用于煤与瓦斯突出模拟的型煤胶结材料配比实验研究
Experimental Study on Cementing Materials Ratio of Briquette Coal Using in Coal and Gas Outburst Simulation
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摘要: 鉴于煤与瓦斯突出模拟实验所用的型煤一般与原煤性能差异较大，以硅酸盐水泥、腐殖酸钠、羟甲基纤维素钠和硅酸钠等材料为基料，分别研究各类胶结材料对煤的力学性质、坚固性系数、瓦斯吸附解吸特性的影响。并通过正交实验复配研发新型型煤胶结剂，用于突出模拟试验的型煤制作。实验结果表明：水泥能够迅速提高型煤的抗压强度和坚固性系数，也会极大减弱瓦斯吸附性能。腐殖酸钠含量的增加有利于煤吸附瓦斯，但对煤的坚固性与力学性能提升有限。当胶结剂比例为水泥：腐殖酸钠∶CMC∶活性炭= 2%∶（12%~15%）∶4%∶（4%~6%），型煤的抗压强度和瓦斯吸附特性与原煤的差异控制在10%以内。性质上与原煤较为接近，更适用于煤与瓦斯突出模拟试验。Abstract: In view of the quite difference between briquette coal used for the coal and gas outburst simulation and the raw coal, in this paper, we use Portland cement, sodium humic acid, CMC and sodium silicate as the basic materials to study the impact of various types of cements on the mechanical properties of coal, consistent coefficient, and gas adsorption analytical characteristics. We develop new type coal cementing agent by orthogonal compound for outburst simulation of coal production. Experimental results show that: cement can quickly improve briquette compressive strength and consistent coefficient, and greatly weaken the gas adsorption performance. The increased sodium humic acid content is in favor of the adsorption gas, but sturdiness and mechanical properties improvement of coal is limited. When the proportion of cement agent is Portland cement: sodium humic acid: CMC: sodium silicate= 2%∶(12%~15%)∶4%∶(4%~6%), the difference of compressive strength and gas adsorption analytical characteristics between the briquette coal and raw coal is controlled within 10%. Briquette coal is closer to raw coal and more applicable to coal and gas outburst simulation test.
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Keywords:
- coal and gas outburst /
- briquette ratio /
- cementing agent /
- basic parameter /
- simulation test
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