744results about "Disloding machines" patented technology

The invention discloses a high gas impact ground pressure mine island working face blasting pre-pressure-relief scour prevention method which comprises the steps that a scour inducing key layer in a top plate above an island working face is determined, a top plate pre-splitting pressure relief roadway with specific construction parameters is arranged in the scour inducing key layer, and by means of the mode, elastic deformation accumulated in the scour inducing key layer can be effectively reduced, and one-time pressure relief can be achieved; then, a plurality of blast holes with specific parameters are constructed from the roof presplitting pressure relief roadway to the inducing key layer, finally, the blast holes are sectioned according to the hole depth and sequentially blasted, energy release of each time of blasting is accurately controlled through sectioned blasting, meanwhile, continuous pressure relief is achieved in time and space through sectioned blasting, and the blasting efficiency is improved. The stress of the inducing key layer is effectively released to realize secondary pressure relief; through mutual cooperation of primary pressure relief of the roof presplitting pressure relief roadway and secondary pressure relief of segmented blasting of the blast hole, the mine roof type impact risk facing high gas, an island working face and mining rock burst is effectively reduced, and subsequent safe mining of the island working face is guaranteed.

The invention aims at providing a microwave-spalling agent in-situ fracturing device and method for mining rock through drilling, and belongs to the technical field of drilling mining. A rectangular waveguide and a circular waveguide are matched with a coaxial inner core to achieve focused radiation, directional initial fractures are generated in a drilled hole according to a preset angle, and the directional initial fractures are fractured; and then a static spalling agent is injected into the initial fracture in a segmented and partial pressure mode, in-situ secondary fracturing is conducted on the basis of the microwave fracturing range by means of the fracture expansion effect brought by expansion pressure, and secondary expansion of the fracture is promoted. And by superposing the fracturing ranges of the microwaves and the spalling agent, a large-area communicated fracture network mainly comprising microwave directional fractures is formed. Finally, on the premise that the fracturing range and effect are guaranteed, the purposes of reducing mining drill holes, increasing the distance between the drill holes and improving the mining efficiency are achieved.

The invention provides a hydraulic fracturing fracture net distribution form near-field monitoring method, which comprises the following steps of: arranging a plurality of roof monitoring holes in roadways on two sides of an underground coal mine working surface, installing electromagnetic signal sensors in each roof monitoring hole and on anchor rods of roadway stoping sides, and constructing a full-space monitoring network covering a hydraulic fracturing layer; a data interpretation processing module of the electromagnetic signal time-shifting imaging analysis system comprises a multi-field coupling mathematical model for analyzing and deducing real-time imaging of electromagnetic signals; in the hydraulic fracturing process, an electromagnetic signal sensor is used for monitoring a current field, an electromagnetic field and an ion diffusion field in the rock mass fracture development and expansion process, a monitoring result is substituted into an electromagnetic signal time-shifting imaging analysis system for calculation and feature value extraction, and the fracture net distribution form is deduced through the feature value. According to the invention, the expansion path of the fracturing fluid in the rock stratum can be monitored in real time, the three-dimensional distribution form of the hydraulic fracturing fracture network can be inverted, and a new technical support is provided for the inspection of the hydraulic fracturing pressure relief effect of the underground coal mine.

The invention discloses a combined well spacing method for a ground vertical well and an underground horizontal well, which comprises the following steps of: determining estimated fracturing information of the vertical well and estimated fracturing information of the horizontal well according to acquired fracturing construction information of a surrounding mine; the width of the to-be-mined working face and the lateral mining-induced fracture range of the mined working face are obtained, vertical well construction information is determined according to the width of the to-be-mined working face, the lateral mining-induced fracture range and vertical well estimated fracturing information, fracturing construction is conducted on the thick and hard roof based on the vertical well construction information, and the vertical well fracturing range of a ground vertical well is obtained; and horizontal well construction information is determined according to the horizontal well estimated fracturing information and the vertical well fracturing range, and fracturing construction is conducted on the impact main control rock stratum based on the horizontal well construction information. According to the combined well spacing method for the ground vertical well and the underground horizontal well, the well spacing scheme that the ground vertical well and the underground horizontal well are matched with each other is adopted, sufficient fracturing and pressure relief can be conducted on a thick and hard top plate, and cooperative prevention and control over rock burst and mine earthquake disasters are achieved.

