Research Article
Deflection Laws of Gas Drainage Boreholes in Interbedded Soft and Hard Seams: A Case Study at Xinzheng Coal Mine, China
Table 6
Overall ranking of synthetic weights of evaluation indicators.
| | Impact factor | Total sorts | Weight |
| | Hard and soft interbed | 1 | 0.406 | | Angle of bedding | 2 | 0.133 | | Device structure | 3 | 0.133 | | Anisotropy | 4 | 0.067 | | Rig-up | 5 | 0.066 | | Drilling tool weight | 6 | 0.066 | | Drilling rate choice | 7 | 0.052 | | Drilling method | 8 | 0.026 | | Drilling parameter | 9 | 0.026 | | WOB choice | 10 | 0.025 |
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