35results about "Hydraulic mining" patented technology

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 present invention relates to a high pressure water jet automatic drilling and cutting collaborative system and method for coal seams, and belongs to the field of coal seam gas control. The system comprises a drilling and cutting collaborative control platform, an automatically regulated slotting pump unit and an automatically regulated drill; the drilling and cutting collaborative control platform comprises a coalbed gas geology management system, a decision analysis system, a drilling and cutting collaborative execution system, a monitoring and feedback system, and an information management and evaluation system; construction operation parameter instructions issued by the drilling and cutting collaborative control platform are executed by the automatically regulated slotting pump unit and the automatically regulated drill; coal seam geological information is recorded by the coalbed gas geology management system, and reasonable drilling and cutting construction parameters are analyzed and formulated by the decision analysis system based on the coal seam geological information. Drilling and cutting collaborative construction, on-site operation construction parameter monitoring, and real-time feedback and adjustment are realized by the drilling and cutting collaborative execution system and the monitoring feedback system according to the operation parameter instructions. Coal seam outburst prevention and control effects in a drilling and cutting collaborative implementation area is evaluated by the information management and evaluation system. The present invention improves safety of on-site operators, and reduces personnel input and labor intensity.

A method for constructing an artificial water-conducting channel through pulse hydraulic fracturing of drainage boreholes in a roof aquifer includes constructing an artificial water-conducting channel in a sandstone fissure aquifer through arrangement of drainage boreholes and pulse hydraulic fracturing, which improves the permeability of dense and intact sandstone rock masses. The artificial water-conducting channel formed through arrangement of drainage boreholes is connected to discontinuous water-bearing areas and water-rich areas, and water from roof sandstone fissures is diverted to the drainage boreholes through the artificial water-conducting channel, thereby achieving effective drainage of the boreholes and expanding a radiation range of single-borehole drainage. The method not only avoids the arrangement of excessive drainage boreholes and significantly improves the drainage efficiency of prospecting and drainage boreholes, but also facilitates advance drainage during the mining process. The method enables effective control of mine water hazards, thereby ensuring safe production of the mine.

A vehicle (6) apparatus for removing material from the seabed is disclosed. The vehicle comprises a first propulsion unit (10) for moving the vehicle vertically and a second propulsion unit (12) for moving the vehicle horizontally. A collection unit (16) removes material from the seabed and a latching mechanism (42) is adapted to be coupled to the riser to allow transport of the removed material to a vessel above the water surface.

The present application belongs to the technical field of coal seam permeability improvement in underground coal mine drilling, and provides a coal seam permeability improvement device and method for low-permeability coal seam in underground coal mine by temperature-variable jet flow, which comprises a jet flow nozzle installed at the outlet of a high-pressure water pipe, the inlet of the high-pressure water pipe being connected with a high-pressure water pump, and the high-pressure water pump being connected with a rapid heater; the jet flow nozzle is further connected with a liquid nitrogen generator through a vacuum heat insulation pipe, the inlet end of the liquid nitrogen generator being connected with a nitrogen generator, the outlet end being connected with the inlet end of a liquid nitrogen storage tank, the outlet of the liquid nitrogen storage tank being connected with a liquid nitrogen tank group, the outlet end of the liquid nitrogen tank group being connected with a cryogenic pump, and the outlet of the cryogenic pump being connected with the jet flow nozzle through a vacuum heat insulation pipe; the device effectively increases the fissure size of the drilling, improves the coal seam permeability, and increases the gas production. Meanwhile, a liquid nitrogen production device is used to directly produce liquid nitrogen, which is low in cost and can be reused. The method is simple and easy to operate, can effectively solve the loss of liquid nitrogen in the transportation process, improve the effect of liquid nitrogen on the coal body, and improve the coal seam permeability improvement effect.

