CAJ | 학술논문

针对煤与瓦斯突出危险性预测问题，对煤层释放瓦斯膨胀能进行了深入研究。根据瓦斯膨胀能基本计算方法，以煤层瓦斯流动压力场分布规律为基础，分别建立了煤壁释放瓦斯膨胀能和钻孔释放瓦斯膨胀能理论方程式；并应用 MATLAB 数值模拟软件，进一步对钻孔释放瓦斯膨胀能进行了分析计算。结果表明：钻孔释放瓦斯膨胀能在释放时间前3s内下降急聚，且该能量大小受煤层瓦斯压力影响最大，受透气性系数影响次之，受瓦斯含量系数影响最小。钻孔释放瓦斯膨胀能真实反映了实际煤层瞬间释放瓦斯的能力，矿井在煤层瓦斯压力测定时，通过实测钻孔释放瓦斯膨胀能，可以准确预测煤层突出危险性。
침대매여와사돌출위험성예측문제，대매층석방와사팽창능진행료심입연구。근거와사팽창능기본계산방법，이매층와사류동압력장분포규률위기출，분별건립료매벽석방와사팽창능화찬공석방와사팽창능이론방정식；병응용 MATLAB 수치모의연건，진일보대찬공석방와사팽창능진행료분석계산。결과표명：찬공석방와사팽창능재석방시간전3s내하강급취，차해능량대소수매층와사압력영향최대，수투기성계수영향차지，수와사함량계수영향최소。찬공석방와사팽창능진실반영료실제매층순간석방와사적능력，광정재매층와사압력측정시，통과실측찬공석방와사팽창능，가이준학예측매층돌출위험성。
Aiming at the problems about prediction techniques for coal and gas outburst hazard, an in-depth study on dilatation energy of released gas from coal seam is conducted. Following the basic calculation methods of dilatation energy, based on the distribution rules of gas released from coal seam, the theoretical equations of dilatation energy of released gas from coal ribs and drilling boreholes have been derived respectively. In addition, by using the numerical simulation software of MATLAB, dilata-tion energy released from the drilling boreholes was further analyzed and calculated. The results show that there is a sharp decrease for the value of dilatation energy of released gas within the first 3 seconds in releasing time. The biggest factor affecting the energy is coal in-seam gas pressure;the second big-gest factor is permeability coefficient;while the least one is the coefficient of gas content. Therefore, the dilatation energy of released gas from drilling boreholes can really reflect the instantaneous gas release ability of a coal seam. The measurement result of dilatation energy can be used as a predictor for the risk of coal outburst hazard when the coal in-seam gas pressure is determined in a field test.