岩体结构类型对深井巷道围岩的稳定性影响研究

Study on Influence of Rock Mass Structure Type on Surrounding Rock Stability of Deep Mine Roadway

针对阳煤五矿后备区井底车场岩层厚度变化大、岩体结构多样的特点,从岩体结构分类出发,通过分析不同岩体结构特征下巷道的应力场特征和破坏区域分布特征,研究岩体块度尺寸对巷道的稳定性影响,并通过数学拟合的方法建立了岩体块度尺寸与巷道围岩破坏程度间的关系表达式。研究结果表明:在其他条件相同情况下,岩体块度越小,巷道稳定性越差;岩体结构尺寸是巷道围岩稳定性分级的一个重要指标;巷道围岩稳定性程度可以参考公式x>1/R0ln(a-y0)

To counter to the characteristics of large rock thickness change and a variety of rock mass structures around the pit bottom in the stand-by area in No. 5 Mine of Yangquan Coal Industry （ Group） Co. , Ltd. , in this paper, study was made on the influence of rock block size upon the roadway stability by starting from the classification of rock mass structures and analyzing the characteristics of the roadway stress field and the distribution characteristics of the failure area under different rock structure characteristics, and a relational expression between the rock block size and the surrounding rock failure degree was established by using the method of mathematical fitting. The study results showed that under other same conditions, the smaller the rock block size, the worse the roadway stability; the structural size of the rock mass was an important index for the classification of the roadway rock stability;and the roadway rock stability can be analyzed and determined by referring to the calculation result with formula x ＆gt; 1R0 ln a -y0A .