本文選題：山地煤層　切入點：賦存分類體系　出處：《貴州大學》2015年碩士論文

【摘要】：我國西南山區(qū)的特定地理位置和錯綜復雜的地形地貌,造就了地表多為起伏變化較大的山地。采場頂板由于受載不均勻、煤層埋深變化強烈,導致山地煤層開采時的礦壓顯現(xiàn)及頂板運動出現(xiàn)了新特征,對礦井安全高效開采造成了不利影響。本文以安順煤礦典型采場9100工作面為基礎研究對象,綜合運用現(xiàn)場調(diào)研與實測、數(shù)值模擬與理論分析等研究手段,對山地賦存條件下的采場礦壓顯現(xiàn)規(guī)律及頂板運動特征進行了系統(tǒng)研究,主要研究成果如下:(1)基于大量實地調(diào)研與文獻參考,建立了山地煤層賦存分類體系,為指導不同賦存條件下的采場礦壓研究提供了工作基礎。依據(jù)安順煤礦9100工作面礦壓現(xiàn)場實測結果和數(shù)值模擬結果,對采場礦壓顯現(xiàn)、頂板運動特征、坡體活動與開采沉陷特征進行了研究,得出了頂板破斷過程的四個階段。(2)通過建立多組數(shù)值模型,分析了頂板運動的影響因素及影響規(guī)律,辨證研究了煤層厚度、煤層埋深、坡體角度與覆巖運動結構的關系,得出煤層厚度、煤層埋深是影響頂板運動結構形成與轉(zhuǎn)變方式的主要因素。(3)運用礦壓基礎研究理論與力學理論,分析了頂板受力類型、基本頂初次斷裂受力狀態(tài),推導出了基本頂初次斷裂步距。根據(jù)結構力學與材料力學,建立了基本頂初次來壓和周期來壓的結構力學模型,并進行了結構受力分析。(4)根據(jù)現(xiàn)有研究成果,按“給定變形”與“限定變形”方案分析了支架與圍巖的相互作用關系。采用不同支護強度計算方案,得出了合理有效的支護工作阻力。
[Abstract]:The special geographical location and complicated terrain and landform in the mountainous area of southwest China have made the surface of the earth's surface more undulating and changed greatly. The roof of the stope has a strong change in the depth of the coal seam because of the uneven loading of the roof. As a result of the new characteristics of mine pressure and roof movement during mining in mountainous coal seam, this paper takes 9100 face of typical stope of Anshun Coal Mine as the basic research object, which has a negative effect on mine safe and efficient mining. By means of field investigation and measurement, numerical simulation and theoretical analysis, this paper makes a systematic study on the characteristics of stope pressure and roof movement under the condition of mountain occurrence. The main research results are as follows: (1) based on a large number of field investigations and literature references, a classification system for the occurrence of coal seams in mountainous areas has been established. In order to guide the study of stope pressure under different existing conditions, this paper provides the working basis for the study of stope pressure. According to the measured results and numerical simulation results of mine pressure in 9100 face of Anshun Coal Mine, the characteristics of stope pressure and roof movement are analyzed. The characteristics of slope movement and mining subsidence are studied, and the four stages of roof breaking are obtained. Through the establishment of multi-group numerical models, the influencing factors and law of roof movement are analyzed, and the thickness of coal seam and the depth of coal seam are dialectically studied. Based on the relationship between slope angle and overburden movement structure, it is concluded that the thickness of coal seam and the depth of coal seam are the main factors influencing the formation and transformation of roof motion structure. According to the structural mechanics and material mechanics, the structural mechanics models of the primary pressure and the periodic pressure of the basic top are established according to the stress state of the primary fracture of the basic top, and the distance of the first fracture of the basic top is deduced. According to the existing research results, according to the "given deformation" and "limited deformation" scheme, the interaction relationship between support and surrounding rock is analyzed. Different support strength calculation schemes are adopted. The reasonable and effective support resistance is obtained.
【學位授予單位】：貴州大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD325

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