型煤力学性质的影响因素实验研究
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摘要
为了确定型煤最佳配比参数,为煤相似模拟材料实验提供一定的理论指导与借鉴,论文通过单轴压缩实验,探究不同煤粉粒径比例、腐植酸钠胶结剂掺入量、成型压力和保压时间4种因素相互作用下对型煤力学参数作用规律。依据抗压强度、弹性模量和泊松比3个力学参数变化情况,确定了各因素对型煤力学参数的影响规律。实验结果表明:在各因素相互作用下,一定范围内,型煤的抗压强度受成型压力与粒径比例的影响较大,弹性模量受腐成型压力的影响较为明显,泊松比受粒径比例、腐植酸钠掺入量和成型压力的共同影响。
In order to determine the best briquette proportion parameters and provide some theoretical guidance and reference for the similar simulated coal material experiment, this paper explored the interaction rules of mechanical parameters of briquette under the interaction of four factors, namely, different coal particle size proportion, sodium humate cement incorporation amount, molding pressure and holding time, through the uniaxial compression experiment. According to the changes of compressive strength, elastic modulus and Poisson's ratio, the influence of various factors on the mechanical parameters of briquette was determined. The experimental results show that under the interaction of various factors and in a certain range, the compressive strength of briquette is mostly affected by the forming pressure and particle size ratio. The main effect factor of elastic modulus is the forming pressure. Obviously, the Poisson's ratio is mostly affected by the ratio of particle size, sodium humate incorporation and molding pressure.
In order to determine the best briquette proportion parameters and provide some theoretical guidance and reference for the similar simulated coal material experiment, this paper explored the interaction rules of mechanical parameters of briquette under the interaction of four factors, namely, different coal particle size proportion, sodium humate cement incorporation amount, molding pressure and holding time, through the uniaxial compression experiment. According to the changes of compressive strength, elastic modulus and Poisson's ratio, the influence of various factors on the mechanical parameters of briquette was determined. The experimental results show that under the interaction of various factors and in a certain range, the compressive strength of briquette is mostly affected by the forming pressure and particle size ratio. The main effect factor of elastic modulus is the forming pressure. Obviously, the Poisson's ratio is mostly affected by the ratio of particle size, sodium humate incorporation and molding pressure.
引文
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[2]苏承东,翟新献,李永明,等.煤样三轴压缩下变形和强度分析[J].岩石力学与工程学报,2006,25(s1):2963-2968.
[3]许江,李波波,周婷,等.加卸载条件下煤岩变形特性与渗透特征的试验研究[J].煤炭学报,2012,37(9):1493-1498.
[4]张建国,魏风清.含瓦斯煤的突出模拟实验[J].矿业安全与环保,2002,29(1):7-9,12.
[5]王汉鹏,张庆贺,袁亮,等.含瓦斯煤相似材料研制及其突出试验应用[J].岩土力学,2015,36(6):1676-1682.
[6]姚宇平,周世宁.含瓦斯煤的力学性质[J].中国矿业大学学报,1988(1):4-10.
[7]许江,鲜学福,杜云贵,等.含瓦斯煤的力学特性的实验分析[J].重庆大学学报,1993,16(5):42-47.
[8]许江,张丹丹,彭守建,等.温度对含瓦斯煤力学性质影响的试验研究[J].岩石力学与工程学报,2011,30(s1):2730-2735.
[9]孙朋.突出煤相似材料配比模型实验研究[D].重庆:重庆研究院,2016.
[10]吉登高,王祖讷,张丽娟,等.粉煤成型原料粒度组成的试验研究[J].煤炭学报,2005,30(1):100-103.
[11]杨凤玲.型煤成型影响因素的实验研究[J].煤化工,2009,143(4):37-40.
[12]张金山,郭振坤,杨静,等.型煤成型影响因素的正交实验分析[J].煤炭技术,2016,35(9):287-288.
[13]许江,叶桂兵,李波波,等.不同黏结剂配比条件下型煤力学及渗透特性试验研究[J].岩土力学,2015,36(1):104-110.
[14]徐永.含水率影响成型煤样力学性质实验研究[D].河北三河燕郊:华北科技学院,2016.
[15]袁梅,许江,李波波,等.粒径对含瓦斯型煤力学性质及渗透特性的影响试验研究[J].煤矿安全,2016,47(9):24-27.
[16]郭怀广,仇海生.水分对阳泉3#煤力学性质影响研究[J].煤矿安全,2013,44(2):12-15.
[17]谌伦建,阳虹,赵跃民,等.原料煤级配对型煤强度的影响[J].矿业安全与环保,2001,28(1):6-7,16.