Migration law for random parameters rockfall in steeply dipping coal seams
The migration process of rockfall has certain complexity and randomness in steeply dipping coal seams (SDCS). The three-dimensional random migration of rockfall with random parameters cannot be accurately simulated. Taking the transport process of arbitrarily shaped rockfall formed by roof leakage i...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2023-02-01
|
| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2023.1088188/full |
| _version_ | 1797894262871818240 |
|---|---|
| author | Ming Liu Ming Liu Jie Chen Yang Xiao Wenyu Lv |
| author_facet | Ming Liu Ming Liu Jie Chen Yang Xiao Wenyu Lv |
| author_sort | Ming Liu |
| collection | DOAJ |
| description | The migration process of rockfall has certain complexity and randomness in steeply dipping coal seams (SDCS). The three-dimensional random migration of rockfall with random parameters cannot be accurately simulated. Taking the transport process of arbitrarily shaped rockfall formed by roof leakage in steep seam working face as the research object, a method for generating rockfall with the random shape of irregular polyhedrons based on the ellipsoid equation is provided. And based on the geographic information system data, such as the contour line of the bottom floor of the working face, the 3D grid model of the bottom floor is established. The random transport process of rockfall in three-dimensional mining space was simulated using Monte Carlo random simulation technology combined with the energy tracking method (ETM) to compile the program, considering the randomness of collision recovery coefficient and friction coefficient between rockfall and working face floor. The influence of randomness of parameters on the migration velocity, angular velocity and energy of rockfall is analyzed. With the increase of the coefficient of variation of parameters, the influence of the randomness of the parameters on the transport characteristics of rockfall becomes greater. The impact of the collision recovery coefficient on the migration process of rockfall is much more significant than that of the friction coefficient. The offset ratio of rockfall increases with the increase of the variation coefficient. The method presented in this paper can be used to simulate the motion of rockfall more accurately, and a theoretical basis is provided for predicting and protecting rockfall hazards. |
| first_indexed | 2024-04-10T07:06:10Z |
| format | Article |
| id | doaj.art-6f1e25611b674e5fb0c9509214acfb68 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-10T07:06:10Z |
| publishDate | 2023-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-6f1e25611b674e5fb0c9509214acfb682023-02-27T07:58:23ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-02-011110.3389/feart.2023.10881881088188Migration law for random parameters rockfall in steeply dipping coal seamsMing Liu0Ming Liu1Jie Chen2Yang Xiao3Wenyu Lv4State Key Laboratory of Green and Low-Carbon Development of Tar-Rich Coal in Western China, Xi’an University of Science and Technology, Xi’an, ChinaCollege of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an, ChinaCollege of Energy Engineering, Xi’an University of Science and Technology, Xi’an, ChinaCollege of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an, ChinaCollege of Energy Engineering, Xi’an University of Science and Technology, Xi’an, ChinaThe migration process of rockfall has certain complexity and randomness in steeply dipping coal seams (SDCS). The three-dimensional random migration of rockfall with random parameters cannot be accurately simulated. Taking the transport process of arbitrarily shaped rockfall formed by roof leakage in steep seam working face as the research object, a method for generating rockfall with the random shape of irregular polyhedrons based on the ellipsoid equation is provided. And based on the geographic information system data, such as the contour line of the bottom floor of the working face, the 3D grid model of the bottom floor is established. The random transport process of rockfall in three-dimensional mining space was simulated using Monte Carlo random simulation technology combined with the energy tracking method (ETM) to compile the program, considering the randomness of collision recovery coefficient and friction coefficient between rockfall and working face floor. The influence of randomness of parameters on the migration velocity, angular velocity and energy of rockfall is analyzed. With the increase of the coefficient of variation of parameters, the influence of the randomness of the parameters on the transport characteristics of rockfall becomes greater. The impact of the collision recovery coefficient on the migration process of rockfall is much more significant than that of the friction coefficient. The offset ratio of rockfall increases with the increase of the variation coefficient. The method presented in this paper can be used to simulate the motion of rockfall more accurately, and a theoretical basis is provided for predicting and protecting rockfall hazards.https://www.frontiersin.org/articles/10.3389/feart.2023.1088188/fullsteeply dipping coal seamrockfallthe energy tracking methodmigrationrandom parameters |
| spellingShingle | Ming Liu Ming Liu Jie Chen Yang Xiao Wenyu Lv Migration law for random parameters rockfall in steeply dipping coal seams Frontiers in Earth Science steeply dipping coal seam rockfall the energy tracking method migration random parameters |
| title | Migration law for random parameters rockfall in steeply dipping coal seams |
| title_full | Migration law for random parameters rockfall in steeply dipping coal seams |
| title_fullStr | Migration law for random parameters rockfall in steeply dipping coal seams |
| title_full_unstemmed | Migration law for random parameters rockfall in steeply dipping coal seams |
| title_short | Migration law for random parameters rockfall in steeply dipping coal seams |
| title_sort | migration law for random parameters rockfall in steeply dipping coal seams |
| topic | steeply dipping coal seam rockfall the energy tracking method migration random parameters |
| url | https://www.frontiersin.org/articles/10.3389/feart.2023.1088188/full |
| work_keys_str_mv | AT mingliu migrationlawforrandomparametersrockfallinsteeplydippingcoalseams AT mingliu migrationlawforrandomparametersrockfallinsteeplydippingcoalseams AT jiechen migrationlawforrandomparametersrockfallinsteeplydippingcoalseams AT yangxiao migrationlawforrandomparametersrockfallinsteeplydippingcoalseams AT wenyulv migrationlawforrandomparametersrockfallinsteeplydippingcoalseams |