Abstract：Prediction of the stope weighting intensity is an important part of mine pressure disaster prevention and control and a main basis of strata control. A strata strength index was defined and a new method for classification forecasting of strata behaviors of thick coal seams with hard roofs was put forward. According to the mining practice in Datong mining area，a classification and prediction index system of strata behaviors of thick seams with hard roofs was established by taking the instability condition of far-field high-level structure as the core and taking into account the basic indexes and strengthening conditions that affect the strata behaviors. Based on the fuzzy mathematics theory，a classification forecasting model of the strata behaviors was established，and four different levels of quantitative indexes for different factors were given. The proposed method was applied to predict the weighting strength of 8105 working face of the extra-thick coal seam with a hard roof in Tongxin coal mine. It is shown that the predicted result is in good agreement with the mining practice and that the method can accurately predict strata behaviors in hard roof thick coal seams. The index system of the classification and prediction method of the weighting strength index is universal，comprehensive and systematic，and the classification of index parameters is detailed and operable. The proposed method can provide theoretical reference for the prediction of the stope weighting intensity and the management of roofs of thick seams with hard roofs in other mining areas.
霍丙杰1，荆雪冬1，于 斌2，韩 军1. 坚硬顶板厚煤层采场来压强度分级预测方法研究[J]. 岩石力学与工程学报, 2019, 38(9): 1828-1835.
HUO Bingjie1，JING Xuedong1，YU Bin2，HAN Jun1. A classification forecasting method for the weighting intensity of stopes of thick coal seams with hard roofs. , 2019, 38(9): 1828-1835.
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2019, Vol. 38 
