张集矿11-2煤底板穿层钻孔预抽瓦斯技术研究
发布时间：2018-11-18 13:55
【摘要】：瓦斯灾害是煤矿安全生产过程中的主要灾害,严重威胁着煤矿工人的生命安全。本文在理论研究的基础上,主要通过对煤与瓦斯突出机理、钻孔周围煤体瓦斯流动规律、穿层钻孔预抽瓦斯技术等理论知识的学习,结合张集煤矿11-2煤层现场试验,验证穿层钻孔预抽瓦斯的抽采效果。 以淮南矿业集团张集煤矿11-2煤层为试验对象,测定了其瓦斯基础参数：煤层原始瓦斯最大压力为2.14MPa,瓦斯含量为11.42m3/t；通过三个月抽采观察,煤层瓦斯抽采的半径为3.76m。并根据抽采半径分析了钻孔合理布置方案,使抽采瓦斯煤层中不存在空白带,得出了穿层钻孔合理间距的计算公式。在此基础上,在1123(1)底抽巷进行预抽瓦斯后煤层残余瓦斯压力和残余瓦斯含量测定试验,测定结果为：残余瓦斯压力为0.6MPa、残余瓦斯含量为4.205m3/t。通过前后瓦斯压力和瓦斯含量的对比,以及预抽后残余瓦斯压力和残余瓦斯含量与突出临界值的对比,说明穿层钻孔预抽瓦斯技术可以取得消突的效果。
[Abstract]:Gas disaster is the main disaster in the process of coal mine safety production, which seriously threatens the safety of coal miners. On the basis of theoretical research, this paper mainly through the study of coal and gas outburst mechanism, coal body gas flow law around borehole, pre-drainage technology of drilling hole, combined with the field test of coal seam 11-2 in Zhangji coal mine. Verify the effect of gas drainage by drilling hole. Taking the 11-2 coal seam of Zhangji Coal Mine of Huainan Mining Group as the experimental object, the basic gas parameters of the coal seam are determined: the maximum gas pressure of the coal seam is 2.14 MPA, and the gas content is 11.42 m3 / t; The radius of coal seam gas drainage is 3.76 m. According to the drawing radius, the reasonable arrangement scheme of borehole is analyzed, so that there is no blank zone in the coal seam of gas drainage, and the formula for calculating the reasonable interval between boreholes in the coal seam is obtained. On this basis, the residual gas pressure and residual gas content in coal seam after pre-drainage are tested in 1123 (1) bottom drainage roadway. The results are as follows: the residual gas pressure is 0.6 MPA, and the residual gas content is 4.205 m3 / t. Through the comparison of gas pressure and gas content before and after pre-drainage and the comparison between residual gas pressure and residual gas content after pre-drainage and the critical value of outburst, it is shown that pre-drainage technology can achieve the effect of outburst suppression.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD712.6
本文编号：2340219
[Abstract]:Gas disaster is the main disaster in the process of coal mine safety production, which seriously threatens the safety of coal miners. On the basis of theoretical research, this paper mainly through the study of coal and gas outburst mechanism, coal body gas flow law around borehole, pre-drainage technology of drilling hole, combined with the field test of coal seam 11-2 in Zhangji coal mine. Verify the effect of gas drainage by drilling hole. Taking the 11-2 coal seam of Zhangji Coal Mine of Huainan Mining Group as the experimental object, the basic gas parameters of the coal seam are determined: the maximum gas pressure of the coal seam is 2.14 MPA, and the gas content is 11.42 m3 / t; The radius of coal seam gas drainage is 3.76 m. According to the drawing radius, the reasonable arrangement scheme of borehole is analyzed, so that there is no blank zone in the coal seam of gas drainage, and the formula for calculating the reasonable interval between boreholes in the coal seam is obtained. On this basis, the residual gas pressure and residual gas content in coal seam after pre-drainage are tested in 1123 (1) bottom drainage roadway. The results are as follows: the residual gas pressure is 0.6 MPA, and the residual gas content is 4.205 m3 / t. Through the comparison of gas pressure and gas content before and after pre-drainage and the comparison between residual gas pressure and residual gas content after pre-drainage and the critical value of outburst, it is shown that pre-drainage technology can achieve the effect of outburst suppression.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD712.6
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