陕西神府煤田新民烧变区煤层自燃边界范围的遥感调查

本课题以可见光黑白航空像片为主要信息源,对陕西神府煤田新民烧变区进行了1:5万航空遥感地质调查,圈定了该区烧变岩分布范围及煤层自燃边界线。文中着重介绍了遥感调查煤层烧变区的技术方法与工作成果。调查区为煤层自燃死火区。调查首先从烧变岩的基本地质特征入手,划分了烧变岩的宏观类型,确定了烧变岩的主要形成时代,探讨了烧变岩的形成机理;第二,根据掌握资料选取已知区,研究烧变岩及煤层自燃边界线的影像特征,建立初步解译标志;第三,在全区范围内进行煤层自燃边界线的遥感调查,并对解译标志进行补充、修改与完善。在调查中,解译与调绘相结合,遥感与地面调查方法相结合,最终圈定了区内各煤层的自燃边界线,并经钻孔验证,精度达到要求。

REMOTE SENSING SURVEY OF BURNT COAL SEAMS BOUNDARY IN XIN-M1NG DISTRICT OF SHEN-FU COALFIELD, SHANXI PROVINCE

Black/white aerial photographs with visible light (1:35000) are used as main information source to fulfil aerial remote sensing survey on scale of 1:50000 in our project. Distribution of burnt rock and ignition boundary of coal seams in Xin-ming district (covered an area of 1300 km2 in shen-fu coalfied) had been indentified (trapped). Author of this paper given an introduction to the methodology and results of burnt coal area investigation by means of remote sensing. Target of the investigation is an extinct-burnt area. The first task of the study started with basic geological characteristics investigation is to divide macro-lithotype of burnt rocks, determine its forming epoch and make approach to the mechanism of its genesis. The second task of the study is to establish preliminary interpreting indices by means of studying image features of burnt rock and ignition boundary, which is carried out in a known area selected in the light of existed data. The third task of the study is to complete the remote sensing investigation for burnt coal boundary all over the district, to replenish, molify, and perfect the original interpreting indices. During the investigation, interpretation was combined with survey; remote sensing was combined with conventional methods. Finally, the ignition boundaries of coal seams are trapped, the accuracy requirements are fulfilled through borehole examination.