

Gob of sublevel caving will not cause ground surface downgoing.

崩落法开采形成的空区不会对地表造成沉降危害。空区不用处理，可以任其冒落；

Based on the above analysis, we draw the following conclusions: 1 、 The main deformation zone is located to the uplift in the leading edge and the tensile cracks and caving ground in the middle and rear end of the slip mass.

综合以上分析研究，得出以下几个结论：1、爬家岩滑坡主要变形区域位于滑体前缘的隆起和滑体中、后部的拉裂缝及陷落区，其变形模式为滑移&拉裂型。

This article is aimed at researching low pressure complex caving ground in Jilin area, studied mechanism of formation instability, analyzed through X-ray diffraction mineralogical analysis and SEM imagery structural analysis.

本论文针对吉林油田低压复杂易坍塌地层，对地层的失稳机理进行研究，通过X&射线衍射矿物分析，扫描电镜成像结构分析等实验对易坍塌地层进行分析。

Caving properties and law of ore in block caving

自然崩落法矿岩崩落特性及崩落规律