Mechanical Properties of the Hard Sandstone Fracture Surface under Hydrochemical Corrosion
To realize a quantitative expression of change laws of the fracture surface shear strength with hydrochemical damage and to obtain optimal weakening effect of solution on the fracture surface strength, hard roof sandstone specimens containing hydraulic fracture surfaces from the Tashan Coal Mine loc...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Journal of Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/4807104 |
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| author | Bin-wei Xia Ming-xiang Xu Chao Pan |
| author_facet | Bin-wei Xia Ming-xiang Xu Chao Pan |
| author_sort | Bin-wei Xia |
| collection | DOAJ |
| description | To realize a quantitative expression of change laws of the fracture surface shear strength with hydrochemical damage and to obtain optimal weakening effect of solution on the fracture surface strength, hard roof sandstone specimens containing hydraulic fracture surfaces from the Tashan Coal Mine located in Datong were subjected to a shear test after corrosion using solutions at different concentrations. The relational expression between shear strength and porosity of the fracture surface was established, and new damage parameters were introduced to describe the evolution laws of the shear strength of sandstone specimens with change in test conditions. Results were as follows. (1) Under sealed hydrochemical environment, corrosion effect on sandstone strengthened, and porosity and roughness gradually increased with increasing solution concentration and soaking time. (2) At a solution concentration of 3%-10%, shear strength and roughness of the fracture surface initially increased and then decreased. Hydrochemical solution concentration and action time were important factors that caused strength attenuation of the fracture surface. (3) When the solution concentration was greater than 3%, the roughness of the fracture surface increased with corrosion time, but its strength showed the tendency to stabilize. The shear strength of the fracture surface increased with shear displacement at a concentration of 5%. The study results can provide a new idea for strong strata pressure control through ground hydrofracturing hard roof. |
| format | Article |
| id | doaj-art-029dd0e1ff5e4b9da390412a7eec224f |
| institution | Kabale University |
| issn | 2314-4904 2314-4912 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Engineering |
| spelling | doaj-art-029dd0e1ff5e4b9da390412a7eec224f2025-08-20T03:54:16ZengWileyJournal of Engineering2314-49042314-49122019-01-01201910.1155/2019/48071044807104Mechanical Properties of the Hard Sandstone Fracture Surface under Hydrochemical CorrosionBin-wei Xia0Ming-xiang Xu1Chao Pan2State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, ChinaTo realize a quantitative expression of change laws of the fracture surface shear strength with hydrochemical damage and to obtain optimal weakening effect of solution on the fracture surface strength, hard roof sandstone specimens containing hydraulic fracture surfaces from the Tashan Coal Mine located in Datong were subjected to a shear test after corrosion using solutions at different concentrations. The relational expression between shear strength and porosity of the fracture surface was established, and new damage parameters were introduced to describe the evolution laws of the shear strength of sandstone specimens with change in test conditions. Results were as follows. (1) Under sealed hydrochemical environment, corrosion effect on sandstone strengthened, and porosity and roughness gradually increased with increasing solution concentration and soaking time. (2) At a solution concentration of 3%-10%, shear strength and roughness of the fracture surface initially increased and then decreased. Hydrochemical solution concentration and action time were important factors that caused strength attenuation of the fracture surface. (3) When the solution concentration was greater than 3%, the roughness of the fracture surface increased with corrosion time, but its strength showed the tendency to stabilize. The shear strength of the fracture surface increased with shear displacement at a concentration of 5%. The study results can provide a new idea for strong strata pressure control through ground hydrofracturing hard roof.http://dx.doi.org/10.1155/2019/4807104 |
| spellingShingle | Bin-wei Xia Ming-xiang Xu Chao Pan Mechanical Properties of the Hard Sandstone Fracture Surface under Hydrochemical Corrosion Journal of Engineering |
| title | Mechanical Properties of the Hard Sandstone Fracture Surface under Hydrochemical Corrosion |
| title_full | Mechanical Properties of the Hard Sandstone Fracture Surface under Hydrochemical Corrosion |
| title_fullStr | Mechanical Properties of the Hard Sandstone Fracture Surface under Hydrochemical Corrosion |
| title_full_unstemmed | Mechanical Properties of the Hard Sandstone Fracture Surface under Hydrochemical Corrosion |
| title_short | Mechanical Properties of the Hard Sandstone Fracture Surface under Hydrochemical Corrosion |
| title_sort | mechanical properties of the hard sandstone fracture surface under hydrochemical corrosion |
| url | http://dx.doi.org/10.1155/2019/4807104 |
| work_keys_str_mv | AT binweixia mechanicalpropertiesofthehardsandstonefracturesurfaceunderhydrochemicalcorrosion AT mingxiangxu mechanicalpropertiesofthehardsandstonefracturesurfaceunderhydrochemicalcorrosion AT chaopan mechanicalpropertiesofthehardsandstonefracturesurfaceunderhydrochemicalcorrosion |