A Fuzzy Decision-Making Strategy for Drilling Operating Parameters Considering Formation Hardness and Frictional Resistance in Underground Coal Mines

Le résumé fourni par la source

During drilling process, variations in formation hardness and frictional resistance often cause a mismatch between drilling operating parameters and actual conditions, reducing efficiency. A fuzzy decision-making strategy for drilling operating parameters is developed that enables feed speed and rotational speed to adapt to actual conditions. The formation hardness is accurately characterized using only drilling data through the integration of fuzzy C-means clustering method and defuzzification method. Meanwhile, the computational model for frictional resistance is established. They serve as inputs for subsequent decision-making models. The decision-making models for feed speed and rotational speed are developed based on the Mamdani fuzzy inference method, respectively. The effectiveness of the approach is demonstrated through an industrial case study based on actual drilling data.

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