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配制物理特性与原煤相似的型煤,结合自主研发的煤与瓦斯突出模拟系统,研究煤与瓦斯突出过程中的能量演化过程及突出主控因素。研究表明:突出实验存在临界压力(0.75 MPa),在瓦斯压力0.75~1.25 MPa,模拟地应力5~20 MPa的范围内,突出的煤体质量最大可达28.1%,最远达14.1 m。突出过程中,能量是不断衰减的,表现为高压腔体外端压力传感器率先感应,内侧明显滞后约0.1 s。正交实验表明,瓦斯压力是煤与瓦斯突出的主控因素,但地应力与水分含量同样发挥重要作用。水分由2%上升到7%的过程中,突出强度迅速降低,趋势呈非线性规律。
The briquette with similar physical properties to raw coal is prepared, and the self-developed coal and gas outburst simulation system is developed to study the energy evolution process and highlight the main controlling factors in the process of coal and gas outburst. The results show that the critical pressure (0.75 MPa) is prominent in the experiment, the maximum coal mass is up to 28.1% and the farthest reaches 14.1 m in the range of 0.75 ~ 1.25 MPa gas pressure and 5 ~ 20 MPa simulated ground stress. Prominent process, the energy is decaying, the performance of the first high-pressure chamber pressure sensor outside the first sensor, the inside significantly delayed about 0.1 s. Orthogonal experiments show that the gas pressure is the main controlling factor of coal and gas outburst, but the ground stress and the moisture content also play an important role. Water from 2% to 7% in the process, the rapid decline in the intensity, the trend was nonlinear.