【摘要】 为了研究动压沿空巷道在煤柱宽度一定时,不同支护结构形式下围岩的变形破坏演化规律,利用新研制的地下工程综合模拟试验系统和先进的数字图像采集及相关分析技术,对动压沿空巷道在无支护、锚梁网索支护及支架支护3种不同支护形式下的围岩变形破坏与失稳全过程进行了研究.结果表明:实体煤巷在无支护情况下围岩表面位移大致分为加速变形、缓慢变形和二次加速变形三阶段;对于动压沿空巷道,在本工作面回采影响期间,巷道围岩变形远远大于掘进影响期间,锚杆加固范围内的煤体碎胀量主要发生在掘巷期间,而在回采影响期间,巷道周边位移主要是由深部煤体碎胀所引起;强烈采动影响阶段是动压沿空巷道围岩控制的难点,另外,锚梁网索支护较支架支护更适用于围岩变形量较大的动压沿空巷道.更多还原

【Abstract】 In order to study the deformation rules of god-side roadway subjected to dynamic pressure with different support forms under a certain coal-pillar width,the newly developed comprehensive simulation test bench for underground engineering and the digital photogrammetry and correlative analysis technology are used to study the whole process of deformation-failure of surrounding rock of god-side roadway subjected to dynamic pressure under different supporting forms such as non-supporting,roof bolting with bars,wire mesh supporting,and steel shed supporting.The results indicate that the surface displacement of the solid-coal roadway without supporting includes three stages,which are accelerated deformation,slow deformation,and secondary accelerated deformation;the deformation volume of the surrounding rock in the mining stage is much larger than the deformation value in the driving stage for the god-side roadway subjected to dynamic pressure,and the bulking of coal mainly takes place in the driving stage for the zone reinforced by roof bolting,the peripheral displacement of roadway is caused by the deformation of the deep coal in the mining stage;the intensity mining stage is difficult to support.Moreover,the roof bolting with bars and wire mesh supporting technology is more suitable than the steel shed supporting.更多还原