CAJ | 학술논문

根据王家山煤矿一、二号井急斜坚硬特厚煤层水平分层走向长臂轻型放顶煤工作面，回采过程中因煤质坚硬、煤层有冲击倾向性易于集聚弹性能等客观条件，导致回采过程中顶煤不宜放出、回采率低、坚硬煤体易生矿压显现等问题，进行了针对性技术方案研究，提出采用用煤层俯孔超前预裂注水技术，使其具有顶煤弱化破碎效果好、兼有煤体预裂卸压作用、省工省时便于操作等优点。
근거왕가산매광일、이호정급사견경특후매층수평분층주향장비경형방정매공작면，회채과정중인매질견경、매층유충격경향성역우집취탄성능등객관조건，도치회채과정중정매불의방출、회채솔저、견경매체역생광압현현등문제，진행료침대성기술방안연구，제출채용용매층부공초전예렬주수기술，사기구유정매약화파쇄효과호、겸유매체예렬사압작용、성공성시편우조작등우점。
According to the horizontal longwall top coal caving face with light weight on sharp, hard and extra-thick seam in No.1 and No.2 pit of Wangjiashan Mine, in the caving process, since the coal is hard, outburst-prone and easy to gather elastic energy, the top coal is difficult to release and low in recovery rate and hard coal is liable to strata pressure behavior. Correspondingly, top coal advanced water injection technology in overhead borehole is proposed, which has not only ideal weakening and breaking effects on the top coal, but also pre-splitting and unloading effect. Besides, the technology has advantages as saving work and time and being easy to operate.