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  本文選題：離層注漿充填 + 關(guān)鍵層　； 參考：《西安科技大學(xué)》2017年碩士論文

【摘要】：為了安全開采“三下”煤炭,減少地面沉陷,保護礦區(qū)環(huán)境,多年來國內(nèi)外采用了多種不同的開采技術(shù)措施,其中,條帶開采與采空區(qū)水砂充填和矸石風(fēng)力充填最為常用、有效。離層注漿充填是一種控制地表沉陷的新技術(shù),該技術(shù)是通過地面布置鉆孔向在巖移過程中覆巖內(nèi)部形成的離層空洞充填進外來材料來對上覆巖層起到支撐作用,從而降低覆巖向地面的移動變形速度和地表下沉量。離層注漿充填技術(shù)的充填區(qū)域在采空區(qū)上覆巖層間充填而不同于采空區(qū)內(nèi)充填,因此離層注漿充填工作不會影響井下工作面正常生產(chǎn)。但是,目前對于覆巖離層注漿沉陷控制原理還有待進一步研究,且國內(nèi)針對覆巖離層注漿控制地面沉陷的工程實例也較少。為此,論文采用理論分析、實驗?zāi)M和現(xiàn)場應(yīng)用相結(jié)合的手段,對覆巖離層注漿充填減沉機制開展研究。論文選取淮北礦區(qū)祁南煤礦某首采工作面作為研究對象,該工作面上方村莊位于煤層切眼一側(cè),屬于“切眼側(cè)局部壓煤”,注漿充填控制寬度和注漿終止時段與已往有所不同,該工面煤層采高3.5m,對于注采匹配的控制極為苛刻,上述典型特點在淮北礦區(qū)尚屬首次。論文首先從理論上對采動覆巖離層發(fā)育和充填層位進行研究,然后,基于相似材料物理實驗和數(shù)值模擬相結(jié)合的手段對覆巖離層注漿充填過程進行模擬,分析總結(jié)覆巖離層注漿對地表沉降的控制機制。最后,采用理論、實驗、工程三者相結(jié)合的手段,對地表減沉效果進行評價。實施覆巖離層注漿充填后,注漿充填減沉率達(dá)96%,通過現(xiàn)場實測地表水平變形值最大僅為0.5mm/m,遠(yuǎn)低于“三下”采煤規(guī)程中規(guī)定的Ⅰ級損壞水平變形臨界值2.0mm/m,地表建(構(gòu))筑物沒有造成任何破壞,達(dá)到了安全采煤目的,取得了顯著的技術(shù)、經(jīng)濟與社會效益。
[Abstract]:In order to safely mine "three down" coal, reduce the ground subsidence and protect the environment of mining area, many kinds of mining technology measures have been adopted at home and abroad for many years. Among them, strip mining and goaf water sand filling and gangue wind filling are the most commonly used. Effective. The grouting filling is a new technique to control the surface subsidence. The technique is to support the overlying strata by placing boreholes on the ground and filling the cavity in the overburden to foreign materials during the course of the rock movement. Thus, the velocity of the overburden moving to the ground and the amount of subsidence are reduced. The filling area of separated layer grouting filling technology is different from that of goaf filling in the overlying strata filling in goaf, so the grouting filling work in separated layer will not affect the normal production of underground working face. However, at present, the control principle of grouting subsidence in overlying strata is still to be further studied, and there are few examples in China for controlling surface subsidence by grouting in overburden strata. In this paper, theoretical analysis, experimental simulation and field application are used to study the mechanism of grouting and reducing subsidence. In this paper, a first mining face of Qinan Coal Mine in Huaibei Mining area is selected as the research object. The village above the face is located on the side of coal seam cutting, which belongs to "cut side local pressing coal". The control width of grouting filling and grouting termination period are different from those of the past. The mining height of this coal seam is 3.5 m and the control of injection and mining matching is extremely harsh. The above typical characteristics are for the first time in Huaibei mining area. In this paper, the development and filling position of strata separated from mining overburden are studied theoretically, and then the grouting filling process of separated strata of overburden is simulated based on the physical experiments of similar materials and numerical simulation. This paper analyzes and summarizes the mechanism of controlling surface subsidence by grouting in separated strata of overburden. Finally, the surface subsidence reduction effect is evaluated by the combination of theory, experiment and engineering. After grouting and filling in separated strata of overburden, The grouting filling reduces the subsidence rate to 96, and the maximum horizontal deformation value of the surface measured in the field is only 0.5 mm / m, which is far below the critical value of the horizontal deformation of grade I damage specified in the "Sanxia" coal mining regulations, and the surface building (construction) does not cause any damage. To achieve the goal of safe coal mining, achieved remarkable technical, economic and social benefits.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD327

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本文編號：1789192