Review

Research progress on the mechanisms of dust generation during cutting by mining and tunneling machines in underground coal mines

  • ZHOU Wendong ,
  • CUI Yanwei ,
  • WANG Hetang ,
  • REN Gehui ,
  • CUI Xinyue ,
  • WANG Hao ,
  • SHEN Aojie
Expand
  • 1. School of Emergency Management, Nanjing University of Information Science & Technology, Nanjing 210044, China;
    2. Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, Xuzhou 221116, China;
    3. Shandong Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, China

Received date: 2024-06-29

  Online published: 2025-03-07

Abstract

[Significance] Coal remains the most essential fossil energy source in China, with production from underground coal mines accounting for more than 80%. In underground coal mining operations, dust is a pervasive and hazardous material that can significantly compromise the safety and health of miners. High dust concentrations are associated with an increased incidence of pneumoconiosis and a heightened risk of catastrophic events, such as coal dust or gas explosions. The primary source of dust is the cutting processes of excavators and roadheaders during the extraction of coal and rock. Therefore, it is essential to comprehensively elucidate the mechanism of dust generation during cutting and heading operations for effective dust control in underground coal mines. [Progress] This paper presents an overview of the latest research developments in the field of dust generation, with a particular emphasis on three key areas: the behavior of dust generation during cutting, research methodology, and influencing mechanisms. First, regarding the behavior of dust generation during cutting by excavators and roadheaders, researchers have proposed several theoretical models to elucidate both the fragmentation processes of coal and rock bodies and the generation of dust under the influence of cutting. These models are based not only on the principle of energy conversion but also on the influence of the geometry of the cutting pick during the dust generation process. This provides a solid theoretical basis for understanding the physical nature of dust generation. Regarding the research tools employed, researchers have simulated the dust generation phenomena when mining machinery cuts coal and rock bodies through physical experiments conducted on self-designed experimental platforms. Researchers have also conducted numerical simulations using finite element or discrete element methods. These advanced experimental techniques elucidate the actual cutting conditions and offer a robust analytical tool for investigating the dust generation mechanism in depth. Additionally, this study provides a comprehensive analysis of the mechanisms influencing dust generation during cutting, examining both internal and external factors. These factors include the physicochemical properties of coal and rock, such as coal rank, moisture content, pore characteristics, strength, and brittleness, as well as the parameters of the cutting conditions, such as cutting depth, advance speed, drum rotation speed, and the morphology and arrangement of picks. [Conclusions and Prospects] Current research on the dust generation mechanism during cutting reveals several contradictions. Existing models often rely on simplified assumptions, neglecting the anisotropy of coal and the actual cutting conditions in the field, leading to discrepancies between the calculated results and experimental observations. Moreover, existing experimental platforms struggle to accurately replicate the motion of the cutting pick during actual operations. Although many studies have focused on the properties of coal and rock and dust characteristics, some of the conclusions are conflicting. Future research should prioritize the construction of full-scale experimental platforms and the development of high-precision monitoring technologies. Comprehensively investigating the dust generation characteristics of complex coal seams and quantifying the energy conversion mechanisms during the cutting process are crucial. These efforts are essential for improving the efficiency of cutting operations and achieving more effective dust control.

