增强型集气覆盖层闭气能力影响因素及优化布置

李光耀,刘思达,李鹤,詹良通,夏敏

Factors affecting gas closure capacity of enhanced gas collection cover and optimized arrangement

Guangyao LI,Sida LIU,He LI,Liangtong ZHAN,Min XIA

表 2 不同类型粗粒土对应的集气管间距

Tab.2 Arrangement spacing of gas collection pipes for different types of coarse-grained soil

类型 K/m2 L/m p = 0 kPa p = −1 kPa p = −2 kPa p = −3 kPa p = −4 kPa p = −5 kPa 碎石、粗砂 10−11~10−10 0.3~3.0 0.8~8.0 2~22 6~60 17~170 45~450 中砂 10−12~10−11 0.03~0.3 0.08~0.8 0.2~2 0.6~6 1.7~17 4.5~45 细砂、粉砂 10−13~10−12 0.003~0.03 0.008~0.08 0.02~0.2 0.06~0.6 0.17~1.7 0.45~4.5