Research and development of frequency-adjustable prefabricated pulsed water jet nozzle and its applications in rock breaking

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-07-22 DOI:10.1016/j.powtec.2025.121442

Jiancheng Zhang , Bin Liu , Bo Zhang , Biao Li , Yaxu Wang

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Abstract

To investigate the principles, mechanisms, and efficient methods of rock breaking using pulsed water jet, a frequency-adjustable prefabricated pulsed water jet nozzle was developed. The nozzle primarily consists of an upstream nozzle, sub-chambers and downstream nozzle. During the rock breaking process, the chamber length can be altered by changing the number of sub-chambers, thereby achieving the objective of modifying the pulsed frequency according to the geological characteristics. Using this device, experiments were conducted to calibrate the pulsed water jet frequency and assess its rock breaking performance, which was compared with that of continuous water jet. The results indicate that the pulsed water jet frequency can be effectively controlled by varying the number of sub-chambers, leading to a significant enhancement in the erosion effect compared to continuous water jet. This device is significant for advancing research on efficient rock breaking using pulsed water jet and the combined method of pulsed jet and mechanical techniques.

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可调频预制脉冲水射流喷嘴的研制及其在破岩中的应用

为了研究脉冲水射流破岩的原理、机理和有效方法，研制了一种可调频预制脉冲水射流喷嘴。该喷嘴主要由上游喷嘴、分室和下游喷嘴组成。在破岩过程中，可以通过改变子腔的数量来改变腔长，从而达到根据地质特征改变脉冲频率的目的。利用该装置进行了脉冲水射流频率标定和破岩性能试验，并与连续水射流进行了对比。结果表明，通过改变子室数可以有效地控制脉冲水射流频率，使得冲蚀效果较连续水射流显著增强。该装置对推进脉冲水射流高效破岩以及脉冲水射流与机械技术相结合的研究具有重要意义。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.