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[1]杨青,荣传新,蔡海兵,等.楔刀不同加载速率条件下细砂岩裂纹扩展研究*[J].中国安全生产科学技术,2023,19(12):93-101.[doi:10.11731/j.issn.1673-193x.2023.12.012]
　YANG Qing,RONG Chuanxin,CAI Haibing,et al.Research on crack propagation in fine sandstone under different loading rates of wedge gear hob[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2023,19(12):93-101.[doi:10.11731/j.issn.1673-193x.2023.12.012]
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楔刀不同加载速率条件下细砂岩裂纹扩展研究*()
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
19
期数:
2023年12期
页码:
93-101
栏目:
职业安全卫生管理与技术
出版日期:
2023-12-31

文章信息/Info

Title:
Research on crack propagation in fine sandstone under different loading rates of wedge gear hob
文章编号:
1673-193X(2023)-12-0093-09
作者:
杨青; 荣传新; 蔡海兵; 黎明镜; 经纬; 李登国
(1.安徽理工大学 土木建筑学院，安徽 淮南 232001；
2.安徽理工大学 矿山地下工程教育部工程研究中心，安徽 淮南232001；
3.安徽理工大学 深部煤矿采动响应与灾害防控国家重点实验室，安徽 淮南 232001；
4.浙江工业大学 土木工程学院，浙江 杭州 310000)
Author(s):
YANG Qing;  RONG Chuanxin;  CAI Haibing;  LI Mingjing;  JING Wei;  LI Dengguo
(1.School of Civil Engineering and Architecture,Anhui University of Science and Technology,;
2.Engineering Research Center of the Ministry of Education for Underground Engineering in Mines,Anhui University of Science and Technology;
3.State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science and Technology;
4.School of Civil Engineering,Zhejiang University of Technology)
关键词:
楔齿滚刀; 细粒砂岩; 空腔膨胀; 拉剪裂纹; 加载速率; 胶结破坏比能耗
Keywords:
wedge gear hob;  fine sandstone;  cavity expansion;  tension shear crack;  loading rate;  specific energy consumption of cementation failure
分类号:
X936；U455.8
DOI:
10.11731/j.issn.1673-193x.2023.12.012
文献标志码:
A
摘要:
为提高西部竖井钻井法楔齿滚刀钻进细砂岩的破岩效率，开展西部弱胶结砂岩XRD与SEM试验，微观结构验证PFC2D模拟试验细观参数标定结果，探讨不同加载速度工况下弱胶结砂岩拉、剪裂纹形成，破岩阻力变化及破岩机理、破岩效率。研究结果表明：胶结物是加卸载段生成的微宏观裂纹萌生、扩展的通道，贯入速率超过0.01 m/min以上，将导致更大的动力效应、更大的应力集中（楔刀贯入）和应力波（密实核应力膨胀）传播，岩石内部的应力集中区域扩展，产生部分无效裂纹。贯入速率0.02 m/min平均贯入力是贯入速率0.01 m/min平均贯入力的1.64倍；贯入速率为0.01 m/min时取得最小胶结破坏比能耗，与可可盖矿中央回风立井施工现场钻进速率非常吻合。研究结果可为西部弱胶结砂岩楔齿滚刀破岩提供参考。
Abstract:
In order to improve the rock breaking efficiency of fine sandstone drilled with wedge gear hob by shaft drilling method in western China,the XRD and SEM tests of weakly cemented sandstone in western China were carried out.The results of micrometric parameter calibration of PFC2D simulation test were verified by microstructure tests,and the formation of tensile and shear cracks,rock breaking resistance changes,rock breaking mechanism and rock breaking efficiency of weakly cemented sandstone under different loading rates were discussed.The results show that the cement is a channel for the initiation and propagation of micro-macro-cracks generated in loading and unloading section.If the penetration rate exceeds 0.01 m/min,it will lead to greater dynamic effect,greater stress concentration (wedge gear hob penetration) and stress wave propagation (dense core stress expansion),and the stress concentration area inside the rock will expand,resulting in some ineffective cracks.The average penetration force at the penetration rate of 0.02 m/min is 1.64 times of that at the penetration rate of 0.01 m/min.The minimum specific energy consumption of cementation failure is obtained when the penetration rate is 0.01 m/min,which is very consistent with the drilling rate of the central return air shaft construction site in Kekegai coal mine.The research results can provide reference for rock breaking of weakly cemented sandstone in western China by wedge gear hob.

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备注/Memo

备注/Memo:
收稿日期： 2023-06-23
* 基金项目： 安徽省高校研究生科研项目(YJS20210385)；安徽理工大学矿山地下工程教育部工程研究中心2020年基金项目(JYBGCZX2020209)
作者简介： 杨青，博士研究生，讲师，主要研究方向为岩土与地下工程。
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