基于瓦斯放散特性单因素的煤与瓦斯突出模拟实验研究
Coal and Gas Outburst Simulation Experiment Based on Single Factor of Gas Emission Characteristics
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摘要: 使用三维煤与瓦斯突出模拟装置进行不同瓦斯放散特性煤样的煤与瓦斯突出模拟实验，分析单因素条件下煤样瓦斯放散特性对煤与瓦斯突出的影响。模拟实验进一步验证了煤体吸附瓦斯会在一定程度上降低煤体强度。实验结果表明，煤样瓦斯放散初速度与突出发生后残留煤体的坚固性系数呈负相关，瓦斯对煤样的粉碎作用会随瓦斯放散初速度增大而增强。提出突出强度系数综合表示突出发生的强度，数据显示：突出强度与煤样瓦斯放散初速度呈正相关，对于具有煤与瓦斯突出危险的煤层存在1个突出强度会急剧增加的阈值，当煤层的瓦斯放散初速度高于该数值时突出强度将明显增强。对于五轮山煤矿的5-3号煤层，该值介于13.9～16.8之间。Abstract: In order to analyze the effect of emission characteristics on the coal and gas outburst under single factor condition, the coal and gas outburst simulation with different gas emission characteristics was carried out by using three dimensional gas outburst simulation device. The simulation experiment further verifies that the gas adsorbed by coal body will reduce the strength of the coal body. The experimental results show that the gas emission rate is negatively correlated with the strength coefficient of residual coal body after outburst. The comminution of gas acting on coal sample will increase with the increase of the gas emission rate. In order to indicate the strength of gas outburst, outburst strength coefficient was proposed. There should be a positive correlation between the outburst strength and the gas emission rate. In other words, with the increase of the the gas emission rate, the outburst strength will become greater. There is a threshold for the coal with gas outburst dangerous. When the gas emission rate is above that value, the outburst strength will be obviously enhanced. For the No.5-3 seam of Wulunshan Coal Mine, the value is between 13.9 and 16.8.
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[1] 王显政．煤矿安全新技术[M]．北京：煤炭工业出版社，2002：1-3. [2] 胡千庭，周世宁，周心权．煤与瓦斯突出过程的力学作用机理[J]．煤炭学报，2008，33（12）：68-72. [3] 于不凡．煤矿瓦斯灾害防治及利用技术手册[M]．修订版.北京：煤炭工业出版社，2005:509-510. [4] 赵志刚，谭云亮．煤与瓦斯突出的耦合灾变机理研究[M]．北京：煤炭工业出版社，2005:509-510. [5] 陆漆．不同载荷水平下煤与瓦斯突出模拟实验研究[D]．重庆：重庆大学，2016:2-5. [6] 王维忠，陶云奇，许江，等．不同瓦斯压力条件下的煤与瓦斯突出模拟实验[J]．重庆大学学报，2010，33（3）：82-86. [7] 徐永．含水率影响成型煤样力学性质实验研究[D]．三河：华北科技学院，2016:2-5. [8] 周世宁，林柏泉．煤层瓦斯赋存与流动理论[M]．北京：煤炭工业出版社，1999:25-31. [9] 邓金封，栾永祥，王佑安．煤与瓦斯突出模拟试验研究[J]．煤矿安全，1989，20（11）：5-10. [10] 蔡成功．煤与瓦斯突出三维模拟实验研究[J]．煤炭学报，2004，29（1）：66-69.
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