CAJ | 학술논문

针对本煤层瓦斯抽采钻孔封孔质量差、抽采浓度低、有效抽采周期短和抽采后期漏风严重的技术难题,研究了聚氨酯封孔及水泥封孔的特性,提出了“两堵一注”式顺层钻孔封孔新技术,阐述了该技术的基本原理和工艺参数.在平煤十矿戊8.9-20230工作面进行了工业试验,结果表明“两堵一注”式顺层钻孔封孔新技术增加了钻孔周围煤体的强度,减少了钻孔的漏风量,提高瓦斯抽采浓度30％~40％,提高抽采流量0.015 m3/min,延长抽采期2个月以上.
침대본매층와사추채찬공봉공질량차、추채농도저、유효추채주기단화추채후기루풍엄중적기술난제,연구료취안지봉공급수니봉공적특성,제출료“량도일주”식순층찬공봉공신기술,천술료해기술적기본원리화공예삼수.재평매십광무8.9-20230공작면진행료공업시험,결과표명“량도일주”식순층찬공봉공신기술증가료찬공주위매체적강도,감소료찬공적루풍량,제고와사추채농도30％~40％,제고추채류량0.015 m3/min,연장추채기2개월이상.
Aimed at such technical problems as poor sealing quality of boreholes for gas drainage,low drainage concentration,short period of effective drainage cycle and severe air leak in the later drainage period,the characteristics of borehole sealing by polyurethane and cement were studied,and a new"two sealing and one grouting"sealing technique of boreholes drilled aG long seam was proposed.Its basic principle and technological parameters were also described.MoG reover,the commercial test was carried out at E 8.9-20230 working face in No.10 Mine of PingG dingshan Tian'an Mining Co.,Ltd.The results showed that this new technique enhanced the strength of coal mass around the boreholes,decreased the amount of leaked air,increased the gas drainage concentration by 30%~40%,enhanced the drainage flow rate by 0.0015 m3/min,and prolonged the drainage period to over two months.