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。
Analysis on the damage zone of overlying strata and safety layer distance on the upward mining above the longwall goaf
长壁开采上覆岩层损伤范围及上行开采的层间距分析
mined near the earth's surface by stripping.
除去地面的表层开采的。
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。
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
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
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
Application of revolving mining in longwalling irregular thin coal seam in upward mining manner
旋转开采技术在上行开采不规则薄煤层综采面的实践
A study on the application of auger type coal miner in mining methane relieving coal seams with higher gas content
钻式采煤机在高瓦斯解放层开采中的应用探索
Theory study on the load on support of long wall with top coal caving with great mining height in extra thick coal seam
特厚煤层大采高综放开采支架外载的理论研究
On Thin Coal Mining and Application of Plow Coal Technology
我国薄煤层开采及刨煤机采煤技术的应用
Valuable deposits of oil have been found by drilling.
通过钻探发现很有开采价值的油层.
EXPERIENCE ON REDUCTION OF ORE-DILUTION IN MINING A THIN-BED URANIUM DEPOSIT
开采薄层铀矿床中降低贫化率的经验
Establishment of Match Excavation Model of Coal Bed of Kailuan Corp;
开滦集团公司煤层间配采模型的建立
Stability analysis of basic roof in fully-mechanized top-coal caving mining of the steep seam
急斜煤层综放开采中基本顶的稳定性
Numerical Simulation of CO_2 underground Sequestration and Exploitation of Coal Bed Methane
CO_2地下处置与煤层气开采的数值模拟
Mining Technology of Thinner Coal Seam at Yu Jia-liang Coal Company
榆家梁煤矿中厚偏薄煤层的开采技术