岩体结构类型与巷道围岩稳定程度的相关性研究

Study on Correlation Between Rock Structure Type and Stability of Surrounding Rock Along 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,通过分析巷道的应力场特征和破坏区域分布特征研究不同岩体结构特征下巷道的稳定性。研究结果表明:同等条件下巷道稳定程度为整体结构>层状结构>块体结构>碎裂结构>散体结构;岩体结构尺寸是巷道围岩稳定性分级的一个重要指标;巷道围岩稳定性与岩体块度尺寸间的数学关系为y=y0+A·eRo·x。其研究成果对于巷道围岩分级以及巷道支护具有理论指导意义。

According to the high varied thickness of the rock strata and the multi rock structure features at the mine shaft bottom of the mine reserve area in No. 5 Mine of Yangquan Coal Industry Group, from the classification of the rock structures, with the analysis on the stress filed features of the mine roadway and the distribution features of the failure zone, the paper had a study on the stability of the mine roadway under the different rock structure features. The study results showed that under the equivalent conditions, the stabilized degree of the mine roadway was a integrated structure 〉 layered structure 〉 block structure 〉 breaking structure 〉 granular structure. The size of the rock structure would be an important index of the stability classification for the stability of the mine roadway surrounding rock. There a mathematics relationship between the surrounding rock stability of the mine roadway and the rock block size. The study results would have theoretical guidance signifieances to the surrounding rock classification of the mine roadway and the mine roadway support.