【摘要】：為研究深部開(kāi)采沖擊地壓誘導(dǎo)瓦斯異常涌出致災(zāi)機(jī)理,分析了深部開(kāi)采煤體高地應(yīng)力和高瓦斯含量的物性特征,揭示出沖擊地壓誘發(fā)瓦斯涌出的動(dòng)力條件和物質(zhì)條件,結(jié)合KozenyCarmen方程建立煤體滲透率與開(kāi)采影響下?lián)p傷裂隙煤體體積應(yīng)變的關(guān)系式。研究結(jié)果表明:沖擊失穩(wěn)過(guò)程中煤體滲透率增加顯著,沖擊地壓產(chǎn)生的振動(dòng)效應(yīng)加速煤體變形破壞,促使瓦斯快速大量涌出;沖擊地壓孕育過(guò)程中的煤體滲透率變化效應(yīng)、煤體形成剪切滑移面效應(yīng)、沖擊地壓誘發(fā)的煤巖體振動(dòng)效應(yīng)以及煤體溫度升高效應(yīng)的聯(lián)合作用,導(dǎo)致了沖擊地壓后瓦斯的異常涌出。
[Abstract]:In order to study the mechanism of abnormal gas emission induced by rock burst in deep mining, the physical properties of high ground stress and high gas content of deep mining coal body are analyzed, and the dynamic and material conditions of gas emission induced by impact ground pressure are revealed. Based on KozenyCarmen equation, the relationship between coal permeability and volume strain of damaged fractured coal under the influence of mining is established. The results show that the permeability of coal body increases significantly in the process of impact instability, and the vibration effect caused by impact ground pressure accelerates the deformation and destruction of coal body, and promotes the rapid emission of gas. The coal permeability change effect, the shear slip surface effect, the coal rock mass vibration effect induced by the impact ground pressure and the coal body temperature rise effect during the inoculation process of the impact ground pressure are combined. This results in the abnormal gushing of gas after the impact ground pressure.
【作者單位】： 西安科技大學(xué)能源學(xué)院;
【基金】：國(guó)家自然科學(xué)基金科學(xué)儀器基礎(chǔ)研究專(zhuān)款資助項(xiàng)目(51327007)
【分類(lèi)號(hào)】：TD712

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本文編號(hào)：2322067