CAJ | 학술논문

针对特厚煤层采出率低、“三下”及其他特殊地质条件下特厚煤层采场围岩移动破坏与地表沉陷控制困难的问题，提出了特厚煤层长壁巷式胶结充填开采技术。在研究特厚煤层长壁巷式胶结充填开采技术原理的基础上，系统阐述了该技术的开采系统布置、主要设备与巷式充填开采工艺；并对胶结充填材料的组成及其承载特性进行了研究，确定了适用于工程现场的充填材料干料配比为粉煤灰35%、白灰渣10%、水泥2%、矸石53%，料浆质量分数为79%，该配比充填材料单轴抗压强度可达1.8 MPa。现场工程应用表明：该技术充实率可达96.1%，开采21 m厚的煤层地表下沉最大值为265 mm，地表下沉系数仅为0.0126，应用效果良好。
침대특후매층채출솔저、“삼하”급기타특수지질조건하특후매층채장위암이동파배여지표침함공제곤난적문제，제출료특후매층장벽항식효결충전개채기술。재연구특후매층장벽항식효결충전개채기술원리적기출상，계통천술료해기술적개채계통포치、주요설비여항식충전개채공예；병대효결충전재료적조성급기승재특성진행료연구，학정료괄용우공정현장적충전재료간료배비위분매회35%、백회사10%、수니2%、안석53%，료장질량분수위79%，해배비충전재료단축항압강도가체1.8 MPa。현장공정응용표명：해기술충실솔가체96.1%，개채21 m후적매층지표하침최대치위265 mm，지표하침계수부위0.0126，응용효과량호。
In this paper, the longwall-roadway cemented backfilling mining technology is proposed to solve the engineering technical problems in extra-thick coal seam, such as low recovery rate and the difficulty in controlling the mining surface subsidence and overlying strata movement and deformation. Systematically, its layout of filling mining system, main equipment and technics are explained based on studying the principle of longwall-roadway cemented backfilling mining technology in extra thick coal seam. Moreover, the composition and bearing characteristics of the backfilling materials are studied to determine the optimal ratio of cemented filling materials which is well applied to field work, namely the optimal proportion of fly ash, lime slag, cement and gangue are 35%, 10%, 2% and 53% respectively. Furthermore, the slurry concentration is 79% and its uniaxial compressive strength can reach 1.8 MPa. The field engineering application shows that the filling ratio can reach 96.1% and the maximum surface subsidence value is 265 mm when mining 21 meter thick coal seam, namely the surface sinking coefficient is only 0.012 6, which shows an excellent application effects.