coal drill

用法例句

This article introduces the practice of releasing gas by using the wind coal drill in the big road of shaft,which shows that the technology is reasonably,the economic efficiency is remarkable,the security has guarantee,is a practical feasible effective way and has broad application prospect.

介绍了立井六采左13路18层大巷采用风煤钻释放瓦斯的实践,技术合理,经济效益显著,安全有保证,是切实可行的的有效途径,具有广阔的应用前景。

The method of drilling by the wind coal drill,the coal body produces the crack and releases gas under the conditions of the dynamic pressure function of mining field,then draining gas with drainage facility to govern the local high gas region at working surface are introduced.

介绍了利用风煤钻施工钻孔,在采场动压作用下煤体产生裂隙释放瓦斯,然后利用抽排设施抽放瓦斯,治理采面局部高瓦斯区域的方法。

By the test analysis methods of simulating field production,we study on the working instability of integrated protector for coal electronic drill.

通过模拟现场生产实际的实验分析方法,对煤电钻综合保护装置工作不稳定性进行研究,得出了综合保护装置工作不稳定的主要原因,在于使用的载频短路保护技术特性不稳定的重要结论;而影响载频短路保护技术特性的主要原因,在于电源供电网络参数通过主变压器反馈,改变了载频振荡器的谐振槽路参数,谐振频率发生变化,迫使振荡器振幅降低,甚至停振。

Discussion on the reason of influencing coalfield drilling efficiency and its countermeasure

浅谈影响煤田钻探效率的原因及其对策

New-style quick interruption versatile protector of electric coal drill;

新型快速断电煤电钻综合保护装置

In this paper, the structure and operation mode of an electric coal drill, temporarily named MSZ-12C with hydrau-electric control is introduced.

　介绍了一种暂名为MSZ 12C型的水电联控式煤电钻的结构及其工作方式。

According to the enlarging embrasure and making use of ZM12T and ZM12D coal electric drill,develops a type of ZMJ-1 equipment of determining anti_cutting intension of coal and rock used in coal_mine underground,and educes dependence formula of anti_cutting intension of coal and rock and the height of measuring curve.

根据扩钻炮眼的方法 ,利用ZM12T和ZM12D煤电钻 ,研制一台ZMJ— 1型煤岩抗截强度井下测定装置 ,并推导出煤岩抗截强度与实测曲线高度的关系

The problems in leakage protection and executive circuit of synthetical protection set in coal electric drill have been analyzed and calculated.

通过分析和计算说明老式煤电钻综合保护装置在漏电保护和执行电路中存在的问题。

Carrier frequency short circuit protection of integrated protector for coal electric drill was analysed by doing experiment,proves protect action of carrier friquency is regular when the length of cable is shorter than 200m.

针对目前煤电钻综合保护装置中的载频短路保护电路进行实验分析,证明当电缆长度小于200 m时载频短路保护动作基本正常;当电缆长度大于200 m时,保护动作不正常,并且保护动作受电缆的截面积影响程度将更加明显。

Application of Loosening Roadway Sides and Pressure Relief with Wind-coal Drill in Roadway of Excavation Face

风煤钻松帮卸压在采掘工作面巷道中的应用

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

Medium Pressure Compressed Air Drilling Technique and Matched Equipment in Soft and Outburst Seam

松软突出煤层中风压空气钻进工艺及配套装备

Research on Air Supply Parameter and Design on Dust Collector for Moderate Pressure Air Drilling in Soft Coal Bed

松软煤层中风压空气钻进供风参数研究及除尘装置研制

Application of Wind Pressure Draining Dust Technology to Construction Drainage Drilling in Soft,Thin Seam

压风排粉技术在松软、薄煤层施工抽放钻孔中的应用

Identification of coal block tcxture with core and application

用钻孔煤心鉴别煤层煤体结构及其应用

Research on Direction Control Techology of Auger Drill Miner Drill

螺旋钻采煤机钻具定向控制技术的研究

Research of Key Technology with Drilling Stem Fixed with Cable in Directional Drilling under Coal Mine

煤矿井下定向钻进通缆钻杆关键技术研究

Application of Triangular Drilling Rod to Gas Drainage Borehole Drilling in Medium Soft Seam

三棱钻杆在中软煤层顺层瓦斯抽排钻孔的应用

Application of Drilling Engineering in Fracturing Test Borehole of Gasification Coal Mining

钻探工程在气化采煤压裂试验钻孔中的应用

The measurement while drilling technology in nearly horizontal directional drilling in coal mines

煤矿井下近水平定向钻进中的随钻测量技术

The Better Chosen of the Field Arrangement of the Drill Hole Pulls Out Putting Drills and the Drill Hole Parameter of the Coal Bed Gas in PanJiang Mining Area;

盘江矿区煤层气钻孔抽放钻场布置及钻孔参数优选

Application of Cuimiao Coal Drill Protection Layer Face Shearer Style in Drilling

崔庙煤矿保护层工作面钻采煤机在钻采中的应用

bar rigged drifter

架式风钻，架式凿岩机

Light Drills Digs "Three soft" Coal Bed Coal Lane Tunneling Application

轻型钻掘机在“三软”煤层煤巷掘进中的应用

Application of Anti-well Drilling Rig to Main Shaft Coal Bunker Construction in Xinyi Coal Mine

反井钻机在新义煤矿主井煤仓施工中的应用

Application of Directional Drilling in CBM Exploration

定向钻进技术在煤层气勘探中的应用

The Structural Principle and Application Practice of Coal Auger

螺旋钻采煤机的结构原理和使用实践