Cite this article

ZHOU Wendong , CUI Yanwei , WANG Hetang , REN Gehui , CUI Xinyue , WANG Hao , SHEN Aojie . Research progress on the mechanisms of dust generation during cutting by mining and tunneling machines in underground coal mines[J]. Journal of Tsinghua University(Science and Technology), 2025 , 65(3) : 414 -432 . DOI: 10.16511/j.cnki.qhdxxb.2025.26.017

References

[1] 国家统计局. 中华人民共和国2023年国民经济和社会发展统计公报[EB/OL]. (2024-02-29) [2024-05-10]. https://www.stats.gov.cn/sj/zxfb/202402/t20240228_1947915.html. National Bureau of Statistics. Statistical Communique of the People's Republic of China on the 2023 national economic and social development [EB/OL]. (2024-02-29) [2024-05-10]. https://www.stats.gov.cn/sj/zxfb/202402/t20240228_1947915.html. (in Chinese)
[2] 王虹, 王建利, 张小峰. 掘锚一体化高效掘进理论与技术[J]. 煤炭学报, 2020, 45(6): 2021-2030. WANG H, WANG J L, ZHANG X F. Theory and technology of efficient roadway advance with driving and bolting integration [J]. Journal of China Coal Society, 2020, 45(6): 2021-2030. (in Chinese)
[3] 李德文, 隋金君, 刘国庆, 等. 中国煤矿粉尘危害防治技术现状及发展方向[J]. 矿业安全与环保, 2019, 46(6): 1-7. LI D W, SUI J J, LIU G Q, et al. Technical status and development direction of coal mine dust hazard prevention and control technology in China [J]. Mining Safety & Environmental Protection, 2019, 46(6): 1-7. (in Chinese)
[4] 周福宝, 袁亮, 程卫民, 等. 矿井粉尘职业健康防护技术2013—2023年研究进展[J]. 中国安全生产科学技术, 2023, 19(12): 5-15. ZHOU F B, YUAN L, CHENG W M, et al. Research progress on occupational health protection technology of mine dust from 2013 to 2023[J]. Journal of Safety Science and Technology, 2023, 19(12): 5-15. (in Chinese)
[5] ZHOU W D, WANG H T, WANG D M, et al. The effect of coal proximate compositions on the characteristics of dust generation using a conical pick cutting system [J]. Powder Technology, 2019, 355: 573-581.
[6] 中华人民共和国国家卫生健康委员会. 2023年我国卫生健康事业发展统计公报[EB/OL]. (2024-08-29) [2024-09-09]. http://www.nhc.gov.cn/guihuaxxs/s3585u/202408/6c037610b3a54f6c8535c515844fae96.shtml. National Health Commission of the People's Republic of China. 2023 statistical bulletin on the development of health care in China [EB/OL]. (2024-08-29) [2024-09-09]. http://www.nhc.gov.cn/guihuaxxs/s3585u/202408/6c037610b3a54f6c8535c515844fae96.shtml. (in Chinese)
[7] 袁亮. 煤矿粉尘防控与职业安全健康科学构想[J]. 煤炭学报, 2020, 45(1): 1-7. YUAN L. Scientific conception of coal mine dust control and occupational safety [J]. Journal of China Coal Society, 2020, 45(1): 1-7. (in Chinese)
[8] 顾大钊, 李全生. 基于井下生态保护的煤矿职业健康防护理论与技术体系[J]. 煤炭学报, 2021, 46(3): 950-958. GU D Z, LI Q S. Theoretical framework and key technologies of underground ecological protection based on coal mine occupational health prevention [J]. Journal of China Coal Society, 2021, 46(3): 950-958. (in Chinese)
[9] 程卫民, 周刚, 陈连军, 等. 我国煤矿粉尘防治理论与技术20年研究进展及展望[J]. 煤炭科学技术, 2020, 48(2): 1-20. CHENG W M, ZHOU G, CHEN L J, et al. Research progress and prospect of dust control theory and technology in China's coal mines in the past 20 years [J]. Coal Science and Technology, 2020, 48(2): 1-20. (in Chinese)
[10] 国家煤矿安全监察局. 建国以来煤矿百人以上事故案例汇编: 1949—2006[M]. 徐州: 中国矿业大学出版社, 2007. National Coal Mine Safety Administration. Compilation of cases of coal mine accidents with more than 100 people since the founding of the People's Republic of China: 1949—2006[M]. Xuzhou: China University of Mining and Technology Press, 2007. (in Chinese)
[11] 李德文, 赵政, 郭胜均, 等. “十三五”煤矿粉尘职业危害防治技术及发展方向[J]. 矿业安全与环保, 2022, 49(4): 51-58. LI D W, ZHAO Z, GUO S J, et al. “13th Five-Year Plan” coal mine dust occupational hazard prevention and control technology and development direction [J]. Mining Safety & Environmental Protection, 2022, 49(4): 51-58. (in Chinese)
[12] 金龙哲, 刘建国, 林清侠, 等. 矿山喷雾降尘技术研究与应用现状综述[J]. 金属矿山, 2023(7): 2-17. JIN L Z, LIU J G, LIN Q X, et al. Review on the research and application of water spray dust-reduction technology in mines [J]. Metal Mine, 2023(7): 2-17. (in Chinese)
[13] WANG D M, LU X X, WANG H T, et al. A new design of foaming agent mixing device for a pneumatic foaming system used for mine dust suppression [J]. International Journal of Mining Science and Technology, 2016, 26(2): 187-192.
