Shaanxi Jianxin Coal Chemical Co., Ltd.

为了获得建新煤矿4-2煤层的瓦斯赋存规律以及主控因素,从煤岩层特征以及煤层瓦斯含量入手,讨论地质构造、顶底板岩性、煤层厚度、煤层埋深及煤层底板标高各种因素对瓦斯含量的影响,明晰建新煤矿4-2煤层瓦斯赋存的主控因素。研究结果显示,建新煤矿4-2煤层的瓦斯含量与煤层厚度呈线性正相关,煤层的厚度直接影响着瓦斯含量的大小,煤层越厚,其瓦斯含量越大;煤层瓦斯含量与埋深呈正相关,随埋深的增加而逐渐增加;瓦斯含量与底板标高呈负相关关系。基于对建新煤矿4304工作面瓦斯含量的现场实测及分析,绘制瓦斯赋存规律等值线图,得到工作面瓦斯富集区。

In order to obtain the gas occurrence law and main control factors of the 4 - 2 coal seam in Jianxin Coal Mine,starting from the characteristics and gas content of the coal seam, the influence of various factors such as geological structure, roof and floor lithology, coal seam thickness, coal seam burial depth, and coal seam floor elevation on the gas contentwas discussed, and the main control factors of gas occurrence in the 4 - 2 coal seam in the mine were clarified. The researchresults show that the gas content of the 4 - 2 coal seam is linearly positively correlated with the thickness of the coal seam.The thickness of the coal seam directly affects the value of the gas content, and the thicker the coal seam, the greater its gascontent value; The gas content in the coal seam is positively correlated with burial depth, and gradually increases with the increase of burial depth; There is a negative correlation between gas content and floor elevation. Based on on-site measurementand analysis of gas content on the 4304 working face of the mine, an isoline map of gas occurrence law was drawn, and thegas enrichment area of the working face was obtained.