75 results about "Down-the-hole drill" patented technology

The invention discloses a construction method applied to underground mine vertical shaft surrounding rock condition improvement. The construction method comprises the steps that a flat working face is cleaned, a temporary water nest is arranged for drainage, the drilling position is projected, and a down-the-hole drill is debugged; rock drilling is conducted according to the designed angle, direction and depth, propelling pressure is adjusted along with the depth, and cleaning and plugging are conducted after hole forming; grouting pipes with holes are used as pipe sheds to be driven into the holes, and are welded into a whole through annular steel bars; single-liquid-slurry and double-liquid-slurry segmented grouting is adopted, and the grouting pressure is controlled; during construction, grout diffusion and stratum deformation are monitored, after surrounding rock consolidation reaches the standard, weak blasting is matched with a small excavator for excavation, and after acceptance inspection is qualified, reinforcing steel bars are bound, formworks are installed, and concrete is poured. Compared with the prior art, the problems of collapse and water gushing of the vertical shaft under the strong weathering and water-rich geology can be solved, and the defects of insufficient supporting strength, grouting uniformity, construction efficiency and long-term stability in the traditional technology are overcome.

The invention relates to the technical field of down-the-hole drill ball tooth drill bit wear measurement, in particular to a down-the-hole drill ball tooth drill bit wear value real-time measurement method and system, and the method comprises the steps: carrying out the optimization and registration of an initial three-dimensional model, and obtaining an overall wear quantized value of a down-the-hole drill ball tooth drill bit; analyzing a mapping relation between the while-drilling parameters and the overall wear quantized value, and constructing a database between the while-drilling parameters and the drill bit wear value; deriving a dimensionless variable according to a dimensional analysis method and a database, and performing combined screening on the dimensionless variable, a second-order polynomial and a cross term to determine a dimensionless variable combination influenced by drill bit wear; and substituting the dimensionless variable combination into the multiple linear regression model to establish a mathematical relationship model between the drill bit wear and the while-drilling parameters, thereby realizing the real-time measurement of the wear value of the ball tooth drill bit of the down-the-hole drill. According to the method, non-dimensional variables of the while-drilling parameters are obtained based on dimensional analysis, the model is built in combination with multiple linear regression, the wear value of the ball tooth drill bit of the down-the-hole drill is measured in real time, and construction efficiency and safety are improved.

This utility model relates to a telescopic down-the-hole drill bit guide device, belonging to the technical field of drill bit auxiliary structures. The telescopic down-the-hole drill bit guide device includes: a guide bushing and a locking mechanism. The guide bushing has a chip removal groove on its side end, and ball bearings staggered with the chip removal groove are embedded in the side end of the guide bushing. The top of the guide bushing has a countersunk hole, and the interior of the guide bushing has a positioning groove communicating with the countersunk hole. The locking mechanism includes a bolt inserted into the countersunk hole, and the side end of the bolt head has an installation cavity communicating with the positioning groove. The locking block and the positioning groove are always positioned on the side of the bolt facing away from the axis of the guide bushing, ensuring that centrifugal force pushes the locking block outward during drill bit rotation, allowing it to penetrate deeper into the positioning groove and enhancing the bolt locking effect. This dynamic self-reinforcing mechanism effectively prevents bolt loosening, eliminating the need for adhesive injection to prevent loosening and removing residual adhesive from the source.

The utility model belongs to the technical field of down-the-hole drills, and discloses a driving device and a down-the-hole drill. The driving device comprises a hydraulic motor and a speed reducer, the speed reducer comprises a shell, a multi-stage planetary gear train structure and an output shaft, the hydraulic motor is arranged outside the shell, the multi-stage planetary gear train structure is arranged in the shell, and the multi-stage planetary gear train structure comprises a plurality of planet rows which are connected in series; a driving shaft of the hydraulic motor is in driving connection with an input piece of the multi-stage planetary gear train structure, and an output piece of the multi-stage planetary gear train structure is in transmission connection with the output shaft. Multi-stage speed reduction and torque increase of the speed reducer are realized through a multi-stage planetary gear train structure, so that the requirements of different working conditions of the down-the-hole drill can be met only by adopting a high-speed and small-displacement motor, the mechanical efficiency of a hydraulic motor is improved, the working oil consumption of the whole machine is reduced, the oil tank capacity of the whole machine is reduced, and the cost of the whole machine is reduced; in addition, the multi-stage planetary gear train structure is compact in overall structure, high in rigidity and high in impact resistance, and the service life of the driving device is prolonged.

