【摘要】：對含瓦斯煤滲透率影響因素進行分析,得到了基于溫度、瓦斯壓力、瓦斯吸附膨脹的有效應(yīng)力計算公式.從滲透率影響因素之間的相互作用出發(fā),通過克拉伯龍方程給出了溫度增量引起瓦斯壓力變化,瓦斯壓力導(dǎo)致煤基質(zhì)壓縮及吸附膨脹應(yīng)力改變,由此改進了有效應(yīng)力計算公式.以Kozeny-Carman方程為橋梁,修正了煤體峰值前,壓縮條件下考慮溫度、瓦斯壓力及吸附膨脹相互作用影響的滲透率動態(tài)演化模型.利用自制實驗系統(tǒng)對溫度作用下含瓦斯煤滲透性進行測試,得到含瓦斯煤滲透率與溫度變化符合負指數(shù)函數(shù)分布,對比修正后的模型計算數(shù)據(jù)發(fā)現(xiàn)其與試驗數(shù)據(jù)有很好的一致性.研究成果為溫度作用下含瓦斯煤滲流的多場耦合問題提供一定的理論基礎(chǔ).
[Abstract]:The effective stress formula based on temperature, gas pressure and gas adsorption expansion is obtained by analyzing the factors affecting permeability of gas-bearing coal. Based on the interaction between the factors affecting permeability, the change of gas pressure caused by temperature increment and the change of coal matrix compression and adsorption expansion stress are given through the Clabelon equation, and the effective stress calculation formula is improved. Taking Kozeny-Carman equation as bridge, the dynamic evolution model of permeability is modified under the influence of temperature, gas pressure and adsorption expansion interaction before the peak value of coal body and under compression condition. The permeability of gas-bearing coal under the action of temperature is tested by self-made experimental system, and the distribution of negative exponential function between permeability and temperature of gas-bearing coal is obtained. Compared with the modified model data, it is found that the model is in good agreement with the experimental data. The research results provide a theoretical basis for the multi-field coupling problem of gas-bearing coal seepage under the action of temperature.
【作者單位】： 河南工程學(xué)院安全工程學(xué)院;中南大學(xué)資源與安全工程學(xué)院;河南省煤礦安全重點實驗室培養(yǎng)基地;
【基金】：河南省高等學(xué)校重點科研項目(17A440002) 國家自然科學(xué)基金項目(51174082,51604091) 河南省重點科技攻關(guān)資助項目(132102210485) 河南省科技開放合作項目(172106000073)
【分類號】：TD712

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