煤矿外围（深部）影响煤层瓦斯赋存的地质因素

吴桁

摘 要：煤层瓦斯的运移和赋存在开采过程中占有很重要的地位，其影响因素也是多种多样。为查明影响淮南潘集煤矿外围（深部）瓦斯赋存的地质因素，利用潘集煤矿外围勘查区勘探钻孔及煤样测试资料，结合潘集煤矿采掘实见资料，对影响瓦斯赋存的地质构造、煤层顶底板岩性、煤变质程度、煤层埋深、煤系地层的含水性等地质因素逐一分析，同时根据周边矿井生产实测资料，预测深部瓦斯赋存及分布规律。研究结果表明：地质构造（主要为断层和褶曲）、煤层顶底板、煤层埋深以及煤的变质程度是影响潘集煤矿外围（深部）瓦斯赋存的主要地质因素，且共同决定了本区煤层高瓦斯含量、高瓦斯压力及高地应力的特征。研究成果为进一步的采掘部署和瓦斯防治工作提供理论依据。

关键词：深部；瓦斯赋存；地质因素；分析

中图分类号： TD712 文献标志码：A [WT]文章编号：1672-1098（2017）03-0060-06

Abstract：The migration and occurrence of coal seam gas plays an important role in the process of mining. The influence factors are also varied. In order to identify the geological factors which affect the peripheral （deep） gas occurrence in Panji Coal Mine in Huainan.， in this paper， the geological factors， such as the geological structure， the lithology of the top， bottom of the coal seam， the degree of coal metamorphism， the depth of coal seam and the water content of the coal measures were analyzed one by one by using the Panji Coal Mine exploration area exploration drilling and coal sample test data and Panji Coal Mines mining real information. ； meanwhile， the laws of occurrence and distribution of deep gas were predicted according to the actual production data of surrounding mine. The results show that the geological structure （mainly faults and folds）， the seam roof and floor， the seam depth and the degree of metamorphism of coal are the main geological factors that affect the occurrence of gas in the periphery （deep） of Panji Coal Mine，and also determine the characteristics of high gas content， high gas pressure and high ground stress in the coal seam of this area. The research results provide theoretical basis for further excavation and gas control.

Key words：depth； gas occurrence； geological factors； analysis

1 概況

1.1 地理位置

潘集煤矿外围（深部）主要位于淮南市潘集区和凤台县境内，东北部位于蚌埠市怀远县境内，该区域煤炭资源丰富，是淮南矿区最重要的接替资源，经查明区块内煤炭资源量47.92亿吨，规模达特大型，范围具体为：北部及西部以朱集东、潘二、潘一、潘三、丁集煤矿的深部矿井边界为界，东部及南部以13-1煤层-1 500m水平地面投影线及谢桥向斜轴为界（见图1）。图1 淮南矿区构造纲要图（据安徽省煤田地质局勘查研究院，2016）

1.2 地质概况

潘集煤矿外围（深部）为新生界松散层所覆盖的全隐蔽井田，含煤地层主要为石炭系上统太原组和二叠系山西组与上、下石盒子组。……