CAJ | 학술논문

为了提高多伦协鑫煤矿水体下综放开采的利用率,以1704-1工作面为例,运用地质勘探、实验室土工试验和理论分析等研究方法,分析获得第三系砂砾含水层性质和粘土层性质,从而确定了安全煤(岩)柱留设类型,进而确定安全煤(岩)柱合理留设尺寸和工作面安全开采厚度。结果表明1704-1工作面上方第三系砂砾岩含水层为弱富水性,安全煤(岩)柱可根据防砂安全煤(岩)柱留设；没有赋存砂砾岩含水层的“底粘区”,粘土厚度大,流动性差,安全煤(岩)柱可根据防塌安全煤(岩)柱留设；1704-1工作面“底粘区”最小防塌安全煤(岩)柱留设为49??65 m,采用综放全厚开采；“底砾区”最小防砂安全煤(岩)柱留设为59??99 m,采用综放限制采厚7??78 m 开采。
위료제고다륜협흠매광수체하종방개채적이용솔,이1704-1공작면위례,운용지질감탐、실험실토공시험화이론분석등연구방법,분석획득제삼계사력함수층성질화점토층성질,종이학정료안전매(암)주류설류형,진이학정안전매(암)주합리류설척촌화공작면안전개채후도。결과표명1704-1공작면상방제삼계사력암함수층위약부수성,안전매(암)주가근거방사안전매(암)주류설；몰유부존사력암함수층적“저점구”,점토후도대,류동성차,안전매(암)주가근거방탑안전매(암)주류설；1704-1공작면“저점구”최소방탑안전매(암)주류설위49??65 m,채용종방전후개채；“저력구”최소방사안전매(암)주류설위59??99 m,채용종방한제채후7??78 m 개채。
In order to improve the efficiency of full-mechanized caving mining under water body in Duolun Xiexin Mine,taking No.1704-1 working face as the example,the paper uses the geological exploration,laboratory geotechnical test and theoretical analysis methods to analyze the properties of Tertiary gravel aquifer and clay layer,based on which,it determines the type of safety coal (rock)pillar and reasonable size of safety coal (rock)pillar and safe mining thickness of the working face.The results show that the water-bearing property of Tertiary gravel aquifer above No.1704 -1 working face is weak,so the size of the safety coal (rock)pillar can be set refer-ring to the sand-proof pillar;in the clay area without the gravel aquifer,the clay is thick with poor mobility,so the size of the safety coal (rock)pillar can be set referring to the collapse-proof pillar;in the clay area of 1704 -1 working face,the minimum size of the collapse-proof pillar is 49.65 m,and the fully mechanized full-thickness caving mining is adopted;in gravel area,the minimum size of the sand-proof pillar is 59.99m,and the fully-mechanized caving mining with limit thickness of 7.78m is applied.