四方金矿深埋软岩巷道支护研究

矿山在进入深部开采后,由于地压问题引起巷道破坏，支护必不可少，但选择何种支护方式是困扰矿山企业的一个技术难题,亟待研究解决。以陕西四方金矿为例，通过对以往各种理论的总结分析，选取组合拱理论进行计算，应用有限元软件分析支护效果，探讨了不同支护方式下洞周应力、变形和塑性区的分布情况，并应用应力强度系数进行量化分析，研究了不支护、锚杆支护、锚杆与喷混凝土联合支护的效果。结果表明：采用有效的锚喷联合支护，可以改善围岩的应力状态，有效控制巷道的变形，不仅增加工人的安全感，而且提高工作效率，为矿山的安全生产、资源开采回收利用提供有力的保证。

Research on Support of Deep and Soft Rock Tunnel in Sifang Gold Mine

After mining in depth,due to the destruction of the tunnel caused by ground pressure,tunnel support is essen-tial,but how to choose the support pattern becomes a trouble for mining enterprises. A cose of Shannxi Sifang Gold Mine,based on the analysis of previous theoretical summary,the combined arch theory is selected to calculate and the finitude element soft-ware is utilized to analyze the tunnel effect,and discuss the distribution of principal stress,displacement and plastic zone. The quantitative analysis is made by the stress intensity coefficient to study the effect of non-support,only anchor bolt support and combined support of bolt and shotcrete. The support results showed that the effective combined support of bolt and shotcrete can improve the stress state of surrounding rocks and control the deformation of tunnel effectively,which can not only increase the sense of security of workers,but also improve work efficiency. Furthermore,it provides a strong guarantee for the mine safety production,the exploitation of resources.