Surrounding rock stability control method adapted for coal mining area main roadway
US12221887B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2020 |
| Grant date | Feb 11, 2025 |
| Priority date | — |
| Expiry date | May 1, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D20/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present disclosure relates to a technical field of coal mining, in particular to a surrounding rock stability control method adapted for a coal mining area main roadway. The method comprises the following steps: reinforcing support on a roof and two sides of the mining area main roadway on a basis of an original support form; digging a safety roadway along a stop line of a present working face required by coal mine design, and supporting the safety roadway, wherein a protective coal pillar is formed between the safety roadway and the mining area main roadway; performing slitting blasting on the roof in the safety roadway, wherein blast holes are arranged on a roadway corner line on one side of the present working face to form a pre-splitting slit; and performing stoping at a next working face after completing coal mining at the present working face when stoping at the present working face advances to the safety roadway. By cutting the roof and relieving pressure at the stop mining line of the working face, an influence of mining disturbance on stability of the mining area main roadway in the stoping process of the working face is reduced, and by reinforcing support, a yielding …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.