河南理工大学学报（自然科学版）2026，Vol.45Issue(2)：22-30,85,10.DOI:10.16186/j.cnki.1673-9787.2025080034
城镇建(构)筑物下充填开采技术及合理工艺设计
Backfilling mining technology and rational process design for coal seams beneath urban buildings
摘要
Abstract
Objectives To address the challenge of large amounts of coal resources constrained beneath ur-ban buildings,which restrict the sustainable development of coal mines,Chengjiao Coal Mine was selected as a test site to investigate rational backfilling mining technologies and process designs for coal seams be-neath urban buildings.Methods Using engineering analogy,scheme comparison,and theoretical calcula-tion methods,and based on the principle that backfilling mining beneath buildings must prevent surface subsidence,four mining schemes were proposed:fully mechanized mining with cemented paste backfill-ing,new solid backfilling mining,super-high-water backfilling mining,and overburden isolation grouting backfill mining.The strata control effects of different schemes were analyzed,and the optimal scheme was determined as fully mechanized mining with cemented paste backfilling.Support height was determined ac-cording to coal seam thickness,and the working resistance of the support was calculated based on resis-tance to lateral paste pressure and control of roof subsidence at the filling face.A coordinated"isolation-backfilling-coal mining"process was designed to eliminate mining-filling interference.Based on the roles of the backfilling body during the solidification and coal mining stages,the early strength,stability safety fac-tor,and later-stage strength of the backfilling body were determined.Mix proportion experiments and me-chanical property tests of paste backfilling materials were conducted.Results The minimum and maximum structural height of the paste backfilling support are 2.0 m and 3.8 m,respectively,with an extension ratio of 1.9.The working resistance of the support exceeds 8 250 kN.The compressive strength of the paste back-filling body is not less than 0.06 MPa during the solidification stage and not less than 0.16 MPa during the coal mining stage.With a strength stability safety factor of 2.5,the uniaxial compressive strength of the paste backfilling body after 28 days of curing is not less than 2.97 MPa.Economical mix proportions that satisfy strength requirements were obtained for fly ash paste and gangue-fly ash paste backfilling materials.Conclusions The rational backfilling mining technology and process design for coal seams beneath urban buildings applied at Chengjiao Coal Mines can provide valuable references for similar mines in China.关键词
"三下"采煤/充填开采/充填工艺设计/城镇下压煤/充填方案Key words
coal mining under buildings,water bodies and railways/backfilling mining/backfilling process design/coal seams beneath urban areas/backfilling scheme分类
矿业与冶金引用本文复制引用
张洋,周雨顺,王方田,鲁岩,郝文华,王旭..城镇建(构)筑物下充填开采技术及合理工艺设计[J].河南理工大学学报（自然科学版）,2026,45(2):22-30,85,10.基金项目
国家自然科学基金资助项目(52474151) （52474151）
中央高校基本科研业务费专项资金资助项目(2023ZDPY03) （2023ZDPY03）
