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首页> 外文会议>International Symposium on Safety Science and Technology; 20061024-27; Changsha(CN) >Mechanism and Hazard Identification of the Delay Coal and Gas Outburst in Coal Driving
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Mechanism and Hazard Identification of the Delay Coal and Gas Outburst in Coal Driving

机译：采煤延误煤与瓦斯突出的机理及危害识别

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摘要

The delay coal and gas outburst happens after a period of blast or working. The stress in coal driving is simulated with RFPA~(2D). The three areas stresses in coal driving are arranged in full unload 2 m, partial unload 2-6 m and concentration load 6-18 m. The unload area is expanded with time due to strain softening in coal driving. Permeable force (gas pressure grads) has effect on delay outburst. The unload area shows strain softening and carrying capacity decreasing in coal driving. Coal in the wall falls by weight, when horizontal carrying capacity is lower than stress load that shifts in coal seam. The coal seam fractures post by the additive load as horizontal load is higher and the stress is critical. This is a feedback post. Thus, horizontal load results in fracture stress wave and delay coal and gas outburst.
机译：爆破或工作一段时间后，发生煤和瓦斯突出延迟。用RFPA〜（2D）模拟了煤驱过程中的应力。运煤过程中的三个应力区域分别为全卸载2 m，部分卸载2-6 m和集中载荷6-18 m。由于运煤过程中的应变软化，卸荷面积随时间而扩大。渗透力（气压等级）对延迟爆发有影响。卸煤区在驱煤中显示出应变软化和承载能力下降。当水平承载力低于煤层中移动的应力负荷时，壁中的煤炭会按重量下降。当水平荷载较高且应力为临界值时，煤层破裂受附加荷载的影响。这是一个反馈帖子。因此，水平载荷导致破裂应力波并延迟煤和瓦斯突出。

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