为研究瓦斯压力对煤体爆破应力的影响规律，开展了不同瓦斯压力条件下煤体爆破试验，对煤体爆破应力进行测试与分析，并利用LS-DYNA3D模拟软件对试验结果进行了验证。结果表明：煤体中瓦斯压力的能够增加煤体爆破应力波峰值，应力波的作用时间延长大约200 us；随着瓦斯压力增加，煤体爆破应力波峰值也随之增大，从而更利于煤体爆破裂纹的扩展；煤体中瓦斯压力对煤体爆破中远区影响较大，在爆破近区，瓦斯压力基本可以忽略；当瓦斯压力存在时，煤体爆炸应力波均将出现两个完整的波形。%In order to study the stress of coal blasting with the effect of gas pressure , the coal blasting experiments under the conditions of different gas pressures were conducted , and the coal blasting stress were measured and ana-lyzed.The LS-DYNA3D simulation software was applied to validate the experiment results .It showed that the exist-ence of gas pressure increases the peak of coal blasting stress wave , and the prolonged action duration of the stress wave is about 200us.The greater the gas pressure , the greater peak of coal blasting stress wave , which is more conducive to the expansion of coal blasting crack .In the moderate or far region , the effect of gas pressure will be enhanced and increase the peak of coal blasting stress wave in varying degrees .In blasting near region , the effect of gas pressure can be largely ignored .With the existence of gas pressure , the coal blasting stress wave will appear 2 whole wave forms .
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