[14] 徐超航. 基于表面活性剂: 高分子稳定剂协同效应的矿用经济高效抑尘发泡剂研究[D]. 徐州: 中国矿业大学, 2019. XU C H. Study on economical and efficient foaming agent for mine dust suppression based on synergistic effect of surfactant and macromolecule stabilizer [D]. Xuzhou: China University of Mining and Technology, 2019. (in Chinese)
[15] 周文东. 掘进机截齿割煤产尘机制及减尘应用研究[D]. 徐州: 中国矿业大学, 2020. ZHOU W D. Mechanisms of dust generation cut by pick used in roadheader and application of reducing dust [D]. Xuzhou: China University of Mining and Technology, 2020. (in Chinese)
[16] 别隆, 卡赞斯基, 列依包夫. 煤炭切削原理[M]. 王兴祚, 译. 北京: 中国工业出版社, 1965. BEPOH A И, КАЗАНСКНЙ A С, ЛЕЙБОВ B M, et al. РЕЗАНИЕ УГЛЯ [M]. WANG X Z, Trans. Beijing: China Industry Press, 1965. (in Chinese)
[17] EVANS I. The force required to cut coal with blunt wedges [J]. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1965, 2(1): 1-12.
[18] EVANS I. A theory of the cutting force for point-attack picks [J]. International Journal of Mining Engineering, 1984, 2(1): 63-71.
[19] NISHIMATSU Y. The Mechanics of Rock Cutting [J]. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1972, 9(2): 261-270.
[20] 牛东民. 煤炭切削力学模型的研究[J]. 煤炭学报, 1994, 19(5): 526-530. NIU D M. Mechanical model of coal cutting [J]. Journal of China Coal Society, 1994, 19(5): 526-530. (in Chinese)
[21] ROXBOROUGH F F, LIU Z C. Theoretical considerations on pick shape in rock and coal cutting [R]. Kalgoorlie: Western Australia School of Mines, 1995.
[22] GOKTAN R. A suggested improvement on Evan's cutting theory for conical bits [C]//Proceedings of the 4th International Symposium on Mine Mechanization and Automation. Brisbane, Australia: Colorado School of Mines, 1997: A4-57.
[23] GOKTAN R M, GUNES N. A semi-empirical approach to cutting force prediction for point-attack picks [J]. The Journal of the South African Institute of Mining and Metallurgy, 2005, 105(4): 257-264.
[24] HUANG H. Discrete element modeling of tool-rock interaction [D]. Twin Cities: University of Minnesota, 1999.
[25] ALEHOSSEIN H, DETOURNAY E, HUANG H. An analytical model for the indentation of rocks by blunt tools [J]. Rock Mechanics and Rock Engineering, 2000, 33(4): 267-284.
[26] 李晓豁, 葛怀挺. 连续采煤机截齿随机载荷的数学模型[J]. 中国工程机械学报, 2006, 4(3): 262-264. LI X H, GE H T. Mathematical model of stochastic pick loads for a continuous miner [J]. Chinese Journal of Construction Machinery, 2006, 4(3): 262-264. (in Chinese)
[27] 刘春生, 靳立红. 基于截槽非对称条件镐形截齿的截割力学模型[J]. 煤炭学报, 2009, 34(7): 983-987. LIU C S, JIN L H. The cut mechanical model of pick-shaped cutter under conditions of dissymmetrical slotting [J]. Journal of China Coal Society, 2009, 34(7): 983-987. (in Chinese)
[28] 刘春生, 宋杨. 不同楔入角的镐齿破岩截割力模型与仿真[J]. 黑龙江科技学院学报, 2012, 22(3): 277-281. LIU C S, SONG Y. Development and simulation of cutting force model on conical pick cutting rock at different wedge angles [J]. Journal of Heilongjiang Institute of Science and Technology, 2012, 22(3): 277-281. (in Chinese)
[29] 高魁东. 薄煤层滚筒采煤机装煤性能研究[D]. 徐州: 中国矿业大学, 2014. GAO K D. Study on coal-loading performance of thin coal seam shearer [D]. Xuzhou: China University of Mining and Technology, 2014. (in Chinese)
[30] 刘送永. 采煤机滚筒截割性能及截割系统动力学研究[D]. 徐州: 中国矿业大学, 2009. LIU S Y. Research on cutting performance of shearer drum and cutting system dynamics [D]. Xuzhou: China University of Mining and Technology, 2009. (in Chinese)
[31] 罗晨旭. 滚筒采煤机开采含煤岩界面煤层截割特性研究[D]. 徐州: 中国矿业大学, 2015. LUO C X. Study on cutting characteristics of shearer mining coal seam with coal-rock interface [D]. Xuzhou: China University of Mining and Technology, 2015. (in Chinese)
[32] GAO K D, DU C L, JIANG H X, et al. A theoretical model for predicting the Peak Cutting Force of conical picks [J]. Frattura ed Integrità Strutturale, 2014, 8(27): 43-52.