The invention discloses a combined down-the-hole drill bit capable of drilling and chambering. The combined down-the-hole drill bit is composed of a tool rest 1, a tool bit 2 and a locking and clamping device 3. The drill bit is installed on the down-the-hole drill, the drill bit locking and clamping device 3 is in the state of locking the tool bit 2, the drill bit has the same function as a common down-the-hole drill bit, a drill rod rotates while drilling in the drilling process, and a round hole 4 is formed in rock or concrete. When the drilling depth reaches the designed depth, the drilling machine is controlled to only drill without rotating, at the moment, the drill bit forms a rectangular pit 41 at the bottom of the hole, and steps 42 are formed on the two sides of the long edge of the rectangular pit. Drilling continues, a trigger bottom cap 321 at the bottom of the drill bit is extruded by a hole bottom step 42, the locking and clamping device 3 is unlocked, and the drill bit tool bit 2 can be unfolded after unlocking. After the machine is stopped and the drill rod is lifted, the drill rod is rotated by an angle, so that the bottom of the tool bit 2 falls on a rectangular hole step 42, a drilling machine is started to only drill without rotating, the drill rod is manually controlled to rotate, and the process is repeated until the step 42 is chiseled away by the tool bit, and then normal drilling operation is carried out. And continuously drilling to form a reaming section to the designed length.

The application relates to the technical field of slope construction, and provides an adjustable support for a down-the-hole drill on a slope. The adjustable support is used for linear drilling operation on an inclined slope surface with continuously changing slope, wherein the fixed frame is a frame structure, effectively reducing the overall weight of the support; at least three sliding legs are vertically detachably arranged on the fixed frame, and each sliding leg is in contact with the slope surface through a sliding cover, effectively increasing the contact area of the support and the slope, evenly distributing the weight of the support, reducing the single-point contact pressure of the support and the slope, and avoiding sinking of the support on the uneven slope; at least three inclined adjustment legs are used for adjusting the inclination of the fixed frame through telescopic movement, the support is adaptively adjusted to the angle of the slope with continuously changing slope, the support can adapt to the continuously changing slope, and the down-the-hole drill arranged on the support can also perform linear drilling on the continuously changing slope, thereby effectively avoiding drilling inclination and improving drilling quality.

The application discloses a kind of equipment for fixing teeth of down-the-hole drill bit, including structural frame, the structural frame is mounted for positioning drill bit tooth fixing tool, tooth fixing alignment feeding mechanism is arranged above tooth fixing tool, and pressure cylinder for pressing alloy tooth into drill bit is matched with tooth fixing alignment feeding mechanism, after the drill bit is fixed on tooth fixing tool, the area of the drill bit to be installed tooth hole is directly above the working area, the structural frame is mounted with rotating mechanism, the rotating mechanism includes vertically arranged rotating shaft and rotating disc coaxially mounted on rotating shaft and rotatable around rotating shaft, a plurality of stations are symmetrically arranged on rotating disc with rotating shaft as center, a type of tooth fixing alignment feeding mechanism is mounted on each station, and rotating disc sends a type of tooth fixing alignment feeding mechanism to the working area every time a station is rotated;The application solves the gap problem between alloy tooth and tooth hole after pressing tooth, and can greatly improve the quality of drill bit tooth fixing, thereby improving the reliability of down-the-hole drill bit.

The invention relates to the technical field of down-the-hole drills, and provides a crawler-type underground down-the-hole drill which comprises a drill main body, the drill main body is provided with a walking assembly, a drilling assembly is arranged on the drill main body, and the crawler-type underground down-the-hole drill further comprises a telescopic arm arranged on the drill main body and used for driving the drilling assembly to move; the first rotary support is arranged at the moving end of the telescopic arm; the second rotary support is arranged at the rotating end of the first rotary support, the rotating end of the second rotary support is connected with the drilling assembly and used for driving the drilling assembly to rotate to adjust the drilling angle, and the rotating axis direction of the second rotary support is perpendicular to the rotating axis direction of the first rotary support. According to the technical scheme, the problem that in the prior art, the transposition punching efficiency is low is solved.

