工作面开采煤壁超前支承应力演化规律分析与计算  

Analysis and Calculation of Evolution Law of Advance Support Stress on Coal Wall in Front of the Working Face

作　　者：崔立军 王国瑞 CUI Lijun;WANG Guomi(Inner Mongolia Coal Science Research Institute Co.,Ltd.,Hohhot 010010,China)

机构地区：[1]内蒙古煤炭科学研究院有限责任公司,内蒙古呼和浩特010010

出　　处：《煤矿安全》2018年第6期225-228,共4页Safety in Coal Mines

摘　　要：基于极限平衡理论和煤体的极限承载能力,推导出了工作面煤壁超前支承应力影响范围的表达式。以此为出发点,分别对工作面开采阶段覆岩层中关键层破断前后煤壁超前支承应力演化规律进行了分析与计算。通过理论计算分析和实际工程验证结果表明,上覆岩层中关键层破断后,其工作面煤壁超前支承应力的峰值大小和影响范围较关键层破断前小。In this paper, based on the limit equilibrium theory and the ultimate bearing capacity of coal, the expression of the influence range of the advance support stress of the coal face is derived. As a starting point, the evolution of the overbearing stress evolution of the coal wall before and after the breakage of the key strata in the overlying strata of the working face mining stage is analyzed and calculated respectively. Theoretical calculation analysis results and the actual engineering verification indicate that the peak value and the influence range of the coal wall in front of the coal wall are smaller than that of the key layer after the breakage of key strata in the overburden strata.

关 键 词：超前支承应力 关键层破断 集中系数 影响范围 矿山压力 

分 类 号：TD323[矿业工程—矿井建设]