基于离散-连续耦合方法的底抽巷围岩破坏规律

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中图分类号：TD322 文献标志码：A 文章编号：1008-0562（2026）02-0129-08

Bottom pumping roadway based on discrete-continuous coupling method FANChaojun12，ZHANGJiaji1，LUOMingkun2，LANTianwei'，LISheng2，JIANGXiaofeng12，YANGLei2 （1.Ordos Research Institute，Liaoning Technical University， Ordos O17o04， China;2. College of Mining， Liaoning Technical University，Fuxin 1230，China;3.Ventilation Department ofEnergy Division，Shanxi Lu'an Environmental Protection Energv Development Companv Limited. Changzhi 046o02. China）

Abstract：To reveal the evolution patterns of surrounding rock failure in the bottm pumping roadway during coal seam mining，this study investigatesthe 290l working face bottom drainage tunnel ina coal mine.A continuousdiscrete coupled multiscale numerical simulation method was employed，supplemented by field borehole observations for validation.The results indicate that the number of rock particle force chains evolves through three distinct phases with mining advancement： initial stable stage，rapid decay stage，and dynamic stabilization stage.Fracture evolution folows a multi-scale“point-line-surface” patern，with failure predominantly concentrated on the leftrib and roof，exhibiting significant asymmetry.Basedon the results of borehole peeping， the roof is divided into three zones： fully developed joint zone，micro-joint initiation zone，and stable coal-rock interface zone.The research conclusions provide a theoretical basis for the stability analysis of roadway surrounding rock under similar conditions.

Keywords： bottom pumping roadway; coal seam mining; surrounding rock damage; force chain; cracks

0 引言

底抽巷在降低煤层瓦斯压力、改善矿井通风条件方面发挥着关键作用[1-4]，但是随着煤炭资源开采深度不断增加，深部高地应力及强采动影响下的底抽巷围岩稳定性问题日益突出[5]。（剩余10668字）