The invention discloses a multi-parameter fusion rock stratum fracture method based on measurement of parameters while drilling of a down-the-hole drill, and relates to the technical field of mining machinery. Comprising the following steps: in the drilling process of a down-the-hole drill, acquiring a measurement-while-drilling parameter, a borehole peeping image and a rock mass acoustic wave velocity; calculating the change rate of adjacent rock stratum structures, and judging the change positions of the rock stratum structures according to standards; respectively calculating local variable coefficients of the axial force and the drilling speed, and constructing a rock mass fracture index by combining the axial force variance, the drilling speed variance and the weight coefficient; and based on the measurement-while-drilling parameters, the borehole peeping image, the rock mass acoustic wave velocity and the rock mass fracture index, a fracture recognition model is constructed, and rock mass integrity judgment is completed by combining a strength judgment module. The method aims at determining the rock stratum fracture according to the real-time while-drilling parameters of the field down-the-hole drill, the drilling parameters in the drilling process can be accurately obtained in real time by means of the developed while-drilling system, the drilling specific energy of the down-the-hole drill is analyzed, and therefore the integrity index of the rock mass is determined.

The application relates to a down-the-hole bit structure which comprises a bit body and a flow control assembly, an air channel and an auxiliary channel are arranged in the bit body, a powder discharge groove communicating with the air channel is arranged at the front end of the bit body, one end of the auxiliary channel communicates with the air channel, and the other end of the auxiliary channel penetrates through the side wall of the bit body and communicates with the outside; the flow control assembly comprises a mounting block, a driving assembly, a reset member and a stopper, the mounting block is fixedly arranged in the auxiliary channel, a main channel is arranged on the mounting block along the length direction of the auxiliary channel, the stopper slides in the mounting block along the length direction perpendicular to the main channel, the driving assembly and the reset member are arranged in the mounting block, the driving assembly is used for driving the stopper to move towards one side of the main channel to limit the speed, and the reset member is used for driving the stopper to move back towards the other side of the main channel. The air flow in the air channel is reduced to normal in the initial drilling period, manual pressure adjustment is not needed, the stability and drilling quality in the initial drilling period are improved, and the drilling operation efficiency is also improved.

The invention relates to the technical field of supporting devices, in particular to a telescopic down-the-hole drill supporting device. In order to solve the problems that a large amount of manpower, material resources and time cost are consumed in the erecting process due to the fact that existing down-the-hole drill operation depends on a scaffold supporting mode and the requirement for scaffold erecting accuracy is extremely high, and the stability and safety of drilling operation are affected due to the fact that erecting deviation easily causes drilling machine installation inclination, the following technical scheme is provided. A top frame is arranged above the bottom frame, a motor is installed on the top frame, the output end of the motor is connected with a down-the-hole drill, and the bottom frame and the top frame are telescopically adjusted to change the overall length of the device; and the connecting assembly is connected to one end of the bottom frame and one end of the top frame. According to the method, excessive dependence on scaffold erection accuracy can be avoided, manpower, material resources and time cost needed by erection are saved, meanwhile, drilling machine installation inclination caused by scaffold erection deviation is avoided, and the stability and safety of drilling operation are guaranteed.

The application discloses a dust collector intelligent control system and method and a down-the-hole drill, wherein the electric control system comprises a dust raising sensor, a motor rotating speed sensor, a power device rotating speed sensor and a controller; the dust raising sensor, the motor rotating speed sensor and the power device rotating speed sensor are electrically connected to the controller respectively; the hydraulic control system comprises a power device, a hydraulic oil tank, a hydraulic pump, a dust collector motor control valve and a dust collector; the hydraulic oil tank is connected to the hydraulic pump, the dust collector motor control valve and the dust collector through hydraulic pipelines respectively; the dust collector motor control valve is connected to the hydraulic pump and the dust collector through hydraulic pipelines respectively. The dust collector intelligent control system can realize the accurate control of the matching between the motor rotating speed and the dust removal effect when the dust collector is working, thereby effectively improving the construction site environment; the dust collector motor brake valve is arranged, the motor can be rapidly braked, and the dust removal efficiency of the filter element of the dust collector can be effectively improved.

