基于采空区地面井抽采数据评估煤矿卸压开采性能研究  

Evaluation of Coal Mine Pressure Relief Mining Performance Based on Surface Well Extraction Data in Goaf

作　　者：王军[1] Wang Jun(Shanxi Xiangning Coking Coal Group Shenjiao Coal Industry Co.,Ltd.,Linfen Shanxi 042103,China)

机构地区：[1]山西乡宁焦煤集团神角煤业有限公司,山西临汾042103

出　　处：《山西化工》2024年第8期223-225,共3页Shanxi Chemical Industry

摘　　要：采空区地面井(SGV)作为一种卸压式煤矿瓦斯开采防突技术已被成功实施和应用,掌握卸压开采与地面井之间的内在联系对煤矿安全生产是非常必要的,然而,目前对该方向的实证分析和描述性分析还不够充分。本文以乡宁焦煤某矿4个工作面的29个采空区地面井为例,对采空区的总瓦斯流量进行了分析,包括排气压力、地面井直径、生产数据、到工作面的距离等内容,将煤层瓦斯流量的演化划分为急剧上升阶段、下降阶段和稳定阶段。结果表明,煤层降压作用和透气性增强是造成急剧上升阶段的主要原因,下降阶段则是煤层逐渐压实和瓦斯压力下降引起的,其后者是主控因素。与不加卸压开采的直接抽采工艺相比,瓦斯抽采量增加了328.67倍,说明卸压开采显著提高了瓦斯抽采效果。Surface wells in goaf areas(SGV)have been successfully implemented and applied as a pressure relief gas mining and outburst prevention technology in coal mines.It is necessary to grasp the internal relationship between pressure relief mining and surface wells for coal mine safety production.However,currently,empirical and descriptive analysis in this direction is not sufficient.This article takes 29 surface wells in 4 working faces of a certain mine in Huainan as an example to analyze the total gas flow in the goaf,including exhaust pressure,surface well diameter,production data,and distance to the working face.The evolution of coal seam gas flow is divided into a sharp upward stage,a downward stage,and a stable stage.The results indicate that the depressurization effect and enhanced permeability of coal seams are the main reasons for the sharp upward phase,while the downward phase is caused by the gradual compaction of coal seams and the decrease in gas pressure,with the latter being the main controlling factor.Compared with the direct extraction process without pressure relief mining,the gas extraction amount has increased by 328.67 times,indicating that pressure relief mining significantly improves the gas extraction effect.

关 键 词：地面井 抽采流量 卸压开采 

分 类 号：TD712.6[矿业工程—矿井通风与安全]