Hermeneutics is the practice of interpretation which originates from scholars trying to decypher or disambiguate old texts.
A participative hermeneutics would therefor invite 'participants' to intrude on the perceived monopoly which scholars hold over the action of interpretation.
This imagines a de-monopolisation (of academic discourse) as part of Civil Discourse in the Public Sphere. It could, if properly enabled facilitate a critical reading of how our epistemics are institutionalised.
It is also a response to Hermeneutical Injustice as described by Miranda Fricker in her book Epistemic Injustice, Power and the Ethics of Knowing.