This invention discloses a ore body cutting scanning feedback mechanism, comprising an ore body information acquisition module and a cutting information acquisition module. The ore body information acquisition module is used to collect ore body information of the target ore body, including its material composition and hardness coefficient. The cutting information acquisition module is used to collect cutting data during the ore body cutting process, including target distance, cutting depth, and cutting width. An ore body cutting system and method with the above-mentioned ore body cutting scanning feedback mechanism are also disclosed. This system enables accurate, rapid, and intelligent identification of ore body properties before cutting and real-time feedback during the cutting process, improving the rock-breaking accuracy of abrasive waterjet and reducing ore loss.

The application discloses a kind of comprehensive anti-burst methods suitable for deep high pressure coal rock strata, step one, the stress concentration degree of target coal seam or rock strata is detected, and record;Step two, construction borehole, cut out several slits in borehole;Step three, exit hollow drill rod, discharge electrode connected by cable is placed in the front end of hollow drill rod, and discharge electrode is sent into borehole by hollow drill rod;Step four, utilize hole sealer to carry out hole sealing, carry out hydraulic fracturing;Step five-step seven, complete multiple repeated electric pulse discharge operation;Step eight, test the coal seam or rock strata pressure-relief effect of the technology.This method uses drilling cuttings method, hydraulic slotting, high pressure hydraulic fracturing and high pressure electric pulse comprehensive means, cracks pressure relief to coal rock strata, changes coal rock strata stress state, reduces stress concentration degree, to achieve the purpose of anti-burst, mainly applied in deep coal rock mass tunneling roadway and mining working face containing coal rock mass impact tendency.

The invention discloses a high-low pressure waterway control change-over valve for a hydraulic coal extraction device and a control method. The change-over valve comprises a high-low pressure change-over valve element, a control spring and a sealing assembly. A blind hole structure is arranged at one end of the high-low pressure conversion valve element, a hole opening of the blind hole structure is a water inlet, a low-pressure waterway outlet penetrating in the radial direction is formed in the hole bottom of the blind hole structure, and a limiting boss is arranged at the other end of the high-low pressure conversion valve element. The sealing assembly comprises an end plug, a sealing ring and a rigid fixing sleeve, the rigid fixing sleeve is embedded in the inner wall of the hydraulic coal extraction device body, and the sealing ring is connected to the rigid fixing sleeve in a sleeving mode; and one end of the control spring is sleeved, positioned and propped against the limiting boss, and the other end of the control spring is positioned and propped against the end plug. Through the linkage design of the valve element and the spring, the water pressure change is adjusted through an external device, the high-low pressure switching control process of a water path is achieved, and the problems that an existing switching valve is complex in structure, insensitive in switching and insufficient in sealing performance can be solved.

This utility model discloses a water jet mining device suitable for physical fluidized bed mining, including a mechanical extension arm coal breaking unit, a high-low pressure water circuit control conversion unit, and a positioning and reset unit. The mechanical extension arm coal breaking unit includes a jet support body, a hollow shaft, and a mechanical extension arm. The high-low pressure water circuit control conversion unit includes a high-low pressure conversion valve core, a control spring, and a seal, all coaxially installed within the jet support body. The positioning and reset unit includes a reset torsion spring and a drill pipe connection joint. This water jet mining device suitable for physical fluidized bed mining is small in size, highly mobile, and flexible. Utilizing the mechanical extension arm for borehole enlargement can effectively increase the coal breaking volume and gas extraction concentration per borehole, enabling safe and efficient underground co-mining of coal and gas using fluidized bed technology. It is particularly suitable for coal and gas mining operations in gas-bearing mines.

This invention discloses a deep-sea polymetallic nodule tracked mining vehicle, comprising: a vehicle frame; a tracked walking device located at the bottom of the vehicle frame for driving the mining vehicle to move in a predetermined direction; a hydraulic ore-gathering device located at the front end of the main frame for collecting polymetallic nodules; a storage mechanism located in the middle of the main frame for collecting polymetallic nodules from the seabed and enriching them in the central region of the main frame; and a seabed topography adaptive device located at the front end of the vehicle frame, including a linear electric cylinder, a linear sliding guide rail, a connecting bracket, and a displacement sensor, for receiving information from seabed topography exploration equipment mounted on the hydraulic ore-gathering device and controlling the height of the mineral enrichment device above the seabed. This invention is well-suited for harsh seabed conditions and complex terrain, offering a large collection range, high mining efficiency, and seabed topography adaptive adjustment capabilities, enabling efficient and reliable seabed operations while reducing the damage to the deep-sea environment caused by seabed mining.

