Concatenate 560 files in one

HI all,
could please help me in this code. I have 560 files containing the same columns but different rows. i want to concatenate all these files in one big file. i want to keep the header of the first file then add the dat from other files horizontally.
the name of my files contains 2 variables : chunk number and chromosome number. this an example

code:
IMP_chunk11-chr6_file

i have tried this code but it works only for one variable and 22 files. anu suggestion to adapt it to my case

code :


for p in 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
do
more +2 EUR.chr${p}.Fst > EUR.chr${p}.Fst.tmp
done

cp EUR.chr1.Fst EUR.chr1.Fst.tmp

cat EUR.chr*.Fst.tmp > EUR.all.Fst

thank you veru much