A method for predicting solid material dislodgement due to explosive blasting, the method including: representing pre-blast solid material with a set of discrete particles, each with a 3D location and one or more mechanical properties of the solid material at that 3D location before the explosive blasting; representing at least one explosive blast with a blast time and a set of explosive particles, each with a 3D blast location in the pre-blast solid material and an initial internal energy; repeatedly, for a plurality of time steps, defining a 3D grid surrounding the discrete particles (e.g., plus two empty grid cells in each direction), and numerically determining / calculating updated velocities and updated 3D locations of the discrete particles based on the mechanical properties and the 3D locations, using the 3D grid; for at least one of the time steps corresponding to the or each blast time, including the explosive particles with the discrete particles to numerically determine the velocities and updated 3D locations of the discrete particles, and numerically determining / calculating the updated velocities and the updated 3D locations at the time steps after the or each blast time using the initial internal energies; and determining post-blast locations of the solid material using the repeatedly updated 3D positions of the discrete particles and the pre- blast solid properties of those discrete particles.

The invention discloses a drilling and cutting head, a drilling and cutting device, a gob-side entry retaining slotting method and a roof cutting pressure relief method, and belongs to the technical field of mine drilling and cutting. The drilling and cutting head comprises a vehicle body, a drilling rod and the drilling and cutting head, and the vehicle body is rotationally provided with a drilling rod conveying driving mechanism through a connecting base and a rotary table; a water cutting system is further installed on the vehicle body. The drilling and cutting head comprises a mounting seat, a plurality of drill bit seats and drill bit blocks, an inner cavity is formed in one end of the mounting seat, and mounting holes are formed in the side wall of the mounting seat; a spray hole is formed in the middle of the spray head. And the end part of the inner cavity of the drilling and cutting head is connected with the head drill rod. Through one device, two operation procedures of drilling and water cutting can be achieved, high efficiency of the gob-side entry retaining slotting method and the top cutting pressure relief method can be achieved, the device cost is effectively reduced, the device can be flexibly and conveniently used in a roadway, the operation efficiency is effectively improved, and the device cost is reduced.

The invention discloses a deep mine rockburst risk grading early warning and active pressure relief system and method, and relates to the technical field of rockburst risk early warning. The system comprises a multi-source parameter sensing module, a risk grading early warning module, an active pressure relief execution module, an intelligent control center module and a data storage and interaction module, wherein the multi-source sensing module comprises a distributed sensor and a mobile inspection robot; risk early warning is divided into four levels, and sensitive features are extracted after data are preprocessed; active pressure relief comprises fixed-point and regional pressure relief equipment; the control center uses a redundant architecture to automatically match a pressure relief scheme; and data storage retains more than or equal to 5 years of data, and multi-system docking is supported. The rock burst early warning accuracy and the pressure relief pertinence are improved, multi-module closed-loop cooperation is achieved, emergency response is efficient, false alarm, missing alarm and pressure relief blindness are reduced, roadway stability and personnel safety are guaranteed, and support is provided for safe and efficient mining of deep mines.

The invention belongs to the field of tunnel construction and the field of deep engineering disaster prevention and control, and provides a hydraulic and microwave combined insensitive hard rock burst prevention and control device which comprises a vehicle-mounted system, a hydraulic fracturing system and a microwave emission system. The hydraulic fracturing system is used for injecting water into the insensitive hard rock drill hole, forming a hydraulic fracturing crack on the circumferential wall surface of the insensitive hard rock drill hole, and then injecting a sensitive mineral proppant to fill the hydraulic fracturing crack; the microwave emission system is used for moving into the insensitive hard rock drill hole for microwave irradiation after the sensitive mineral proppant is injected; according to the method, hydraulic fracturing, microwave fracturing and sensitive mineral filling are combined and applied to fracturing and pressure relief of the insensitive hard rock of the deep tunnel, and due to the fact that sensitive minerals have high dielectric constants and dielectric loss factors, a good temperature rise effect can be shown under microwave irradiation.

