Research on Cutting Characteristics of Rock Plate with Two Sides Fixed and Two Sides Free
Conical pick wear is an urgent problem in the roadway excavation caused by hard rock difficult to break. The traditional method of increasing cutting power to improve cutting performance of conical pick significantly increases pick wear. In the paper, a saw blade and conical pick combined cutting me...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/4198010 |
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| author | Zhenguo Lu Qingliang Zeng Zhihai Liu Guanshun Gao Peisi Zhong |
| author_facet | Zhenguo Lu Qingliang Zeng Zhihai Liu Guanshun Gao Peisi Zhong |
| author_sort | Zhenguo Lu |
| collection | DOAJ |
| description | Conical pick wear is an urgent problem in the roadway excavation caused by hard rock difficult to break. The traditional method of increasing cutting power to improve cutting performance of conical pick significantly increases pick wear. In the paper, a saw blade and conical pick combined cutting method is proposed based on increased free surface. To research the fracture morphology and cutting force of rock plate, theoretical, numerical, and experimental methods are used. By theoretical research, the bending mechanical model of rock plate bending is established. The cutting position and the junction between the free sides and fixed sides are preferentially broken. A numerical model combining the erosion and damage constitutive model is built, and the cutting process of rock plate was presented. According to rock plate experiment, the peak cutting force increases with the increasing uniaxial compressive strength, thickness of rock plate, and cutting depth of conical pick and decreases with the increasing width and height of rock plate. Exponential relationships exist between peak cutting force and thickness, width and height of rock plate, and cutting depth of conical pick. Linear relationship exists between peak cutting force and uniaxial compressive strength. The size of rock fragments increases with uniaxial compressive strength, width, and height of rock plate. |
| format | Article |
| id | doaj-art-ae99b926fd6c4983a5dc863d3dc71bd2 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-ae99b926fd6c4983a5dc863d3dc71bd22025-02-03T01:00:39ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/41980104198010Research on Cutting Characteristics of Rock Plate with Two Sides Fixed and Two Sides FreeZhenguo Lu0Qingliang Zeng1Zhihai Liu2Guanshun Gao3Peisi Zhong4College of Transportation, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Transportation, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaConical pick wear is an urgent problem in the roadway excavation caused by hard rock difficult to break. The traditional method of increasing cutting power to improve cutting performance of conical pick significantly increases pick wear. In the paper, a saw blade and conical pick combined cutting method is proposed based on increased free surface. To research the fracture morphology and cutting force of rock plate, theoretical, numerical, and experimental methods are used. By theoretical research, the bending mechanical model of rock plate bending is established. The cutting position and the junction between the free sides and fixed sides are preferentially broken. A numerical model combining the erosion and damage constitutive model is built, and the cutting process of rock plate was presented. According to rock plate experiment, the peak cutting force increases with the increasing uniaxial compressive strength, thickness of rock plate, and cutting depth of conical pick and decreases with the increasing width and height of rock plate. Exponential relationships exist between peak cutting force and thickness, width and height of rock plate, and cutting depth of conical pick. Linear relationship exists between peak cutting force and uniaxial compressive strength. The size of rock fragments increases with uniaxial compressive strength, width, and height of rock plate.http://dx.doi.org/10.1155/2020/4198010 |
| spellingShingle | Zhenguo Lu Qingliang Zeng Zhihai Liu Guanshun Gao Peisi Zhong Research on Cutting Characteristics of Rock Plate with Two Sides Fixed and Two Sides Free Advances in Materials Science and Engineering |
| title | Research on Cutting Characteristics of Rock Plate with Two Sides Fixed and Two Sides Free |
| title_full | Research on Cutting Characteristics of Rock Plate with Two Sides Fixed and Two Sides Free |
| title_fullStr | Research on Cutting Characteristics of Rock Plate with Two Sides Fixed and Two Sides Free |
| title_full_unstemmed | Research on Cutting Characteristics of Rock Plate with Two Sides Fixed and Two Sides Free |
| title_short | Research on Cutting Characteristics of Rock Plate with Two Sides Fixed and Two Sides Free |
| title_sort | research on cutting characteristics of rock plate with two sides fixed and two sides free |
| url | http://dx.doi.org/10.1155/2020/4198010 |
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