急倾斜单一厚煤层采后下部自保护范围的研究 渗透特性的影响

急倾斜单一突出厚煤层一般采用水平分层或斜切分层进行开采,其区域防突措施确定的关键在于确定其采动影响下的自保护范围.以湖南省南阳庙煤矿为例,进行了回采工作面煤的工业分析和采后瓦斯残余参数观测,UDEC数值模拟和实验室相关数据测试等一系列研究,研究表明：在采用水平分层或斜切分层采煤法开采后,其分层相当于保护层的开采,下部1~2个分层均处于被保护层的保护范围之内,大大简化了防突工程.研究结果可为急倾斜突出煤层区域防突措施的制定提供理论依据,对急倾斜突出煤层的安全生产具有一定的理论意义和实际意义.

Study on the Self-protection Scope of the Lower PartAfter Mining in Steeply and Single Coal Seams permeability of shale

For the mining of the steeply inclined single thick coal seam, the horizontal stratification or beveled stratification is usually used, and the determination of the self-protective range under the influence of mining is the key to determine the measures of the regional outburst prevention. Taking Nanyangmiao Coal Mine in Hunan Province as an example, a number of studies, such as the industrial analysis of coal mining face and the observation of residual gas parameters, UDEC numerical simulation and data test, were carried out. The experiment results show that the stratification is equivalent to the exploitation of the protective layer after used horizontal stratification or beveled stratification method, and the lower part 1-2 layers are protected within the protected zone, which greatly simplifies outburst prevention engineering. The results provide a theoretical basis for the development of outburst prevention measures in steeply inclined coal seam, and it is of great practical significance for the safe production of the steeply inclined coal seam.