Experiments with the rock breaking ability of star-shaped jet is presented in this article.
在淹没和非淹没条件下对星形喷嘴射流的破岩能力进行了实验研究。
The invention relates to a method of measuring a stress wave and to a measuring device and a rock breaking device.
本发明涉及一种测量应力波的方法和测量设备以及岩石破碎设 备。
It is found that under the non-submerged condition, the rock breaking ability of star-shaped jet is greater than that of round jet;
结果表明，在非淹没条件下，星形喷嘴射流的破岩能力高于常规圆形喷嘴射流；
Air drilling is a kind of under-balanced drilling technology with air, whose rock breaking form is different from conventional mud drilling.
空气钻井技术是以空气作为循环介质的欠平衡钻井技术，其钻头的破岩形式与常规泥浆钻井有很大的区别。
To date, the research on the rock breaking properties of disc cutters of shield machine, compared with foreign countries, is still in its initial stage.
目前，国内有关盾构掘进机盘形滚刀破岩特性的研究与国外相比较，尚处于探索阶段。
Mechanical rock breaking is the main function of modern rotary drilling. The purpose of jet aided mechanical rock breaking is to improve the penetration rate.
现代旋转钻井破碎岩石是以机械破岩为主导方式，射流辅助机械破岩的目的是提高机械钻速。
Basing upon the kinematic features of a planetary drill the paper deals with its specificity of rock breaking. The process and basic laws of rock breaking are presented.
根据行星钻头的运动特征，本文分析了行星钻头破岩的特点及其工作面的破坏方式，揭示了行星钻头破岩的基本规律。
The effect of earth pressure to rock breaking is studied. The principle of rock breaking mechanism by TBM is discussed and the action of rock breaking angle is emphasized.
通过地应力对破岩影响的分析，对TBM破岩机理进行了研究，着重考虑了岩石破裂角对破岩效果的影响。
On the basis of this, the problems existing in the study of water-jet rock breaking theory are reviewed out and analysed and some Suggestions for the theory study are given.
在此基础上评述和分析了水射流破岩理论研究存在的问题，并为水射流破岩理论的研究提出了一些建议。
The simulation results, which are suitable for studying the rock breaking mechanism of TBM in shallow-buried strata, have a good consistency with the experimental results and in-situ data.
仿真结果与实验室观测结果表明，研究成果和施工现场数据存有良好的一致性，可适用于浅地层TBM掘进机破岩机制的研究。
Through the theoretical and experimental study on rock breaking by submerged water jetting, taking rock breaking efficiency as goal function, the optimum jetting pressure was acquired to break rock.
本文通过对淹没射流破碎岩石的理论及实验研究，以破岩效率作为目标函数，得到射流破岩的最优压力条件。
Anomaly shape is consistent well with the numerical simulation of the rock - breaking test.
异常形态与岩石破裂实验数值模拟结果有较好的一致性。
The rock-breaking mechanism of roller bit teeth is always a hot focus and difficulty in the fields of drilling, and it receives widely researchers attentions in the rock mechanics and the engineering.
牙轮钻头牙齿破岩机理研究一直是钻井工程的一个热点和难点，备受岩石力学与工程界的关注和重视。
The main factors that influence the efficiency of rock-breaking are the down-hole rock properties and the rock-breaking tools and methods.
其破岩效率的主要影响因素是井下地层岩石性质、破岩工具和方法。
According to the conservation principle of energy and the rock-breaking mechanism of bit, the assessment model was set up for formation lithology and the working condition of bit.
根据能量守衡原理和钻头破岩机理，建立了地层岩性与钻头工况评估模型。
The bit needs not only the high rock-breaking capacity but also the strong wear and low resistance during rock-breaking process.
而钻头在破岩过程中，既要求具有高效的破岩能力，又要求具有强耐磨性和低阻力。
The pulsed water cannon which is a new and effective hydrodynamic rock-breaking device, will find a wide application.
脉冲水炮是一种新型有效的水力破岩装置，因而具有广阔的发展前景。
The pulsed water cannon which is a new and effective hydrodynamic rock-breaking device, will find a wide application.
脉冲水炮是一种新型有效的水力破岩装置，因而具有广阔的发展前景。
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