The existence of coal mine water has an important influence on the instability of soft rock roadway in mining engineering. Considering the effect of mine water, a case study on the fracture mechanism and control technology of soft rock roadway was performed in this paper. The results showed that with the increase of moisture content, the uniaxial compressive strength of mudstone nonlinearly decreased, while the tensile strength, Young’s modulus, cohesion, and friction angle tended to a linear decrease approximately. Meanwhile, with the increase of the weakening coefficient, the axial force of the anchorage body increased gradually, while the maximum shear stress decreased gradually. With the increase of moisture content, the failure zone was further propagated into the deep surrounding rock, resulting in a larger stress relaxation around the roadway, especially in the roof and floor. Finally, the supporting technology of the roadway was proposed, and then its support principle, design process, and parameters were also analyzed in detail. The field monitoring data showed that the support technology can control the surrounding rock deformation effectively and maintain the long-term stability of the roadway.

中文翻译：

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考虑矿井水的软岩巷道变形机理建模与仿真

煤矿井水的存在对采矿工程中软岩巷道的失稳有重要影响。考虑到矿井水的影响，本文以软岩巷道破裂机理及控制技术为例进行了研究。结果表明，随着含水率的增加，泥岩的单轴抗压强度呈非线性降低，而抗拉强度、杨氏模量、内聚力和摩擦角均近似线性降低。同时，随着弱化系数的增大，锚固体的轴向力逐渐增大，而最大剪应力逐渐减小。随着含水率的增加，破坏带进一步扩展到深部围岩中，导致巷道周围出现较大的应力松弛，尤其是屋顶和地板。最后提出了巷道支护技术，并对其支护原理、设计过程和参数进行了详细分析。现场监测数据表明，该支护技术能够有效控制围岩变形，保持巷道长期稳定。