43results about How to "Improve rock drilling efficiency" patented technology

A pulse drilling machine (1;1′) for the generating of shock wave pulses in a tool direction (R) has an impulse piston (4;4′) with a housing (2), and a device (8) for abruptly changing fluid pressure influencing the impulse piston to achieve a force resultant on the impulse piston in the tool direction to generate a shock wave pulse in a drill string (13; 13′) which is connected to the machine, a first fluid chamber (14;3′) inside the housing which in operation is arranged to exert a pressure in the tool direction on the impulse piston. The machine has a fluid flow channel (11; 18; 19), which includes a device for damping fluid flow flowing from the first fluid chamber through the fluid flow channel obtained when influencing the impulse piston (4; 4′) in a direction opposite to the tool direction (R) by rock reflexes in the drill string during drilling.

The invention discloses a hydraulic rock drill measuring and controlling system which comprises a power mechanism, an executing mechanism, an overflow valve, a rock drilling control valve and an electrical system. The power mechanism comprises a unidirectional pump for supplying oil to a hydraulic system. The executing mechanism comprises a propulsion hydraulic cylinder, a rock drilling machine and a rotary borer motor. The overflow valve comprises a guiding type proportional overflow valve body and an overflow valve body. The rock drilling machine control valve comprises a guiding type proportional pressure-reducing valve body, a high-speed on-off valve body, a guiding type solenoid directional valve body and a one-way valve body. The measuring and controlling system comprises four pressure sensors, three flow sensors, an amplifier, a datum acquisition machine card, a rock drilling state identification system and a controller. The working state of the hydraulic rock drilling machine is matched through the electrical system and compared with a corresponding normal rock-drilling state, and the errors of working parameters of the system are obtained and corrected. According to the hydraulic rock drill measuring and controlling system, real-time monitoring and control over the hydraulic rock drilling machine can be realized through the measuring and controlling system, so that the working state of the rock drilling machine is kept in the efficient rock drilling state in the process of rock-drilling propulsion.

The invention discloses a transition connection mining technique from outdoor mine to underground mine. A transition stage(2) from outdoor mining to underground mining is divided into a connection production middle section (4) and an emergency middle section (5); in the emergency middle section (5), mine chambers (13) and mine columns are divided, and the mine chambers (13) are firstly recovered by utilizing an open-stope method; in the mine chambers (13), upward drainage ventilation holes (12) are dug to be communicated with the connection production middle section (4); an enclosed waterproof door (11) is installed in a development drift (16) in the emergency middle section; a VCR (vertical crater retreat) method is adopted for mining by drilling rocks through an outdoor punching device (6) and discharging ores through an underground bottom structure; a drainage well (14) is drilled between a blind oblique well (10) and the waterproof door (11) and is communicated with the middle section of a main water bin; water accumulated in the mine chambers (13) is pumped and exhausted to the ground surface by a water pump in the main water bin, and the mine columns are recovered; then the underground mining stage (3) is transited. According to the invention, the safe and stable transition from outdoor mining to underground mining is realized, and the problems of underground sudden inflow of water threat, great damage of the preserved mine columns and difficulty in recycling at the rear stage are solved.

The invention relates to a non-pillar deep-hole backing-type mining method. The method is suitable for that: the digging height is between 10 and 50 m; the length of a stope is between 40 and 80 m; the width of the stope is between 7 and 9 m; the dip angle of an ore body is between 68 and 90 degrees; the height of a bottom ore removal chamber is between 2.5 and 3.5 m; the height of an upper part rock drilling chamber is between 3.4 and 3.8 m; meanwhile, an explosive charge structure, an explosion initiating sequence, stope side lacing and top plate control are determined according to the conditions of the stope, and a remote-control scraper and a remote-control crushing trolley are jointly used to treat large ore materials for ore removal. The mining method has the advantages of small mining-cutting engineering quantity, simple mining-cutting process, high rock drilling efficiency, good blasting effect, safe and efficient ore removal process, can effectively improve the wide-spacing stoping safety for underground metal mines nationwide, can upgrade the mining technical level for the underground metal mines in China, can promote the development of nationwide underground metal mine mining technology, and can reduce the dilution rate and loss rate of nationwide underground metal mine spacing stoping stopes, so as to promote the maximal recycling of metal resources.

The invention relates to an automatic rock drilling device special for tunnel excavation, which has high rock drilling efficiency, is safe for using and contributes to saving time and construction cost. The automatic rock drilling device comprises a control stand, a support frame, a power device, a movable carrier and rock drilling equipment, wherein the support frame is arranged on the carrier; the power device, the control stand and the rock drilling equipment are arranged on the support frame; the power device is connected with the rock drilling equipment through a lead; the control stand is connected with the power device and the rock drilling equipment through leads respectively; the support frame is a square frame body; the support frame body is provided with at least one group of platforms capable of extending and contracting towards both sides; the rock drilling equipment comprises one or more groups of mechanical arms and drill bits arranged on the mechanical arms; one end of each mechanical arm is connected to the frame body; and the other end of each mechanical arm is provided with a drill bit. The automatic rock drilling device has the advantages of high rock drilling efficiency, use safety, saving in time and construction cost, and the like.

The invention relates to a wind-water linkage device for a hydraulic rock drill, which includes an air pipe, a water pipe, and a communication pipe; the air pipe and the water pipe are connected through the communication pipe, and a check valve is provided at the end of the communication pipe close to the air pipe. One end close to the water pipe is provided with a first ball valve; the outlet of the air pipe is connected with the head of the hydraulic rock drill, and the outlet of the water pipe is connected with the drill bit of the hydraulic rock drill; Improve the structure of the wind pipe and water pipe to connect the air and water, use the combined effect of wind and water to clean the drill pipe in time, remove rock dust, improve rock drilling efficiency, and at the same time greatly reduce the wear of drill rods and drill bits , improve equipment utilization efficiency, and ultimately ensure construction efficiency.