坚硬顶煤,hard top coal英语短句,例句大全

坚硬顶煤,hard top coal
1)hard top coal坚硬顶煤
1.To make out the distributing character of joint and crack、chang of crack and breakage developing process of top coal with advancing of workface to hard top coal of coal seam No.为了查明保德煤矿8#煤层坚硬顶煤内节理、裂隙的分布特征,及裂隙的变化和顶煤破坏随工作面推进的发展过程,在88203工作面前方布设两个观测孔(煤孔S1和煤孔S2),采用LB钻孔数字摄像仪探测,记录节理、裂隙的发育、发展情况。

英文短句/例句

1.Basic Study on Technology of Pre-blast Weakening Hard Top-coal in Fully Mechanized Caving Faces;综放开采坚硬顶煤预先爆破弱化技术基础研究
2.Test on Hard Top Coal Pre-Blasting and Weakening for High Gassy Fully Mechanized Top Coal Caving Mining Face高瓦斯综放面预先爆破弱化坚硬顶煤试验
3.Application Study on Pre-Weakening Hard Top-coal in Fully Mechanized Caving of No.1 Honghui Coal Mines;红会一矿综放开采坚硬顶煤预先弱化技术应用研究
4.Research on the Top Coal Caving and Drawing Characteristics of Caving Roof Coal Mining for Shallawly Buries and Hard-Thick Coal Seam;浅埋藏坚硬特厚煤层放顶煤开采顶煤冒放性研究
5.Study on Technology of Hard and Thick Top-coal Weakening in Fully Mechanized Caving Faces in Binchang Mining District;彬长坚硬厚煤层综放开采顶煤弱化技术研究
6.Plowability of plow mining on thin and soft coal seam with hard roof坚硬顶板松软薄煤层刨煤机开采可刨性研究
7.Rock pressure of high angle thick coal seam by numerical calculation大倾角坚硬顶板厚煤层矿压规律数值计算
8.Determination of Pressure Step for Hard Roof at XV2306 Working Face in Wangtaipu Coal Mine王台铺煤矿XV2306工作面坚硬顶板来压步距确定
9.Study and Application on Stability of Hard and Massive Overlying Strata in Fully Mechanized Sublevel Caving Face;综采放顶煤采场厚层坚硬顶板稳定性分析及应用
10.Study on the Reasonable Retainning of the Waterproof Coal Pillar of Steep Medium & Thick Coal Seam with Hard Roof;急倾斜坚硬顶板中厚煤层防水煤柱合理留设研究
11.Research on the Tunnel Supporting and Propriate Coal Wedre Preserving under the Provide of the Upper Plate of Qiling Coal Mine;七岭煤矿坚硬顶板条件下巷道支护及合理煤柱留设研究
12.The first caving roof sections in hard coal layers can effectively reduce the pressure during the course of caving and guarantee safe production and efficiency.坚硬煤层顶板分段初次放顶,能够有效缓解放顶期间的顶板压力,保证安全生产,提高生产效率。
13.Gas Control in the Upper Corner of Working Face under Hard Roof坚硬顶板条件下大采高小煤柱回采工作面上隅角瓦斯治理
14.Hard roof prone to bump coal seam:regularity of electro-magnetic radiation,its prediction and application坚硬顶板易冲击煤层电磁辐射规律及其预测应用
15.Study the technique of caving hanging roof in the condition of hard roof of room-and-pillar mining.;房柱式开采坚硬顶板条件下悬顶放顶技术研究
16.STUDY OF CONTROL CAVING METHODS AND REASONABLE HANGING ROOF LENGTH ON HARD ROOF坚硬顶板控制放顶方式及合理悬顶长度的研究
17.The technology experience and economic result of strong and difficult collasp roof manage in Xinan Coal Mine are introduced.介绍了新安煤矿在坚硬、难放顶板管理方面的技术经验及取得的主要技术经济效果。
18.Research on Equipments Coordination for Shearer in Soft Coal Thin Seam with Hard Roof硬顶软煤薄煤层滚筒采煤机设备配套研究

相关短句/例句

hard top-coal坚硬顶煤
1.Study for macro-damage degree of weakening blast in hard top-coal;坚硬顶煤弱化爆破的宏观损伤破坏程度研究
2.Distribution characteristic of breaking extending area of weakening-blast in hard top-coal;坚硬顶煤弱化爆破的破坏区分布特征
3)top hard coal坚硬顶煤
1.The control parameters of strata stress field in pre cracked top hard coal bed are researched using water fracturing under controlling of strata stress field, and the relationship between water seepage, expanding in occlude type of top coal crack and strata stress value is analyzed in this condition.对坚硬顶煤预裂中存在的问题 ,采用在地应力场控制下水力压裂的方法 ,研究了煤层地应力场控制参数。
2.The technology soften the mechanic property of top hard coal effectively.该方法有效地软化了陈家山矿坚硬顶煤,煤块度明显下降,顶煤回收率提高了23%。
4)hard top-coal(roof)坚硬顶煤(板)
5)Hard roof and hard seam坚硬顶板与坚硬煤层
1.Fully mechanized coal caving mining technology with conditions of hard roof and hard seam in Datong Mining Area;大同矿区坚硬顶板与坚硬煤层条件下综放开采
6)hard roof坚硬顶板
1.Numerical Simulation of hard roof processing step;坚硬顶板处理步距的数值模拟
2.Numerical simulation of moving features of hard roof with three-dimensional discrete element method and nonlinear dynamic analysis;坚硬顶板运动特征的数值模拟及非线性动力学分析
3.Numerical simulation study with 3DEC on impacted movement of hard roof in manless working face extraction;无人工作面开采坚硬顶板冲击运动的3DEC数值模拟研究