Method for determining reasonable distance of working face mining roadway advanced reinforcing support

The invention discloses a method for determining a reasonable distance of a working face mining roadway advanced reinforcing support, and relates to the technical field of working face mining roadway advanced reinforcing supports. The method comprises the following steps: firstly, arranging a plurality of field observation stations in a mining roadway; secondly, adopting a radon measuring instrument, a borehole stressometer and an anchor rod (cable) stressometer to monitor the radon gas concentration, the coal stress and the anchor rod stress of the coal body at the site observation stations during working face stoping; and then, extracting monitoring data to analyze a dynamic change relationship between the radon gas concentration of the coal body, the stress of the coal body and the stress of the anchor rod and the distance between the field observation stations and the working surface, comprehensively comparing results obtained by the three monitoring methods, and accurately determining the reasonable dist