Shaanxi Zhengtong Coal Industry Co. , Ltd.
College of Energy Engineering, Xi’an University of Science and Technology
Institute of Rock and Soil Mechanics, Chinese Academy of Sciences

为了研究深部高应力巷道围岩变形和破坏特征,通过理论分析、数值模拟和现场试验相结合的方法,对不同侧压系数与不同岩性下巷道围岩的塑性区分布规律进行探究,结果表明:随着侧压系数的增大,巷道围岩塑性区范围逐渐增大,且两帮的变化速率明显较小,使得塑性区由圆形变为椭圆形,当侧压系数为1.8时,顶底板处塑性区最大;不同岩性下的巷道塑性变形区均表现为顶底板范围大,两帮范围小的特点,且泥岩中的塑性区范围要明显小于煤层;通过数值模拟对比注浆加固前后巷道位移量,结果表明注浆加固后围岩顶板与两帮位移量平均减少了28%,现场实际应用“锚固+注浆”联合支护后,掘进期间巷道断面基本无变形。

In order to study the surrounding rock deformation and failure characteristics of deep high stress roadway, through theoretical analysis, numerical simulation and field test, the distribution law of plastic zone of the roadway surrounding rock under different lateral pressure coefficients and different lithology is explored. The results show that with the increase of lateral pressure coefficient, the plastic zone of roadway surrounding rock gradually increases, and the two sides changes slowly, which makes the plastic zone change from circular to elliptical. When the lateral pressure coefficient is 1. 8, the plastic zone at the roof and floor is the largest. Though under different lithology area in the roadway, all the plastic deformation range is large on the roof and floor, while small on the two sides, and the plastic zone in mudstone is obviously smaller than that in coal seam. According to numerical simulation, the displacement of roadway before and after grouting reinforcement is compared. The results show that the displacement of the surrounding rock roof and two sides is reduced by 28% on average after grouting reinforcement. And with the combined support of bolting and grouting is applied in the field, there is little deformation of roadway section during excavation.

国家自然科学基金项目(52074209);陕西省自然科学基础研究计划联合基金项目(2021JLM-06)

朱友恒, 丁自伟, 刘 江, 等. 深部高应力软岩巷道围岩变形机理及控制技术研究 [J]. 煤炭工程, 2023, 55(10): 98-104.