Good! I needed to know if there is a way to prevent DataTables from collapsing the columns, and also if there is any way to use columns.visible to make the column invisible, but not space too!
For easier understanding:
This is what I want to always happen:
Butsometimesthedatatablesdothis,puttingtheOperationscolumninachildtd... 
You can disable this behavior with the "responsive" setting by setting the "details" option to false . So, in the DataTable configuration:
$(document).ready(function() {
$('#tabela').DataTable( {
//... outras configurações
responsive: {
details: false
}
} );
} );
This way the childs will not appear, but if you want to show them by default, the configuration is this:
$(document).ready(function() {
$('#tabela').DataTable( {
responsive: {
details: {
display: $.fn.dataTable.Responsive.display.childRowImmediate,
type: ''
}
}
});
});