|
| Research on optimization of mining sequence and stability control in sublevel drilling-stage room and subsequent filling mining |
|
Received:October 10, 2025
Revised:November 03, 2025
Accepted:November 20, 2025
Published Online:April 30, 2026
|
| View Full Text View/Add Comment Download reader |
| DOI：10.3969/j.issn.1005-7854.2026.02.004 |
| KeyWord:sublevel drilling-stage room and subsequent filling method;mining sequence;numerical simulation;plan optimization;mining stability control |
|
| 1.Zijin Mining Group Co., Ltd., Shanghang 364200, Fujian, China;2.Shanxi Zijin Mining Group Co., Ltd., Fanshi 034300, Shanxi, China;3.BGRIMM Technology Group, Beijing 100160, China |
| Hits: 40 |
| Download times: 6 |
| Abstract: |
| To address the challenge of unclear geostatic pressure behavior and ambiguous influence zones in porphyry ore body mining, which restricts safe and efficient mining operations, this study focuses on the engineering context of the 1-6# exploration lines at Shanxi Zijin Mining's porphyry gold deposit. Two single-level mining sequence schemes are proposed: Scheme Ⅰ "Sequential Panel Succession" and Scheme Ⅱ "Alternate Panel Succession". Additionally, four adjacent-level mining sequence schemes are introduced: Scheme Ⅲ "Aligned Stope Mining in Adjacent Panels", Scheme Ⅳ "Staggered Stope Mining in Adjacent Panels", Scheme Ⅴ "Alternate Stope Mining in Adjacent Panels", and Scheme Ⅵ "Alternate Panel and Stope Mining". Through the establishment of a three-dimensional numerical model, a numerical analysis was conducted for these six different schemes of the open stoping with subsequent backfill method. The results showed that under the single stage mining condition, the main mechanical states of Scheme 1 and Scheme 2 were similar. Among them, Scheme 1 had a maximum shear stress of 32.7 MPa, which was 0.1 MPa lower than Scheme 2, and a maximum deformation of 8.11 cm, which was only 0.05 cm smaller than Scheme 2. From the distribution of plastic zones, Scheme 2 had similar plastic deformation. The large volume and uneven dispersion of the area are difficult to control; Under the synchronous mining conditions of adjacent stages, Scheme 3 has better indicators, Schemes 4 and 5 have strong mechanical responses, and Scheme 6 shows the best stability, with a maximum shear stress of 27.1 MPa, a maximum deformation of 7.32 cm, and the plastic zone volume of 35 397.03 m3 being the lowest, and the plastic zone distribution is more dispersed. In the sublevel drilling-stage room and subsequent filling method, adjacent panels should be sequentially connected in a single stage, and adjacent stages should be synchronously mined with interval panels, which can effectively control the stability of the mining area. The research results can provide theoretical support and engineering reference for optimizing the mining sequence and stability control of similar mines. |
| Close |
|
|
|