本文關鍵詞： 綜放工作面 沿空留巷 厚層直接頂 巷內(nèi)支護 巷旁支護　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】：本文以葛泉礦1198工作面厚層直接頂條件下綜放沿空留巷為工程背景,綜合運用理論分析、數(shù)值模擬、現(xiàn)場試驗等方法,從分析圍巖結構特征著手,建立了厚層直接頂條件下綜放沿空留巷基本頂?shù)钠茢嗔W模型,分析了圍巖結構穩(wěn)定的影響因素,系統(tǒng)研究了綜放工作面沿空留巷圍巖控制技術,主要研究成果如下:(1)與薄及中厚煤層的沿空留巷相比,綜放沿空留巷具有頂板為煤體、一次采出煤層厚度大、頂板形成的結構遠離采場、圍巖穩(wěn)定時間長的特點,導致圍巖穩(wěn)定性降低、圍巖控制難度大。在厚層直接頂條件下,采空區(qū)冒落的矸石能夠充滿采空區(qū),基本頂破斷后形成“斜跨梁”結構能夠保持較好的穩(wěn)定性。(2)得到了厚層直接頂條件下頂煤的厚度與剛度、直接頂?shù)暮穸扰c剛度、充填體的位置、寬度及強度和端頭不放頂煤長度等因素對綜放沿空留巷圍巖應力分布與變形特征的影響規(guī)律,為綜放沿空留巷圍巖控制提供了依據(jù)。(3)分析了綜放沿空留巷圍巖應力分布和變形破壞特征,提出了采用高強度、高預緊力錨桿(索)保持頂煤和實煤體穩(wěn)定及加強充填體抗變形能力的圍巖控制技術。(4)在1198工作面成功進行了工業(yè)性試驗。通過現(xiàn)場監(jiān)測數(shù)據(jù)表明:留巷后巷道圍巖及巷旁充填體結構基本穩(wěn)定,滿足使用要求,驗證了本論文研究成果的正確性和可靠性。
[Abstract]:In this paper, based on the engineering background of retaining roadway along the goaf of fully mechanized caving caving under the condition of direct thick layer in 1198 face of Gequan Coal Mine, the structural characteristics of surrounding rock are analyzed by using the methods of theoretical analysis, numerical simulation and field test, etc. In this paper, the breaking mechanics model of the basic roof of the roadway left along the gob of fully mechanized caving caving under the condition of the direct roof of thick layer is established, and the factors influencing the stability of the surrounding rock structure are analyzed. The main research results are as follows: (1) compared with the roadway along the gob of thin and medium thick coal seam, Fully-mechanized caving roadway along goaf has the characteristics of coal roof, large thickness of coal seam, structure of roof formation far from stope, and long time of stability of surrounding rock. The stability of surrounding rock is reduced, and the control of surrounding rock is very difficult. Under the condition of direct roof of thick layer, the gangue falling out of goaf can fill the goaf. The thickness and stiffness of the top coal, the thickness and stiffness of the direct roof, the position of the filling body, the thickness and stiffness of the top coal under the condition of the direct roof of thick layer can be obtained by the formation of "oblique span beam" structure after the basic jacking break. The influence of width, strength and length of uncaving coal on the stress distribution and deformation characteristics of surrounding rock along goaf in fully mechanized caving caving. This paper provides a basis for the control of surrounding rock along gob in fully-mechanized caving caving, analyzes the stress distribution and deformation-failure characteristics of surrounding rock along goaf retaining roadway in fully-mechanized caving caving, and puts forward the application of high strength. The control technology of surrounding rock with high pretension anchor (cable) to maintain the stability of top coal and solid coal body and to strengthen the anti-deformation ability of backfill was successfully carried out in 1198 face. The field monitoring data showed that the roadway after retaining roadway was successfully tested. The structure of surrounding rock and roadway filling body is basically stable, The correctness and reliability of the research results are verified.
【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】：TD353

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本文編號：1503056