[33] 王立平, 蒋斌松, 张翼, 等. 基于Evans截割模型的镐型截齿峰值截割力的计算[J]. 煤炭学报, 2016, 41(9): 2367-2372. WANG L P, JIANG B S, ZHANG Y, et al. Calculation of peak cutting force of conical picks based on Evans' cutting model [J]. Journal of China Coal Society, 2016, 41(9): 2367-2372. (in Chinese)
[34] 刘晋霞, 马超, 曾庆良, 等. 镐型截齿截割煤岩过程的截割力研究[J]. 煤炭学报, 2017, 42(5): 1325-1330. LIU J X, MA C, ZENG Q L, et al. Research on cutting force of conical pick in cutting coal process [J]. Journal of China Coal Society, 2017, 42(5): 1325-1330. (in Chinese)
[35] LI X, WANG S, GE S, et al. A theoretical model for estimating the peak cutting force of conical picks [J]. Experimental Mechanics, 2018, 58(5): 709-720.
[36] 王鑫. 采煤机截齿破岩机理与载荷重构研究[D]. 阜新: 辽宁工程技术大学, 2018. WANG X. Study on the mechanism of rock and load reconstruction of shearer [D]. Fuxin: Liaoning Technical University, 2018. (in Chinese)
[37] 金鑫. 采煤机螺旋滚筒截割含夹矸煤岩双向耦合作用机理及磨损特性研究[D]. 阜新: 辽宁工程技术大学, 2020. JIN X. Study on the two-way coupling mechanism and wear characteristics of shearer drum cutting coal-rock with gangue [D]. Fuxin: Liaoning Technical University, 2020. (in Chinese)
[38] 刘宏梅. 螺旋滚筒截割含夹矸煤岩动力传递规律及其性能优化研究[D]. 阜新: 辽宁工程技术大学, 2019. LIU H M. Research on dynamic force transfer law and performance optimization of spiral drum cutting coal containing dirt band [D]. Fuxin: Liaoning Technical University, 2019. (in Chinese)
[39] 张强, 张赫哲, 田莹, 等. 截齿辅助冲击作用下坚硬煤体的破碎特性[J]. 煤炭学报, 2022, 47(2): 1002-1016. ZHANG Q, ZHANG H Z, TIAN Y, et al. Crushing properties of hard coal under auxiliary impact by picks [J]. Journal of China Coal Society, 2022, 47(2): 1002-1016. (in Chinese)
[40] BIENIAWSKI Z T. Mechanism of brittle fracture of rock: Part I-theory of the fracture process [J]. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1967, 4(4): 395-406.
[41] LINDQVIST P, LAI H H, ALM O. Indentation fracture development in rock continuously observed with a scanning electron microscope [J]. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1984, 21(4): 165-182.
[42] SU O, AKCIN N A. Numerical simulation of rock cutting using the discrete element method [J]. International Journal of Rock Mechanics and Mining Sciences, 2011, 48(3): 434-442.
[43] 周游, 李国顺, 唐进元. 截齿截割煤岩的LS-DYNA仿真模拟[J]. 工程设计学报, 2011, 18(2): 103-108. ZHOU Y, LI G S, TANG J Y. Simulation and analysis for pick cutting rock by LS-DYNA [J]. Chinese Journal of Engineering Design, 2011, 18(2): 103-108. (in Chinese)
[44] JIANG H X, LIU S Y, DU C L, et al. Numerical simulation of rock fragmentation process by roadheader pick [J]. Journal of Vibroengineering, 2013, 15(4): 1807-1817.
[45] JIANG H X, MENG D G. 3D numerical modelling of rock fracture with a hybrid finite and cohesive element method [J]. Engineering Fracture Mechanics, 2018, 199: 280-293.
[46] ZIPF JR R K, BIENIAWSKI Z T. Estimating the crush zone size under a cutting tool in coal [J]. International Journal of Mining and Geological Engineering, 1988, 6(4): 279-295.
