岩土力学
巖土力學
암토역학
ROCK AND SOIL MECHANICS
2014年
z1期
1-7
,共7页
煤与瓦斯突出%掘进工作面%硬煤薄板理论%模拟试验
煤與瓦斯突齣%掘進工作麵%硬煤薄闆理論%模擬試驗
매여와사돌출%굴진공작면%경매박판이론%모의시험
coal and gas outburst%coal roadway tunneling face%thin plate theory of hard coal%simulation experiment
为深入探讨硬煤的煤与瓦斯突出机制，对深部硬煤掘进工作面煤与瓦斯突出的相关理论和模型试验进行研究。根据断裂力学、岩石力学及煤与瓦斯突出有关理论，提出深部开采过程中硬煤掘进工作面薄板理论假设，并将该理论应用于深部硬煤掘进工作面煤与瓦斯突出模拟试验研究。对硬煤掘进工作面薄板理论分析，认为工作面尺寸、煤的弹性模量、围岩侧压系数、瓦斯压力等因素对硬煤掘进工作面突出具有较大影响。试验结果表明，在围岩应力、煤的坚固性系数较大的情况下，硬煤突出临界条件主要受围岩应力、煤的弹性模量、围岩侧压系数及工作面尺寸等因素影响，而受瓦斯压力影响相对较小；在围岩应力、试样的坚固性系数较大且煤的弹性模量和侧压系数稳定不变的情况下，发生突出的临界轴向应力随模拟工作面尺寸增大而近似呈线性减小。试验结论基本符合本硬煤突出薄板模型理论公式，在一定程度上验证了硬煤掘进工作面煤薄板模型理论及硬煤掘进工作面突出机制假设。
為深入探討硬煤的煤與瓦斯突齣機製，對深部硬煤掘進工作麵煤與瓦斯突齣的相關理論和模型試驗進行研究。根據斷裂力學、巖石力學及煤與瓦斯突齣有關理論，提齣深部開採過程中硬煤掘進工作麵薄闆理論假設，併將該理論應用于深部硬煤掘進工作麵煤與瓦斯突齣模擬試驗研究。對硬煤掘進工作麵薄闆理論分析，認為工作麵呎吋、煤的彈性模量、圍巖側壓繫數、瓦斯壓力等因素對硬煤掘進工作麵突齣具有較大影響。試驗結果錶明，在圍巖應力、煤的堅固性繫數較大的情況下，硬煤突齣臨界條件主要受圍巖應力、煤的彈性模量、圍巖側壓繫數及工作麵呎吋等因素影響，而受瓦斯壓力影響相對較小；在圍巖應力、試樣的堅固性繫數較大且煤的彈性模量和側壓繫數穩定不變的情況下，髮生突齣的臨界軸嚮應力隨模擬工作麵呎吋增大而近似呈線性減小。試驗結論基本符閤本硬煤突齣薄闆模型理論公式，在一定程度上驗證瞭硬煤掘進工作麵煤薄闆模型理論及硬煤掘進工作麵突齣機製假設。
위심입탐토경매적매여와사돌출궤제，대심부경매굴진공작면매여와사돌출적상관이론화모형시험진행연구。근거단렬역학、암석역학급매여와사돌출유관이론，제출심부개채과정중경매굴진공작면박판이론가설，병장해이론응용우심부경매굴진공작면매여와사돌출모의시험연구。대경매굴진공작면박판이론분석，인위공작면척촌、매적탄성모량、위암측압계수、와사압력등인소대경매굴진공작면돌출구유교대영향。시험결과표명，재위암응력、매적견고성계수교대적정황하，경매돌출림계조건주요수위암응력、매적탄성모량、위암측압계수급공작면척촌등인소영향，이수와사압력영향상대교소；재위암응력、시양적견고성계수교대차매적탄성모량화측압계수은정불변적정황하，발생돌출적림계축향응력수모의공작면척촌증대이근사정선성감소。시험결론기본부합본경매돌출박판모형이론공식，재일정정도상험증료경매굴진공작면매박판모형이론급경매굴진공작면돌출궤제가설。
The related theory and model tests of coal and gas outbursts in the face of hard coal roadway tunneling in the deep coal seam were studied to explore the coal and gas outburst mechanism of hard coal. Based on fracture mechanics, rock mechanics and theory of coal and gas outburst, a hypothesis of thin plate theory of coal roadway tunneling in the deep coal seam was proposed, and used to the model tests. The analysis results of thin plate theory of coal roadway tunneling in the deep coal seam show the size of working face, elastic modulus, the coefficient of lateral pressure and gas pressure have a great influence on coal and gas outbursts in the face of hard coal roadway tunneling in the deep coal seam. The results of model tests show that under the condition of large stress of surrounding rock and the consistence coefficient of coal, the critical conditions of coal and gas outbursts in the face of hard coal roadway tunneling in the deep coal seam are affected mainly by the surrounding rock stress, the elastic modulus, the coefficient of lateral pressure and the size of working face, and less affected by gas pressure. Under the condition of the large stress of surrounding rock, the large consistence coefficient of coal, the constant elastic modulus and the constant coefficient of lateral pressure, the critical axial stress of the model tests decreases approximate linearly with the increases of the working face size. The results of the model tests basically conform to the thin plate theory of coal roadway tunneling in the deep coal seam, which verify the hypothesis of thin plate theory of coal roadway tunneling in the deep coal seam.
