薄煤层长短钻孔联合注水技术的应用  

Application of long and short hole coal seam water injection technology

作　　者：张文[1] 刘荣华[1] 王鹏飞[1] 汤梦 桂哲[1] 

机构地区：[1]湖南科技大学能源与安全工程学院,湖南湘潭411201

出　　处：《矿业工程研究》2015年第3期32-36,共5页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(50674060)

摘　　要：为了控制煤炭开采过程中产生的煤尘,采用煤层注水降尘技术这种相对主动的、积极有效的降尘措施,应用于煤矿生产实践中,改善工人的作业环境及保障矿井的安全生产.通过分析煤层注水机理及注水效果影响因素,结合垞城煤矿92103综采工作面煤层硬度大、注水困难等复杂条件,选择长、短钻孔联合注水方式确定注水参数后进行试验研究,考察煤层注水降尘效果.结果表明:煤层注水后煤样全水分平均为4.10%,煤层新增水分1.32%,工作面主要工作场所降尘率超过65%,同时工作面回风隅角瓦斯浓度下降约20%,后期钻孔煤粉量明显减少,降尘效果显著.This paper is to introduce a relatively active and positive as well as effective measure to reduce the coal dust produced in the process of coal mining by taking the technology of injecting water to the coal seams used in the coal mine production practice,so as to improve the worker's working environment and guarantee the safe production of coal mines. For this purpose,this paper analyzes the mechanism of injecting water to coal seams and the effect factors of water flooding,combined with the difficult and complex working conditions of92103's fully mechanized coal mining face in Chacheng Coal Mine. It designs the method of long and short hole joint water injection,layout of hole,and water injecting parameters. It also investigates the dust- decreasing effect of coal injection after choosing the parameters with long borehole in coal injection. Results show that the injected- coal sample's average moisture content is 4. 10%,and the new moisture is 1. 32%. The workplace's dust decrease rate of major working face is up to more than 65%,and the number of gas in the angle of up corner of working face goes down 20%. The pulverized coal volume of the drill hole in the later period decreases significantly,and the dust- decreasing effect is remarkable.

关 键 词：煤层注水降尘 长短孔联合注水 效果分析 

分 类 号：TD714.4[矿业工程—矿井通风与安全]