地下软岩工程可靠度研究

Research on reliability of underground soft rock engineering

软岩工程是岩体力学研究领域的难点问题之一。影响地下软岩工程围岩稳定性因素比一般的岩体工程存在更大的随机性和不确定性 ,因此 ,在地下软岩工程围岩稳定性分析方法中开展可靠度方法的研究是非常必要的。本文分析了软岩工程围岩的物理和力学参数的随机性。根据煤矿地下软岩巷道特点 ,建立了在近水平层状力学介质中和似连续力学介质中这两类主要软岩巷道围岩在锚喷支护下的可靠度分析方程。工程实例分析验证本文的研究结论是可信的 ,展示了其广阔的应用前景。

Soft rock engineering is a difficult problem of rock mechanics.There are much more randomness and uncertainty in soft rock than in general rock.Therefore,it is necessary to develop reliability approach in stability analysis of surrounding rock for underground soft rock engineering.Randomness of physical and mechanical parameters of soft rock was analyzed in this paper.According to the feature of underground soft rock roadway of coal mine,reliability analysis equations for two types of surrounding rock,which are approximately horizontal medium and quasi continuous medium,were established under the condition of surrounding rock supported by bolt mesh arch. The case study proved that result obtained in this paper is accurate with bright future of application.