本文選題：地表塌陷 + 巖溶溶洞　； 參考：《煤炭科學(xué)技術(shù)》2017年01期

【摘要】：為了研究曲江煤礦地表塌陷機(jī)理和原因,基于本區(qū)地表塌陷時(shí)空特征、地質(zhì)勘探結(jié)果、年降水量季節(jié)變化規(guī)律、地震記錄數(shù)據(jù)、煤礦開采條件等資料,對該礦9處地表塌陷成因與地下孔洞、降水量、地震、開采等因素進(jìn)行了時(shí)間與空間關(guān)系分析。研究表明:地表塌陷周邊存在土洞,且埋深與相對塌陷距離多數(shù)在20 m以內(nèi),淺部存在孔洞和蓋層薄是地表塌陷的本質(zhì)內(nèi)因;每年3月水位最低,4—6月降水量最多,共發(fā)生塌陷7處,地下水位下降和雨季蓋層弱化是地表塌陷的直接外因;塌陷發(fā)生時(shí)間(除1號(hào)塌陷)與地震發(fā)生時(shí)間前后間隔均在3個(gè)月之內(nèi),地震是地表塌陷的誘發(fā)外因;井下開采與地表塌陷的相關(guān)性不明顯,但對地表塌陷位置存在采動(dòng)影響。
[Abstract]:In order to study the mechanism and cause of surface collapse in Qujiang coal mine, based on the spatial and temporal characteristics of surface collapse in this area, geological exploration results, seasonal variation of annual precipitation, seismic record data, mining conditions of coal mine, etc. The relationship between time and space of 9 ground subsidence causes, underground holes, precipitation, earthquakes, mining and so on has been analyzed in this paper. The results show that there are soil holes around the surface collapse, and the distance between the depth of burial and the relative collapse is less than 20 m, the existence of holes and thin caprocks in the shallow part is the essential internal cause of the surface collapse, and the precipitation of the lowest water level in March is the highest in April-June of each year. The downfall of groundwater level and the weakening of the cover in the rainy season are the direct external causes of the surface collapse, and the time between the collapse (except the No. 1 collapse) and the time before and after the earthquake are within 3 months, and the earthquake is the induced external cause of the surface collapse. The correlation between underground mining and surface subsidence is not obvious, but there is a mining effect on surface collapse position.
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本文編號(hào)：1960164