岩石力学与工程学报
巖石力學與工程學報
암석역학여공정학보
CHINESE JOURNAL OF ROCK MECHANICS AND ENGINEERING
2014年
8期
1572-1588
,共17页
夏开宗%刘秀敏%陈从新%付华%张海娜%张建军%吴艳梅
夏開宗%劉秀敏%陳從新%付華%張海娜%張建軍%吳豔梅
하개종%류수민%진종신%부화%장해나%장건군%오염매
采矿工程%地下开采%水平应力%地表变形规律
採礦工程%地下開採%水平應力%地錶變形規律
채광공정%지하개채%수평응력%지표변형규률
mining engineering%underground mining%horizontal stress%surface deformation
以湖北鄂州程潮铁矿西区为例,依据近6 a的地表水平位移、沉降位移变形监测成果,对地下开采引起的地表变形规律进行分析。结果表明:程潮铁矿西区从地表塌陷至今,等值线、移动线和陷落线在矿区东北端扩展最多,并且在2010年1月,设置的关卡门至措施井往西约150 m的矿区公路(以下简称矿区公路)、粉矿堆场及运输隧道东南端处的地表岩体突然加速,究其原因是矿区水平应力得到较大程度的释放,特别是东北端,使得矿区公路和粉矿堆场处深部岩体开始形成弯曲折断面,目前进入沿着高陡倾角的拉张裂缝向采空区的倾倒滑移破坏阶段,地表岩体以快速变形为主,而运输隧道东南端处的深部岩体只是发生弯曲变形,地表岩体在经历较短时间的快速变形之后,又线性稳定增长,进入倾倒破坏阶段。其成果能为其他类似的金属矿山工程提供可借鉴的规律。
以湖北鄂州程潮鐵礦西區為例,依據近6 a的地錶水平位移、沉降位移變形鑑測成果,對地下開採引起的地錶變形規律進行分析。結果錶明:程潮鐵礦西區從地錶塌陷至今,等值線、移動線和陷落線在礦區東北耑擴展最多,併且在2010年1月,設置的關卡門至措施井往西約150 m的礦區公路(以下簡稱礦區公路)、粉礦堆場及運輸隧道東南耑處的地錶巖體突然加速,究其原因是礦區水平應力得到較大程度的釋放,特彆是東北耑,使得礦區公路和粉礦堆場處深部巖體開始形成彎麯摺斷麵,目前進入沿著高陡傾角的拉張裂縫嚮採空區的傾倒滑移破壞階段,地錶巖體以快速變形為主,而運輸隧道東南耑處的深部巖體隻是髮生彎麯變形,地錶巖體在經歷較短時間的快速變形之後,又線性穩定增長,進入傾倒破壞階段。其成果能為其他類似的金屬礦山工程提供可藉鑒的規律。
이호북악주정조철광서구위례,의거근6 a적지표수평위이、침강위이변형감측성과,대지하개채인기적지표변형규률진행분석。결과표명:정조철광서구종지표탑함지금,등치선、이동선화함락선재광구동북단확전최다,병차재2010년1월,설치적관잡문지조시정왕서약150 m적광구공로(이하간칭광구공로)、분광퇴장급운수수도동남단처적지표암체돌연가속,구기원인시광구수평응력득도교대정도적석방,특별시동북단,사득광구공로화분광퇴장처심부암체개시형성만곡절단면,목전진입연착고두경각적랍장렬봉향채공구적경도활이파배계단,지표암체이쾌속변형위주,이운수수도동남단처적심부암체지시발생만곡변형,지표암체재경력교단시간적쾌속변형지후,우선성은정증장,진입경도파배계단。기성과능위기타유사적금속광산공정제공가차감적규률。
The measured data of the surface deformation including the horizontal and vertical displacements in the west part of Chengchao iron mine over the period of 6 years were collected and analyzed. The contours,moving line and collapsing line were expanded the most in the northeast area of the iron mine from the initial time of surface subsidence up to now. In January 2010,the displacements of rock mass at a road in mining area,at the surface of the fines yard and at the surface in the southeast of the transportation tunnel were found to accelerate. The reason was that horizontal stress in mines was greatly released,especially in the northeast of the mine. In the mine road and fines yard,bending fracture plane was formed in deep rock mass,and now it entered the stage of toppling-sliding to golf along the high and steep dip angle of tension cracks,with the surface deformation increasing rapidly,while in southeast area of transport tunnel,only certain bedding deformation occurred in deep rock mass. After a shorter but rapid phase of increasing,the deformation became increasing linearly and steadily, and the rock mass there is entering into a stage of toppling failure. The research results may be applied to the similar metal mines for reference.