一种氡气地表探测覆岩采动裂隙综合试验系统研制与应用

Based on summarizing existing research status of mining-induced fractures developing features in overlying strata and engineering application domains of radon gas, attempting to apply geophysical and chemical properties of radon gas to the field of mining engineering firstly, and introducing the radioactive measurement method to detect the overlying strata mining-induced fractures development process and its containing water quality in underground coal mining, and independently developing a comprehensive test system for detecting overlying strata mining-induced fractures on surface with radon. It mainly contains adjustable two or three dimensional physical simulation test-bed frame, radon gas exporting device and KJD-2000R continuous radon monitor, which has the advantage of installation-dismantlement facility, physical simulation model laying convenience and achieving fast two or three dimensional physical simulation experiment, and overcomes the complexity and ponderosity disadvantage of physical simulation experiment for traditional detecting method. The comprehensive test system has been used to two-dimensional physical simulation for 11203 workface mining of Daliuta mine in Shendong coalfield, and the corresponding law between overlying strata mining-induced fractures evolvement and radon concentration change has been obtained, meanwhile, the feasibility of detecting overlying strata mining-induced fractures on surface with radon also has been validated further.