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- Movement Rule of Top Roof and Top Coal in Horizontal Section Caving Mining in Deeply Inclined Thick Coal Seam 急倾斜厚煤层水平分段放顶煤开采顶板和顶煤运移规律研究
- Coal Caving Rule Research of Horizontal Section Caving in Deeply Inclined Coal Seam with DEM Simulation 急倾斜水平分段放顶煤放煤规律的离散元模拟研究
- horizontal section caving 水平分段放顶煤
- The movement of top coal and top roof is discussed with the data observed from the caving mining of deeply inclined thick coal seam with horizontal section in Zhaogezhuang colliery of Kailuan Group. 就开滦集团赵各庄矿在急倾斜厚煤层采用水平分段开采过程中的现场观测，探讨顶煤和顶底板运移。
- horizontal section top coal caving 水平分段放顶煤
- horizontal section top-coal caving 水平分段放顶煤
- An ordinary horizontal well consists of vertical section,curve section and horizontal section. 普通水平井轨迹由三部分组成：直井段，造斜段，水平段。
- This method, compared with horizontal section and vertical section, has smaller jobs, simpler calculations and more accuracies in the room work. 该方法与水平断面法和垂直断面法相比，内业工作量小，计算简单，精度可靠。
- When horizontal section is short, the water coning is formed in a short time, the two shoulders of the coning are steep and the oil/water interface deforms greatly. 采用水平井开发时，由于水平段较长，油藏内井筒附近生产压差较小，底水形成水脊，水脊脊进速度慢，见水时间推迟，提高了无水期产油量。
- This paper studies systematically the effects of wellbore diameter, wellbore trace, horizontal section length and eccentricity on production of horizontal well. 系统分析了水平井井眼尺寸、井眼轨迹、水平井水平段长度和偏心距对水平井产量造成的影响。
- top coal caving in horizontal sectional seam 水平分段放顶煤
- horizontal sectional top coal caving 水平分段放顶煤
- The place that in a way of eyebrow tail section caves is cavity of traditional stringed and woodwind instrument. 眉尾部分稍稍凹陷的部位就是丝竹空穴。
- In CTVE via A,B and C points,the indication rates of the malleus,the indus, the drum cape,the canalis facialis horizontal section,and the prominence of horizontal semicircular canals were prosperously 100%. 40例正常志愿者经选择的A、B、C点入路行CTVE中,锤骨、砧骨、鼓岬、面神经管水平段和外半规管隆凸显示率均为100%25;
- great section cave dwelling room 大断面硐室
- Radial horizontal well is the most complicated one in horizontal well series,it has a major horizontal section and one or several branch sections. 辐向水平井是水平井系列中的高难度井，它除了有一段水平井段外，还有另外一条或多条分支井段。
- Because of long chain couple helix composition of XC, XC can drag reduction, make drilling fluid keep disturbed flow condition in horizontal section, and stop cutting bed formation. XC的长链状双螺旋结构使其具有减阻作用,使钻井液在水平段始终处于紊流状态,阻止了水平段岩屑床的形成;
- ERD wells are widely adopted due to its great economic benefits and its applicability fur special purposes, while the drag along the horizontal section has limited the promotion of ERD wells. 摘要大位移井技术因其具有巨大经济效益并能够满足特殊作业的目的而得以迅速推广应用，但水平井段摩阻扭矩又成为了制约大位移井推广应用的关键因素。
- The vertical line meets the horizontal one here. 垂直线与水平线在此相交。
- Rock movement law of horizontal section top coal caving in steep seam 急倾斜水平分段放顶煤开采岩移规律
