Experimental Analysis of Pressure Relief Effect of Surrounding Rock in High-Stress Roadways under Different Drilling Parameters
Drilling to relieve pressure is a simple and efficient solution to prevent impact ground pressure for the engineering problem of the high risk of impact on the surrounding rock of high stress roads, and choosing suitable drilling parameters is the key to it. The unloading law of borehole diameter, d...
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| Format: | Article |
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MDPI AG
2023-02-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/4/2511 |
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| author | Ping Wang Yongzhi Jiang Peng Li Jinlian Zhou Ze Zhou |
| author_facet | Ping Wang Yongzhi Jiang Peng Li Jinlian Zhou Ze Zhou |
| author_sort | Ping Wang |
| collection | DOAJ |
| description | Drilling to relieve pressure is a simple and efficient solution to prevent impact ground pressure for the engineering problem of the high risk of impact on the surrounding rock of high stress roads, and choosing suitable drilling parameters is the key to it. The unloading law of borehole diameter, depth, and spacing was investigated using a combination of indoor tests, numerical simulations, and theoretical analysis. The characteristics of crack extension and plastic zone changes of the three were analyzed, and the relationship between boreholes and elastic strain energy was derived by developing a hole mechanics model. The findings indicate that as drilling radius and depth are increased, peak strength and the elastic strain energy stored in front of the peak decrease, the plastic zone around the hole and the main control crack on the surface of the block expand more obviously, and the vertical stress at the top and bottom of the hole decrease, and the peak stress increases with the depth of the hole. The plastic zone surrounding the hole is attached to one another more easily the closer the drilling spacing is. The test block is changed from independent damage to penetrating damage when the drilling spacing is less than or equal to 3.286 cm. However, the pressure release effect does not necessarily improve with narrower drilling spacing. The plastic zone radius and the elastic strain energy held in the rock body are linked to each other linearly and quadratically, respectively, by the drilling radius. The joint pressure relief of several holes should be prioritized when drilling pressure is relieved, and then the hole’s diameter should be increased, and, finally, the hole’s depth should be increased. A reference for engineering applications is provided by this. |
| first_indexed | 2024-03-11T09:11:39Z |
| format | Article |
| id | doaj.art-0d0b4d882de44ed88e4b3d1a1dceb18f |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T09:11:39Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-0d0b4d882de44ed88e4b3d1a1dceb18f2023-11-16T18:56:48ZengMDPI AGApplied Sciences2076-34172023-02-01134251110.3390/app13042511Experimental Analysis of Pressure Relief Effect of Surrounding Rock in High-Stress Roadways under Different Drilling ParametersPing Wang0Yongzhi Jiang1Peng Li2Jinlian Zhou3Ze Zhou4School of Resources, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaSchool of Resources, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaSchool of Resources, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaGuizhou Panjiang Refined Coal Co., Ltd., Liupanshui 553536, ChinaInstitute of Mining Engineering, Guizhou lnstitute of Technology, Guiyang 550003, ChinaDrilling to relieve pressure is a simple and efficient solution to prevent impact ground pressure for the engineering problem of the high risk of impact on the surrounding rock of high stress roads, and choosing suitable drilling parameters is the key to it. The unloading law of borehole diameter, depth, and spacing was investigated using a combination of indoor tests, numerical simulations, and theoretical analysis. The characteristics of crack extension and plastic zone changes of the three were analyzed, and the relationship between boreholes and elastic strain energy was derived by developing a hole mechanics model. The findings indicate that as drilling radius and depth are increased, peak strength and the elastic strain energy stored in front of the peak decrease, the plastic zone around the hole and the main control crack on the surface of the block expand more obviously, and the vertical stress at the top and bottom of the hole decrease, and the peak stress increases with the depth of the hole. The plastic zone surrounding the hole is attached to one another more easily the closer the drilling spacing is. The test block is changed from independent damage to penetrating damage when the drilling spacing is less than or equal to 3.286 cm. However, the pressure release effect does not necessarily improve with narrower drilling spacing. The plastic zone radius and the elastic strain energy held in the rock body are linked to each other linearly and quadratically, respectively, by the drilling radius. The joint pressure relief of several holes should be prioritized when drilling pressure is relieved, and then the hole’s diameter should be increased, and, finally, the hole’s depth should be increased. A reference for engineering applications is provided by this.https://www.mdpi.com/2076-3417/13/4/2511rock burstdrilling pressure reliefdrilling parametersrock mass strengthplastic zone |
| spellingShingle | Ping Wang Yongzhi Jiang Peng Li Jinlian Zhou Ze Zhou Experimental Analysis of Pressure Relief Effect of Surrounding Rock in High-Stress Roadways under Different Drilling Parameters Applied Sciences rock burst drilling pressure relief drilling parameters rock mass strength plastic zone |
| title | Experimental Analysis of Pressure Relief Effect of Surrounding Rock in High-Stress Roadways under Different Drilling Parameters |
| title_full | Experimental Analysis of Pressure Relief Effect of Surrounding Rock in High-Stress Roadways under Different Drilling Parameters |
| title_fullStr | Experimental Analysis of Pressure Relief Effect of Surrounding Rock in High-Stress Roadways under Different Drilling Parameters |
| title_full_unstemmed | Experimental Analysis of Pressure Relief Effect of Surrounding Rock in High-Stress Roadways under Different Drilling Parameters |
| title_short | Experimental Analysis of Pressure Relief Effect of Surrounding Rock in High-Stress Roadways under Different Drilling Parameters |
| title_sort | experimental analysis of pressure relief effect of surrounding rock in high stress roadways under different drilling parameters |
| topic | rock burst drilling pressure relief drilling parameters rock mass strength plastic zone |
| url | https://www.mdpi.com/2076-3417/13/4/2511 |
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