[47] 张志镇. 岩石变形破坏过程中的能量演化机制[D]. 徐州: 中国矿业大学, 2013. ZHANG Z Z. Energy evolution mechanism during rock deformation and failure [D]. Xuzhou: China University of Mining and Technology, 2013. (in Chinese)
[48] BAAFI E Y, RAMANI R V. Rank and maceral effects on coal dust generation [J]. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1979, 16(2): 107-115.
[49] MOORE M P, BISE C J. The relationship between the Hardgrove Grindability Index and the potential for respirable dust generation [R]. Morgantown: West Virginia University, 1984.
[50] ORGANISCAK J A, PAGE S J. Airborne dust liberation during coal crushing [J]. Coal Preparation, 2000, 21(5-6): 423-453.
[51] PHILLIPS H, BELLE B K. Quantification of inherent respirable dust generation potential (IRDGP) of South African Coals [R]. Johannesburg: University of Witwatersrand, 2003.
[52] BILGIN N, DEMIRCIN M A, COPUR H, et al. Dominant rock properties affecting the performance of conical picks and the comparison of some experimental and theoretical results [J]. International Journal of Rock Mechanics and Mining Sciences, 2006, 43(1): 139-156.
[53] KANG H, CHO J W, PARK J Y, et al. A new linear cutting machine for assessing the rock-cutting performance of a pick cutter [J]. International Journal of Rock Mechanics and Mining Sciences, 2016, 88: 129-136.
[54] 王自亮. 煤和岩石的产尘特性及其实验室测定[J]. 工业安全与防尘, 1995(7): 18-19. WANG Z L. Dust-producing properties of coal and rocks and their laboratory determination [J]. Industrial Safety and Environmental Protection, 1995(7): 18-19. (in Chinese)
[55] 郑钢镖, 康天合, 尹志宏, 等. 不同冲击形式下煤样产尘粒径分布规律研究[J]. 采矿与安全工程学报, 2007, 24(1): 96-100. ZHENG G B, KANG T H, YIN Z H, et al. Research on dust size distribution of coal impacted with different forms [J]. Journal of Mining & Safety Engineering, 2007, 24(1): 96-100. (in Chinese)
[56] 柴肇云, 康天合, 李清堂. 低级无烟煤冲击产尘特性的实验研究[J]. 矿业研究与开发, 2008, 28(4): 60-63. CAI Z Y, KANG T H, LI Q T. Experimental study on impacting dust characteristics of low-grade anthracite [J]. Mining Research and Development, 2008, 28(4): 60-63. (in Chinese)
[57] LIU S Y, DU C L, CUI X X, et al. Model test of the cutting properties of a shearer drum [J]. Mining Science and Technology (China), 2009, 19(1): 74-78.
[58] 刘送永, 杜长龙, 李建平. 煤截割粒度分布规律的分形特征[J]. 煤炭学报, 2009, 34(7): 977-982. LIU S Y, DU C L, LI J P. Fractal character of the distribution law of the cutting coal size [J]. Journal of China Coal Society, 2009, 34(7): 977-982. (in Chinese)
[59] 王亮, 廖晓雪, 朱金佗, 等. 煤矿采掘面产尘模拟分析实践教学系统研发及应用[J]. 实验技术与管理, 2022, 39(1): 157-161. WANG L, LIAO X X, ZHU J T, et al. Development and application of practical teaching system for simulation analysis of dust production in coal mining face [J]. Experimental Technology and Management, 2022, 39(1): 157-161. (in Chinese)
[60] 徐向宇. 综掘机截齿截割破煤机理及产尘规律研究[D]. 焦作: 河南理工大学, 2021. XU X Y. Study on coal breaking mechanism and dust generation law of roadheader pick [D]. Jiaozuo: Henan Polytechnic University, 2021. (in Chinese)
[61] PARK J Y, KANG H, LEE J W, et al. A study on rock cutting efficiency and structural stability of a point attack pick cutter by lab-scale linear cutting machine testing and finite element analysis [J]. International Journal of Rock Mechanics and Mining Sciences, 2018, 103: 215-229.
