CAJ | 학술논문

为了解决公路下安全高效开采技术问题，将工程实践、岩移观测、数值计算、理论分析相结合，对黄土沟壑区开采沉陷特征及公路下开采技术进行了研究。结果表明：由于煤层埋藏浅，第四系冲积层厚度大强度低，覆岩破坏剧烈，导水裂缝带直达地表，综放回采初期在上下顺槽内侧和切眼外侧出现台阶裂缝，裂缝走向与回采边界平行，落差较小；煤层开采达到或超过充分采动后在回采边界岩体沿煤壁整体切落，地表出现大的台阶裂缝；地表台阶裂缝的出现受地形影响比较明显，边坡土体在重力作用和开采沉陷影响下，地表裂缝更加发育；路基下部的厚黄土层可吸收部分开采沉陷变形，对减轻公路破坏发挥了一定作用；可按台阶裂缝角划定公路保护煤柱，煤柱内不放煤，地表及时采取措施可实现公路的安全运行。研究成果为相似地质条件公路下煤矿开采提供了技术参考。
위료해결공로하안전고효개채기술문제，장공정실천、암이관측、수치계산、이론분석상결합，대황토구학구개채침함특정급공로하개채기술진행료연구。결과표명：유우매층매장천，제사계충적층후도대강도저，복암파배극렬，도수렬봉대직체지표，종방회채초기재상하순조내측화절안외측출현태계렬봉，렬봉주향여회채변계평행，락차교소；매층개채체도혹초과충분채동후재회채변계암체연매벽정체절락，지표출현대적태계렬봉；지표태계렬봉적출현수지형영향비교명현，변파토체재중력작용화개채침함영향하，지표렬봉경가발육；로기하부적후황토층가흡수부분개채침함변형，대감경공로파배발휘료일정작용；가안태계렬봉각화정공로보호매주，매주내불방매，지표급시채취조시가실현공로적안전운행。연구성과위상사지질조건공로하매광개채제공료기술삼고。
In order to realize safe and high efficient mining under highway,the ground subsidence law and mining tech-nology under highway in loess hilly-gully region were studied deeply through the comprehensive application of the engineering practice,field observation,numerical simulation and theoretical studies. The results showed that:because of the coal seam bur-ied shallowly,the heavy thickness and the low strength of the Quaternary alluvium,the overlying rock strata in stope damaged severely and water conducted zone reaching to surface directly. At the initial of the fully-mechanized top-coal caving, step cracks appear inside of gate roads and outside of the cutting hole. Fracture trend parallel to the stope boundary,with small step throw. When coal mining reach or exceed the full mining,rock mass is cut down as a whole along the coal wall at the mining boundary,and big step cracks appear at the surface. The surface cracks are greatly affected by terrain. The surface cracks are well developed under the action of gravity and coal mining subsidence. The thick soil lager under subgrade can absorb part of the mining subsidence deformation,and this played a certain role in reducing highway damage. The coal pillar for highway safe-ty can be designed by the steps cracks angle,and these pillars are not mined. The highway can run safely with some measures taken. This research provides a reliable reference for coal mining under highway with similar geological conditions.