The invention relates to the technical field of coal mine geologic structure detection, and discloses an integrated pulsating water injection device for detecting a concealed structure and a use method.The integrated pulsating water injection device comprises a base, a movable frame is arranged on the inner side of the base, a supporting frame is arranged on the left side of the movable frame, and a supporting rod is rotationally connected to the left side of the movable frame; and a spraying hole mechanism is arranged on the left side of the supporting rod and comprises a first inner cavity, the first inner cavity is formed in the right side of the interior of the supporting rod, a second inner cavity is formed in the left side of the interior of the supporting rod, and a water inlet pipe is arranged on the right side of the interior of the first inner cavity. High-flow low-pressure water flow is sprayed out through the pulsating nozzle to conduct large-range cutting, an initial cavity is rapidly constructed, then high-frequency high-pressure pulse jet flow is sprayed out through the reaming nozzle, fatigue failure pressure waves are generated to act on stratum fractures, and therefore according to different operation stages, rapid cave forming and pressure relief are conducted firstly, and then accurate fracturing and permeability increasing are conducted.

The ice particle abrasive jet flow generation system of the present application comprises an ice particle preparation device, a high-pressure water jet device and an ice particle abrasive jet flow control device, the ice particle preparation device comprises an ice particle preparation cavity, a liquid nitrogen injector and a dye water injector, the ice particle abrasive jet flow control device comprises a dynamic monitoring cavity, a camera, a PTU controller and an interactive platform, the ice particle preparation device and the high-pressure water jet device respectively deliver ice particles and high-pressure jet water into the dynamic monitoring cavity, the ice particles and the high-pressure jet water can be mixed, forming ice particle abrasive jet water for deep sea mining, and the ice particles as abrasives can avoid causing pollution of seawater, in addition, after collecting image data through the camera, the optimized YoLo v11 algorithm is introduced for automatic target detection and capture of the ice particles in the abrasive jet flow in the dynamic monitoring cavity, and according to the development of the abrasive jet flow and the evolution process of the ice particles, the flow and pressure of the liquid nitrogen injector and the dye water injector are feedback adjusted to realize precise control of the ice particle abrasive jet flow.

The application relates to a cutting arm and a tunneling machine suitable for limited underground space and a tunneling machine working method, and belongs to the field of tunneling machine equipment.The cutting arm comprises a milling head and a disc cutter, and further comprises: a milling shaft, one end of the milling shaft being connected with the milling head; a first sliding shaft, the first sliding shaft being sleeved outside the milling shaft and being rotationally connected with the milling shaft; a driving assembly, the driving assembly being installed in the first sliding shaft and being used for driving the milling shaft to rotate; a second sliding shaft, the second sliding shaft being slidably sleeved outside the first sliding shaft, and the first sliding shaft drives the milling head to move into the second sliding shaft, the disc cutter being arranged on the second sliding shaft and being located at one end of the second sliding shaft for the first sliding shaft to extend out; a first power unit; a shell; a second power unit; and the cutting arm has the effects of improving rock breaking efficiency, reducing wear of the milling head and the disc cutter, being applicable to different cutting objects and different underground space conditions, and being green and environmentally-friendly in mining.

Methods of hydraulic fracturing a rock mass as part of a method of establishing a block cave mine or extending an existing block cave mine includes (a) drilling a plurality of holes downwardly into the rock mass using drill rig equipment positioned on the ground above a proposed or existing block cave mine; and (b) injecting a hydraulic fracturing fluid into the drilled holes from above-ground hydraulic fracturing equipment and inducing fractures in the rock mass. A hydraulic fracturing equipment installation located above-ground drills a plurality of holes downwardly into the rock mass and injects a hydraulic fracturing fluid into the drilled holes and induces fractures in the rock mass. A non-metallic casing for drilled holes is also disclosed.

