CAJ | 학술논문

为解决华泰矿业有限公司地下采空区危害及煤矸石骨料不足的问题，通过现场调研、室内试验、理论分析，对煤矸石充填骨料替代品砂岩、页岩、钢渣的物化性能及其充填配比实验和胶结机理进行深入研究。结果表明，钢渣是合适的替代骨料，其胶结体具有较高的抗压和抗拉强度；推荐水泥∶粉煤灰∶钢渣＝1∶8∶15，质量分数Cw＝70％～72％，减水剂添加量为水泥与粉煤灰质量总和的0.5％～1.0％。应用于华泰矿业的结果表明，该技术是可行的，钢渣的利用率高达100％，充填体的抗压强度高达2.0 MPa，顶板最大下沉量仅1.207 mm，未发生地表塌陷，矿石回收率达82.37％。应用该技术可以充分回收“三下”煤炭资源，具有较高的经济效益。
위해결화태광업유한공사지하채공구위해급매안석골료불족적문제，통과현장조연、실내시험、이론분석，대매안석충전골료체대품사암、혈암、강사적물화성능급기충전배비실험화효결궤리진행심입연구。결과표명，강사시합괄적체대골료，기효결체구유교고적항압화항랍강도；추천수니∶분매회∶강사＝1∶8∶15，질량분수Cw＝70％～72％，감수제첨가량위수니여분매회질량총화적0.5％～1.0％。응용우화태광업적결과표명，해기술시가행적，강사적이용솔고체100％，충전체적항압강도고체2.0 MPa，정판최대하침량부1.207 mm，미발생지표탑함，광석회수솔체82.37％。응용해기술가이충분회수“삼하”매탄자원，구유교고적경제효익。
Through field investigation , laboratory test and theoretical analysis , a feasibility study concerning substitution of aggregate of coal gangue was carried out to figure out a solution for poten -tial hazards in mined-out areas owned by the Huatai Mining Corporation Ltd.and the problem of shortage of coal gangue aggregate faced by this mining enterprise.The physical-chemical properties , the proportion of filling materials and the cementing mechanism of filling alternatives including sand-stone , shale and steel slag were investigated .The results show that the steel slag , high in both com-pressive and tensile strength , is a suitable alternative.Recommended ratio is 1∶8∶15 ( cement to fly ash to slag ) , with mass fraction being 70%~72%, and the dosage of the adding reducing agent be-ing 0.5%~1.0%of the total mass of cement and fly ash.Application of this filling formula in Hua-tai Mining Corporation Ltd.proves its feasibility , with 100% steel slag utilization , 2.0 MPa com-pressive strength , and 1.207 millimeter maximum roof deflection.No defection is detected in the surface, and the recovery ratio is 82.37%.Application of this technique is therefore capable of re-leasing the “three underneath” coal resources to generate enormous economic benefit .