This application provides a method, device, medium, and program product for monitoring wear of down-the-hole (DH) drill bits, relating to the field of drill bit wear monitoring technology. The method includes: collecting the same acoustic emission signal received by at least three acoustic emission sensors spaced axially along the drill rod of a DH drill rig during drilling, and recording the reception times of at least three signals for receiving the same acoustic emission signal; determining the actual propagation speed and axial position of the same acoustic emission signal along the drill rod based on the determined target axial spacing between the at least three acoustic emission sensors and the at least three signal reception times; identifying the same acoustic emission signal as a drill bit wear signal when the actual propagation speed is greater than or equal to a preset speed threshold and the axial position of the sound source is within the drill bit's working area; and determining the degree of drill bit wear based on the drill bit wear signal. This solves the technical problem of low accuracy in DH drill bit wear monitoring in related technologies.

This application discloses a method, apparatus, and equipment for determining blasting schemes in open-pit mines, relating to the field of blasting technology. The method includes: acquiring the bench resistance line, ore and rock parameters, and preset constraints corresponding to the target area; generating N sets of candidate blasting schemes based on the bench resistance line, ore and rock parameters, and preset constraints; optimizing the N sets of candidate blasting schemes to obtain M sets of optimized candidate blasting schemes; verifying the M sets of optimized candidate blasting schemes to obtain M sets of evaluation index sets; and selecting P sets of target blasting schemes from the M sets of optimized candidate blasting schemes based on the M sets of evaluation index sets and preset constraints, and sending the P sets of target blasting schemes to the down-the-hole drilling rig control system. According to the embodiments of this application, the accuracy of blasting schemes can be improved.

The invention discloses a down-the-hole drill for a hard rock stratum and a construction method of the down-the-hole drill, and relates to the technical field of down-the-hole drills, the down-the-hole drill comprises a drill bit body, and the drill bit body is provided with a flat part and an annular slope part; a plurality of connecting ports are uniformly formed in the flat part and the annular inclined surface part at intervals, and a rotating groove is formed in the drill bit body; a bearing shaft; a ball tooth; the limiting ring is rotationally connected into the drill bit body; a connecting groove is formed in the drill bit body; the driving part drives the rotating shaft to slide towards the direction of the connecting port, so that when the spherical teeth on one side are aligned with the connecting port, the spherical teeth are driven to protrude out of the connecting port; when the spherical teeth slide into the rotating groove, the control assembly controls the rotating shaft to rotate until the spherical teeth on the side opposite to the connecting port rotate to be aligned with the connecting port; one side, close to the connecting port, of the limiting block is provided with a limiting groove for clamping the spherical teeth; the power assembly drives the limiting block to slide in the direction close to or away from the connecting opening. The drill teeth on the drill bit can be replaced.

The utility model belongs to the technical field of dust collection devices, and provides a dust collection device of a down-the-hole drill, which is used for being installed on a frame body of the down-the-hole drill and comprises a dust collection head, a dust collector and a collection box, and the dust collection head is annular, is used for being arranged at the bottom of the frame body of the down-the-hole drill and is sleeved on the outer side of a drill rod of the down-the-hole drill; an inlet of the dust collector is connected with the dust collection head through a connecting pipe; the collecting box is rotationally connected with the bottom of a frame body of the down-the-hole drill, the dust collector is fixedly arranged on the collecting box, and an outlet of the dust collector communicates with the collecting box. According to the technical scheme, the problem that a large amount of dust is generated in the using process of the down-the-hole drill and cannot be cleaned and collected in time is solved.

The utility model discloses a drill bit for preventing rock slag from blocking a blast hole, which relates to the technical field of drilling of down-the-hole drills and comprises a water injection device inflow pipe, a drill bit body is arranged at the bottom end of the water injection device inflow pipe, a spiral groove is formed in the outer surface of the drill bit body, and a water storage tank is formed in the center of the top end of the drill bit body. A plurality of water outlet holes are formed in the position, penetrating through the water storage tank, of the surface of the spiral groove, and the water outlet holes are used for injecting water to soften rock slag when the rock slag is too hard. Through the water baffle and the pressing head, water cannot be injected into the rock slag when the rock slag encounters softer rock slag, so that argillization is avoided, and smooth slag discharging is kept. And after hard rock slag is encountered, water is automatically injected into the rock slag, so that the effect of softening the rock slag is achieved, and the drilling resistance is reduced.

