Presentation is loading. Please wait.

Presentation is loading. Please wait.

Canadian Diamond Drilling Association Vancouver, BC May 29, 2008 Technically Demanding Cement Grout Applications Involving Diamond Core Drilling Peter.

Similar presentations


Presentation on theme: "Canadian Diamond Drilling Association Vancouver, BC May 29, 2008 Technically Demanding Cement Grout Applications Involving Diamond Core Drilling Peter."— Presentation transcript:

1 Canadian Diamond Drilling Association Vancouver, BC May 29, 2008 Technically Demanding Cement Grout Applications Involving Diamond Core Drilling Peter White, P.Eng

2 Diamond Core Drilling for Grouting Projects: In The Hole

3 Diamond Core Drilling for Grouting Projects: In The Hole Around The Hole

4 Diamond Core Drilling for Grouting Projects: In The Hole Around The Hole Beyond The Hole

5 Diamond Core Drilling for Grouting Projects: In The Hole Around The Hole Beyond The Hole Typically Bad Ground Conditions

6 Recent Diamond Drilling Contractors with Technical Grouting Projects: Boart Longyear (FNX Podolsky) Forage Orbit Garant (FNX Podolsky) Major Drilling (Goldcorp & Diavik) Progressive Drilling (PCS Picadilly) Hy-Tech Drilling (McArthur River)

7 Grouting Project Profiles 1. Agnico-Eagle, Finland 2. Goldcorp, Red Lake, Ont. 3. Hsuehshan Tunnel, Taiwan 4. Pan American Silver, Peru

8 Agnico-Eagle, Finland Kittilä Mine Ventilation Raise Through Water-Bearing Formations

9 Problem: To Seal Water-Bearing Formations Prior to Vent Raise Excavation Agnico-Eagle, Finland

10 Solution: Systematic Perimeter Drill Hole Pattern Down Stage Cement Grouting Grouting Strategy Specified Grout Mixtures Target Grouting Parameters Agnico-Eagle, Finland

11 5 m 25 m 40 m Fractured Broken Water-Filled Overburden Raise Bore Machine Tent

12 4 m dia Raise Bore Reamer

13 Typical Raise Bore Enclosure

14

15

16 Drill Casings for Electrical Cables

17 Drill Casings for Mine Backfill Pipes

18 Diamec U6 Drill Rig

19 Cemix 203 H Colloidal Mixer

20 Cemag 403 H Agitator Tank

21

22 Key Elements for Success: Experienced Contractor Appropriate Drilling and Grouting Equipment Selection of Suitable Cements for Site Conditions Appropriate Use of Grouting Additives Consistent Range of Grout Formulations Target Grout Volumes and Decision Criteria Limited Duration Grouting Operations Agnico-Eagle, Finland

23 Goldcorp Red Lake Mine Ventilation Raise With Major Water-Bearing Fracture

24 Problem: To Seal Water-Bearing Fault In Pilot Hole at 400 ft Depth And Reduce 20 GPM Water Inflow Before Reaming Raise to 18 ft Dia Goldcorp, Red Lake Ont.

25 Solution: Plug Pilot Hole to Stop Water Inflow Systematic Perimeter Drill Hole Pattern Microfine Cement Grouting Goldcorp, Red Lake Ont.

26 400 ft Water-Bearing Fracture Overburden 20 GPM 15 inch dia Pilot Hole

27 400 ft Water-Bearing Fracture Overburden Diamond Drill Inflatable Packer + Internal Valve HQ Drill Rods + Safety Cable

28 400 ft Grout Hole Grout Hole Water Circulation 40 ft 25 ft

29 400 ft Grout Hole Grout Hole Drain Water Column

30 400 ft Grout Hole Grout Hole Remove Inflatable Packer 2 GPM

31

32

33

34

35

36

37

38

39

40 Foot Clamp & Safety Cable Sheave Wheel

41 Safety Cable Sheave Wheel HQ Drill Rods in 15 inch Hole

42 Vent Raise at Surface Hole # 1 Hole # Goldcorp Vent Raise Grouting 2005 Grout Hole Survey Results P White November 3, 2005 Red solid lines indicate surveyed hole trajectory from surface to approximately 400 ft Tan Tag - Tight Hole - zero or low grout consumption Yellow Tag - grout consumption in between tan & green holes Green Tag - Open Hole - high grout consumption Blue Circle Numbers indicate grouting sequence Hole # 4 Hole # 3 37 ft 16 ft 26 ft 33 ft Hole # 6 Hole # 7 Hole # 5 80 ft Circle50 ft Circle 33 ft 24 ft 26 ft #1 #2 #3 #4 #5 #6 #7

