综放沿空巷道窄煤柱稳定性分析及围岩控制技术研究

Stability Analysis of Narrow Coal Pillars in Gob-side Roadway of Fully Mechanized Caving and Research on Surrounding Rock Control Technology

为对18501工作面沿空巷道保护煤柱的稳定性和顺槽的支护合理性进行分析,通过Fl AC3D软件建立18501综采工作面沿空掘巷模型研究窄煤柱内应力特征及位移分布规律,得到该工作面沿空掘巷煤柱合理的宽度为10m,并提出了顶板锚索、巷帮锚杆的巷道补强支护措施及添加树脂锚固剂的巷道补强支护措施和实体煤侧巷帮扩刷等围岩控制措施后,沿空巷道两帮及顶板的变形量较之前分别减少了24%和61%,巷道表面位移量控制在允许范围内,能够保证10m窄煤柱护巷条件下巷道在回采期间正常安全的使用。

In order to analyze the stability of the coal pillars along the 18501 working face and the rationality of the support of the channel,the Flac3D software is used to establish the 18501 fully mechanized mining face along the goaf model to study the internal stress characteristics and displacement distribution of narrow coal pillars.The reasonable width of the coal pillar along the empty roadway is 10m,and the roadway reinforcement support measures with roofing anchor cable and roadway anchoring rod are added,and the roadway reinforcement support measures and entities with resin anchoring agent are added.After the coal side lanes are used to expand the brush and other surrounding rock control measures,the deformation of the two gangs and the roof of the roadway along the roadway is reduced by 24%and 61%respectively.The displacement of the roadway surface is controlled within the allowable range,and the 10m narrow coal pillar can be guaranteed.Under normal conditions,the roadway is normally and safely used during mining.