The invention discloses a rod replacing device of an overhead down-the-hole drill and a rod replacing method of the rod replacing device, and relates to the technical field of drilling machine rod replacing. The rod replacing device comprises a drilling frame, an upper swing frame and a lower swing frame, the surface of the drilling frame is slidably connected with a power head swing mechanism through a sliding guide rail, and two hexagonal sleeves are arranged on the surface of the lower swing frame; a rod dismounting device is fixed to the bottom of the drilling frame, and a main drilling rod is arranged in the drilling frame. According to the rod replacing device of the overhead down-the-hole drill and the rod replacing method of the rod replacing device, an arc-shaped clamping mechanism of an upper swing frame is matched with a thin neck structure of an auxiliary drill rod to form a specific drill rod library type, the structure is simple and reliable, an inner hexagon of a hexagonal sleeve is matched with an outer hexagon outside the lower end of the auxiliary drill rod, and a half of a flat key is clamped in lower steps of the two hexagonal sleeves; half of the auxiliary drill rod is clamped in a key groove of the lower swing frame and can bear torque generated by a connecting and detaching rod, enough wall thickness is reserved between an outer hexagon and an inner hole of the auxiliary drill rod, and the stability and the service life of the auxiliary drill rod structure are not affected.

The invention discloses a downward drilling device capable of automatically processing drilling cuttings, and belongs to the technical field of ground blasting construction, the downward drilling device comprises an advancing mechanism, a vertical propelling mechanism, a drilling cuttings collecting and discharging mechanism and a drilling rod mechanism, a spiral sheet is arranged on the outer side of a rod body of the drilling rod mechanism, a rubber isolating ring sheet is arranged at the end part of the rod body, and a rubber sealing ring is arranged at the end part of an outer cylinder. During drilling, the down-the-hole drill bit is driven by high-pressure gas to crush a rock stratum, and the rubber isolation ring piece and the rubber sealing ring form a dynamically-sealed drilling cutting containing area at the bottom of a hole. The rotating spiral piece pushes the drilling cuttings upwards from the area, and the drilling cuttings pass through an annular channel between the outer barrel and the rod body and are finally continuously discharged to a drilling cutting collecting and discharging mechanism from a slag discharging opening in the top end of the outer barrel. According to the device, closed-loop operation of generating, collecting, transporting and discharging drilling cuttings is achieved in the mode that internal mechanical conveying and pneumatic assistance are combined, the situation that the drilling cuttings remain in a hole and fall back is effectively avoided, and the efficiency of downward deep hole drilling and the hole forming quality are remarkably improved.

The utility model discloses a down -the -hole drill anti -circulation multistage blanking collection device, including one -level filter bin, two -level filter bin and collection cylinder, the top of one -level filter bin is open and shut and is connected with the top cover, and two -level filter bin sets up below one -level filter bin, collection cylinder sets up below two -level filter bin, and the first aperture adjusting unit is arranged between the discharge gate of one -level filter bin and the feed port of two -level filter bin, and the second aperture adjusting unit is arranged between the discharge gate of two -level filter bin and the feed port of collection cylinder, and the open and shut subassembly is arranged between collection cylinder and two -level filter bin, and the utility model discloses the cooperation of one -level filter bin, two -level filter bin and aperture adjusting mechanism, according to actual ore particle size, aperture is adjusted flexibly, realizes accurate multistage screening to different particle size ores, and effectively copes with the ore of various kinds, particle and density difference remarkable in operation, and the adaptability of device to complex working condition is greatly improved.