[62] 曹治. 截齿冲击破岩力学性能分析及其数值仿真[D]. 阜新: 辽宁工程技术大学, 2014. CAO Z. Impact mechanical properties analysis and numerical simulation of rock breaking by pick [D]. Fuxin: Liaoning Technical University, 2014. (in Chinese)
[63] MENEZES P L, LOVELL M R, AVDEEV I V, et al. Studies on the formation of discontinuous chips during rock cutting using an explicit finite element model [J]. The International Journal of Advanced Manufacturing Technology, 2014, 70(1-4): 635-648.
[64] MENEZES P L. Influence of cutter velocity, friction coefficient and rake angle on the formation of discontinuous rock fragments during rock cutting process [J]. The International Journal of Advanced Manufacturing Technology, 2017, 90(9): 3811-3827.
[65] ZHOU W D, WANG H T, ZHANG J Y, et al. A novel method for reducing the amount of dust produced by roadheaders based on the numerical simulation of coal breakage [J]. Fuel, 2023, 343: 127978.
[66] CUNDALL P A. BALL-A program to model granular media using the distinct element method [R]. London: Dames & Moore, Advanced Technology Group, 1978.
[67] 胡万瑞. 基于光滑节理模型的节理岩体力学特性研究[D]. 武汉: 武汉大学, 2017. HU W R. Research on mechnical behavior of jointed rock mass based on smooth-joint contact model [D]. Wuhan: Wuhan University, 2017. (in Chinese)
[68] ROJEK J, OÑATE E, LABRA C, et al. Discrete element simulation of rock cutting [J]. International Journal of Rock Mechanics and Mining Sciences, 2011, 48(6): 996-1010.
[69] ROEPKE W W, LINDROTH D P, MYREN T A. Reduction of dust and energy during coal cutting using point-attack bits, with an analysis of rotary cutting and development of a new cutting concept [R]. Twin Cities: Bureau of Mines, 1976.
[70] BENNETT J G, DICK J A, KAPLAN Y S, et al. The relationship between coal rank and the prevalence of pneumoconiosis [J]. British Journal of Industrial Medicine, 1979, 36(3): 206-210.
[71] SRIKANTH R, RAMANI R V. Single-breakage studies to determine the relationships between respirable dust generation and coal seam characteristics [J]. Applied Occupational and Environmental Hygiene, 1996, 11(7): 662-668.
[72] 黄声树, 王晋育, 冉文清. 煤的湿润效果与产尘能力的关系研究[J]. 煤炭工程师, 1996(2): 2-5. HUANG S H, WANG J Y, RAN W Q. Relation between wetting effect of coal and dust generation capacity [J]. Coal Engineer, 1996(2): 2-5. (in Chinese)
[73] 孟召平, 潘结南, 刘亮亮, 等. 含水量对沉积岩力学性质及其冲击倾向性的影响[J]. 岩石力学与工程学报, 2009, 28(S1): 2637-2643. MENG Z P, PAN J N, LIU L L, et al. Influence of moisture contents on mechanical properties of sedimentary rock and its bursting potential [J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(S1): 2637-2643. (in Chinese)
[74] NIE B S, LIU X F, YANG L L, et al. Pore structure characterization of different rank coals using gas adsorption and scanning electron microscopy [J]. Fuel, 2015, 158: 908-917.
[75] 王德明. 矿尘学[M]. 北京: 科学出版社, 2015. WANG D M. Mine dusts [M]. Beijing: Science Press, 2015. (in Chinese)
[76] 王德明. 矿井通风与安全[M]. 徐州: 中国矿业大学出版社, 2012. WANG D M. Mine ventilation and safety [M]. Xuzhou: China University of Mining and Technology Press, 2012. (in Chinese)
[77] PENG R D, YANG Y C, JU Y, et al. Computation of fractal dimension of rock pores based on gray CT images [J]. Chinese Science Bulletin, 2011, 56(31): 3346-3357.
[78] BAUD P, WONG T F, ZHU W. Effects of porosity and crack density on the compressive strength of rocks [J]. International Journal of Rock Mechanics and Mining Sciences, 2014, 67: 202-211.
[79] ZHANG Y L, SUN Q, HE H, et al. Pore characteristics and mechanical properties of sandstone under the influence of temperature [J]. Applied Thermal Engineering, 2017, 113: 537-543.
[80] ZHANG J X, DAVIS D M, WONG T F. The brittle-ductile transition in porous sedimentary rocks: Geological implications for accretionary wedge aseismicity [J]. Journal of Structural Geology, 1993, 15(7): 819-830.
