下部煤层,downward coal seam
1)downward coal seam下部煤层
1.Stress concentration due to overlying strata weight on pillar will makedownward coal seam mining difficult.应用Wilson煤柱设计理论公式和三向应力状态下的极限平衡条件,以王封煤矿为实例,分析了刀柱采煤法开采后留设煤柱的弹塑性变形区,计算了煤柱承受的极限载荷,得出该矿8号煤层刀柱采煤法留设的煤柱实际承受的荷载小于其所能承受的极限荷载,煤柱处于稳定状态,上覆岩层在煤柱上产生应力集中现象,对下部煤层开采造成较大的困难。
英文短句/例句
1.Failure Characteristic of Residual Coal Pillar and Its Influence on Downward Mining残留煤柱破坏特征及其对下部煤层开采影响
2.Abstract: The Chengzhuang Coal Mine is threatened by the underground water when the strata is mined.文摘:成庄井田为新建矿井，下部煤层开采受地下水的威胁。
3.Shale underlies coal.页岩层在煤层之下。
4.He moved the coal cakes away, and there was only coal dust left on the floor.他把煤饼搬走了, 地下只剩下一层煤末。
5.Coal seam correlation and characters of coal seam in eastern depression of Liaohe basin辽河盆地东部凹陷煤层对比及煤层发育特征
6.Power Supply Plan for Thin-layers in Fully-mechanized Mining煤矿井下薄煤层综采工作面供电方案
7.New Research on Overlying Coal Seam Effects Induced by Nether Super-thick Coal Seam Exploitation in Coal Group煤层群下伏特厚煤层综放开采对上覆煤层影响的技术探讨
8.Coal Quality Characteristics of Hongxiugou Group in Northern Coal Bearing Stratum of Hongxiugou Basin红锈沟盆地北部含煤地层红锈沟组煤层煤质特征
9.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
10.Detector of Coal Seam Roof Strata Based on S3C44B0X Framework基于S3C44B0X构架下的煤层顶板岩层探测器
11.Deep "three soft" measures inclined roadway open seam of cosl-process research of technologies深部“三软”煤层斜井措施巷揭煤防突技术研究
12.Simple Analysis of Coal-Accumulating Laws of Coal-bearing Stratum of Hongxiugou Formation in Northern Part of Hongxiugou Basin红锈沟盆地北部含煤地层红锈沟组聚煤规律
13.Study on the Coal Pillar Stability of Deep and High Seam Strip-Partial Mining and Its Impact on the Village in Gucheng Coal Mine;古城煤矿深部厚煤层条带开采煤柱稳定性及对村庄的影响研究
14.Research on Reasonable Size of Steeply Dipping Seam Strip Coal Pillar under Village;村庄下大倾角煤层条带煤柱合理尺寸研究
15.Technical Study on Leading Exploitation Underground Coal Bed Methane in Coal Mine-scale;煤矿区的井下煤层气超前开发技术研究
16.STATUS AND PROBLEMS OF DRAINAGE AND UTILIZATION OF DOWNHOLE COALBED METHANE IN COAL MINES IN CHINA;我国煤矿井下煤层气抽采利用现状及问题
17.Evaluation of Reserves of Coal Bed Methane in Lower Permian Coaliferous Formation in Luoyang Region;洛阳地区下二叠统二_1煤煤层甲烷资源评价
18.Research into Undersea Coal Seam Spontaneous Combustion Prevention Technology at Beizao Coal Mine北皂煤矿海下开采煤层自然发火防治技术研究
相关短句/例句
underlie coal seam下伏煤层
1.To solve the difficulties of mining the coal seams underlie the-115 main entry without destroying the main entry in the Quangou coal mine,the simulation analysis of surrounding rock movement regularities of the main roadway with theunderlie coal seams mined was carried out.针对泉沟煤矿要采出-115大巷下压煤,同时要保证上部的大巷正常使用的技术难点,进行了下伏煤层开采大巷围岩活动规律的模拟分析。
3)underlying coal bed下卧煤层
1.Study on structural stability of deep buried highway tunnel withunderlying coal bed exploiting;采动下卧煤层对深埋隧道结构稳定性的影响
4)underground coal seam地下煤层
1.This paper introduces the working principles of high density resistivity method and the field work method,probes into some problems that should pay attention to in detecting the multi-layer goaf by using the high density resistivity method,and expounds the concrete steps of detecting the multi-layer goaf ofunderground coal seam.介绍了高密度电阻率法的工作原理及野外工作方法,探讨了应用高密度电阻率方法探测多层采空区时应注意的问题,阐述了探测地下煤层多层采空区的具体步骤。
5)slicing coal下煤分层
6)deep coal bed深部煤层
1.Measures for preventing and controlling gas indeep coal bed;深部煤层瓦斯治理综合防治措施
2.Thedeep coal bed in Xingbei is one of the best targets to exploit availably with large reserve and medium burial depth.通过对河北省邢北煤田深部含煤岩系进行重点研究,阐述深部煤层的分布特征和赋存规律,深部煤层变质作用对煤质的影响,主要煤层的岩相古地理特征及聚煤规律,初步评价了邢北深部煤炭开采地质条件。
3.In the paper,the mechanical mechanism of gas Emission is revealed by the force analysis of surrounding coal of deep vertical shaft and the research on ground pressure and gas pressure during vertical shaft crossingdeep coal bed.通过深部立井围煤的受力分析,以及地压和瓦斯压力的研究,揭示了立井穿越深部煤层时瓦斯突出的力学机理,对于含瓦斯煤体的结构提出了不同与过去观点的气球爆炸新假说。
延伸阅读
下部下部解剖名。出汉·张仲景《金匮· 百合狐■阴阳毒病脉证并治》，特指前后二阴。
