CAJ | 학술논문

以鄂尔多斯高家梁煤矿浅埋2-2上煤层上覆广泛分布的砂质泥岩为研究对象，试验测试不同沉积建造砂质泥岩细观结构及矿物成分，并对地层赋存条件不同的采煤工作面裂隙带发育高度进行探测。结果表明：浅埋侏罗系直罗组、安定组砂质泥岩颗粒体积小，颗粒之间点点接触、孔隙小，蒙脱石含量较高，遇水体积膨胀；胶结性差，易断裂且岩层破断后具有一定的阻水能力；构建了浅埋砂质泥岩顶板煤层保水开采评价模型，获得浅埋煤层保水开采的两个基本条件，并提出保水开采评价方法，该方法评价结果与现场实践相一致。
이악이다사고가량매광천매2-2상매층상복엄범분포적사질니암위연구대상，시험측시불동침적건조사질니암세관결구급광물성분，병대지층부존조건불동적채매공작면렬극대발육고도진행탐측。결과표명：천매주라계직라조、안정조사질니암과립체적소，과립지간점점접촉、공극소，몽탈석함량교고，우수체적팽창；효결성차，역단렬차암층파단후구유일정적조수능력；구건료천매사질니암정판매층보수개채평개모형，획득천매매층보수개채적량개기본조건，병제출보수개채평개방법，해방법평개결과여현장실천상일치。
Focusing on widely distributed sandy mudstones above upper No.2-2 coal seam in gao jia-liang mine, Ordos, the microscopic structure and mineral composition of sandy mudstones deposited during different periods were tested, and the fractured zones above working faces with different geolog-ical conditions were further detected. The results show that particle volume of sandy mudstone in Juras-sic Zhiluo and diazepam group is small, with the characteristics of point contact between particles, low voidage, high content of montmorillonite, swelling with water, poor cementation, easy broken, and wa-ter preventing ability after rock fractured. Evaluation model of water-preserved mining in shallow seam with the sandy mudstone roof was constructed, two basic conditions of water preserved mining were obtained, and the evaluation method was put forward. Industrial test shows that the evaluation results are concordance with that of field practice.