松软煤层裂隙发育规律相似模拟实验研究

Similarity Simulation Experiment on Fracture Development Law of Soft Coal Seam

我国高瓦斯松软煤层矿井瓦斯抽采效率较低,究其原因是因为钻孔周边存在裂隙,导致了漏风的产生,因此裂隙发育的情况成为研究重点。通过相似模拟实验,对不同含水率的型煤进行钻孔,提取钻孔周边裂隙分布情况,并对其进行研究。结果表明:不同含水率的型煤孔周裂隙分布具有差异,且大部分裂隙长度小于5 mm,并在此基础上,对造成差异性的原因进行实验分析。

The gas extraction efficiency of the high gassy soft coal mine in our country is low, the reason is that the cracks around the borehole lead to the generation of air leakage, so the development of cracks becomes the focus of study. By simulating experiment, the coal with different water content is drilled, and the distribution of the fracture around the borehole is extracted and studied. The results show that there are differences in the distribution of holes and fissures in the boreholes with different moisture content, most of them are less than 5 mm, and analyzing the reason for difference of experiment on this foundation .