Researches indicate that the new type of DTH hammer without drilling machine can make DTH hammer achieve percussive and rotary drilling using air compressor.

The New Extension of the Multi-process of Percussive and Rotating Drilling

多工艺冲击回转钻进技术的新拓展

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Fuzzy Control of Automatic Drilling of Drum-type Percussive Reverse Circulation Drilling Machines

卷筒式冲击反循环钻机自动钻进的模糊控制

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According to field experiments, the authors assessed performance of KSC-127 fluid efflux hammer, analyzed its adaptation to CSDP and discussed drilling technology of large diameter non-coring percussive rotary drilling.

根据现场试验，评价了KSC-127冲击器的性能，分析了其对大陆科学深钻的适应性，且对大直径全面破碎冲击回转钻进工艺进行了讨论。

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The conclusions are as follows: ( 1) under high pressure, the intensity of granite gradually decreases and the percussive rotary drilling speed increases gradually with the increase of temperature;

得出以下结论：①在高围压状态下，随着温度升高，花岗岩的强度逐渐降低，冲击旋转钻进速度随之逐渐增大；

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The percussive rotary drilling technology being the most efficient way to break up the hard rocks has been highly thought of by oil drilling circles commonly at present.

冲击旋转钻井技术这一被认为是破碎坚硬岩石最有效的方法目前在石油钻井界得到了普遍重视。

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Study on the percussive rotary drilling law under various temperatures is of great significance because it can provide a theoretical basis for new drilling process designed for geothermal production.

研究不同温度条件下冲击回转凿岩规律具有重要意义，可以为设计地热开采的新型钻探方法提供理论依据。

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Recently the Guangxi First Geological Engineering Construction Company introduces the percussive reverse drilling method, and has made a great breakthrough.

最近，广西第一地质工程地质施工公司引进了冲击反循环钻进方法用于滑坡治理工作，取得重大突破。

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Mathematic Model for Percussive Rock Drilling and Its Application to the Piston Failure Analysis

冲击凿岩数学模型及活塞失效分析

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In this paper, the dynamic properties of rocks relevant to percussive drilling and blasting are studied by means of SHPB method, with a emphasis on the investigation of the change of the dynamic strength and energy absorption of rocks with stress wave durations and amplitudes.

作者采用应力波加载方法，研究了与凿岩爆破有关的岩石破碎力学性质，着重考察了不同应力波延续时间和波幅对岩石破碎强度和破碎效果的影响。

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To drill through the seams and solitary rocks is a difficulty in rock socketed piling. Good economic and social benefits have resulted by the use of the conventional percussive drilling equipment with the modification of the construction process and matching technique.

使用常规冲钻孔桩施工设备，通过改进施工工艺与配套技术，可以获得好的社会效益和经济效益。

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Mechanical model and vibration equation of vibratory percussive drilling are established, the meaning of the solution to the vibration equation in vibratory percussive drilling is discussed by analyzing the conditions of vibratory percussive drilling in the paper

通过对机械振动钻进工况的分析，提出了机械振动钻进的力学模型，建立了机械振动钻进的振动方程，并就方程的解对振动钻进的意义进行了探讨

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Percussive drilling is used to impact rock and soil with the kinetic energy by the falling of percussive bit, which is lifted by a cable driven by a linkage or a hoist.

冲击钻机是一种采用连杆机构或卷扬机带动钢丝绳提升冲击钻具，利用冲击钻具下落的动能产生冲击作用，破碎岩土实现钻进的工程钻机。

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The value of SEDD is nearly equal to that of specific energy of percussive drilling ( SEPD) in moderately weathered granite.

在软的全风化及强风化花岗岩中，金刚石钻进比功值低于冲击凿碎比功值；

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However, the SEP in diamond rotary drilling was higher than the SEF in percussive drilling in lightly weathered hard as well as in extremely hard rock.

在微风化的坚硬与极坚硬岩石中，金刚石旋转钻进比功则明显高于冲击凿碎比功。

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Based on certain mechanical quality of the rock, the analysis on the Polycrystalline Diamond Compacts ( PDC) bit and the rotary percussive drilling is carried out.

在管棚支护所钻岩石的力学性质基础上，对管棚支护钻孔所采用PDC钻头和回转冲击的钻进方式进行了比较分析。

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In this paper, based on the theory of percussive drilling, the following optimum design of hydraulic rock drills are studied with the application of wave mechanics.

冲击钻进用金刚石复合材料本论文在冲击凿岩的理论基础上，应用波动力学理论，研究了冲击凿岩系统优化设计中的一些问题。

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For the complicated geographical conditions in karst area, percussive drilling method is the most effective drilling method to embedded rock piles.

对于岩溶地区复杂的地质条件，冲击钻进方法是嵌岩桩最有效的成孔方法，冲击成孔工艺随地层变化较大，冲孔桩成孔的成败决定于成孔工艺的合理性。

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A study on joint energy transfer efficiency and ideal incident wave shape of percussive drilling with extension rods

接杆凿岩中接头能量传递特性与理想入射波形的研究

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This paper describes fundamental concepts of stress wave theory for percussive drilling and principal problems to be investigated.

本文阐述了冲击式钻眼法应力波理论的基本概念，以及需要探讨的几个主要问题。

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Discussion on the vibration equation of vibratory percussive drilling

机械振动钻进方程及其意义的探讨

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