摘要
为解决高河能源高强度开采导致综放工作面瓦斯涌出量大的问题,采用理论计算和相似材料模拟相结合的方法在E2306工作面进行了大直径顶板裂隙带走向长钻孔瓦斯抽采技术的研究。研究结果表明:裂隙带发育高为18~89.63 m,并结合煤层顶板岩性,确定钻孔最佳布孔层位在18~38 m;将优化层位在现场设计施工钻孔,钻场稳定阶段平均抽采纯量为7.64 m^(3)/min,最大抽采纯量达到10.72 m^(3)/min,平均抽采体积分数为3.49%,最大抽采体积分数达9.22%,大直径顶板裂隙带走向长钻孔累计抽采瓦斯911200 m^(3);通过对单孔抽采数据进行分析,进一步优化大直径顶板裂隙带长钻孔参数,垂直方向为煤层上方20~25 m,水平位置宜布置在30~50 m内,抽采后工作面隅角瓦斯平均体积分数为0.24%,瓦斯治理效果较好。
In order to solve the problem of large gas emission in fully mechanized caving face caused by high-intensity mining of Gaohe Energy,the research on the gas drainage technology of long borehole with large diameter roof fracture zone was carried out in E2306 working face.Based on the combination of theoretical calculation and similar material simulation,the development height of fracture zone is determined to be 18~89.63 m,and combined with the lithology of coal seam roof,the optimal hole layout horizon is determined to be 18~38 m.The optimized horizon was designed and drilled on site.The average extraction volume in the stable stage of the drilling site is 7.64 m^(3)/min,the maximum extraction volume reaches 10.72 m^(3)/min,the average drainage concentration is 3.49%,the maximum drainage concentration is 9.22%,and the gas drainage from the large-diameter roof fracture zone is 911200 m^(3).Through the analysis of single hole extraction data,the long drilling parameters of large-diameter roof fracture zone are further optimized.The vertical direction is 20~25 m above the coal seam,and the horizontal position should be arranged within 30~50 m.After drainage,the average gas concentration in the corner of the working face is 0.24%,and the gas control effect is good.The problem of large gas emission in the mining process of E2306 working face is solved,and the safe and efficient mining of the working face is ensured.
作者
欧阳剑
任威
张校勇
孙维吉
OUYANG JIan;REN Wei;ZHANG Xiaoyong;SUN Weiji(Shanxi Gaohe Energy Company Limited,Changzhi 046600,China;Collge of Mining,Liaoning Technical University,Fuxin 123000,China;School of Mechanics&Engineering,Liaoning Technical University,Fuxin 123000,China)
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2023年第4期420-426,共7页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金项目(51874166)
关键词
瓦斯抽采
相似材料模拟
大直径顶板走向长钻孔
层位
gas drainage
simulation of similar materials
long boreholes with large diameter roof strike
horizon
作者简介
欧阳剑(1983-),男,湖南永州人,工程师,主要从事煤矿瓦斯灾害防治方面的研究。
