深部巷道围岩扰动敏感区划分机制研究

doi:10.3724/1000-6915.jrme.2026.0066

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摘要针对不同围压与扰动条件下深部巷道围岩扰动敏感区难以统一判识的问题，以红砂岩为对象，依托RRTS-IV流变扰动试验系统开展三轴流变扰动试验，并结合核磁共振(NMR)测试，从强度衰减、扰动应变演化及孔隙结构变化3个方面提出基于修正破坏接近度F*的扰动敏感区划分方法。F*将围压提升效应与扰动累积导致的强度衰减统一纳入表征，使不同工况下的破坏临近程度可在同一无量纲尺度下对比。试验结果表明：（1）扰动应变随F*增长呈现“减小–缓增–突变”的三阶段规律，可对应划分为扰动非敏感区（F*＜0.70）、扰动敏感区（0.70≤F*＜0.80）与扰动敏感破坏区（F*≥0.80）；（2）扰动后破坏应力随扰动次数呈指数衰减，拟合得到的扰动敏感系数β随围压增大而减小，表明围压对扰动损伤具有抑制作用；（3）不同围压和扰动次数条件下的扰动应变最小点与突变点在F*空间内位置稳定，均集中在F*≈0.70和F*≈0.80附近；（4）孔隙率变化与核磁共振图像显示，F*＜0.70时孔隙结构以微细孔隙为主；0.70≤F*＜0.80时中等尺度孔隙逐渐发育；F*≥0.80时较大孔隙及连通裂隙快速发展，孔隙率出现跃迁；该微观结构演化规律与扰动应变的三阶段演化特征相一致。所提出的基于F*的扰动敏感区划分方法实现了围压效应、扰动累积效应与破坏临近程度的统一表征，可为深部巷道围岩扰动风险评估与分区支护参数匹配提供判识依据。

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	王波1*
	于克祥1
	季渤1
	高翔宇1
	孙宏旭1
	王汉鹏2
	王军3
	黄万朋4

关键词 ：采矿工程, 深部巷道围岩, 流变扰动, 扰动敏感区, 修正破坏接近度, 扰动应变

Abstract：To consistently identify disturbance-sensitive zones in the surrounding rock of deep roadways under varying confining pressures and disturbance conditions, triaxial rheological disturbance tests were conducted on red sandstone specimens using the RRTS-IV system, complemented by nuclear magnetic resonance (NMR) measurements. A method for delineating disturbance-sensitive zones based on a modified failure proximity index F* was proposed by jointly considering strength attenuation, disturbance strain evolution, and pore-structure changes. The index F* incorporates both the confinement-induced strengthening effect and the disturbance-induced strength attenuation within a unified framework, thereby enabling the proximity to failure under different conditions to be compared on a common dimensionless scale. The results show that: (1) As F* increases, the disturbance strain undergoes a three-stage evolution characterized by an initial decrease, a gradual increase, and a subsequent abrupt increase. These stages correspond to the disturbance-insensitive zone (F*＜0.70), disturbance-sensitive zone (0.70 ≤ F*＜0.80), and disturbance-sensitive failure zone (F*≥0.80), respectively. (2) The post-disturbance failure stress decreases exponentially with the number of disturbances. The fitted disturbance-sensitivity coefficient ? decreases with increasing confining pressure, indicating that confining pressure suppresses disturbance-induced damage. (3) Under different confining pressures and disturbance levels, the minimum and abrupt-change points of the disturbance strain remain stable in F* space and are concentrated near F* ≈ 0.70 and F* ≈ 0.80, respectively. (4) Porosity measurements and NMR images show that fine pores dominate when F*＜0.70; medium-sized pores gradually develop when 0.70≤F*＜0.80; and relatively large pores and interconnected fractures develop rapidly when F*≥0.80, accompanied by an abrupt increase in porosity. This microstructural evolution is consistent with the three-stage evolution of the disturbance strain. The proposed F*-based method integrates the effects of confining pressure, disturbance accumulation, and proximity to failure into a unified dimensionless measure, providing a basis for disturbance-risk assessment and the selection of zone-specific support parameters in deep roadways.

Key words： mining engineering surrounding rock of deep roadways rheological disturbance disturbance-sensitive zone modified failure proximity index disturbance strain

引用本文:

王波1*，于克祥1，季渤1，高翔宇1，孙宏旭1，王汉鹏2，王军3，黄万朋4. 深部巷道围岩扰动敏感区划分机制研究[J]. 岩石力学与工程学报, 2026, 45(11): 3236-3253.
WANG Bo1*, YU Kexiang1, JI Bo1, GAO Xiangyu1, SUN Hongxu1, WANG Hanpeng2, WANG Jun3, HUANG Wanpeng4. Mechanism of disturbance-sensitive zone delineation in deep roadway surrounding rock. , 2026, 45(11): 3236-3253.

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https://rockmech.whrsm.ac.cn/CN/10.3724/1000-6915.jrme.2026.0066 或 https://rockmech.whrsm.ac.cn/CN/Y2026/V45/I11/3236

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