This utility model relates to the field of environmental protection equipment technology, and in particular to an integrated dust collection and removal device. The integrated dust collection and removal device is installed on a down-the-hole drill rig and includes an air compressor, a dust collection hood with a negative pressure suction pipe, a negative pressure ejector, and a dust collection and filtration water tank. The dust collection hood is located above the dust discharge port at the top of the borehole and is connected to the negative pressure ejector via the negative pressure suction pipe. The inlet end of the negative pressure ejector is connected to the air compressor, and the outlet end is below the liquid level in the dust collection and filtration water tank. The dust collection hood, located above the dust discharge port at the top of the borehole, is connected to the negative pressure ejector via the negative pressure suction pipe. The negative pressure ejector is connected to the dust collection and filtration water tank. The water in the dust collection tank removes airborne dust. The dust collection and filtration water tank is attached to the down-the-hole drill rig and can be moved synchronously with the drilling operation, achieving a portable integrated dust collection and removal system. This saves labor, sprayers, and a large amount of water resources, making it highly practical.

The invention discloses an automatic hole forming control method, device and system for a down-the-hole drill, and belongs to the technical field of engineering machinery. Based on a comparison result of the real-time operation parameters of the drilling machine and a preset threshold value, the working state of the drilling machine is switched; in the automatic rod unloading state, primary judgment whether rod unloading succeeds or not is conducted according to the pressure signal of the shackle oil cylinder and the stroke signal of the shackle oil cylinder, and after the primary judgment is successful, secondary judgment whether rod unloading succeeds or not is conducted according to the reverse pressure signal of the power head, the lifting pressure signal and the position signal of the power head. According to the method, through automatic switching of the state machine based on multi-parameter threshold value comparison, full-process closed-loop control of the down-the-hole drill from initial punching to hole forming completion is achieved, especially through a secondary judgment mechanism in the rod dismounting state, the shackle success rate and operation safety are remarkably improved, and the working efficiency of the down-the-hole drill is improved. The problems that manual operation is low in efficiency, depends on experience and is lagged in response are effectively solved.

The invention discloses a volcanic accumulation layer foundation treatment method. The volcanic accumulation layer foundation treatment method specifically comprises the following steps of construction preparation; measuring and setting out; leveling the down-the-hole drill in place; the down-the-hole drill drills to form a hole to form a first drill hole; shifting the down-the-hole drill; a screw pile drilling machine is in place; a drill rod of the screw pile drilling machine drills downwards along the first drill hole to form a second drill hole; a mixture is injected into the second drill hole, and after the second drill hole is filled with the mixture, the drill rod is pumped and lifted to the earth surface at the specified speed; and the next pile is shifted and constructed. The construction method is applied to subgrade screw pile foundation treatment under the volcanic ash geology, efficient construction can be achieved through the method, the construction effect is good, and the overall method is economical. The method is simple and safe in construction, suitable for foundation treatment, especially for volcanic ash stratum conditions, high in applicability and capable of guaranteeing the construction quality of the screw pile.

This invention discloses a rapid construction method for integrated photovoltaic (PV) pile foundations in high-altitude mountainous areas. The method involves conducting geological surveys of the high-altitude construction area to clarify geological conditions, and determining the pile foundation location, depth, and specifications of embedded parts based on the PV power station design scheme. Using GPS positioning, precise lines are laid out based on the measurement control points transferred by the surveying and design unit, and each pile foundation location is marked. Drilling is then performed using down-the-hole drills or rotary drilling rigs, depending on the geological conditions and pile foundation location markings. The beneficial effects of this invention are: the embedded parts are prefabricated in a factory, with hot-dip galvanized steel pipes welded to the reinforcing cage, significantly reducing the pressure on forest fire prevention in high-altitude mountainous areas, improving the safety of the construction process, and avoiding quality deviations in on-site welding, ensuring the connection strength of the embedded parts; the integrated embedded part design effectively avoids the sinking and displacement problems of the hot-dip galvanized steel pipes due to their own weight during concrete pouring.

