2) coal mass strength
煤体强度
1.
Aimed at controlling rocks in soft and thick coal seams, according to the occurrence of coal seam in 11151 working face in Liangbei coal mine, Shenhuo group, Henan province, the influence law between mining thickness, coal mass strength and the abutment pressure, rock deformation was simulated and analyzed with Flac 5.
0数值计算软件模拟分析了煤层采高和煤体强度对工作面超前支撑压力和围岩变形的影响规律,现场实测了梁北矿11151极软厚煤层大采高工作面超前支撑压力的分布规律,实测与数值计算结果相吻合。
2.
A method for determination of coal mass strength through boring is proposed.
提出了利用打钻过程测定煤体强度的方法。
3) coal strength
煤体强度
1.
Then another formula is given to evaluate the coal strength decrease caused by.
取Griffith断裂理论中临界应力为煤体强度指标,给出了煤体吸附气体后强度下降的计算公式,对煤体自由膨胀条件下吸附CH4和CO2强度降低的情况进行了对比分析。
4) strength of coal seam
煤层强度
5) high-strength briquette
高强型煤
补充资料：标准煤(见煤当量)
标准煤(见煤当量)
standard coal
、~‘~1人、4《1工兀飞coal)见煤当等
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条