基于沉积分析的围岩稳定性区域预测技术

Regional Prediction Technology of Surrounding Rock Stability Based on Sedimentary Analysis

为了对围岩稳定性区域预测提供沉积成因分析,从沉积环境识别划分和沉积岩沉积学特征入手,利用沉积学理论,从成因角度揭示了围岩稳定性与沉积环境的关系。通过对反映主要岩相分布特征及古地理的成因和展布的砂岩与泥岩含量百分比进行标准化处理,将比值划分为5个区间,并以万利矿区为例,进行了沉积环境和围岩稳定性的分析和计算,绘制出围岩区域稳定性对比图,计算出各区域的稳定性影响系数,Ⅰ级取1.00、Ⅱ级取0.81、Ⅲ级取0.74、Ⅳ级取0.61、Ⅴ级取0.58。从而提出了一套基于沉积分析的围岩稳定性区域预测方案。

In order to provide the analysis on the sedimentary formation causes to the regional prediction of surrounding rock stability region,from the identification and division of the sedimentary environment and the sediment features of the sedimentary rock,the sediment theory was applied to reveal the relationship between the surrounding rock stability and the sedimentary environment from the formation causes.With the standardization treatment conducted on the percentages of the sandstone and mudstone contents which could reflect the main lithofacies distribution and features and the formation cause and layout of the paleogeography,the ratio value could be divided into five sections.Taking Wanli Mining Area as an example,the analysis and calculation was conducted on the sedimentary environment and the surrounding rock stability,the comparison figures on the stability of the surrounding rock area were drawn and the stability influence coefficient of each area was calculated.The grade I would be 1.00,grade II would be 0.81,grade III would be 0.74,grade IV would be 0.61 and grade V would be 0.58.Therefore,a set of the regional prediction plan of the surrounding rock stability was provided based on the sedimentary analysis.