caving zone

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 results show that, the overlying coal-rock mass is integrally bending and sinking, without forming any caving zone and the obvious fault zone.

结果表明，在极薄保护层钻采过程中上覆煤岩体产生整体弯曲下沉，没有冒落带和明显的断裂带。

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

地球物理勘探在探测煤矿采空区覆岩两带中的应用

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。

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；

Remining coal seam left in caving zone

浅析开采冒落带内丢煤的复采

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。