岱庄煤矿下组煤承压水上膏体充填开采安全性研究

发布时间：2018-06-06 19:04

本文选题：承压水 + 膏体充填　；参考：《中国矿业大学》2017年硕士论文

【摘要】：我国煤炭行业中的群死群伤特大事故主要由瓦斯突出和突水灾害造成,各类突水事故给煤炭企业带来的人员伤亡和经济损失极为惨重,其中承压水上开采一直是我国煤炭开采的重点也是难点。近年来,随着特殊开采技术的发展,膏体充填开采作为一种安全高效的绿色采煤方法得到大力推广应用,该技术可以实现“三下一上”压煤的安全开采。本文以岱庄煤矿承压水上煤层的开采为研究对象,针对含水层水压较高的特点,提出膏体充填开采的技术方案,通过理论分析、数值模拟及现场实测等方法分析了充填开采的煤层底板破坏规律,确定了充填材料配比在内的膏体充填开采工艺参数,取得以下主要成果:(1)理论计算得出垮落法开采后11605工作面底板最大破坏深度为11.7 m,十三灰和奥灰含水层对底板的突水系数全部大于0.1 MPa/m,突水危险性高。(2)膏体充填开采建立底板隔水层梁式模型,依据数值模拟中充填开采底板破坏深度4~9 m,可以确定承压水上安全开采的充填方案:充填体强度为2 MPa,充填步距为3.6 m。(3)利用PLS模型设计充填材料配比,满足充填体强度要求并能降低充填成本,钻孔注水试验验证了膏体充填开采可以减小底板破坏深度,实现承压水上煤层的安全开采。本文的研究成果,不仅对岱庄煤矿下组煤承压水上的安全开采具有现实意义,同时也对其它类似矿井开采承压水上煤层有一定借鉴作用。
[Abstract]:The major accidents in coal industry in China are mainly caused by gas outburst and water inrush. All kinds of water inrush accidents bring heavy casualties and economic losses to coal enterprises. Pressure-bearing water mining has always been the focus of coal mining in China is also a difficult point. In recent years, with the development of special mining technology, paste filling mining, as a safe and efficient green coal mining method, has been popularized and applied. Aiming at the characteristics of high water pressure of aquifer, the technical scheme of paste filling mining is put forward in this paper, which is based on theoretical analysis, taking the mining of coal seams under pressure in Daizhuang coal mine as the research object, and aiming at the characteristics of high water pressure of aquifer. The failure law of coal seam floor in filling mining is analyzed by numerical simulation and field measurement, and the technological parameters of paste filling mining, including the proportion of filling material, are determined. The main results are as follows: 1) theoretical calculation shows that the maximum failure depth of floor in 11605 working face after caving mining is 11.7 m, the water inrush coefficient of 13 ash and Ordovician aquifer is all greater than 0.1 MPA / m, and the risk of water inrush is high. In mining, the beam model of the bottom plate water isolation layer is established, According to the failure depth of backfill mining floor in numerical simulation, the filling scheme of safe mining on confined water can be determined: the filling body strength is 2 MPa, the filling step distance is 3.6 m 路m ~ (3) the filling material ratio is designed by PLS model. To meet the requirements of backfill strength and reduce the filling cost, the borehole water injection test proved that paste filling mining can reduce the depth of floor damage and realize the safe mining of coal seams on pressurized water. The research results of this paper not only have practical significance for safe mining of coal bearing water in Dazhuang coal mine, but also can be used for reference in other similar mines.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD823.7

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