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我队勘探的涟源县思口煤矿为二迭系煤田,是个老矿区,曾因孔斜不过关而几上几下.为扩大矿区远景储量,1982年起又开展了-800米标高深部钻探工作.其地层多为薄层、极薄层状泥灰岩,单层厚度一般为0.2～1厘米,层理、节理、裂隙非常发育,岩层倾角20～87°.由于岩层薄且硬、脆、软交错,钻进中极易造成孔斜.根据过去一万多米工作量的统计,其孔斜率平均每百米为4°36’. 为了解决矿区严重孔斜的技术难关,1980年试验性推广使用了射流式冲击回转钻进新工艺,取得了预期效果.1982年正式投入生产,完成冲击回转钻进工作量
Our team explored the Lianyuan County Sikou coal mine is a two-tiered coal field, is an old mining area, once the hole due to cross the border and a few on .In order to expand the mine prospect reserve, in 1982 and launched a -800 meters elevation deep drilling Work.The layer is mostly thin, extremely thin layered marl, the thickness of a single layer is generally 0.2 to 1 cm, bedding, joints, fissures very well, rock dip angle 20 ~ 87 ° Because the rock is thin and hard, brittle , Soft staggered, extremely easy to cause drilling hole drilling oblique.According to the workload of more than 10,000 meters of statistics, the average slope of each hole is 4 ° 36 ’.In order to solve the technical difficulties of serious hole in the mining area, 1980 test The promotion of the use of jet impact rotary drilling new technology, and achieved the desired results in 1982 formally put into production to complete the impact rotary drilling workload