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| Calculation model analysis of inflection point deviation under the condition of overlying rock without hard strata |
| Su Li |
| Sanyuan Shiku Mine Corporation Ltd., Shanxi Coal Transportation and Marketing Group, Changzhi 046000, China |
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Abstract The influencing factors of inflection point offset were analyzed, the influence mechanism and action trend of each influencing factor was explained. The mathematical model of multivariate statistical analysis was used to establish the calculation model of the upper boundary, lower boundary and strike boundary of the deflection tendency of inflection point. The resolvable coefficient and probability p value of the model were analyzed, and the accuracy of the calculation model was tested. It was concluded that the established calculation model was stable and reliable.
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