Compagnie des mines de Béthune
Mazingarbe
### Mazingarbe

Excavation of Mine 6 at Mazingarbe began in October 1874 and reached an irregular bed of coal at .
Extraction began in 1876 using a  extraction machine.
Mine 6 was connected to Mine 1 in 1877\.
Shaft 6bis was opened in August 1885\.
Mine 7 was started in April 1875 at Mazingarbe, and reached coal at .
Extraction started in May 1877 using the old extraction machine from Mine 1\.
Shaft 7bis was added in 1905\.


Can you give examples of other mines that were connected to a main mine?