Complete set technology and application of comprehensive treatment of construction land in coal mining subsidence area

Taking the construction of the proposed office center in the coal mining subsidence area of Huaibei Mining Group as an example, the comprehensive survey technology for the old goaf is proposed; Based on the residual space of the old goaf, the distribution law of fissures in fractured rock mass, the deformation and failure law of the old goaf under the action of building load and the time effect of surface deformation, an evaluation method for the stability of the foundation of construction land in the coal mining subsidence area is proposed; Based on the residual space of the old goaf, the distribution law of fissures in the cracked rock mass, the deformation and failure law of the old goaf under the action of building load and the time effect of surface deformation, an evaluation method for the stability of the foundation of the construction land in the coal mining subsidence area is proposed. Based on the engineering practice, the design and detection methods for the grouting treatment of the old goaf are proposed, and the inspection standards for the treatment effect of the old goaf are preliminarily formed; Finally, a complete set of technologies for comprehensive management of construction land in coal mining subsidence area has been formed, including old goaf survey technology, coal mining subsidence area foundation stability evaluation technology, old goaf grouting treatment technology, grouting effect detection and post evaluation technology. The application of this technology provides a new way for the utilization of land resources in coal mining subsidence areas.