九里山井田构造煤空间展布特征与成因分析

Tectonic Coal Space Distribution Features and Formation Analysis of Jiulishan Coalfield

为了有效防治九里山煤矿瓦斯动力灾害,并为该矿煤层气开发地面钻井规划布置提供依据,基于构造煤是漫长年代地质条件下改造作用的产物,在对九里山矿井大量现场资料调查的基础上,结合煤田成煤环境和地质构造特征,根据井田已揭露的构造煤的分布特点,研究了井田构造煤空间展布特征及厚度变化规律,提出底板北西向隆起、顶板揉皱以及局部小断层是造成目前构造煤空间展布及厚度变化的主要原因,并对其形成机制进行了研究和分析,分析表明:九里山构造煤主要是在后期构造应力作用下,煤层在其顶底板之间发生塑性形变的结果。

In order to certainly prevent and control the coal mine gas dynamic disasters and to provide the basis to the plan and layout of the surface drilling for the coal bed methane development, based on the tectonic coal was the products of reconstruction under the long year geological conditions and based on the great site information investigation of the Jiulishan Mine, in combination with the coalfield coal formation environment and geological tectonic features, with the exposed tectonic coal distribution features of the coalfield, the paper studied the structure coal space distribution features and thickness variation law of the coalfield and pointed out that the floor NW directional heave, roof creasing and local small fauh would be the major causes to cause the present tectonic coal space distribution and thickness variation. The study and analysis were conducted on the formation mechanism. The analysis showed that the tectonic coal in Jiulishan Mine mainly was under the later structural stress role and the seam was the results of the plastic deformation between roof and floor.