The invention discloses a filling mining method based on stage reverse medium-length hole groove broaching, which relates to the technical field of mining, and comprises the following steps: stope structure parameter design, mining preparation engineering construction, cutting engineering, stoping process and filling process are carried out in sequence, the cutting project comprises the steps of cutting courtyard rapid forming, cutting groove broaching and cutting groove rapid penetrating; and the cutting courtyard is rapidly formed by adopting a laser pre-splitting auxiliary blasting process. According to the method, the cutting and groove broaching processes are deeply optimized, so that the overall efficiency of underground mining is remarkably improved. In the cutting courtyard forming stage, the laser presplitting auxiliary blasting technology is introduced, so that the rock integrity is reduced, the blasting energy is more concentrated, the effect is more accurate, the problems of perforation, rock slag squeezing and the like in the traditional process are effectively avoided, the explosive loading amount can be reduced, disturbance of blasting vibration to surrounding rock is reduced, and the blasting quality is improved. And a safer technical support is provided for high-stress ore body mining.

The invention relates to the technical field of mine underground equipment, in particular to crawler-type high-gas coal seam drilling equipment based on a double-channel drill rod, which comprises a walking chassis, the double-channel drill rod, a hydraulic slotting system and a negative pressure deslagging device. Crawler-type composite drilling equipment is provided, process integration is carried out through breakthrough of three core technologies, directional drilling (a diamond drill bit and a spiral groove drill rod), hydraulic slotting and negative pressure deslagging are integrated into single equipment, the working procedure switching time is shortened, synchronous slotting and deslagging operation is achieved through a double-channel drill rod, and the working efficiency is improved. The problems of energy consumption and blockage are solved; and meanwhile, gas accidents are prevented.

The invention discloses a grouting and filling method for a cross-layer area of a coal pillar group in a residual mining area, and relates to the technical field of coal mining, which comprises the following steps of: (1) selecting a key layer; (2) a drill hole is constructed in the key layer, a directional initial crack is formed in the drill hole through frosted water jet cutting, then the two ends of the drill hole are set, and the initial crack is expanded to form a crack network in the mode that high-pressure fluid is injected into a hole sealing section; (3) grouting materials are adopted for conducting segmented grouting construction on the drill holes in the step (2), specifically, firstly, low-viscosity grout is used for filling a crack network formed through fracturing, then medium-viscosity grout is used for filling a coal pillar plastic area influenced by mining, and finally high-viscosity grout added with an accelerating agent is used for filling roof fractured rock mass and goaf and goaf roadways; and (4) after the slurry is solidified, a coal pillar-slurry vein body-overlying strata composite bearing structure is formed. According to the invention, the rock mass cohesive force and overall strength of the re-mining area can be obviously enhanced, and the stability of re-mining roadways and working face surrounding rocks is improved.

The invention discloses a rock burst ultra-deep hole blasting unloading wave absorption coupling prevention method for a steeply inclined coal seam, and belongs to the technical field of coal mining, and the method comprises the following steps: step 1, determining an unloading target rock stratum where a working face top plate and / or bottom plate stress concentration area is located in the steeply inclined coal seam; 2, determining a wave absorbing target rock stratum between the unloading target rock stratum and a roadway on the corresponding side of the working face of the steeply inclined coal seam; 3, arranging a plurality of unloading blast hole groups in the roadway; step 4, arranging a wave absorbing blast hole group at the position where the unloading blast hole group is arranged in the roadway; 5, all the wave absorbing blast holes are detonated, and all the unloading blast holes are detonated; and 6, after blasting is completed, the near-surface surrounding rock of the roadway on the corresponding side subjected to blasting serves as a supporting bearing layer for combined supporting. According to the invention, a three-level cooperative control mechanism of source unloading, propagation weakening and terminal bearing is realized, and steeply inclined coal seam clamping type roof and floor rock burst disasters are prevented fundamentally.

The present invention relates to the technical field of coal mining, in particular to a method for constructing an artificial water guide channel through drainage boreholes in a roof aquifer by means of pulse fracturing. The method involves arranging drainage boreholes and using pulse fracturing to pre-form an artificial water guide channel in a sandstone fracture aquifer through the arranged drainage boreholes, thereby improving the permeability of dense and intact sandstone rock masses; the artificial water guide channel formed by the drainage boreholes in the sandstone fracture aquifer connects discontinuous water-bearing areas and water-rich areas, such that roof sandstone fracture water‌ is guided to the drainage boreholes through the artificial water guide channel, thereby achieving effective drainage of the boreholes and expanding the drainage radiation range of a single borehole. The present invention not only avoids arranging excessive drainage boreholes and remarkably improves the drainage efficiency of exploratory drainage holes, but also achieves an advanced drainage function in a stoping process. By means of the method, mine water disasters can be effectively controlled even under unfordable geological conditions, thereby guaranteeing safe production at mines.

