本文選題：安全工程 + 含水率��； 參考：《安全與環(huán)境學報》2017年04期

【摘要】：為了深入探討水分對煤中瓦斯解吸特性的影響,采用試驗和理論分析相結合的方法,按照原煤的固有粒度配比加工制作型煤,充分干燥后使其吸附平衡以模擬原始煤體,然后利用自制的試驗裝置實現水分自然進入含瓦斯煤,再測試水分潤濕含瓦斯煤過程中樣品缸內的瓦斯壓力變化情況。結果表明:水分潤濕含瓦斯煤過程中樣品缸內瓦斯壓力不斷升高,水分能置換出煤中吸附瓦斯;相同吸附平衡壓力下,煤樣含水率越高,水分占據的有效吸附位越多,累計瓦斯解吸量越大,當煤樣含水率達到煤的極限吸水率時,累計瓦斯解吸量達到極限值;同一含水率條件下,隨吸附平衡壓力增長,煤樣吸附飽和度逐漸增加,水分越難進入煤體內部細微孔隙,造成累計瓦斯解吸量逐漸增加,但增幅逐漸減小,隨吸附平衡壓力不斷升高,極限瓦斯解吸量趨于一定值。
[Abstract]:In order to explore the effect of water on the gas desorption characteristics of coal, the method of combining experimental and theoretical analysis is used to process the briquette in accordance with the inherent grain ratio of the raw coal. After fully drying it, the adsorption balance is made to simulate the original coal, and then the water naturally enters into the coal containing gas and then the moisture is tested by the self-made experimental device. The results show that the gas pressure changes in the sample cylinder in the process of gas coal containing gas. The results show that the gas pressure in the sample cylinder increases continuously during the wetting of the coal containing gas, and the water can replace the adsorbed gas in the coal. Under the same adsorption equilibrium pressure, the higher the water content of the coal sample, the more effective adsorption position of the water occupied, the more the accumulated gas desorption volume. When the coal sample water content reaches the limit water absorption of coal, the accumulated gas desorption capacity reaches the limit value; under the same water content condition, with the increase of adsorption equilibrium pressure, the adsorption saturation of coal samples increases gradually, the more difficult the moisture is to enter the fine pores in the coal body, resulting in the cumulative increase of the amount of gas solution absorption, but the increase gradually decreases with the adsorption equilibrium. With increasing pressure, the limit gas desorption volume tends to a certain value.

【作者單位】： 河南理工大學安全科學與工程學院;煤礦災害預防與搶險救災教育部工程研究中心;
【基金】：國家自然科學基金項目(51274090)
【分類號】：TD712
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本文編號：1869367