The utility model relates to a small down-the-hole drill drilling dust suppression structure which comprises a drilling machine support, a drilling machine assembly for installing a drilling rod is slidably connected to the drilling machine support, a dust cover extends from the front end of the drilling machine support, a water spraying structure is arranged on one side of the drilling machine support and comprises a nozzle arranged in the dust cover in a penetrating mode, and the outer side of the nozzle communicates with a water source. A water supply structure for driving water flow to flow towards the nozzle is arranged between the nozzle and the water source, the water supply structure is in transmission connection with a linkage structure, the linkage structure comprises a clamping jaw and an abutting rolling wheel, the clamping jaw is rotationally connected to the front end of the drilling machine support and arranged on a drilling rod of the drilling machine assembly in a sleeving mode, and the clamping jaw has elasticity and exerts abutting force towards the drilling rod; the abutting rollers are rotationally connected to the clamping jaws in the extending direction of the drill rod. When the drill rod rotates to drive the clamping jaw to rotate, the water supply structure supplies water to the nozzle. The dust suppression structure capable of being matched with the slope drilling machine is arranged, dust generated in the drilling process can be effectively controlled, and the effect of preventing the dust from diffusing is achieved.

A sub-assembly, rock drilling rig and method of absorbing vibrations in rotary and DTH drilling. The sub-assembly is for transmitting torque and axial forces between a rotating head and a drilling tool. There is an axial floating arrangement for providing an allowed limited axial relative movement between coupling elements of the sub-assembly. The arrangement comprises several axial drive pins for transmitting the torque. First ends of the drive pins are mounted immovably and second ends are mounted with clearances, whereby the drive pins can bend under torsional shocks. Thus, the drive pins serve as torsional dampening elements.

The utility model discloses a self-drilling anchor rod construction platform, which comprises a fixed base, the bottom of the lifting assembly is mounted on the fixed base; the lifting platform is connected with the top of the lifting assembly, and the lifting assembly drives the lifting platform to do lifting motion; the self-drilling type anchor rod drilling assembly is installed on the lifting platform, and the construction height of the self-drilling type anchor rod drilling assembly is adjusted by controlling the lifting motion of the lifting platform; the self-drilling type anchor rod drilling assembly comprises a drilling base and a down-the-hole drill, the drilling base is installed on the lifting platform in a pitching adjusting mode, and the down-the-hole drill is fixedly installed on the drilling base. According to the utility model, the lifting of the construction platform can be realized through the lifting assembly, so that the side slope anchor rods at various construction heights can be conveniently drilled; the self-drilling anchor rod drilling base is adjustably mounted on the lifting platform, so that constructors can conveniently adjust the drilling angle according to site construction requirements, and the construction requirements are met.

This invention relates to the field of down-the-hole (DH) drill bit wear measurement technology, specifically a method and system for real-time measurement of DH drill bit wear values. The method involves optimizing and registering an initial three-dimensional model to obtain the overall quantitative wear value of the DH drill bit; analyzing the mapping relationship between drilling parameters and the overall quantitative wear value, and constructing a database of drilling parameters and drill bit wear values; deriving dimensionless variables based on dimensional analysis methods and the database, and combining and filtering these variables with second-order polynomials and cross terms to determine the combination of dimensionless variables affecting drill bit wear; and substituting this combination of dimensionless variables into a multiple linear regression model to establish a mathematical relationship model between drill bit wear and drilling parameters, thereby achieving real-time measurement of the DH drill bit wear value. This invention, based on dimensional analysis to obtain dimensionless variables of drilling parameters and combined with multiple linear regression to construct a model for real-time measurement of DH drill bit wear values, improves construction efficiency and safety.

The invention discloses a down-the-hole drill control method and system for pile foundation hole forming combined with blasting construction, and relates to the field of measurement of ultrasonic waves, sound waves or infrasonic waves, in the method, a sound wave emitter is controlled to emit first detection sound waves, and direct waves and stratum waves are collected; first rock mass acoustic characteristic parameters are calculated, and one or more suggested blasting areas are determined; after millisecond blasting is executed, the down-the-hole drill is driven again, and the sound wave emitter is controlled to emit second detection sound waves; second rock mass acoustic characteristic parameters are obtained through calculation; determining a blasting fracturing weakening area and acoustic characteristic parameters corresponding to the blasting fracturing weakening area; and the controller adjusts at least one working parameter of the down-the-hole drill according to the acoustic characteristic parameters, so that the unit footage energy consumption of the down-the-hole drill in the drilling process is maintained within a preset range. The method is used for improving the window hit rate and the time sequence alignment precision, further improving the footage efficiency, reducing the unit footage energy consumption and the hammer clamping risk, and enhancing the stability of the hole forming quality.