残留煤柱,residual coal pillar
1)residual coal pillar残留煤柱
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.Enlightment from Extracting Residual Coal Pillar in Yangzhuang Colliery杨庄矿在矿井残留煤柱开采中的几点启示
3.Theoretical determination of the section coal pillar"s reserve-width in medium thick coal seam中厚煤层区段煤柱留设宽度理论确定
4.Study on Reasonable Width of Coal and Rock Pillar under Thick Aquiferous Loose Bed;厚含水松散层下煤岩柱合理留设研究
5.Protective coal pillar set method and development tendency in China我国保护煤柱留设的方法及发展趋势
6.A 3D Numerical Analysis of F_2 Fault Waterproof Pillar in Tao Yuan Coal Mine;桃园煤矿F_2断层防水煤柱留设的三维数值分析
7.The discussion about waterproof mine columniationpillar width in Small coal mines bare area小煤窑采空区留设防水煤柱合理宽度的探讨
8.Analysis of Coal Mine Water-filled Conditions Under Thick Cenozoic and Coal Pillar Preserve巨厚第四系下煤矿充水条件与煤柱留设的分析
9.On law of abutment pressure distribution of coal pillar in shallow seam浅埋煤层预留煤柱支承压力分布规律研究
10.Study on Optimization Design and Destruct Monitoring Character of Coal Pillar in Longwall Remaining Coal Pillar Support Mining;长壁留煤柱支撑法开采煤柱优化设计及破坏的可监测性研究
11.The Research of Coal Liquefaction Residue Solvent Extraction and the Characteristics of the Extract煤液化残留物溶剂萃取及其萃取物的特性研究
12.Fluid-Solid Coupling Analysis of the Fault Waterproof Coal Pillar;断层防水煤柱合理留设的流固耦合分析
13.Investigating Reasonable Scale of Pillars for Protecting Workings Lying under Thrust Sheets;推覆体下伏工作面防水煤柱合理留设的研究
14.The Research of Reasonable Setting up Pillar Coal to Prevent Sand from Collapsing in the Moderate and Thick Unconsolidated Formation;中厚松散层下防砂（塌）煤柱合理留设研究
15.Application on Non Coal Pillar Mining for Gob-side Entry Retaining Technology in High Gaseous Mine沿空留巷无煤柱开采技术在高瓦斯矿井的应用
16.Numerical Modeling on Fluid-Solid Coupling for the Waterproof Coal Pillar Design流-固耦合作用下防隔水煤柱留设的数值模拟
17.Discussion on Tertiary Hydro-geological Feature and Pillar Setting in Efflorescent Oxygenized Belt第三系水文地质特征与风氧化带煤柱留设
18.Method of designing protection coal pillar in mine area based on prediction of surface deformation基于地表变形预计的矿区保护煤柱留设方法
相关短句/例句
Recovery of residual coal-column回收残留煤柱
3)Relic Pillar残留矿柱
4)Remnant mining coal column残采煤柱
5)remains props残余煤柱
1.On the basis of analysis present situation of coal market in our country,this paper combines situation of reality mining andremains props,raises necessity and technological way of miningremains props makes forecasting of economical result,proves less investment,fast efficiency and tow costs of production,it is good for turning tosses into profits in coal mine.在分析国内煤炭市场现状的基础上 ,结合五阳煤矿开采实际及残余煤柱情况 ,提出了残余煤柱开采的必要性和技术途径 ,并进行了简单的经济效果预测 ,证明开采残余煤柱投资少、见效快、生产成本低 ,利于煤炭产品销售 ,有利于煤矿扭亏为盈。
6)coal pillars留煤柱
1.Base on the longwall coal mining withcoal pillars applied in the medium and small coal mines in the Shaanbei Coal Field,the technical targets to prevent and reduce the mine disasters are to classify two different featurecoal pillars.针对陕北煤田中小煤矿采用的长壁留煤柱开采,防灾减灾的技术目标是区分两类不同性质的煤柱,即区内煤柱和区域间的隔离煤柱,实现隔离小区域的适时无灾害垮落,防止跨隔离区的大范围垮落。
延伸阅读
井筒煤柱开采随着开采深度的增加,立井井筒和工业广场煤柱(见矿柱) 的压煤量越来越大。过去井筒煤柱一般留而不采；有时在矿井报废前另建提运井巷进行开采，此法不经济；或采用巷道开采方法开采，回采率极低。自50年代起发展利用本井筒开采自身保安煤柱，并保持井筒功能的新技术，首先在德国和比利时试验成功。1960年以后，在波、苏、捷等国又得到进一步发展。特别是波兰，不仅开采了被井筒穿过的煤柱，而且开采了完全位于井筒之下的煤柱；不仅开采了生产矿井的井筒煤柱，而且对在建和新建成矿井的井筒煤柱也进行了开采试验。近十多年来，中国也进行了开采井筒煤柱的试验。如淮南矿区开采了急倾斜煤层井筒及工业广场煤柱。开采井筒煤柱时，井筒会发生下沉、偏斜、水平和垂直方向的拉伸和压缩变形，以及水平方向的位移和扭动。当井筒穿过含水地层时，如处理不当，还会发生井壁漏水现象。目前，波兰首创的"两步开采法"应用较广；第一步开采井筒周围的一小块煤层；第二步在全煤柱范围内用长工作面一次开采（见图）。方法有：①由煤柱一侧向另一侧回采；②由煤柱中心或稍偏离中心处向两侧回采；③由煤柱两侧向中心回采；④由煤柱一侧前后两个工作面跟随向另一侧回采。如井筒位于煤层一侧，可采用条带方法，并在井筒两侧进行等面积或体积的均衡开采，以减少井筒偏斜。开采井筒煤柱前，要对井壁及井筒装备采取防护措施：①挖去穿过所采煤层内的一段井壁，砌以防护木垛；②在罐道、梯子、排水管、压风管及电缆等管线中增设伸缩接头;③为减轻井壁的垂直变形,在所采煤层上、下一定距离的井壁上，应设置木砖压缩层。井筒煤柱范围内的地面建筑物和构筑物的防护方法，见建筑物下采煤。在井筒煤柱不能开采的情况下，有的国家在新井设计中采用加固井壁及工业广场地面建筑物的方法，以缩小深井筒和大工业广场的煤柱尺寸，减少压煤量。
