针对平庆煤矿C7+8煤层现用煤与瓦斯突出预测敏感指标临界值与真实临界值不符,导致局部防突措施工程量增大和掘进速度降低,采用历史预测资料统计与分析、实验室研究和现场考察分析相结合的方法,研究确定了C7+8煤层突出主要预测指标K1值为...针对平庆煤矿C7+8煤层现用煤与瓦斯突出预测敏感指标临界值与真实临界值不符,导致局部防突措施工程量增大和掘进速度降低,采用历史预测资料统计与分析、实验室研究和现场考察分析相结合的方法,研究确定了C7+8煤层突出主要预测指标K1值为0.6 m L(g·min1/2)、预测参考指标S值为14 kg/m,通过2个阶段的试验表明,所确定的敏感指标临界值满足矿井安全高效生产要求,能够有效解放生产力和提高经济效益。展开更多
Based on the important role in mine safety played by parameters of the first gas outburst, we propose a method of combining historic data, theoretical analysis and experimental research for the purpose of crit- ical v...Based on the important role in mine safety played by parameters of the first gas outburst, we propose a method of combining historic data, theoretical analysis and experimental research for the purpose of crit- ical values of gas parameters of the first gas outburst in a coal seam of the Xieqiao Mine. According to a characteristic analysis and a summary of the rules of coal and gas outbursts in the No.8 coal seam of a Hua- inan mine, we have investigated their effect on coal and gas outbursts in terms such as ground stress, gas, and coal structure. We have selected gas parameters and determined the critical values of each of the fol- lowing indices： gas content as 7.7 m^3/t, tectonic coal as 0.8 m thick, the absolute gas emission as 2 m3/min, the rate of change as 0.7 m3/min, the gas desorption index of a drilling chip KI as 0.26 mL/（g min^1/2） and the values of desorption indexes Ah2 as 200 Pa. From a verification of the production, the results indicate that application of each index and their critical values significantly improve the level of safety in the pro- duction process, relieve the burden upon the mine, save much labor and bring clear economic benefits.展开更多
文摘针对平庆煤矿C7+8煤层现用煤与瓦斯突出预测敏感指标临界值与真实临界值不符,导致局部防突措施工程量增大和掘进速度降低,采用历史预测资料统计与分析、实验室研究和现场考察分析相结合的方法,研究确定了C7+8煤层突出主要预测指标K1值为0.6 m L(g·min1/2)、预测参考指标S值为14 kg/m,通过2个阶段的试验表明,所确定的敏感指标临界值满足矿井安全高效生产要求,能够有效解放生产力和提高经济效益。
基金supported by the National Key Basic Research Program of China (No.2005CB 221501)the Innovation Scientists and Technicians Troop Construction Projects of Henan Province (No.084200510002)the Program for New Century Excellent Talents in University (No.NCET-07-0257)
文摘Based on the important role in mine safety played by parameters of the first gas outburst, we propose a method of combining historic data, theoretical analysis and experimental research for the purpose of crit- ical values of gas parameters of the first gas outburst in a coal seam of the Xieqiao Mine. According to a characteristic analysis and a summary of the rules of coal and gas outbursts in the No.8 coal seam of a Hua- inan mine, we have investigated their effect on coal and gas outbursts in terms such as ground stress, gas, and coal structure. We have selected gas parameters and determined the critical values of each of the fol- lowing indices： gas content as 7.7 m^3/t, tectonic coal as 0.8 m thick, the absolute gas emission as 2 m3/min, the rate of change as 0.7 m3/min, the gas desorption index of a drilling chip KI as 0.26 mL/（g min^1/2） and the values of desorption indexes Ah2 as 200 Pa. From a verification of the production, the results indicate that application of each index and their critical values significantly improve the level of safety in the pro- duction process, relieve the burden upon the mine, save much labor and bring clear economic benefits.