The application discloses a regionalized method for improving top coal caving rate based on well up and down combined operation, which comprises the following steps: step one, constructing an accurate three-dimensional geological model of the target coal seam roof; step two, constructing a horizontal directional long borehole along the minimum horizontal principal stress direction of the coal seam roof; step three, performing directional sand blasting and tight cutting in the horizontal directional long borehole; step four, performing fracturing construction on the horizontal directional long borehole by well up and down combination; step five, performing directional sand blasting and tight cutting and fracturing construction on all the horizontal directional long boreholes; and step six, mining the bottom coal, and the reformed top coal naturally falls under the overburden pressure, thereby improving the top coal caving rate. The application can inject high-pressure water into the target top coal through the horizontal directional long borehole of the coal seam roof, when the water pressure reaches the coal rock mass cracking pressure, cracks are generated in the coal seam roof and the top coal and are extended, the integrity of the top coal is damaged, and the purposes of weakening the coal rock mass and improving the top coal caving rate are achieved.

A riser 20 for a deep-sea mining system. The riser 20 comprises a lower end and an upper end. The riser further comprises at least one up pipe 21 for containing a slurry mixture of mined material and

The invention discloses an efficient mining method for segmented pressure relief of a thick coal seam of a coal mine. The efficient mining method specifically comprises the following steps: geological exploration and positioning; performing segmented chambering and pressure relief; different pressure control jet flows are implemented from the outer side to the inner side by the drilling and expanding deep part; enlarging a pressure relief mining area; strengthening a tunneling mine tunnel; and continuing to advance to implement pressure relief mining. The method has the beneficial effects that a continuous pressure relief area can be effectively formed in the thick coal seam through the strategy of hole distribution in the shape of the Chinese character'ba 'and key crushing of the middle coal body; when the drill bit rotates to the outer side, the water pressure is reduced, and excessive disturbance to an excavated area or roadway surrounding rock can be avoided; when the drill bits rotate to the inner side, the water pressure is increased, energy can be concentrated to efficiently crush the coal body between the two drill bits, and the effect of accurately controlling the pressure relief range and strength is achieved; by adopting a pressure relief mining mode of advancing in the Y direction and subsequently moving oppositely in the X direction, the pressure relief area can be expanded in order, blind operation is avoided, and the overall mining efficiency is improved.

This utility model discloses a hydraulic punching processing equipment, belonging to the technical field of hydraulic punching equipment. The structure includes a water supply tank, a connecting pipe, a hydraulic punching control group, and a hydraulic punching device. The device adopts an independently installed structure for the hydraulic punching control group. By separating the control components from the punching execution components, the complexity of the device's debugging process is effectively reduced, and the hydraulic punching-related parameters can be adjusted more conveniently, greatly improving the ease of use of the device. Simultaneously, the device optimizes the structure of the water supply tank by setting up an independent output water pump, thereby more precisely controlling the water flow output from the tank and improving the accuracy of the hydraulic punching.

This invention discloses a method for enhancing permeability in strip coal extraction zones of fractured and soft coal seams. This method utilizes a horizontal well strip coal extraction device for fractured and soft coal seams. The device comprises a front packer, a throttle valve, a rear packer, and a rear nozzle, coaxially connected from front to back. The method involves constructing a horizontal downhole casing in or adjacent to the top or bottom of the fractured and soft coal seam. Perforations are made at intervals on the casing. Two packers are used to isolate a sealed space within the casing, containing perforations, with another perforation located at the rear end of the rear packer. Water flowing from the throttle valve fills the sealed space and then flows into the formation along the perforations. The water then returns to the annulus between the casing and the tubing string through the perforation at the rear end of the rear packer, forming a hydraulic circulation for coal extraction. This invention can create a plastic zone at the designed location in the coal roadway, thereby enhancing permeability and relieving pressure. Combined with negative pressure gas extraction, it achieves multiple benefits, including reducing stress, elasticity, gas content, and pressure in the strip area.

