Extraction Force Prediction for Male Entrapment Victims with Different Body Types Submerged below the Grain Surface.

Area of Science:

• Agricultural Safety
• Occupational Health
• Biomechanical Engineering

Background:

• Confined space entrapment in grain is a significant cause of agricultural fatalities.
• Over 1,000 grain-related deaths have been recorded, with higher rates in states with large grain storage capacities.
• Existing research lacks a standardized method for estimating extraction forces for grain suffocation victims.

Purpose of the Study:

• To reintroduce and validate a prediction model for estimating extraction forces in grain entrapment scenarios.
• To analyze the sensitivity of input variables within the prediction model.
• To provide updated extraction force estimates for adult male victims based on varying body shapes and entrapment depths.

Main Methods:

• Developed a prediction model based on the principle of boundary shear, human surface area approximation, and lateral granular pressure equations.
• Performed sensitivity analyses on key input variables of the model.
• Updated anthropometric data for calculations and generated estimates for different adult male body shapes.

Main Results:

• The prediction model provides estimates for extraction forces required to rescue grain entrapment victims.
• Sensitivity analyses reveal the impact of different variables on force estimations.
• Graphical representations illustrate force estimates across common scenarios, entrapment depths, and body shapes.

Conclusions:

• The validated prediction model offers a crucial reference standard for estimating extraction forces in grain suffocation incidents.
• Updated data and analyses enhance the model's applicability for diverse victim profiles and conditions.
• Findings can inform agricultural safety protocols and rescue strategies to mitigate grain entrapment fatalities.