Based on the difficulty that fracturing fluid with high viscosity is unable to break and flow back timely in thelow-temperature coal seams,the feasibility of chlorine dioxide(ClO2) as gel-breaker of fracturing fluid and its impacton coalbed methane(CBM) development were studied. Different rank coal samples were treated with clean fracturingfluid,cross-linked gel fracturing fluid and ClO2solution,and were tested by optical microscope,isothermal adsorptionand mercury porosimetric method,etc. The experiment re...