深井稳定基岩段合理井壁厚度确定探讨  

Discussion on the suitable sidewall thickness of deep shaft in steady surrounding rock

作　　者：孙扬[1] 安建英[1] 牟林 高廷廷[3] 

机构地区：[1]中国恩菲工程技术有限公司,北京100038 [2]中煤科工集团西安研究院,陕西西安710065 [3]北京住总集团有限责任公司,北京100020

出　　处：《中国矿山工程》2015年第4期74-77,共4页China Mine Engineering

摘　　要：在深井矿山设计中,仍采用传统侧压力系数法确定井壁荷载,使得计算得到井壁厚度随深度成幂函数关系增加,且计算中不考虑水平应力水平,这显然存在局限性。分析表明:一定条件下,随井壁厚度的增加,其内缘应力成负指数关系衰减。并壁厚度的增加与井壁安全储备并非线性增加,且深部围岩自身强度较高,应充分利用围岩自身强度。选用合理井壁支护厚度,满足矿井安全生产需要,节省矿井前期建设投资。本文依托某超深井矿山工程地质背景,应用侧压力系数法、弹性平面法及塑形数值法,计算探讨了如何合理确定超深井基岩段井壁的厚度。Traditional lateral pressure coefficient method is still used to determine the sidewall load in deep mine design, but it makes the shaft wall thickness increase with the increase of mine depth by power function. In the calculation it doesn＇t consider horizontal in-situ stress, so it shows some limitation. Analysis shows that internal stress of shaft wall attenuate with the increase of wall thickness by negative exponent function under some conditions. Security reserve with increasing wall thickness isn＇t liner law. For higher surrounding rock strength in deep strata, surrounding rock self-support strength should be sufficiently used, and suitable shaft wall thickness he selected to ensure safety production and save investment. In this paper it was calculated and analyzed that how to select suitable wall thickness in deep mine by using lateral pressure coefficient method, elastic plane method and plastic numerical method on the basis of one actual deep mine＇s geology background.

关 键 词：超深井 稳定基岩 井壁侧压力 井壁厚度 

分 类 号：TD350.1[矿业工程—矿井建设]