理論研究 2024年 第53卷 第21期
DOI: 10. 7672 / sgjs2024210096
基于離散元的鑲齒滾刀破巖機(jī)理研究
周平
作者簡介：
周平，高級(jí)工程師，E?mail:18028562070@ 189. cn作者單位：
廈深鐵路廣東有限公司，廣東深圳 518000基金項(xiàng)目：
?國家自然科學(xué)基金（52378418）摘要：
鑲齒滾刀作為廣泛應(yīng)用于豎井掘進(jìn)設(shè)備的破巖鉆進(jìn)刀具，其破巖方式與破巖效率影響豎井掘進(jìn)設(shè)備性能，需對(duì)球齒破巖機(jī)理進(jìn)行研究。采用二維離散元程序建立盡可能接近真實(shí)物理力學(xué)性能的巖石離散元模型，經(jīng)過合理簡化刀具破巖運(yùn)動(dòng)形式，模擬鑲齒滾刀多個(gè)球齒破巖過程。從微觀角度分析球齒破巖時(shí)巖石微裂紋萌生、擴(kuò)展和破碎過程，探究球齒破巖機(jī)理。通過設(shè)置多組不同齒間距和貫入度下的仿真試驗(yàn)，研究刀具所需破巖荷載變化規(guī)律。采用平行黏結(jié)破壞產(chǎn)生微裂紋的能力評(píng)價(jià)球齒破巖比能耗，研究齒間距和貫入度對(duì)球齒破巖比能耗的影響，并得到較低球齒破巖比能耗下的參數(shù)合理取值。
English：
Inserted?tooth roller cutter is widely used as a rock breaking drilling tool in vertical shaftexcavation equipment, the rock breaking method and efficiency of the inserted?tooth roller cutter affectthe performance of the vertical shaft excavation equipment, and the spherical teeth rock breakingmechanism needs to be studied. A two?dimensional discrete element program is used to establish a rockdiscrete element model that is as close as possible to the real physical and mechanical properties. Afterreasonably simplifying the cutting tool rock breaking motion form, the rock breaking process of multiplespherical teeth of the inserted?tooth roller cutter is simulated. The initiation, propagation and crushingprocess of rock microcracks during spherical teeth rock breaking are analyzed from a microscopic point ofview, and explore the mechanism of spherical teeth rock breaking. By setting up multiple simulationexperiments with different tooth spacing and penetration, the variation law of rock breaking load requiredfor cutting tools is studied. The ability to generate microcracks through parallel bonding failure is used toevaluate the specific energy consumption of spherical teeth rock breaking. The influence of tooth spacingand penetration on the specific energy consumption of spherical teeth rock breaking is studied, andreasonable parameter values are obtained for lower specific energy consumption of spherical teeth rockbreaking.