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现代隧道技术 2017, Vol. 54 Issue (3) :148-154    DOI:
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不同围压下节理岩体中 TBM滚刀破岩效率研究
(1 河南大学土木建筑学院, 开封 475004; 2 中国矿业大学深部岩土力学与地下工程国家重点实验室,徐州 221116)
Efficiency of Rock Breaking by TBM Cutters in a Joint Rock Mass with Different Confining Pressures
(1 School of Civil Engineering and Architecture, Henan University, Kaifeng 475004; 2 State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, 221116)
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摘要  为提高TBM掘进效率, 降低TBM施工成本, 有必要研究节理岩体中的滚刀破岩效率。为此, 文章采用二维离散元软件 UDEC研究在不同围压下, 节理间距、 节理倾角、 滚刀间距及贯入度对破岩效率的影响规律。研究表明: (1)节理倾角以30°附近为界向上增加或向下减小, 比能耗随围压增加而减小的趋势变缓, 并且在接近90°和0°时, 围压的增加对滚刀破岩呈现不利影响; (2)节理岩体节理间距越小, 比能耗受围压影响越明显。随着节理间距的增加, 围压对比能耗的影响逐渐弱化, 直至消失; (3)节理倾角0°附近, 在满足安装要求的情况下滚刀间距宜取小值;节理倾角 30°附近, 刀间距 100 mm左右时比能耗最小; 节理倾角 60°时, 刀间距 120 mm左右比能耗最小;(4) 在滚刀之间裂隙贯通的前提下, 节理岩体取较小贯入度时破岩效率较高。
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Abstract: In order to improve TBM tunnelling efficiency and reduce construction costs, it is necessary to study the efficiency of rock breaking in a joint rock mass. UDEC was adopted to perform research on the influence of joint spacing, joint inclination, cutter spacing and penetration on rock breaking efficiency. The results show that: 1) the trend of specific energy consumption decreasing with increasing confining pressure slows down when the joint inclination increases or decreases from 30° to 90° or from 30° to 0° , and the increase of confining pressure is adverse to rock breaking when the joint inclination is approaching 90° or 0°; 2) The smaller the joint spacing, the more obvious the influence of confining pressure on specific energy consumption. With an increase of joint spacing, the influence of confining pressure on specific energy consumption decreases until it has no effect; 3) When the joint inclination is around 0° , it is better to choose a small cutter spacing as long as it meets the requirements of installation; when the joint angle is around 30° , the specific energy consumption is the lowest if the cutter spacing is about 100 mm; when the joint inclination is around 60° , the specific energy consumption is the lowest if the cutter spacing is about 120mm; and 4) If cracks produced by two cutters are cutting through the joint rock mass, the rock breaking efficiency is best with small rock mass penetration.
KeywordsTBM cutter,   Efficiency of rock breaking,   Confining pressure,   Joint inclination,   Joint spacing,   Cutter spacing,   Penetration     
基金资助:基金项目: 国家自然科学基金资助项目 (51608174) ;河南省科技发展计划项目(162102310603); 河南省科技发展计划项目(152102310299).
作者简介: 作者简介: 温 森 (1981-), 男, 博士后, 副教授, 硕士生导师, 主要从事地下工程方面的研究工作, E-mail: wensn@henu.edu.cn. 通讯作者: 孔庆梅(1978-), 女, 硕士, 讲师,主要从事隧道方面的研究工作, E-mail: ameispring@163.com.
引用本文:   
.不同围压下节理岩体中 TBM滚刀破岩效率研究[J]  现代隧道技术, 2017,V54(3): 148-154
.Efficiency of Rock Breaking by TBM Cutters in a Joint Rock Mass with Different Confining Pressures[J]  , 2017,V54(3): 148-154
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