宁东矿区巷道围岩稳定性分析与研究

Analysis and research on stability of roadway surrounding rock in Ningdong mining area

为了对宁东矿区复杂地质条件下的巷道围岩稳定性进行准确分类,结合该地区多个矿井回采巷道的实际情况,选取了巷道的顶板围岩强度、顶板围岩完整性、两帮围岩强度、直接顶厚度、巷道断面尺寸、采动影响、地下水和巷道埋深作为主要的稳定性影响因子。使用多因素单一指标法对各影响因子进行评价打分,并使用层次分析法确定各评价因子所占的权重,最后再使用加权平均法对巷道围岩稳定性结果进行分析。结果表明,使用多因素加权平均法对巷道围岩稳定性的分析结果更加符合宁东矿区的实际情况,对实现巷道差异性支护设计更易形成指导作用。

In order to accurately classify the stability of roadway surrounding rock under complex geological conditions in Ningdong mining area,the actual situation of multiple mining roadways in the region was combined and the strength of the roof surrounding rock,the integrity of the roof surrounding rock,the strength of the two sides of the surrounding rock,the thickness of the direct roof,the cross-sectional size of the roadway,the impact of mining,groundwater,and the depth of the roadways were selected as the main stability influencing factors.The multi factor single indicator method was used to evaluate and score each influencing factor,and the Analytic Hierarchy Process was used to determine the weight of each evaluation factor.Finally,the weighted average method was used to analyze the stability results of the surrounding rock of the roadway.The results indicate that using the multi factor weighted average method to analyze the stability of surrounding rock in roadways is more in line with the actual situation of Ningdong mining area,and it is easier to form a guiding role in achieving differential support of roadways.