Research on goaf treatment and geothermal comprehensive utilization technology in coal mining subsidence area

Abstract Goaf treatment and comprehensive utilization of geothermal energy are great significance to the restoration land resources sustainable development in coal mining subsidence areas. In this paper, goaf technology reviewed detail. Among them, mainly includes: caving method, filling support closed isolation method joint method. Geothermal shallow ground source heat pump technology, coaxial casing pumping reinjection directional drilling U-type precision docking technology. The systematic idea area is proposed, described detail through three cases. research results can provide innovative inspiration for control area, has broad application prospects.