An apparatus or combination of operational equipment for effecting liquid or gas communication to, from or between at least one gas and / or liquid containing source. The at least one source having an upper boundary through which an access well is drilled. The access well extending downwardly to a location within the reservoir. The access well also drilled laterally within the at least one source. The upper boundary being a transition in phase or composition of solids, liquids or gases underground such as a transition between clay and shale. The apparatus or combination of operational equipment including a jetting device for insertion into the access well. The jetting device adapted to jet multiple boreholes from a lateral portion of the access well at multiple radial orientations around the lateral portion relative to a vertical.

This invention discloses an abrasive waterjet nozzle device for assisting deep-sea mining, comprising a mixing chamber, an acceleration chamber, a development chamber, a diffusion chamber, an abrasive inlet pipe, a swirl plate, and a mixer. The mixer includes a shell, a clockwise annular propeller, a counterclockwise annular propeller, and a bipolar counter-rotating mechanism. High-pressure water from the outside directly enters the mixing chamber, while abrasives enter the mixing chamber through the abrasive inlet pipe. The bipolar counter-rotating mechanism drives the clockwise and counterclockwise annular propellers to rotate in different directions, enhancing the mixing degree of the abrasive waterjet. The waterjet then enters the acceleration chamber, where a tapered structure design accelerates the abrasive waterjet, enhancing its crushing capacity. After entering the development and diffusion chambers, the abrasive waterjet undergoes secondary mixing enhancement. Simultaneously, the internal swirl plate forms four rotating outlets, ultimately ejecting four clusters of rotating jets. During mining operations, it exhibits excellent diffusion, mixing, and entrainment performance, reducing environmental disturbance.

The invention relates to the technical field of coal mining, and discloses a coal seam thick and hard roof ground high-pressure rotary jet pressure relief method which comprises the following steps: quantitatively screening a main key layer by using rigidity weight and strength double-control indexes; establishing a jet cutting radius and top plate thickness constraint relation, and planning a multi-horizontal layered and vertically staggered drilling space layout; a top plate is regarded as a clamped beam structure, and the limit span is calculated to determine the axial spacing of the cutting grooves; based on the unit volume crushing energy consumption principle, kinetic parameters of the matched target cutting depth are reversely deduced; the tool is driven by fluid reaction torque generated by the eccentric nozzle, and self-adaptive stable control of the rotating speed is achieved through a viscous damping mechanism. According to the method, through scientific quantitative design and underground self-balancing control, full-thickness precise covering of the huge thick hard roof is achieved, a pressure relief blind area is eliminated, the grooving depth and the rock breaking efficiency under the deep hard rock condition are guaranteed, and the stress transmission path of the goaf suspended roof is effectively cut off.

This invention relates to the field of decorative stone mining technology, and more particularly to a high-efficiency, low-damage mining method for hard stone. The invention provides a high-efficiency, low-damage mining method for hard stone, comprising the following steps: dividing the hard stone mining area into zones and then drilling holes; sequentially applying microwave radiation excitation, high-pressure jet cutting, and carbon dioxide blasting to the hard rock mass in a predetermined fracturing direction. This mining method overcomes the problems of traditional rock explosive blasting, such as difficulty in controlling energy, high risk, large vibration effects, and significant damage to the internal structure of the stone, as well as the severe wear and low production efficiency of wire saws in hard stone mining, thus achieving high-efficiency, low-damage mining of hard stone.

A replacement kit for a work machine, and a method of replacing a hydraulic harness. The replacement kit comprises a replacement kit (100) for a work machine, comprising at least one bundle (1) of hydraulic hoses (2), the bundle comprising at least two hydraulic hoses (2), and connectors (3) for connecting to the work machine at the ends of hydraulic hoses (2). The kit (100) further comprises a support frame (4), comprising releasable attaching means (5) arranged to attach the bundle (1) in the support frame (4) and to keep the bundle (1) in said support frame (4) in a shape that corresponds to the shape of the bundle when attached in the work machine (W).

