基于瓦斯地质信息平台对瓦斯赋存及分布的探讨性分析

Explorative Analysis on Gas Occurrence and Distribution Based on Information Platform of Coal-bed Gas Geology

煤层的瓦斯赋存及分布条件主要由聚煤期前后的沉积环境及其演化过程、区域性及局部地质构造条件所控制,矿区、煤矿直至煤层范围内的沉积环境及构造条件受到整体的沉积体系、地质演化过程及板块构造所控制。利用全国瓦斯地质信息平台,从各级别的沉积环境、瓦斯地质以及各煤矿区煤矿基本情况专题图,对瓦斯赋存及分布进行探讨性分析及评价,实现了对地质沉积在沉积、层序地层演化、构造等进行时空上的图形及关联信息综合展现,并通过对大构造区域范围到煤层局部范围内影响煤矿区瓦斯赋存因素的综合分析,有效地对煤层瓦斯赋存特征进行探讨性的预测评价。

The gas occurrence and distribution are mainly subjected to the control of the sedimentary environment, the evolution and the regional and local geological conditions of coal seams, and the sedimentary environment and the structural conditions in a coal mining area, mine and even in the range of coal seams are subjected to the control of the overall sedimentary systems, the geological evolution process and plate tectonics. In this paper, explorative analysis and evaluation on the gas occurrence and distribution were carried out by using the information platform of coal-bed gas geology and according to the different sedimentary environment, coal-bed gas geology and the basic conditions of each mining area, which realized the integrated show of the time-space graphics and associated information of the geologic sedimentation and the evolution and structure of sequential strata. Based on the comprehensive analysis of the influence factors of gas occurrence from the regional range of large structures to the local range of coal seams in a mining area, explorative prediction and evaluation on the characteristics of coal seam gas occurrence were effectively conducted.