Physical Simulation on Deformation Rules of God-Side Roadway Subjected to Dynamic Pressure
Physical Simulation on Deformation Rules of God-Side Roadway Subjected to Dynamic Pressure
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发表时间：
2010
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通讯作者：
W. Meng
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作者：
W. Meng
为了研究在一定煤柱宽度下不同支护形式的沿空巷道在动压作用下的变形规律，利用新研制的地下工程综合模拟试验台和数字摄影测量及相关分析技术，研究了无支护、锚杆顶板锚杆支护、锚网支护、钢棚支护等不同支护形式的沿空巷道围岩在动压作用下的变形破坏全过程。结果表明，无支护的坚硬煤巷地表变形分为加速变形、缓慢变形和次级加速变形三个阶段；受动压作用的沿空巷道，开采阶段围岩变形量远大于掘进阶段的变形值，顶板锚杆加固带的煤体膨胀主要发生在掘进阶段，巷道周边位移是由于开采阶段深部煤体变形引起的，强度开采阶段较难支护，且顶板锚杆锚网支护技术比钢棚支护技术更适合。
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.