煤矿开采
煤礦開採
매광개채
Coal Mining Technology
2015年
5期
57-61
,共5页
充填开采%模拟实验%数值计算%围岩应力%地表移动
充填開採%模擬實驗%數值計算%圍巖應力%地錶移動
충전개채%모의실험%수치계산%위암응력%지표이동
stowing mining%simulation experiment%numerical simulation%surrounding rock stress%surface movement
以某煤矿2307充填开采工作面为原型,采用相似模拟与数值模拟相结合的方法,建立地质力学模型,模拟分析了开采充填过程中围岩、地表的力学演化规律和移动变形过程。研究表明：充填开采可有效控制覆岩破坏和地表变形,顶板出现离层裂隙,但未垮落,最大下沉滞后工作面约58．5m；开采过程中围岩应力释放,顶板出现拉伸,采空区前后端及底板出现应力集中,为开采前的1．47~1．78倍,充填工作面周期来压不明显；开挖后地面下沉值为212．7mm,下沉系数为0．06,地面水平变形和倾斜变形形态与垮落法管理顶板曲线形态相似,量值较小。
以某煤礦2307充填開採工作麵為原型,採用相似模擬與數值模擬相結閤的方法,建立地質力學模型,模擬分析瞭開採充填過程中圍巖、地錶的力學縯化規律和移動變形過程。研究錶明：充填開採可有效控製覆巖破壞和地錶變形,頂闆齣現離層裂隙,但未垮落,最大下沉滯後工作麵約58．5m；開採過程中圍巖應力釋放,頂闆齣現拉伸,採空區前後耑及底闆齣現應力集中,為開採前的1．47~1．78倍,充填工作麵週期來壓不明顯；開挖後地麵下沉值為212．7mm,下沉繫數為0．06,地麵水平變形和傾斜變形形態與垮落法管理頂闆麯線形態相似,量值較小。
이모매광2307충전개채공작면위원형,채용상사모의여수치모의상결합적방법,건입지질역학모형,모의분석료개채충전과정중위암、지표적역학연화규률화이동변형과정。연구표명：충전개채가유효공제복암파배화지표변형,정판출현리층렬극,단미과락,최대하침체후공작면약58．5m；개채과정중위암응력석방,정판출현랍신,채공구전후단급저판출현응력집중,위개채전적1．47~1．78배,충전공작면주기래압불명현；개알후지면하침치위212．7mm,하침계수위0．06,지면수평변형화경사변형형태여과락법관리정판곡선형태상사,량치교소。
Applying analogue simulation and numerical simulation, the mechanics variation and movement and deformation in stowing mining 2307 face was analyzed. Results showed that stowing mining could effectively control overlying strata failure and surface deforma-tion, and that separation and fissure occurred but roof was not cave. Maximum subsidence was 58. 5m behind of mining face. In min-ing, surrounding rock stress releasing made roof tensed. Stress concentration occurred at front and rear of gob, and floor which reached 1. 47-1. 78 times of original stress. Periodical weighting was inconspicuous. Surface subsidence value was 212. 7mm after mining and subsidence ratio was 0. 06. Surface horizontal deformation and tilt deformation curve was similar with that of roof-caving method, but deformation value was small.