The invention discloses movable ore extraction equipment with a dust falling function, and relates to the technical field of plate type ore extraction, the movable ore extraction equipment comprises a heading machine body, a driving mechanism is mounted on one side of the heading machine body, and a cutting head is fixedly connected to one side of the driving mechanism. The pretreatment device is arranged, a first motor reversely runs, a percussion drill body is far away from ore, at the moment, an expansion cracking device body begins to move towards the direction of the ore, after the expansion cracking device body reaches a designated position, a corresponding hydraulic cylinder is started, the expansion cracking device body is pushed to go deep into a drill hole, then the expansion cracking device body is started, cracks in the ore are expanded through hydraulic pressure, and thus the ore is fractured. And after expansion cracking is completed, the first motor is started again, so that the expansion cracking device body is reset to the initial position, the pretreatment mode effectively reduces the strength of ore, the follow-up operation of the cutting head is smoother, the overall working efficiency of mining equipment is improved, meanwhile, the abrasion of the cutting head is reduced, and the service life of the cutting head is prolonged.

The utility model provides a stone excavation dust-free splitting machine, which belongs to the technical field of mining and stone static blasting equipment and comprises a splitting machine body, a movable cavity is arranged in the middle of the splitting machine body, a hydraulic ejector rod is hermetically communicated with the movable cavity, splitting cavities are distributed at four corners of the splitting machine body, and the splitting cavities are hermetically communicated with the movable cavity. A linkage ejector rod is movably connected to the inner wall of the splitting cavity, a limiting blocking base is fixedly installed at one end of the linkage ejector rod, a stone breaking wedge block tool bit is fixedly installed at one end of the limiting blocking base, a linkage ejector base is fixedly installed at the other end of the linkage ejector rod, a limiting ring is arranged on the other side of the linkage ejector rod, and the outer wall of the linkage ejector rod is sleeved with a reset spring. According to the dustless cleaving machine for stone excavation, a hydraulic ejector rod stretches downwards, a hydraulic rod of the hydraulic ejector rod moves downwards, the hydraulic rod slides into a guide groove and pushes a linkage ejector rod in a cleaving cavity to move outwards, and a stone breaking wedge block tool bit breaks the interior of a drilled hole from top to bottom in four directions.

The debris flow prevention and control method comprises the following steps that mining area information and mine geological information are obtained, and according to the mining area information and the mine geological information, the earth surface rock mass movement range influenced by caving mining is determined; according to the earth surface rock mass moving range, a grouting area covering the earth surface rock mass moving range is determined; and grouting hole information is determined according to the grouting area, and drilling and grouting operation is carried out according to the grouting hole information. According to the debris flow prevention and control method suitable for caving mining, source control can be conducted on the material source of the underground debris flow, and therefore the underground debris flow of a mine is prevented.

The utility model provides a coal mine underground package static crushing agent rapid filling device which comprises a supporting base, a shell is fixedly connected to the top of the supporting base, a guide sleeve is movably connected to an inner cavity of the shell, and the guide sleeve is driven in the shell through a driving mechanism. The bottom end of the guide sleeve is closed, the top of the guide sleeve is open, a supporting plate is arranged at the top end of the guide sleeve, and a hydraulic rod is installed in the guide sleeve. Static crushing agent cartridges are fed into the guide sleeve, the guide sleeve extends out of the top end of the shell through the driving mechanism and is inserted into a hole opening for guiding, then the output end of the control hydraulic rod is started to extend, the cartridges are pushed to be upwards filled into the top end of a drilled hole, and high-position manual hole and stick filling is replaced; the hydraulic rod adopts the multi-stage telescopic rod design, the crushing agent cartridge is automatically and accurately fed into the top end position of a drill hole, stable filling of the static crushing agent cartridge is achieved, use is convenient, operation is easy, and the agent filling efficiency is improved.

