大采高工作面煤壁片帮影响因素研究与实践

Research and Practice on Influencing Factors of Coal Wall Rip Spalling at Large Mining Height Face

针对大采高工作面推进过程中容易出现的片帮及次生事故,首先对片帮的三种常见形貌进行了分析,随后利用FLAC软件建立了大采高工作面的数值计算模型,并对工作面前方超前压应力的分布规律进行了分析,在此基础上,分别研究了采高、煤岩强度和岩体裂隙对工作面煤壁片帮的影响机理和规律,为片帮的治理提供了重要理论依据。在煤矿大采高工作面回采作业中应用效果明显,为企业带来较大经济效益。

Aiming at rip spalling and secondary accidents easily occurred in the promote process at large mining height face,first three kinds of common topography are studied, then the numerical model of large mining height working face is established by FLAC software and finally the distribution law compressive stress ahead of the working face is analyzed in the paper,which has provided important theoretical basis for the treatment of rip spalling and brought greater economic benefits for enterprises.