In 1921 strikes were effectively illegal in the state of Kansas due a state arbitration system (the Industrial Court). In response the Kansas miners struck, the strike nearly failed due to actions of their own Union leadership, but rallied when the women of the mining community began their own campaign.
Article by the United Mine Workers of America, 20 years on from the 10-month-long Pittston Coal strike in Virginia. As you would expect from an official union account it omits to mention the wildcat strikers and violent acts of sabotage but contains interesting historical information.
Racial conflict and racial solidarity in the Alabama coal strike of 1894: new evidence for the Gutman-Hill debate - Alex Lichtenstein
“You understand we are radical”: the United Mine Workers of America, District 18 and The One Big Union, 1919-1920
The story of the United Mine Workers of America District 18 and their path into, and then later out of, the radical One Big Union.