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    • 13. 发明专利
    • BEDROCK PROBING METHOD
    • JP2002013381A
    • 2002-01-18
    • JP2000192945
    • 2000-06-27
    • NISHIMATSU CONSTR CO LTD
    • ISHIYAMA KOJIHIKIMA RYOICHIYAMASHITA MASAYUKITSUKADA JUNICHI
    • E21C39/00G01V9/00
    • PROBLEM TO BE SOLVED: To provide a bedrock probing method capable of easily and securely predicting geological features based on measuring data of a hydraulic system mainly when drilling a hole by a hydraulic rock drill. SOLUTION: Hole drilling energy indicating energy amount required for drilling a bedrock per unit volume is calculated by corresponding to hole drilling distance when the bedrock to be probed is drilled by the hydraulic rock drill 2 to predict the property of geological features based on the hole drilling energy. In the calculation of the hole drilling energy, impact energy is first calculated from a pressure receive area of a piston of a hydraulic cylinder device giving an impact when drilling the hole, a stroke length of the piston, and an impact pressure. Next, hole drilling energy is calculated from impact energy, the number of striking per unit time, hole drilling speed, and a hole cross sectional area for drilling the hole. When the hole is drilled, a feed pressure for pressing a bit of the hydraulic rock drill 2 against the bedrock is kept substantially constant during drilling of the hole.
    • 15. 发明专利
    • BURST FORCASTING METHOD OF ROCK CRUSHER
    • JPH09235975A
    • 1997-09-09
    • JP7520296
    • 1996-03-04
    • FUJITA CORP
    • NAKAZAWA TAKESHINAMITA MITSUTAKANOMA TATSUYA
    • E21C39/00
    • PROBLEM TO BE SOLVED: To make it possible to forecast a bursting rate of a rock crusher before the execution by inputting mechanical and geometric information for an object to be crushed when the tube type rock crusher is used to crush bedrock, concrete, etc. SOLUTION: A rock crusher formed by arranging a plurality of loading plates 25 on the outside of protect rubber 24 having a regular square section inserting a high bearing rubber tube 21 therein is inserted into a rock crushing hole formed in an object to be crushed, and high pressure water is supplied from a pressurized rubber hose 26 to make cracks in the rock crushing hole with the loading plates 25 to crush. A bursting rate g (X) of the rock crusher is forecasted from the formula: g(X)=T-N(1-sinϕ)#1u /2 where: T is the load resistance of the rock crusher, N is the coeeficient of the correction by the formation tolerance of the crushing position and the rock crushing hole, ϕis the inside friction angle of the object to be crushed, θu is the uniaxial compressive strength of the object to be crushed. By the constitution, a bursting rate of the rock crusher can be accurately forecasted.
    • 16. 发明专利
    • METHOD FOR MEASURING ROCK CUTTING DEPTH OF WEIGHT IN WEIGHT-TYPE ROCK CUTTING METHOD
    • JPH06160073A
    • 1994-06-07
    • JP33219392
    • 1992-11-19
    • TAISEI CORP
    • KAWAKAMI JUNGOTO HIDEKAZUFUKUI KATSUNORIYAEDA YOSHIHIROWAKIMOTO HIDEO
    • E21C39/00G01B21/08G01H17/00
    • PURPOSE:To measure a depth for rock cutting by a weight accurately by providing a vibration measuring apparatus on the ground in the vicinity of a rock cutting point, and measuring the vibration energy of the rock bed when the weight hits the rock bed. CONSTITUTION:When a weight 1 is made to hit the ground, the rock bed in the vicinity of the contact part of the weight 1 is broken by the energy of the weight. The weight 1 penetrates into the rock bed. The penetration is determined by the kinetic energy of the weight 1 immediately before the weight 1 hits the rock bed, the penetration resistance of the rock bed and the shape of the weight 1. Among the ground vibration energy, the rock cutting depth and the falling height of the weight 1, there is the relationship expressed by the specified expression including the constants such as the physical property of the rock bed and the measuring distance. The weight 1 is suspended from a working ship. When there is an island in the vicinity, a vibration measuring apparatus 2 is provided on the land. Preliminary rock cutting is performed, and the constants, which are included in the specified expression, are determined based on the ground vibrating energy from the apparatus 2 and the rock cutting depth, which is visually obtained by a diver. The dropping of the weight 1 is performed at the same height in the entire region, and the rock cutting depth is computed.