Design and application of large-scale grouting and filling of coal gangue at Caojiatan Coal Mine
In order to dispose the large amount of coal waste rock,in the mining process at Caojiatan Coal Mine,which causes land resources waste and environmental pollution,a set of large-scale grouting and filling process is designed for the gangue crushing,slurry preparing,pumping and pipe transportation.It employs a scheme of three-level grading crushing plus ball milling pulverizing,which applied more crushing and less milling links on the surface.The coal waste slurry is grouted into underground goaf caving zone,which can process 1 Mt/a waste rock.The on-site practice shows that slurry grouting is efficient;the No.1 and No.2 boreholes can practically process 0.038 Mt coal waste rock,theoretically process 0.046886 Mt.The waste pile height and radium are in line with expectation,which efficiently reduce mine area environmental pollution as well as waste rock ship-out cost,realizing large-scale disposal of coal waste rock.
万方数据
维普
