Vol.28 No.9 谭卓英等：基于岩石可钻性指标的地层界面识别理论与方法 ·807。 金刚石与磨料磨具工程，202(3)：32 2001,15(3):177 【习张厚美，薛佑刚.岩石可钻性方法探讨.钻采工艺，1999， 【10谭卓英，赖海辉.冲击回转式凿岩扭矩的分析与计算.矿 22(1):10 业研究与开发，1993(4)：19 Spoar J R.Ledgerwood L W,Christensen H.t al.Forma 【1山徐军，李春兰，卢文发，等.旋转机械的功率在线测试. tion compressive strength estimates for predicting drillabilities 热能动力工程，1999,14：135 and PDC hit selec tion.Proc Dril ling Conf,1995:569 【1滕子军.用钻进参数仪实时判层.煤田地质与勘探， 【刁杜镰，杨世良。岩石可钻性能量法现场实验研究。西南石 2000.28(2):58 油学院学报，1994,16(4)：66 13]Tan Z Y.Report on Field Tests at Lam Tin Ho Man Tin [8张绍和。一种新的岩石可钻性分析方法研究.探矿工程， Sites,Drilling Process Monitor System (DPM)for Hydraulc 1999(6:32 Drill Rig.Hong Kong:Hong Kong University,Hong Kong 9 Liu H.Yin KK.Analysis and interpretation of monitored ro Jockey Club.2002 tary blasthole drill data.Intl J Surf Min Reclam Environ. Theory and approach of identification of ground interfaces based on rock drilla- bility index TAN Zhucy ing,CAI Meifeng",Z.Q.Yue2),L.G.Tham2,C.F.Lee2 1)State Key Laboratory of High Efficient Mining and Safety of Metal Mines(University of Science and Technology Beijing).Ministry of Edu cation.Beijing 100083.China 2)Department of Civil Engireering.Hong Kong University,Pokfulam Road,Hong Kong.China ABSTRACT Rock drillability index is a very key parameter in selection of drill bit type and determinat ion of productivity in petroleum,mining and geology.Unfortunately,there are many limits in the current defi- nition as well as experimental methods.Drillability is redefined and a new concept of drillability index is brought out from analysis.Under the new concept,the drillability index is defined as penetration rate un- der specific energy.Based on the coupling relationship among effective thrust,rotation speed,penetrat ion rate and drillability index,a calculation formula is established.Besides,the sensitivity of the drillability in- dex in identification of ground layer is analyzed and its physical signification is ex patiated also.The result shows that the new index overcomes the blind area in the traditional concept and can be used in continuous identification of ground layer along bo rehole profile. KEY WORDS rock drillability:ground interface;identification;drilling parameters;coupling relationship金刚石与磨料磨具工程, 2002( 3) :32 [ 5] 张厚美, 薛佑刚.岩石可钻性方法探讨.钻采工艺, 1999, 22( 1) :10 [ 6] Spoar J R, Ledgerw ood L W, Christensen H, et al.Forma￾tion compressive strength estimates for predi cting drillabilities and PDC bit selection.Proc Drilling Conf, 1995:569 [ 7] 杜镰, 杨世良.岩石可钻性能量法现场实验研究.西南石 油学院学报, 1994, 16( 4) :66 [ 8] 张绍和.一种新的岩石可钻性分析方法研究.探矿工程, 1999( 6) :32 [ 9] Liu H, Yin K K .Analysis and interpretation of monit ored ro￾t ary blasthole drill data .Intl J Surf Min Reclam Environ, 2001, 15( 3) :177 [ 10] 谭卓英, 赖海辉.冲击回转式凿岩扭矩的分析与计算.矿 业研究与开发, 1993( 4) :19 [ 11] 徐军, 李春兰, 卢文发, 等.旋转机械的功率在线测试. 热能动力工程, 1999, 14:135 [ 12] 滕子军.用钻进参数仪实时判层.煤田地质与勘探, 2000, 28( 2) :58 [ 13] Tan Z Y.Report on Field Tests at Lam Tin &Ho Man Tin Sites, Drilling Process Monitor System ( DPM) for Hydraulic Drill Rig .Hong Kong :Hong Kong University, Hong Kong Jockey Club, 2002 Theory and approach of identification of g round interfaces based on rock drilla￾bility index TAN Zhuoy ing 1) , CAI Meifeng 1) , Z .Q .Y ue 2) , L .G .Tham 2) , C .F .Lee 2) 1 ) St at e Key Laborat ory of High-Efficient Mining and S afety of Metal Mines ( University of Science and Technology Beijing) , Ministry of Edu￾cation, Beijing 100083, China 2) Department of Ci vil Engineering, Hong Kong University, Pokfulam Road, Hong Kong, China ABSTRACT Rock drillability index is a very key parameter in selection of drill bit ty pe and determination of productivity in petroleum, mining and geology .Unfortunately , there are many limits in the current defi￾nition as well as experimental methods.Drillability is redefined and a new concept of drillability index is brought out from analysis .Under the new concept, the drillability index is defined as penetration rate un￾der specific energ y .Based on the coupling relationship among effective thrust, ro tation speed, penetration rate and drillability index, a calculation formula is established .Besides, the sensitivity of the drillability in￾dex in identification of ground layer is analyzed and its physical signification is ex patiated also .The result shows that the new index overcomes the blind area in the traditional concept and can be used in co ntinuous identification of g round layer along bo rehole profile . KEY WORDS rock drillability ;g round interface;identification ;drilling parameters ;coupling relationship Vol.28 No.9 谭卓英等:基于岩石可钻性指标的地层界面识别理论与方法 · 807 ·