The response character of acoustic wave velocity field of coal floor rock mass failure is discussed according to the general principle of floor failure by mining.
从煤层开采引起底板破坏一般规律出发， 探讨了底板岩体破坏与声波速度场的响应关系， 介绍了声波ＣＴ探测的原理与方法， 按采矿活动的关键阶段设计观测方案， 进行了试采面底板破坏深度的动态声波ＣＴ 探测试验。
Effect research for leakage of surface water body in the Yuecheng Reservoir area due to coal mining;
煤层开采对岳城水库库区渗漏的影响研究
Stress path analysing of soil during coal mining;
煤层开采土体应力路径分析
If the coal mining of Huangling No.
依据地质勘探资料,运用水文地质学相关理论,在分析井田水文地质特征及直罗组上段隔水性能的基础上,通过导水裂隙带最大高度计算,得出了煤层开采对水源地无影响的结论,并提出了矿井建设期间应注意的事宜。
In the process of Shanxi formation seam mining in Shaqu Colliery,the seam roof and floor sandrock aquifers constitute the direct discharge aquifers.
沙曲煤矿山西组煤层开采过程中,煤层顶底板砂岩含水层构成煤层开采时的直接充水含水层。
Determination on Fracture Condition of Key Stratum Above Full Thick Seam Mining Face
厚煤层整层开采采场上覆关键层断裂条件判定
The whole area has been mind out.
整个地区已被开采完了。
a pay streak.
含有开采价值的矿层
the part of a coal seam that is being cut.
正在被开采的煤层截面。
mined near the earth's surface by stripping.
除去地面的表层开采的。
flat back cut and fill method
水平分层充填开采法
overhand cut and fill
上行分层采掘充填开采法
Research and Extracting Status of Large Angle and Large Length Coal Seam in China
我国大倾角、大采长煤层开采研究现状
Extremely Thin Protectors Drilling Picks the Craft in Protector Mining Application
极薄煤层钻采工艺在保护层开采中的应用
Research on Maximize Technology of Extraction Mining with Drilling Through Coal Seam in Protective Coal Seam
保护层开采穿层钻孔抽采最大化技术研究
Coalbed Methane Reservoir Numerical Simulation and Its Development Scheme;
煤层气储层数值模拟及开采方式研究
Sudy on the numerical simulation of the overlying strata movement of the far-distance protective coal seam
远程保护层开采上覆煤岩层移动规律
Water Prevention and Control Technology of Seam Mining Under Thin Floor Condition
薄层底板条件下煤层开采防治水技术
Reasonable Mining Height of Full-mechanized Caving Mining in Softly Inclined and Extra-thick Coal Seam
缓倾斜特厚煤层综放开采合理开采厚度的确定
Practice on Mining Method Changing from Top Coal Caving Mining to Top Slice Mining
工作面由放顶煤开采改为顶分层开采的实践
CBM Development and Utilization for Green Exploitation of Coal Mine
开发利用煤层气 实现煤矿绿色开采
Development and Practice of Thin Coal-seam Mining Technology in Kailuan Mining Area
开滦矿区薄煤层开采技术发展与实践
A Research in Drift Layout of Mechanized Coal Face Panels in Gentle Dip,selfcombustible Thick Seams by Slice Mining
缓倾斜易自燃厚煤层分层开采综采采区巷道布置的探讨