浅谈千米钻机在多层理、松软煤层的打钻技术.doc

浅谈千米钻机在松软、多层理煤层中的 打钻技术 Discussion on kilometer rig in soft, multilayer and in the coal seam drilling technology 冯亚楠（山西大同大学毕业，现工作晋煤集团沁秀公司岳城煤矿） 摘要：千米钻机是目前世界上较为先进的定向长钻孔施工设备，在本煤层定向长钻孔施工中有很好的应用基础。定向长钻孔的施工主要应用于掘进巷道的掩护抽放，从而实现巷道的“边掘边抽”，使矿井的“抽、掘、采”达到最优化。但在现实的情况中，定向（千米）长钻孔只能在煤层较为坚硬、且煤层层理简单的地质条件下施工成功，在较为松软、层理复杂的煤层下往往因为煤层塌孔而导致钻孔施工失败。针对上述现象我们提出了改变开孔角度（即与层理走向方向平行或近平行开孔），改变钻进速度（低压低速给进），百米旋转开孔等方法，大大提高了千米钻机在松软、多层理煤层中的成孔率，有效发挥了定向长钻孔的在掘进中抽放优势。 Abstract: Kilometer rig is currently the worlds more advanced long directional drilling construction equipment in the coal seam, long directional drilling construction has the very good application foundation. Long directional drilling is mainly applied in the excavation roadway cover drainage, thereby realizing roadway driving while pumping, make mine pumping, digging, collecting achieve optimization. But in realistic situations, directional ( km ) long borehole in coal seam, and the only relatively hard coal bedding simple geological construction under the condition of success, in the relatively soft, bedding complex coal seam often because of hole collapse in coal seam drilling failure. For the above phenomenon we propose changes of opening angle ( i.e., and bedding toward a direction parallel or nearly parallel hole ), change the drilling speed ( low pressure and low speed feed ), 100 meters rotary hole method, greatly improving the kilometer rig in soft, multilayer seam the pore-forming rate, effective play a directional long drilling in the process of digging drainage advantage. 关键词： 瓦斯抽放 松软、多层理煤层 定向长钻孔 千米钻机 Key Words: 显Gas drainage, multilayer soft seamdirectional drilling long, kilometer rig 概况 沁秀煤业公司岳城煤矿位于沁水县郑村镇、沁水煤田东南部、寺河井田东区和北区的交界处。矿井井田面积为 6.6557km2,可采储量约4608.2万吨，均为高变质程度的无烟煤。于2009年3月正式建成投产，年设计能力90万t/a,批准开采煤层3# 、9# 、15#，先开采的3#煤层厚度5.5-6.5m，平均为6m，伪顶为炭质泥岩，厚0.2-0.3m，直接顶为砂质泥岩，厚6-7m，老顶为砂岩，厚8m左右。煤体瓦斯含量平均14.54m3/t。矿井瓦斯鉴定结果为高瓦斯矿井，其中矿井相对瓦斯涌出量为234.53 m3/min，相对瓦斯涌出量为75.03 m3/t。 3#煤层瓦斯参数分别测定如下：瓦斯压力0.68Mpa，平均瓦斯含量14.54（m3/t）， 类别