Formation Mechanism of “Large-Area Sweating” Water Seepage from Deep Mine Sandstone Pores
The groundwater in nonkarst areas can be divided into two categories: pore water and fracture water. Unlike fracture seepage, sandstone pore seepage in deep mines manifests as a large area of “sweating,” rather than an area of local “spray,” and is difficult to plug via conventional grouting methods...
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2022/9937278 |
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| author | Yanzhi Li Weiguo Qiao Yue Wu Xungang Li Shuai Zhang Xiaoli Zhang |
| author_facet | Yanzhi Li Weiguo Qiao Yue Wu Xungang Li Shuai Zhang Xiaoli Zhang |
| author_sort | Yanzhi Li |
| collection | DOAJ |
| description | The groundwater in nonkarst areas can be divided into two categories: pore water and fracture water. Unlike fracture seepage, sandstone pore seepage in deep mines manifests as a large area of “sweating,” rather than an area of local “spray,” and is difficult to plug via conventional grouting methods. This study focused on pore seepage in deep mine sandstone to improve the grouting effect. Taking the deep mine sandstone in the southwest Shandong coal field, where “large-area sweating” seepage occurs, as the study object, this study examined the pore structure, petrological characteristics, physical properties, and grain sizes of the sandstone by analyzing experimental data from thin sections and scanning electron microscopy samples. The formation mechanism of the “large-area sweating” seepage was then analyzed. The range of permeability in which “large-area sweating” seepage may occur in the sandstone was discussed. The results indicate that the process of “large-area sweating” seepage in deep mine sandstone can be divided into a matrix softening stage, a matrix erosion stage, and a “large-area sweating” water seepage formation stage. According to the case analysis on the “large-area sweating” seepage in the Tangkou coal mine of the Southwest Shandong coalfield, the lower limit of permeability of the “large-area sweating” sandstone is approximately 0.25 mD. Thus, this type of seepage can occur in deep mine sandstone with a permeability of greater than 0.25 mD and affect typical mining production. The results of this study provide information about the formation mechanism of “large-area sweating” water seepage from sandstone pores and can theoretically inform the development of a new permeation grouting technique. |
| format | Article |
| id | doaj-art-302ac40a68294ca0a6f1c96c90d3157b |
| institution | Kabale University |
| issn | 1468-8123 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-302ac40a68294ca0a6f1c96c90d3157b2025-02-03T01:07:56ZengWileyGeofluids1468-81232022-01-01202210.1155/2022/9937278Formation Mechanism of “Large-Area Sweating” Water Seepage from Deep Mine Sandstone PoresYanzhi Li0Weiguo Qiao1Yue Wu2Xungang Li3Shuai Zhang4Xiaoli Zhang5School of Civil Engineering and ArchitectureSchool of Civil Engineering and ArchitectureSchool of Civil Engineering and ArchitectureSchool of Civil Engineering and ArchitectureSchool of Civil EngineeringSchool of Civil EngineeringThe groundwater in nonkarst areas can be divided into two categories: pore water and fracture water. Unlike fracture seepage, sandstone pore seepage in deep mines manifests as a large area of “sweating,” rather than an area of local “spray,” and is difficult to plug via conventional grouting methods. This study focused on pore seepage in deep mine sandstone to improve the grouting effect. Taking the deep mine sandstone in the southwest Shandong coal field, where “large-area sweating” seepage occurs, as the study object, this study examined the pore structure, petrological characteristics, physical properties, and grain sizes of the sandstone by analyzing experimental data from thin sections and scanning electron microscopy samples. The formation mechanism of the “large-area sweating” seepage was then analyzed. The range of permeability in which “large-area sweating” seepage may occur in the sandstone was discussed. The results indicate that the process of “large-area sweating” seepage in deep mine sandstone can be divided into a matrix softening stage, a matrix erosion stage, and a “large-area sweating” water seepage formation stage. According to the case analysis on the “large-area sweating” seepage in the Tangkou coal mine of the Southwest Shandong coalfield, the lower limit of permeability of the “large-area sweating” sandstone is approximately 0.25 mD. Thus, this type of seepage can occur in deep mine sandstone with a permeability of greater than 0.25 mD and affect typical mining production. The results of this study provide information about the formation mechanism of “large-area sweating” water seepage from sandstone pores and can theoretically inform the development of a new permeation grouting technique.http://dx.doi.org/10.1155/2022/9937278 |
| spellingShingle | Yanzhi Li Weiguo Qiao Yue Wu Xungang Li Shuai Zhang Xiaoli Zhang Formation Mechanism of “Large-Area Sweating” Water Seepage from Deep Mine Sandstone Pores Geofluids |
| title | Formation Mechanism of “Large-Area Sweating” Water Seepage from Deep Mine Sandstone Pores |
| title_full | Formation Mechanism of “Large-Area Sweating” Water Seepage from Deep Mine Sandstone Pores |
| title_fullStr | Formation Mechanism of “Large-Area Sweating” Water Seepage from Deep Mine Sandstone Pores |
| title_full_unstemmed | Formation Mechanism of “Large-Area Sweating” Water Seepage from Deep Mine Sandstone Pores |
| title_short | Formation Mechanism of “Large-Area Sweating” Water Seepage from Deep Mine Sandstone Pores |
| title_sort | formation mechanism of large area sweating water seepage from deep mine sandstone pores |
| url | http://dx.doi.org/10.1155/2022/9937278 |
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