摘要
为研究不同采放比的覆岩裂隙范围,采用理论计算和数值模拟实验相结合的方法,对采后的裂隙带范围进行了分析。采用理论分析对综放采高为8 m时的裂隙带范围进行了计算,得到裂隙带的范围大约是53.8~100 m。采用UDEC数值模拟的方法对不同采放比时的裂隙带范围进行了实验分析,从分析结果看出,裂隙带高度在理论计算的数值范围内,并且可以得出,随着采放比的不断增加裂隙范围也是在不断的减小的。最终基于矿井的生产具体条件确定采放比为1∶1,即采4 m放4 m。
In order to study ranges of overburden fractures with different mining ratios, the method that combining theoretical calculation with numerical simulation experiment was adopted to analyze range of fracture zones after mining. Theoretical analysis was used to analyze range of fracture zones when fully mechanized mining height was 8m, and the range was about 53.8-100 m. UDEC numerical simulation method was used to experimentally analyze the fracture zone range at different mining ratios, the simulation result showed that the fracture zone height was inside range of numerical calculation. With increasing mining ratios, the crack range was gradually decreased. Finally, based on mine specific production conditions, ratio of mining was determined as 1 ： 1, which meant mining was 4 m and discharging was 4 m.
出处
《煤炭与化工》
CAS
2017年第8期6-8,11,共4页
Coal and Chemical Industry
关键词
综放开采
裂采比
采放比
数值模拟
fully mechanized mining
crack production ratio
caving ratio
numerical simulation