The invention discloses an impacting-splitting-cutting composite rock breaking configuration of a cantilever type heading machine, relates to the field of coal mine underground heading equipment, and solves the problems of low efficiency, serious cutting pick abrasion, poor stability and insufficient adaptability of an existing heading machine during hard rock operation. A multi-stage cylinder executing mechanism is arranged on a cutting arm of the heading machine, an angle adjusting rotary table is arranged at the upper end of the multi-stage cylinder executing mechanism, and a breaking hammer and a rock cracking machine are arranged on the angle adjusting rotary table; the angle adjusting rotary table comprises a track plate and a rotary table, and the rotary table drives the track plate to rotate; a breaking hammer is arranged at one end of the track plate, and a rock cracking machine is arranged at the other end. The breaking hammer and the rock cracking machine are integrated at the front end of the heading machine, pre-broken rock can be split, the number of times of breaking is reduced, vibration and noise caused by repeated breaking are avoided, the internal stress of a rock stratum is damaged by additionally arranging the rock cracking machine, other work of the whole machine is not affected, and the service life of the heading machine is not affected.

The invention relates to a device for pre-damaging rock, comprising at least one microwave generator and at least one antenna unit (200) for introducing the microwaves into the rock (140), said antenna unit being connected to the at least one microwave generator (240) in a wave-conducting manner, wherein the microwave generator (240) is designed to generate microwaves having at least one wavelength, and the antenna unit (200) has at least two antennas (210). According to the invention, the at least two antennas (210) are arranged at an antenna distance (d) from one another such that the microwaves are constructively superimposed in the rock (140) such that at least one main power lobe (220) is formed in the rock (140) with the superimposition of the emitted microwaves, wherein the antenna distance (d) is dependent on the wavelength of the microwave generated by the microwave generator (240) in that the antenna distance (d) = m * the generated wavelength.

The invention relates to a rock stratum displacement monitoring method, device and system based on a multipoint displacement meter. The method comprises the following steps: obtaining preset measuring point distribution data by responding to fracturing operation, which is completed by utilizing a ground fracturing well, on a target weakening area corresponding to a goaf; based on the measuring point distribution information, drilling equipment is controlled to drill holes in the casing pipe, and a plurality of drill holes matched with the measuring point distribution information are obtained; each sensor node in the plurality of sensor nodes is connected with the signal receiver; aiming at each sensor node, mounting the sensor node into the corresponding drill hole; and acquiring monitoring data sent by each sensor node in real time by using the signal receiver, and determining the displacement monitoring information of the rock stratum based on the monitoring data. According to the scheme, the comprehensiveness and accuracy of rock stratum displacement monitoring are improved.

The invention relates to a hydraulic slotting and fracturing integrated collaborative operation system, and belongs to the technical field of coal mining. The system comprises a multi-parameter three-dimensional monitoring module, a multi-mode cooperative control module, a hydraulic fracturing module and a hydraulic slotting module. The multi-parameter three-dimensional monitoring module is used for carrying out crack three-dimensional modeling, stress field dynamic tracking and gas component real-time analysis; the multi-mode cooperative control module analyzes the geological exploration data output by the multi-parameter three-dimensional monitoring module to obtain geological parameters, and generates an operation scheme according to the geological parameters; and the hydraulic fracturing module and the hydraulic slotting module cooperatively work under the control of the multi-mode cooperative control module. Through the integrated collaborative design of hydraulic slotting and fracturing, the limitation of a single process is broken through, the construction efficiency and uniformity of a crack network are improved, the stability and coverage range of a gas extraction channel are improved, and a full-process intelligent solution is provided for safe and efficient mining of a complex coal seam.

