發(fā)布時間：2018-03-22 11:05

  本文選題：導水裂隙帶　切入點：地表河流　出處：《中國礦業(yè)大學》2015年碩士論文　論文類型：學位論文

【摘要】：我國許多煤礦開采受到水體威脅,防治水已是煤礦生產(chǎn)中的一大難題。山西、陜西和內(nèi)蒙古西部是我國重要的大型煤炭基地,該地區(qū)煤層厚、埋藏淺,地質(zhì)條件優(yōu)越,但是淺埋厚煤層開采也對預防地表水體的威脅提出了新挑戰(zhàn)。色連煤礦位于內(nèi)蒙古鄂爾多斯地區(qū)東勝煤田的中北部,礦井一次采全高開采多層淺埋煤層,煤層厚度變化起伏大,地表河流、溝谷密布。本文以色連煤礦河床下多煤層開采為研究對象,對其覆巖導水裂隙帶與地表河流的導通性進行了研究,取得以下主要成果:(1)結(jié)合礦井地質(zhì)采礦條件,利用井下仰空雙端封堵注水側(cè)漏裝置和巖層鉆孔探測儀,觀測2-2上煤覆巖在充分采動狀態(tài)的導水裂隙帶高度,得出導水裂隙帶最大高度為82m,裂采比為20.5,采動裂隙發(fā)育程度高。(2)以2-2上煤和2-2中煤為原型,進行了相似模擬試驗和數(shù)值模擬計算,研究覆巖在重復采動下的變形破壞特征。其中,相似模擬試驗結(jié)果表明:2-2上煤開挖后,最大裂隙帶高度為78m,裂采比為19.5;2-2中煤開挖后,導水裂隙帶高度二次發(fā)育,最終高度為95m;數(shù)值模擬計算結(jié)果表明:開挖2-2上煤后,裂隙帶在采空區(qū)兩側(cè)發(fā)育最高,約為88m,采裂比22;開挖2-2中煤后,導水裂隙帶高度發(fā)育至108m左右。(3)利用matlab軟件對導水裂隙帶與地表河床的導通性進行了分析,評價了各煤層回采的安全性。針對潛在危險區(qū)域,提出了兩種安全技術(shù)措施,即限厚開采、非膠結(jié)膏體充填,并以2-2上煤為例,分析得出了非膠結(jié)膏體的充填高度、及限厚開采的采高。本文的研究成果,不僅對色連煤礦河床下淺埋多煤層的安全開采具有現(xiàn)實意義,同時也對其它類似礦井解放水體下壓煤有一定借鑒作用。
[Abstract]:Many coal mines in China are threatened by water bodies, and water control has become a major problem in coal production. Shanxi, Shaanxi and the western part of Inner Mongolia are important large coal bases in China, where coal seams are thick, shallow buried and have superior geological conditions. However, the mining of shallow thick coal seam also poses a new challenge to prevent the threat of surface water body. Selian Coal Mine is located in the central and northern part of Dongsheng coalfield in Ordos area, Inner Mongolia. The surface rivers and gullies are densely distributed. In this paper, taking the mining of multiple coal seams under the riverbed of Xilian coal mine as the research object, the conductivity of the overburden water conduction fissure zone and the surface river is studied, and the following main achievements are obtained: 1) combined with the mining conditions of mine geology. The height of water-conducting fissure zone of 2-2 coal overburden rock in full mining state is observed by using downhole double end plugging water injection side leakage device and rock stratum drilling detector. It is concluded that the maximum height of water-conducting fissure zone is 82 m, the ratio of fracture to production is 20.5, and the development degree of mining fissures is high.) taking 2-2 coal and 2-2 medium coal as the prototypes, similar simulation tests and numerical simulation calculations are carried out. The characteristics of deformation and failure of overburden rock under repeated mining are studied. The results of similar simulation test show that the maximum height of fracture zone is 78 m, the ratio of crack to mining is 19.5 ~ 2 ~ 2 after coal excavation, and the height of water-conducting fracture zone is developed twice after the excavation of the upper coal, the maximum fracture zone height is 78 m, and the ratio of crack to mining is 19.5 ~ 2-2. The final height is 95 m. The numerical simulation results show that the fracture zone has the highest development on both sides of the goaf, about 88 m, the ratio of mining crack is 22, and after the excavation of 2-2 coal, the fracture zone is the highest. This paper analyzes the conductivity of the aqueduct fissure zone and the surface riverbed by using matlab software, evaluates the safety of each coal seam recovery, and puts forward two kinds of safety technical measures in view of the potential danger area. The filling height of the non-cemented paste and the mining height of the limited thickness mining are analyzed and obtained by taking 2-2 coal as an example. It is not only of practical significance for the safe mining of shallow and multi-coal seams under the riverbed of Xelian coal mine, but also useful for other similar coal mines to liberate the water body under pressure coal.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD823.83

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