Surface borehole well is a simply and high performance method to drawing coal bed and goaf gas which controlling and making good use of the coal mine gas.
地面钻井抽采采动影响煤层及采空区瓦斯是进行煤矿瓦斯治理和抽采利用的有效方法。
According to sampling analysis the surface river water and ground water in borehole have micro-corrosion on concrete structure rebar in reinforced concrete and steel structure.
根据取样分析地表河水、钻孔内地下水对混凝土结构、对钢筋混凝土中钢筋、对钢结构均具微腐蚀性。
The specific surface area is closely related to shale waterize property, property of mechanics and weeping property. It is a key factor for evaluating borehole stability of mud shale.
泥页岩比表面积与泥页岩水化特性、力学性质以及渗水性密切相关，是评价泥页岩井壁稳定性的关键参数。
To pump fluid through the whole active fluid system, including the borehole and all the surface tanks that constitute the primary system.
通过整个主动的流体体系泵送流体，这一系统包括井眼和所有构成主要循环系统的地面罐。
By directly measuring the acoustic velocity of each formation encountered in a well, the well logs and borehole seismic data can be correlated to surface seismic data more easily.
通过直接测量井中每一地层的声速度，测井记录和井中地震数据可以更容易地和地表地震数据联系起来。
And returns to the surface in the space between the drill pipe and the wall of the borehole.
然后通过钻杆和钻孔壁之间的间隙返回至地表。
Preexisting research shows that there are three main factors that affect the borehole stability of Air-Drilling: mechanical reason, hydration reason and the Weaked surface instability reason.
研究表明，影响空气钻井井壁稳定的主要因素有三个：力学不稳定，水化不稳定和岩体破裂或弱面不稳定。
The essay expatiates the techniques of borehole in surface blasting, and instructs the construction of borehole in surface blasting.
本文阐述了露天深孔爆破的钻孔施工工艺，对露天爆破钻孔有参考和指导作用。
In the course of surface mining, it is easy to exit bedrock and affect loading if the borehole is bad quality;
在露天矿山开采中，如果钻孔质量不好，爆破后易留有根底，直接影响铲装；
Previous studies show that both dynamite borehole shots and vertical vibrations from controllable seismic sources at the surface will produce relatively strong pure P-waves and weaker pure S-waves.
已有的研究表明，炸药震源在井下激发、可控震源在地面垂向振动，均会产生较强的纯纵波和一定强度的纯横波；泊松比差别较大的分界面有利于形成较强的透射转换横波。
Considering complex geoelectric model, the study of 3-d inversion approaches of borehole-to-surface electric data is always a challenge.
针对复杂地电模型的井地电法三维反演方法研究一直是一个具有挑战性的课题。
The surface-borehole 5-direction IP survey is one of widespread applied methods in in-hole IP surveying.
地-井五方位IP是目前井中激电的广泛应用的工作方式之一。
The data in the area of the borehole of 8-26-J9 were obtained with the borehole-to-surface electrical measurement method.
用数值模拟和反演成像方法对实测电位数据进行了处理，得到了2 6J9井区目的层的电阻率和剩余油饱和度分布。
The data in the area of the borehole of 8-26-J9 were obtained with the borehole-to-surface electrical measurement method.
用数值模拟和反演成像方法对实测电位数据进行了处理，得到了2 6J9井区目的层的电阻率和剩余油饱和度分布。
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