The invention discloses a fracturing control method for tunneling roadway surrounding rocks in a near-distance coal seam excavation working area, which comprises the following steps of: calculating a working area stress superposition influence range when near-distance coal seam excavation is performed oppositely, and arranging fracturing drill holes to carry out fracturing stress transfer on a top plate and an interlayer hard rock stratum in the excavation working area. In the excavation drift stress superposition influence range, an overlying hard roof is cut off through fracturing of an upper coal seam working face mining roadway, the weighting step pitch and weighting strength of roof fracture are reduced, and the mining-induced stress transmitted to a lower coal seam tunneling roadway is reduced; the interlayer hard rock stratum is fractured and cut off in the lower coal seam track high drainage roadway to block stress transfer, mining-induced stress superposition of upper coal seam working face stoping and lower coal seam roadway tunneling is weakened, and the stress concentration degree of a mining drift area is reduced. According to the method, the influence of mining-induced stress superposition in a near-distance coal seam mining intersection area on lower coal seam roadway tunneling and upper coal seam working face mining roadway is reduced, and normal mining of an upper coal seam working face and normal tunneling of a lower coal seam working face roadway are guaranteed.

The invention concerns a blasting system (1) configured for explosive material charging in a borehole (3). The system (1) comprises a detonator support device (5) configured to be inserted into the borehole (3) by means of a charging hose (7); a main body (9) of the detonator support device (5) comprises a channel (8) oriented along a main body centre line (CL) extending along the borehole extension during said explosive material charging; an openable cover device (14) covering the channel (8) is configured to come into contact with the charging hose (7) in motion for pushing the main body (9) along the borehole (3), wherein the charging hose (7) in motion is configured to open the openable cover device (14) whilst a stopping arrangement (13) stops the main body (9).The invention also concerns a method of explosive material charging in a borehole (3) by means of the blasting system (1).

A method and a system for multistage pulse hydraulic fracturing in directional long drilling of coal and rock seams in underground mines are provided, which can perform multistage pulse hydraulic fracturing in directional long drilling of the coal and rock seams, thereby effectively solving the problem of uneven distribution of fractures caused by overall fracturing of long drilling, and the problem of fractures being “dense outside and sparse inside.” Further, a pressure of high-frequency pulse water in each stage induces fatigue damage to a coal-rock body, such that multi-directional hydraulic fractures that are not controlled by a crustal stress are formed, native fractures in the coal and rock seams are activated to form a fractures network. The pulse fractures network in each stage is expanded and connected, and an interconnected dense fractures network with uniform distribution of fractures is then formed in the directional long drilling.”

The application discloses a coal rock anti-burst method of large-range seam forming by remote controllable shock wave and hydraulic fracturing, and comprises the following steps: step one, detecting and recording the stress concentration degree of target coal seam or rock stratum; step two, drilling; step three, withdrawing the hollow drill rod, arranging the discharge electrode connected with the cable at the front end of the hollow drill rod, and sending the discharge electrode into the drill hole through the hollow drill rod; step four, sealing the hole by using a hole sealer and performing hydraulic fracturing; steps five to seven, completing multiple repeated electric pulse discharge operations; and step eight, testing the pressure relief effect of the coal seam or rock stratum. The method uses the drilling cuttings method, high-pressure hydraulic fracturing and high-voltage electric pulse to perform large-range cracking and pressure relief on the coal rock stratum, changes the stress state of the coal rock stratum, and reduces the stress concentration degree, so that the anti-burst purpose is achieved. The method is mainly applied to deep coal rock body tunneling roadways and coal mining working faces containing coal rock body impact tendency.

The invention relates to the technical field of hydraulic fracturing, in particular to a drilling, sealing and fracturing integrated hydraulic fracturing device for a directional drilling machine. The high-low pressure switching mechanism in the device can achieve the functions of low-pressure passing and high-pressure sealing, and a good guarantee foundation is provided for hydraulic fracturing operation. When the device is used, under the condition of low-pressure water, the piston core cannot completely compress the first spring, at the moment, the high-pressure and low-pressure switching mechanism in the device is in an access state, and the low-pressure water is introduced to the position of a drill bit to assist drilling. When hole sealing and fracturing operation is carried out, high-pressure water is introduced into the hollow drill rod, the piston core is gradually pressed by the high-pressure water, the first channel and the second channel are disconnected from each other, and the high-low pressure switching mechanism is in a closed state; high-pressure water is introduced into the hole sealing and fracturing mechanism and is sprayed out of the fracturing hole in a high-pressure state, so that the hydraulic fracturing effect is achieved; in other words, the device can achieve integrated operation of drilling, sealing and pressing, and the construction efficiency is greatly improved.