43 Vent Raise at Surface Hole # 1 Hole # Goldcorp Vent Raise Grouting 2006 Drill Hole Locations P White April 11, 2006 Red solid lines indicate surveyed hole trajectory from surface to approximately 400 ft Tan Tag - Tight Hole - zero or low grout consumption Yellow Tag - grout consumption in between tan & green holes Green Tag - Open Hole - high grout consumption Blue Circle Numbers indicate grouting sequence Hole # 4 Hole # 3 25 ft 16 ft 26 ft 16 ft Hole # 6 Hole # 7 Hole # 5 80 ft Circle 20 ft 24 ft 16 ft #1 #2 #3 #4 #5 #6 #7 Hole # 11 #8 Hole # 10 Hole # 9 Hole # 8 Hole # 12 #9 #10 #11 #12 13 ft 16 ft 20 ft

44 Key Elements for Success: Innovative Approach to Eliminate Groundwater Movement Appropriate Drilling and Grouting Equipment Water Pressure Testing To Assess Site Conditions Selection of Suitable Cements Gyro-Survey to Plot Drill Hole Positions Goldcorp, Red Lake Ont.

45 Hsuehshan Tunnel Taiwan Exploration Drillhole In Blocky Ground

46 Problem: To Drill Long Exploration Holes In Advance of Tunnel Heading Previous Contractor Could Not Drill Beyond 100 m Hsuehshan Tunnel,Taiwan

47 Solution: Controlled Drilling Fast-Setting, High-Strength Grout Downstage Grouting Methods Using Inflatable Packers Hsuehshan Tunnel,Taiwan

48

49

50 4.8 m Dia Pilot Tunnel Robbins TBM Twin m Dia Road Tunnels Wirth TBM Hsuehshan Tunnel Project

51

52

53

54

55

56

57 Tunnel Advance -> Drill Station Exploration Drillhole Tunnel Portal <- 2,000 m Hsuehshan Tunnel Project

58 Challenges: Limited Success with Conventional Drilling (P>H>N>B>A) Client & Contractors With Limited Grouting Experience Hsuehshan Tunnel,Taiwan

59

60

61

62

63 Drilling Direction Portion of Drill Hole Previously Drilled and Grouted Deteriorating Drilling Conditions Satisfactory Drilling Conditions Difficult Drilling Conditions

64 Drilling Direction Set Inflatable Packer Here Pump Accelerated Set Time High Strength Cement Grout Only at Bottom of Hole Grout Formulation: Low W:C Ratio Warm Water Cement CaCl

65 Key Elements for Success: Innovative Drilling Contractor Seeking Solutions Grouting Knowledge & Relevant Experience Appropriate Drilling and Grouting Equipment Fast-Setting High-Strength Cement Grout Hsuehshan Tunnel,Taiwan

66 Pan American Silver Unidad Huaron Peru Shaft Sinking In Water-Bearing Ground

67 Problem: To Drill and Grout In Advance of Shaft Sinking From Upper Level Access With High Rates of Water Inflow Pan American Silver, Peru

68 Solution: Controlled Drilling Controlled Grouting Downstage Grouting Methods Using Inflatable Packers Pan American Silver, Peru

69

70 COTA 4207 COTA 4232 COTA 4163 COTA m10 m Existing Shaft Zone to Be Grouted Prior to Shaft Sinking Water-Bearing Fault Zone Drill Hole Pattern Shaft Station & Loading Pocket

71

72

73

74

75

76 Key Elements for Success: Innovative Mining Company Seeking Solutions Grouting Knowledge & Relevant Experience Appropriate Drilling and Grouting Equipment Down Stage Drilling & Grouting Methods Pan American Silver, Peru

77 Looking For Water Inflow Problems??

78

79

80

81 (800)


Download ppt "Canadian Diamond Drilling Association Vancouver, BC May 29, 2008 Technically Demanding Cement Grout Applications Involving Diamond Core Drilling Peter."

Similar presentations


Ads by Google