[81] FAKHIMI A, ALAVI GHARAHBAGH E. Discrete element analysis of the effect of pore size and pore distribution on the mechanical behavior of rock [J]. International Journal of Rock Mechanics and Mining Sciences, 2011, 48(1): 77-85.
[82] CHEN X D, WU S X, ZHOU J K. Influence of porosity on compressive and tensile strength of cement mortar [J]. Construction and Building Materials, 2013, 40: 869-874.
[83] ZHOU W D, WANG H T, WANG D M, et al. The influence of pore structure of coal on characteristics of dust generation during the process of conical pick cutting [J]. Powder Technology, 2020, 363: 559-568.
[84] 孙海松. 滚筒截割煤体过程10 nm~10μm煤尘颗粒产尘特征实验研究[D]. 徐州: 中国矿业大学, 2023. SUN H S. Experimental study on the 10 nm~10μm coal dust particles generated by drum cutting coal body [D]. Xuzhou: China University of Mining and Technology, 2023. (in Chinese)
[85] SINGH S P. Brittleness and the mechanical winning of coal [J]. Mining Science and Technology, 1986, 3(3): 173-180.
[86] ATICI U, ERSOY A. Correlation of specific energy of cutting saws and drilling bits with rock brittleness and destruction energy [J]. Journal of Materials Processing Technology, 2009, 209(5): 2602-2612.
[87] ÖNZFIRAT M K, YEICE H, ŞIM ŞIR F, et al. A new approach to rock brittleness and its usability at prediction of drillability [J]. Journal of African Earth Sciences, 2016, 119: 94-101.
[88] DURSUN A E, GOKAY M K. Cuttability assessment of selected rocks through different brittleness values [J]. Rock Mechanics and Rock Engineering, 2016, 49(4): 1173-1190.
[89] YAGIZ S. Assessment of brittleness using rock strength and density with punch penetration test [J]. Tunnelling and Underground Space Technology, 2009, 24(1): 66-74.
[90] ZHANG D C, RANJITH P G, PERERA M S A. The brittleness indices used in rock mechanics and their application in shale hydraulic fracturing: A review [J]. Journal of Petroleum Science and Engineering, 2016, 143: 158-170.
[91] MENG F Z, ZHOU H, ZHANG C Q, et al. Evaluation methodology of brittleness of rock based on post-peak stress-strain curves [J]. Rock Mechanics and Rock Engineering, 2015, 48(5): 1787-1805.
[92] XIA Y J, LI L C, TANG C A, et al. A new method to evaluate rock mass brittleness based on stress-strain curves of class I [J]. Rock Mechanics and Rock Engineering, 2017, 50(5): 1123-1139.
[93] QUINN J B, QUINN G D. Indentation brittleness of ceramics: A fresh approach [J]. Journal of Materials Science, 1997, 32(16): 4331-4346.
[94] ABIOYE A V. Relationship of brittleness and fragmentation in brittle compression [J]. Engineering Geology, 2017, 221: 82-90.
[95] 冀佩琦, 张晓平, 张旗. 延脆性变化对隧道掘进机刀具破岩过程及其破坏模式影响的颗粒元模拟分析[J]. 岩土力学, 2016, 37(S2): 724-734. JI P Q, ZHANG X P, ZHANG Q. Partide flow code analysis of effect of ductility-brittleness change on TBM cutters rock fragmentation process and its failure mode [J]. Rock and Soil Mechanics, 2016, 37(S2): 724-734. (in Chinese)
[96] GONG Q M, ZHAO J. Influence of rock brittleness on TBM penetration rate in Singapore granite [J]. Tunnelling and Underground Space Technology, 2007, 22(3): 317-324.
[97] LI X F, WANG S B, GE S R, et al. Investigation on the influence mechanism of rock brittleness on rock fragmentation and cutting performance by discrete element method [J]. Measurement, 2018, 113: 120-130.
[98] ZHOU W D, WANG H T, WANG D M, et al. An experimental investigation on the influence of coal brittleness on dust generation [J]. Powder Technology, 2020, 364(48): 457-466.
