地面钻孔,surface borehole
1)surface borehole地面钻孔
1.Such measures like reducing air-leak in goaf,disposing hole near to return airway,controlling extracting pressure to range from 40 to 60 kPa and space between holes 200 to 300 m and so on are useful to promote the efficiency ofsurface borehole.通过对比研究淮南矿业集团各矿区试验钻孔抽采数据,在明确地面钻孔抽采瓦斯机理的基础上,运用理论分析及数值模拟的手段,分析总结了地面钻孔抽采采空区瓦斯效率的影响因素,并针对具体影响因素提出了提高钻孔抽采效率的相关建议。
英文短句/例句
1.Gas Drainage Technology of Goaf with Boreholes from Surface Ground of Tangshan Mine唐山矿地面钻孔抽放采空区瓦斯技术
2.Study on Technology of Surface Drillings Draining Pressure Relief Gas of Coal Seam by Protected;地面钻孔抽采被保护层卸压瓦斯技术研究
3.Influencing factors to extraction efficiency of surface goaf hole地面钻孔抽采采空区瓦斯效率影响因素
4.Study on the Law of Movement and Distribution of Gas in Semi-enclosed Goaf on the Condition of Surface Hole Drainage;地面钻孔抽采条件下半封闭采空区瓦斯运移及分布规律研究
5.Study on the Law of Movement and Distribution of Gas in Goaf on the Condition of Surface Hole Drainage地面钻孔抽采条件下采空区瓦斯运移及分布规律研究
6.Research on Controlling of Coal Mine Reserves and Border of Recoverable Coal Boundary By Ground Drilling Hole利用地面钻孔对矿井储量及煤层可采边界的控制研究
7.Drill three holes in the floor/base plate for anchoring the leg.在地面/底板上为锚固支柱打钻三个孔。
8.Delaunay Triangulation of Geological Body Surfaces Based on Borehole Data基于钻孔数据的地质面Delaunay三角剖分
9.A hole with the top part enlarged so that the head of a screw or bolt will lie flush with or below the surface.埋头孔顶部扩大的孔，为使钻或螺栓的头与地面相平或在地面以下
10.When it has been decided where we are going to drill, we put up at the surface an oil derrick.决定了钻孔位置后，我们就在地面上竖起井架。
11.Accident Treatment of Boring in Air Shaft Ground Pre-grouting in Yangcun Coal Nine杨村煤矿风井地面预注浆工程钻孔内事故处理
12.spotfacing and centering machine平端面钻中心孔机床
13.When it has been decided where we are going to drill,当确定钻孔地点后，
14.Just over a hundred years ago men began drilling holes near the places where oil was seen seeping out of the ground .恰恰在一百年前，人们开始在看来有石油渗出地面的地方附近钻孔。
15.On application of DTH drill in drilling pile construction in karst developing areas潜孔钻在岩溶发育地区钻孔桩施工中的应用
16.Analysis of Dependence Relation of GPR and Core-drilling Used in Pavement Thickness Detection探地雷达与钻孔取芯在路面厚度检测中的相关分析
17.Modeling research on horizon interface with arbitrary boundary by B-Rep based on bore-hole data基于钻孔数据任意边域地层分界面B-Rep建模研究
18.Research on Three-Dimensional Geological Modeling Method Based on Drilling Data and Constraints of Intersected Folded Cross-Sections基于钻孔数据和交叉折剖面约束的三维地层建模方法研究
相关短句/例句
surface vertical borehole地面垂直钻孔
3)Drilling geological section钻孔地质剖面
4)Surface hole extraction地面钻孔抽采
5)drilling hole on conical surface锥面钻孔
6)drilling on inclined surface斜面钻孔
1.A comparative study of the thrust force at initial stages ofdrilling on inclined surfaces was conducted through experiments.分析模型合理地解析了斜面钻孔初期的受力现象。
延伸阅读
地表钻孔抽水地表钻孔抽水dewatering through welld{bjoo之uankong ehoushu}地表钻孔抽水(dewatering through well)为了解除矿区地下水害威胁，在地表矿区边界之外的来水方向上围绕矿体开凿若干个大直径钻孔，在钻孔内安放深井泵或潜水泵排水，使矿区开采地段处于疏干降落漏斗水面之上的疏干方法。钻孔布置见矿山深井降水孔平面图。钻孔直径D可按公式D一d十50+2了尸·、’· 户。’\。。/望‘，卜’。户)’力价/{/。一、\匕一办’\矿山深井降水孔的平面图l一来水方向;2一抽水钻孔; 3矿区;4一隔水层(a十b)计算。其中d为水泵的最大外径，mm;。为过滤管的厚度，mm;b为充填料的厚度，mm。地表钻孔抽水疏干在地表进行，施工简单、方便，劳动条件好、施工管理容易，钻孔的布置及疏水设备的迁移都比较灵活。因此，在条件允许的情况下，应该尽量采用地表钻孔抽水，疏干矿床。 (张福有)
