摘要
为提高煤与瓦斯突出灾变过程仿真的准确性,采用时间步长法,描述突出时固相煤岩流在巷道网中运行堆积。按煤岩流"向下优先"规则、以巷道下向倾角正弦值为自变量,构造出煤量分配权重模型,该模型适应下向、近水平和上向3种巷道情况;按塌落模型构造突出煤强度变化。结合九里山矿突出事故案例,仿真煤岩流突入16031运输巷中,止步于2号反向风门前,同时煤岩流解吸出大量瓦斯,形成突出瓦斯源的一部分,在逆流风压的作用下,高浓度瓦斯透过2号风门,被瓦斯传感器监测到。研究表明,考虑煤岩流的仿真计算,能合理地描述煤流巷道瓦斯迅速升高问题。
In order to improve the simulation accuracy of the process in coal and gas outburst disaster period, time step method was put forward to describing the movement and accumulation of coal flow in roadway network when coal and gas outburst happened. Downward dip angles of tunnel were taken as the independent variables, model for distribution weight of coal output was built based on ＂Downward Priority＂ principle, and the model could adapt to downward roadway, nearly horizontal roadway and upward roadway. Strength change of outburst coal was established based on the collapse model. Combining with the coal and gas outburst accident and outburst monitoring facts in Jiulishan Coal Mine, process of coal flow movement was simulated, and the process was that coal flow swarmed into haulageway 16301, passing through reverse No. 2 ventilation door and much gas was desorbed and becoming part of the outburst gas source at the same time. Gas of high concentration was monitored by methane sensor when passing through No. 2 ventilation door under the influence of counter current wind pressure. The results show that the rapid rise of gas in roadway could be reasonably described, considering the simulation calculation of coal flow.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2017年第6期1344-1350,共7页
Journal of System Simulation
基金
国家自然科学基金(51174109
51304112)
关键词
突出煤岩流
优先权模型
系统仿真
时间步长法
巷道网
coal flow outburst
priority model
system simulation
time step method
roadway network
