【摘要】：分析了登封礦區(qū)瓦斯賦存構(gòu)造逐級控制特征和瓦斯地質(zhì)規(guī)律,論證了蹬槽礦保護層開采條件。在礦山壓力相關(guān)理論、巖石破壞過程分析和含瓦斯煤巖滲流—應力—損傷耦合的基礎(chǔ)上,研究了中距離上保護層開采過程中頂?shù)装鍘r層變形破壞、裂隙產(chǎn)生發(fā)育擴展演化規(guī)律,以及瓦斯解吸釋放運移過程,提煉了采動巖體破裂效果中的裂隙場演化特征,并進行力學機理分析。被保護層的卸壓膨脹會產(chǎn)生大量離層裂隙與穿層裂隙,被保護層瓦斯卸壓解吸,在瓦斯壓力梯度的驅(qū)動下,通過裂隙通道涌入到采空區(qū)或保護層,消除被保護層的突出危險性。煤巖力學特性包括彈性模量、內(nèi)摩擦角和抗拉強度和流變特性會影響到煤巖破裂及巖層移動過程。研究采動巖體損傷-變形-破壞的熱效應,揭示巖體力學性能與熱效應變化的關(guān)系。明確了在保護層掘進、回采時煤層底板膨脹區(qū)與壓縮區(qū)交界處容易誘發(fā)突出危險。制定了探層間距與探構(gòu)造措施,并對掘進過程中不同時期的瓦斯來源進行了現(xiàn)場實測與分析,提出了分源瓦斯治理方案,實現(xiàn)了中距離保護層的安全快速掘進。
[Abstract]:The gas occurrence structure and gas geology law in Dengfeng mining area are analyzed, and the mining conditions of protective layer in Dengfeng mine are demonstrated. Based on the relevant theory of mine pressure, the analysis of rock failure process and the seepage-stress-damage coupling of gas-bearing coal and rock, the deformation and failure of roof and floor strata and the development and evolution of cracks in the middle distance upper protective layer mining process are studied. The evolution characteristics of fracture field in the fracture effect of mining rock mass are extracted and the mechanical mechanism is analyzed. The unloading and expansion of the protected layer will produce a large number of off-layer cracks and cross-layer cracks, which will be released by gas unloading and desorption in the protective layer. Driven by the gas pressure gradient, the protected layer will be flooded into the goaf or protective layer through the crack channel to eliminate the outburst danger of the protected layer. The mechanical properties of coal and rock, including elastic modulus, internal friction angle, tensile strength and rheological properties, will affect the process of coal-rock fracture and rock movement. The thermal effect of damage-deformation-failure of mining rock mass is studied and the relationship between mechanical properties of rock mass and the change of thermal effect is revealed. It is clear that it is easy to induce outburst danger at the boundary between expansion area and compression area of coal seam floor during excavation and mining in protective layer. The spacing of exploration layers and the structural measures of exploration are formulated, and the field measurement and analysis of gas sources in different periods in the process of tunneling are carried out, and the control scheme of separate sources of gas is put forward, which realizes the safe and rapid excavation of medium distance protective layer.
【學位授予單位】：中國礦業(yè)大學（北京）
【學位級別】：博士
【學位授予年份】：2013
【分類號】：TD712

【參考文獻】

相關(guān)期刊論文 前10條

1 任強;劉偉韜;;覆巖采動裂隙帶發(fā)育規(guī)律的數(shù)值模擬分析[J];安全與環(huán)境學報;2006年S1期

2 郭德勇,韓德馨,王新義;煤與瓦斯突出的構(gòu)造物理環(huán)境及其應用[J];北京科技大學學報;2002年06期

3 馬瑾;劉力強;劉培洵;馬勝利;;斷層失穩(wěn)錯動熱場前兆模式:雁列斷層的實驗研究[J];地球物理學報;2007年04期

4 聶百勝,何學秋,王恩元;瓦斯氣體在煤孔隙中的擴散模式[J];礦業(yè)安全與環(huán)保;2000年05期

5 劉林;;開采保護層保護效果及范圍的數(shù)值模擬研究[J];礦業(yè)安全與環(huán)保;2005年06期

6 余海龍,尹光志,鮮學福;俯偽斜采煤法防治急斜煤層煤與瓦斯突出的研究[J];重慶大學學報(自然科學版);1999年03期

7 程遠平,俞啟香,袁亮;上覆遠程卸壓巖體移動特性與瓦斯抽采技術(shù)[J];遼寧工程技術(shù)大學學報;2003年04期

8 隋旺華;開采覆巖破壞工程地質(zhì)預測的理論與實踐[J];工程地質(zhì)學報;1994年02期

9 謝和平;錢鳴高;彭蘇萍;胡省三;成玉琪;周宏偉;;煤炭科學產(chǎn)能及發(fā)展戰(zhàn)略初探[J];中國工程科學;2011年06期

10 傅雪海,秦勇,張萬紅;高煤級煤基質(zhì)力學效應與煤儲層滲透率耦合關(guān)系分析[J];高校地質(zhì)學報;2003年03期

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