The invention belongs to the technical field of overlying strata directional presplitting, and particularly discloses and provides a fully mechanized caving face peripheral overlying strata directional presplitting analysis method which comprises the steps that a benchmark presplitting path is generated by building a three-dimensional geologic model, initial drilling points are arranged, and near, middle and far influence areas are divided; pre-splitting is simulated, mechanical parameters are collected to judge whether overlying strata weakening reaches the standard or not, for substandard path sections, drilling point coordinates are optimized, paths are reconstructed, after repeated optimization is conducted till all areas reach the standard, drilling azimuth angles and inclination angles are determined, and finally directional pre-splitting is executed; according to the method, the three-dimensional geologic model is constructed to generate the reference pre-splitting path, the drilling points are arranged, the path is analyzed and optimized in combination with three-level regional mechanical parameters, the problems that the path is not matched with geological conditions and coverage is incomplete are solved, meanwhile, the drilling parameters are accurately matched with the target region by dynamically adapting the azimuth angle and optimizing the dip angle, and the accuracy of the drilling is improved. And efficient release of pre-splitting energy is ensured, and the directional pre-splitting precision and efficiency are improved.

A splitting machine wedge block set with double lubrication comprises a middle wedge block, side wedge blocks and a wedge block installation base, the rear end of the wedge block installation base is connected with a guide cylinder, a lubrication cavity is formed in the rear end of the wedge block installation base, an oil sealing rubber block and a spring are arranged in the lubrication cavity, the lubrication cavity is sealed by a gland plate, and a lubricating grease filling port is formed in the side wall of the guide cylinder. Lubricating grease in the guide cylinder can lubricate the surface of the middle wedge block on the inner side of the guide cylinder, lubricating oil channels composed of main oil channels, oil inlet holes and oil outlet holes are formed in the inner sides of the two side wedge blocks respectively, and the main oil channels are formed by extending from the rear ends of the interiors of the side wedge blocks to the front ends of the interiors of the side wedge blocks. The oil inlet hole extends inwards from the outer wall surface of the rear end of the side wedge block to be communicated with the rear end of the main oil duct, the multiple oil outlet holes extend outwards from the inner side surface of the side wedge block to be communicated with the main oil duct, and the oil supply pipe can inject lubricating grease into the oil inlet hole. By adopting the structure, the inner side of the wedge block mounting seat, the middle wedge block and the side wedge blocks are always automatically lubricated by the lubricating grease, so that the service life of the wedge block group can be greatly prolonged.

The invention discloses a technological parameter optimization method for electric pulse rock breaking. The method comprises the steps that electric tree characteristic parameters under different technological parameters are obtained; establishing a process parameter prediction model by taking the process parameters as input and the electrical tree characteristic parameters as output; based on a process parameter prediction model, an improved NSGA-2 multi-objective optimization algorithm is utilized to optimize process parameters, and the process comprises the following steps: providing a selection, intersection and variation process fusing a tabu search thought, namely, in a filial generation population generation process, a process of generating a filial generation population is provided; a solution with better fitness than a parent and a suboptimal solution within the number limit of flouting criteria serve as offspring solutions and are added into a taboo table, repeated acquisition is avoided, the local search ability of the algorithm is enhanced, a crowding degree value calculation method is improved based on the super-lattice thought to complete offspring population selection and construction, and the global search ability of the algorithm is improved. According to the method, the technological parameters are optimized through the improved NSGA-2 multi-objective optimization algorithm, the optimal technological parameter combination can be obtained, and the rock breaking efficiency is improved.

The invention provides a rock mining method, and belongs to the field of rock mining. Comprising the following steps that S100, a soil layer is cleared and transported, the soil layer covered by a rock stratum is cleared and transported, and a protection device is arranged; step S200, performing carbon dioxide phase change fracturing crushing: performing carbon dioxide phase change fracturing crushing on the rock according to a first rule to form a plurality of phase change fracturing steps, and performing carbon dioxide phase change fracturing crushing on the plurality of phase change fracturing steps according to a second rule; s300, rock clearing and transporting, wherein the crushed rock is cleared and transported; and S400, rock mining is completed. The rock mining method aims at solving the problems that in the prior art, a rock mining method is low in mining efficiency and poor in safety. The device has the technical effects that the safety is guaranteed while the mining efficiency is improved while excessive mining and waste of rocks are avoided.