The application discloses a high and low pressure water simultaneous rotation transmission superhigh pressure double-channel rotary joint, which is characterized by comprising a mounting base, a shell, a rotating shaft and high and low pressure connecting plates, a plurality of radial high and low pressure water inlet interfaces are arranged on the mounting base, a plurality of radial high and low pressure water outlet interfaces are arranged on the high and low pressure connecting plates, a high pressure water channel is arranged at the center of the rotating shaft, a plurality of axial water guide holes are arranged around the rotating shaft, the rotating shaft is positioned in the shell through bearings, and the axial positioning of the rotating shaft is realized through a boss on the rotating shaft and a supporting pad close to one end of the mounting base, and the shell is mounted on the mounting base. The high and low pressure water simultaneous rotation transmission superhigh pressure double-channel rotary joint has the characteristics of small volume, simple structure, high reliability and the like, and meets the conveying needs of high and low pressure water simultaneous rotation transmission and independent channels.

The invention discloses a hydraulic cutting device suitable for metal mine thin vein mining, and relates to the technical field of metal mine thin vein mining. The hydraulic cutting device body comprises a main controller, a thin vein ore rock accurate recognition and control module, an intelligent cutting module, a crawler walking module, a main controller and a thin vein ore rock accurate recognition and separation assembly. Waste water, chippings, grinding materials and the like generated during cutting can be shielded and pulled away from the interior of the housing, the pulled-away materials are conveyed into the separation structure, separation and cleaning are carried out multiple times through centrifugal force, adjustment is carried out through the change of the centrifugal force during separation, the separated grinding materials containing impurities can be washed through part of separated waste water obtained after precipitation, and the separation efficiency is improved. Abrasive and water are purified and recycled, the recycled abrasive and water can be filled into an abrasive bin and a water storage bin on the cutting device in time, and the operation time is prolonged.

This invention relates to the field of coal mining technology and discloses a high-pressure rotary jetting method for depressurizing thick, hard coal seams with topsoil. The method includes: quantitatively screening key layers using stiffness weighting and strength dual-control indicators; establishing a constraint relationship between the jet cutting radius and the top thickness, and planning a multi-level, layered, and vertically staggered borehole layout; treating the top as a fixed-support beam structure and calculating the ultimate span to determine the axial spacing of the cutting grooves; based on the principle of energy consumption per unit volume of crushing, back-calculating the dynamic parameters for matching the target cutting depth; using the fluid reaction torque generated by the eccentric nozzle to drive the tool, and achieving adaptive and stable speed control through a viscous damping mechanism. This invention, through scientific quantitative design and downhole self-balancing control, achieves precise full-thickness coverage of extremely thick, hard topsoil, eliminates depressurization blind spots, ensures cutting depth and rock-breaking efficiency under deep hard rock conditions, and effectively cuts off the stress transmission path of the suspended roof in the goaf.

Apparatus and methods are described for excavating earthen material with millimeter-wave (MMW) radiation or a combination of MMW radiation and mechanical apparatus. The MMW radiation can reduce costs and hazards associated with excavation using mechanical means only and / or explosives. MMW-assisted excavation has significant energy advantages over optical or long-wavelength microwave excavation techniques.

The present invention relates to a high pressure water jet automatic drilling and cutting collaborative system and method for coal seams, and belongs to the field of coal seam gas control. The system comprises a drilling and cutting collaborative control platform, an automatically regulated slotting pump unit and an automatically regulated drill; the drilling and cutting collaborative control platform comprises a coalbed gas geology management system, a decision analysis system, a drilling and cutting collaborative execution system, a monitoring and feedback system, and an information management and evaluation system; construction operation parameter instructions issued by the drilling and cutting collaborative control platform are executed by the automatically regulated slotting pump unit and the automatically regulated drill; coal seam geological information is recorded by the coalbed gas geology management system, and reasonable drilling and cutting construction parameters are analyzed and formulated by the decision analysis system based on the coal seam geological information. Drilling and cutting collaborative construction, on-site operation construction parameter monitoring, and real-time feedback and adjustment are realized by the drilling and cutting collaborative execution system and the monitoring feedback system according to the operation parameter instructions. Coal seam outburst prevention and control effects in a drilling and cutting collaborative implementation area is evaluated by the information management and evaluation system. The present invention improves safety of on-site operators, and reduces personnel input and labor intensity.