摘要
福建煤田地质构造复杂,断层发育,岩层极其破碎且较松软,泥岩受挤压破碎为薄片状或烂泥状,给钻探施工造成许多困难,比如泥页岩水化膨胀,孔壁失稳导致孔内坍塌严重等。采用绳索取心技术,优选金刚石钻头,科学确定泥浆配比和钻进参数,成功解决了这些孔内技术难题,提高了钻探效率,降低了生产成本,取得的施工经验可供该矿区或该类地层的钻探施工借鉴。
The geological structure is complex in Fujian coalfield with fault development, fractured and loose rock formations and thin sheet or muddy mudstone by being extrusion, which cause many difficuhies for drilling; such as mud shale hydration expansion and severe hole collapse led by hole wall instability, etc. By the use of wire-line core drilling technology, optimum the diamond bit and scientific ratio of mud and drilling parameters, the technical difficulties in holes were successfully solved. The drilling efficiency is improved and the production cost is reduced.
出处
《探矿工程（岩土钻掘工程）》
2015年第8期39-42,共4页
Exploration Engineering:Rock & Soil Drilling and Tunneling
关键词
深孔钻探
绳索取心钻进
钻进参数
福建煤田
deep hole drilling
wire-line core drilling
drilling parameters
Fujian coalfield
