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依据含瓦斯煤力学试验,综合分析含瓦斯煤破坏变形特征与工作面煤体受力环境,采用模糊综合分析法,确定工作面煤体扩容重要因素及其权重;基于二元离散理论,构建工作面煤体扩容预测判别模型。研究表明,采动应力、含瓦斯煤的抗压强度、原岩应力是工作面煤体扩容关键影响因素,而采动应力是其主控因素,降低采动应力是控制深部煤体扩容的最有效途径。创建了以采动应力为主控因素,二元离散判据的工作面煤体扩容预测新方法,达到了工作面煤体扩容有效预测与防控的目的。
Based on the gas-containing coal mechanics test, a comprehensive analysis is made of the deformation characteristics of the coal-bearing coal and the stress environment of the coalface in the working face. The fuzzy comprehensive analysis method is used to determine the important factors and weight of the coal face’s expansion. Based on the binary discrete theory, Prediction model of coal face expansion. The study shows that mining stress, compressive strength of coal-bearing coal and original rock stress are the key factors affecting the expansion of coal face, and mining stress is the main controlling factor. Reducing mining stress is the most important factor for controlling deep coal expansion Effective Ways. A new method of coal mass expansion forecasting based on mining stress as the main control factor and binary discretization criterion was established and the purpose of effective prediction and prevention and control of coal expansion was achieved.