摘要
针对淮北矿区松软煤巷条带消突采用"底板巷—穿层钻孔"成本高且效率低现状,采用顺层气动定向钻进技术,按钻孔设计精准控制钻孔轨迹于预抽条带煤层中,通过钻孔抽采瓦斯实现煤巷条带消突。根据淮北矿区松软煤层特性,开展煤巷条带预抽瓦斯定向孔设计、气动定向钻进装备选型、软煤定向孔成孔与护孔工艺、抽采效果评价等研究。该技术成功应用于淮北某矿Ⅲ635工作面煤巷条带消突,试验7个孔深均大于300m钻孔,且全程下筛管,创造两淮软煤矿区顺层钻孔372 m最深记录,成功保障煤巷掘进,减少底板巷和穿层钻孔,为软煤矿区煤巷条带瓦斯高效治理探索出新方法。
It is costly and inefficient to drill through floor tunnel to eliminate outburst in soft coal roadway strip in Huaibei Mining Area.The bedding pneumatic directional borehole technology can accurately control the borehole trajectory in the strip coal seam according to the design,and realize the outburst elimination of the strip coal roadway through drilling gas extraction.Based on soft coal seam characteristics of the Huaibei Mining Area,the coal lane stripes drainage of gas in the directional hole design,selection of pneumatic directional drilling equipment,directional bore blastholes and shield technology,the evaluation of extraction effect are studied.The technology has been successfully applied in working faceⅢ635 for outburst elimination in Huaibei mining area.Seven boreholes were drilled,each of which was more than 300 m deep,and the screen was lowered throughout the whole process,creating the deepest record of 372 m bedding drilling in Huainan and Huaibei soft coal mining area.This successfully covers the excavation of coal roadway,reduces floor roadway and borehole through bed,and explores a new method for efficient gas control of coal roadway strip in soft coal mining area.
作者
张杰
ZHANG Jie(Xi’an Research Institute Co.Ltd.,China Coal Technology and Engineering Group Corp.,Xi’an 710077,China)
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2021年第3期256-261,共6页
Coal Geology & Exploration
基金
国家重点研发计划课题(2018YFC0808005)。
关键词
软煤矿区
气动定向成孔
煤巷条带
瓦斯预抽采
淮北矿区
soft coal mining area
pneumatic directional hole forming
coal lane strip
gas pre-drainage
Huaibei Mining Area
作者简介
张杰,1983年生,男,湖北黄冈人,硕士,副研究员,从事煤矿井下钻探新技术与装备研发.E-mail:zhangjie@cctegxian.com。
