Abutment Pressure Distribution Law and Support Analysis of Super Large Mining Height Face
Bibliographic Data
| ID | 15469622 |
|---|---|
| Authors | Libo Zhang (0000-0001-6840-8780, Shandong University of Science and Technology), Wenlong Shen (0000-0002-5021-0183, Henan Polytechnic University, corresponding author), Xuelong Li (0000-0003-2924-946X, Henan Polytechnic University, corresponding author), Yabo Wang (0000-0002-6529-4631, Shandong University of Science and Technology), Qizhi Qin (Shandong Lianxing Energy Group (China)), Xutao Lu (Shandong Lianxing Energy Group (China)), Tianxi Xue |
| Year | 2022 |
| Volume | 20 |
| Issue | 1 |
| Pages | 227-227 |
| Publication date | 2022-12-23 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | International Journal of Environmental Research and Public Health (JOURNAL) |
| Journal identifiers | ISSN: 1661-7827 • E-ISSN: 1660-4601 |
| Publisher | Multidisciplinary Digital Publishing Institute (PUBLISHER • CH) |
| DOI | 10.3390/ijerph20010227 |
| PMID | 36612548 |
| OpenAlex | W4313260050 |
| Language | EN |
| Citations received | 1 |
Under the condition of the shallow coal seam, the laws of roof activity after large mining height longwall face mining and prevention measures for large-area roof weighting are problems that need to be solved urgently. In the background of the super large mining height working face in the upper 108 working face of Jinjitan Coal Mine 12-2, the spatial distribution characteristics of the development and change of the mining-induced abutment pressure and the related support design in the 8.2 m super large mining height and fully mechanized mining face were conducted. It reveals the distribution characteristics of the dynamic stress field and internal and external stress fields. The influence range of the abutment pressure of the super high mining height working face was measured on site. The numerical simulation is carried out, the roadway support structure is analyzed, and the improvement measures are proposed. The research results demonstrate that: The influence range of abutment pressure is 234 m, the obvious influence range of the leading pressure is 47-60 m, and the peak position of the influence of the leading pressure is 15-20 m. The 5 m range is the lateral inward stress field of the coal pillar, the 10-15 m range is the outward stress field of the coal pillar, and the 20 m range is the original rock stress field of the coal pillar. Therefore, it is proposed that the reasonable size of the coal pillar for roadway protection is 20-22 m. Adjusting the distance between screw steel and FRP bolts from 1000 mm to 1200 mm, the length of the roof prestressed anchor cable should be appropriately reduced to 5.5-6 m according to the lithology of the roof
Abutment · Coal · Coal mining · Distribution law · Face (sociological concept · Finite element method · Geotechnical engineering · Longwall mining · Mining engineering · Pillar · Range (aeronautics · Roof · Stress (linguistics · Stress field · Structural engineering · Weighting · Engineering · Geomechanics and Mining Engineering · Geotechnical Engineering and Analysis · Rock Mechanics and Modeling · Geology
| Unique citing works | 1 |
|---|---|
| Citations per year | 0,33 |
| Citation span | 2023 - 2023 (1) |
| Citation velocity | historical |
| Highly cited | No |
| Citation types | Neutral: 1 |