[99] 徐小奔. 综采工作面煤岩截割产尘特征及影响因素研究[D]. 淮南: 安徽理工大学, 2020. XU X B. Study on the characteristics and influencing factors of coal and rock cutting dust generation in fully mechanized mining face [D]. Huainan: Anhui University of Science & Technology, 2020. (in Chinese)
[100] 郝学. 综掘工作面煤体破碎产尘规律研究[D]. 淮南: 安徽理工大学, 2020. HAO X. Research on the law of coal body fragmentation and dust fragmentation and dust generation in fully mechanized excavation face [D]. Huainan: Anhui University of Science & Technology, 2020. (in Chinese)
[101] 赵文彬, 乔善成, 王金凤, 等. 焦煤产尘粒径分布特征与产尘规律分析[J]. 煤炭科学技术, 2016, 44(6): 164-168. ZHAO W B, QIAO S C, WANG J F, et al. Analysis of particles size distribution characteristics and dust producing rules of coking coal [J]. Coal Science and Technology, 2016, 44(6): 164-168. (in Chinese)
[102] 李晓豁. 采煤机截割产尘的数学模型[J]. 辽宁工程技术大学学报, 2002, 21(6): 776-779. LI X H. Mathematical model of cutting dust for a shearer [J]. Journal of Liaoning Technical University, 2002, 21(6): 776-779. (in Chinese)
[103] STREBIG K C, ZELLER H W. Effect of depth of cut and bit type on the generation of respirable dust [R]. Twin Cities: Bureau of Mines, 1975.
[104] FOWELL R J, OCHEI N N. A comparison of dust make and energy requirements for rock cutting tools [J]. International Journal of Mining Engineering, 1984, 2(1): 73-83.
[105] 赵益芳, 朱国宏. 减少产尘的采煤机参数改进途径[J]. 山西矿业学院学报, 1996, 14(1): 76-82. ZHAO Y F, ZHU G H. Seeking ways to improve parameters of drum shearer in order to reduce dust generation [J]. Shanxi Mining Institute Learned Journal, 1996, 14(1): 76-82. (in Chinese)
[106] LI X H, LIU S M, HUANG Z L, et al. Study of the effects of shearer' kinematic parameters on on-way distribution of dust on coal face [J]. Applied Mechanics and Materials, 2011, 127: 400-405.
[107] 谭聪, 蒋仲安, 陈举师, 等. 综采割煤粉尘运移影响因素的数值模拟[J]. 北京科技大学学报, 2014, 36(6): 716-721. TAN C, JIANG Z A, CHEN J S, et al. Numerical simulation of influencing factors on dust movement during coal cutting at fully mechanized working faces [J]. Journal of University of Science and Technology Beijing, 2014, 36(6): 716-721. (in Chinese)
[108] LIU X H, LIU S Y, TANG P. Coal fragment size model in cutting process [J]. Powder Technology, 2015, 272(2): 282-289.
[109] SHEN W H, HARDY R H, KHAIR W A. Laboratory study of acoustic emission and particle size distribution during rotary cutting [J]. International Journal of Rock Mechanics and Mining Sciences, 1997, 34(3-4): 121.e1-121.e16.
[110] 张艳娇. 综掘机镐型截齿截割破碎产尘实验研究[D]. 焦作: 河南理工大学, 2021. ZHANG Y J. Experimental study on crushing and dust production by pick cutting teeth of comprehensive excavator [D]. Jiaozuo: Henan Polytechnic University, 2021. (in Chinese)
[111] 李雪峰. 深部煤岩截割理论与实验研究[D]. 徐州: 中国矿业大学, 2018. LI X F. Theoretical and experimental study on rock cutting in deep mining [D]. Xuzhou: China University of Mining and Technology, 2018. (in Chinese)
[112] ZHOU W D, WANG H T, WANG D M, et al. The effect of geometries and cutting parameters of conical pick on the characteristics of dust generation: Experimental investigation and theoretical exploration [J]. Fuel Processing Technology, 2020, 198: 106243.
[113] 刘晓辉. 镐型截齿与煤岩互作用力学与磨损特性研究[D]. 徐州: 中国矿业大学, 2016. LIU X H. Research on mechanical and wear characteristic of conical pick interacted with coal-rock [D]. Xuzhou: China University of Mining and Technology, 2016. (in Chinese)
[114] 张倩倩, 韩振南, 张梦奇, 等. 截齿破岩机制及截线间距优化实验研究[J]. 岩土力学, 2016, 37(8): 2172-2179. ZHANG Q Q, HAN Z N, ZHANG M Q, et al. Experimental study of breakage mechanisms of rock induced by a pick and associated cutter spacing optimization [J]. Rock and Soil Mechanics, 2016, 37(8): 2172-2179. (in Chinese)
Outlines

/