活鸡兔井田延安组煤岩力学性质及综采可行性分析

Coal and Rock Mechanical Properties of Yan'an Formation and Feasibility Analysis of Fully Mechanized Mining in Huojitu Mine Field

根据煤样力学测试和分析成果,对延安组煤岩顶底板的稳定性和综采可行性进行评价。研究结果表明,延安组煤岩抗压强度、普氏系数等参数随埋深有增加趋势,煤层顶底板岩石力学强度以软弱-半坚硬为主,不坚固-中等坚固为主,属易软化岩类,抗剪断强度偏低,完整性与稳定性较差;主采煤层顶底板普氏系数大多<6,可采性较好,适合开展大规模机械化开采。

According to the mechanical test and analysis results of coal samples,the stability of the roof and floor of Yan'an Formation coal and rock and the feasibility of fully mechanized mining are evaluated.The research results show that the compressive strength of Yan'an Formation coal and rock,Proctor's coefficient and other parameters have an increasing trend with the burial depth.The mechanical strength of coal seam roof and floor rock is mainly weak-semi-hard,and weak-moderately strong.It belongs to soft rock,with low shear strength and poor integrity and stability;Most of the Proctor coefficients of the roof and floor of the main mining coal seam are less than 6,and the minability is good,which is suitable for large-scale mechanized mining.