瓦斯抽采钻孔新型封孔工艺试验研究  

Experimental Study on New Sealing technology of gas extraction borehole

作　　者：王科文 Wang Kewen(Shanxi Lanhua Sci-tech Venture Co.,Ltd.,Bofang Coal Mine Branch,Shanxi Gaoping 048400)

机构地区：[1]山西兰花科技创业股份有限公司伯方煤矿分公司,山西高平048400

出　　处：《山东煤炭科技》2023年第9期128-130,共3页Shandong Coal Science and Technology

摘　　要：为保证瓦斯抽采效果,根据伯方煤矿3#煤层瓦斯抽采浓度较低的现状,研究膨胀水泥+相变凝胶的新型封孔工艺,改进钻孔封堵方式。根据试验相变凝胶凝胶时间较长,且凝胶点可控,固结后其黏度大于30万MPa·s,起到很好的固结封孔作用。实践表明:相比于传统封孔注浆工艺,新型封孔方式在单位时间内单孔瓦斯抽采浓度提高2倍,瓦斯抽采纯量提高1.5倍,瓦斯抽采效果明显提高。To ensure the effect of gas extraction,according to the current situation of low gas extraction concentration in No.3 coal seam of Bofang Coal Mine,the new sealing technology of expansion cement+phase change gel is studied to improve the drilling sealing method.According to the test,the phase change gel has a long gel time,controllable gel point,and its viscosity after consolidation is greater than 300,000 MPa·s,which plays a good role of consolidation and hole sealing.The practice shows that compared with the traditional sealing grouting process,the new sealing method can increase the concentration of gas extraction by 2 times and the pure gas extraction by 1.5 times per unit time,and the gas extraction effect is significantly improved.

关 键 词：瓦斯抽采 封孔工艺 膨胀水泥 相变凝胶 

分 类 号：TD712.6[矿业工程—矿井通风与安全]