CAJ | 학술논문

以榆神矿区小保当井田2－2煤层覆岩为地质原型，基于区域地质条件和3个代表性钻孔构建了30个不同岩土比类型的数值模型，运用数值模拟试验的方法研究在地质条件和开采工艺相同的情况下，覆岩岩土比对开采沉陷的影响规律。研究结果表明：在250 m和300 m 埋深水平下，下沉系数都会随着岩土比的增大而减小；在350 m 埋深水平下，下沉系数整体上呈现随岩土比增大而变小的趋势(岩土比为2∶1的点除外)。针对3种不同埋深水平建立了岩土比与下沉系数的量化关系；在不同的埋深水平下，岩土比对下沉系数的影响程度不同，随着埋深的增加，下沉系数的减小幅度基本表现为先变大后变小。
이유신광구소보당정전2－2매층복암위지질원형，기우구역지질조건화3개대표성찬공구건료30개불동암토비류형적수치모형，운용수치모의시험적방법연구재지질조건화개채공예상동적정황하，복암암토비대개채침함적영향규률。연구결과표명：재250 m화300 m 매심수평하，하침계수도회수착암토비적증대이감소；재350 m 매심수평하，하침계수정체상정현수암토비증대이변소적추세(암토비위2∶1적점제외)。침대3충불동매심수평건립료암토비여하침계수적양화관계；재불동적매심수평하，암토비대하침계수적영향정도불동，수착매심적증가，하침계수적감소폭도기본표현위선변대후변소。
Taking the overlying strata of 2 -2 coal seam in Xiaobaodang mine field in Yushen mining area as geological model,30 numerical models with different rock-soil ratio were struc-tured on the basis of regional geological conditions and 3 typical drillings. With the method of nu-merical simulation,the effect law of the rock-soil ratio on the mining subsidence was researched under the same geological condition and mining technology. The results showed that the subsid-ence coefficient would decrease with the increase of the rock-soil ratio at the buried depth of 250 m and 300 m;at the buried depth of 350 m,the subsidence coefficient decreased with the increase of rock-soil ratio as a whole except that the rock-soil ratio was 2∶1. The quantitative relation be-tween the subsidence coefficient and the rock-soil ratio was built under three different depth lev-els. Under the different depth levels,the degree of the effect of the rock-soil ratio on the subsid-ence coefficient was different,and with the increase of buried depth,the decrease extent of the subsidence coefficient got bigger before it got smaller.