Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Hiro

5360results about "Underground mining" patented technology

Artificial soil and method for land reclamation by aid of gold mine tailing slag backfill exploitation regions

The invention provides artificial soil and a method for land reclamation by the aid of gold mine tailing slag backfill exploitation regions. The method includes carrying out filling and compaction onthe tailing waste slag backfill exploitation regions; uniformly mixing various components of the optimally designed artificial soil with one another and ultimately covering tailing waste slag backfillsurfaces with the novel artificial soil with a certain thickness so as to effectively treat mine tailing. The artificial soil and the method have the advantages that the prepared artificial soil contains abundant nutrient components, the contents of organic matters can be increased, the gas permeability of the soil can be improved, and the artificial soil is excellent in water retention capacityand fertilizer preservation capability and suitable for growth of plants; organic thoroughly decomposed substances come from agricultural and forestry waste, are extensive in source and are easily available, accordingly, solid waste can be comprehensively utilized in a 'reduction, resource utilization and harmlessness' manner, and the artificial soil and the method conform to principles of circular economy; the land occupation problems of tailing ponds and the problems in the aspect of tasks of land reclamation of mined-out regions can be simultaneously solved by the aid of the artificial soiland the method, and the artificial soil and the method have large market spaces.
Owner:杰瑞(莱州)矿山治理有限公司

Sublevel shrinkage caving stage open stope afterwards filling mining method

The invention discloses a sublevel shrinkage caving stage open afterwards filling mining method. In the earlier stage of stoping, caved ores are utilized to support surrounding rocks on a top tray, and in the later stage of stoping, a goaf area is filled with fillers to control ground pressure so as to achieve safe and efficient mining. Ore blocks are mined in two steps, mining blocks in step two are stoped after the mining blocks in step one are stoped and filled. After the ores are completely let out, the goaf area is filled with the fillers to control the ground pressure. Because the stoping modes of sublevel ore caving, sublevel shrinkage, final ore drawing and empty area afterwards filling are adopted, the mining method has large one-time filling amount and low cost; the method adopts middle-deep hole drilling and blasting and carry scraper ore removal, and the device has high level and large production capacity; the method has the advantages of large production capacity of the sublevel caving method and the stage open stope method, high recovery rate of the filling method, and earth surface protection; the safety is good, and drilling, ore removal and other operations are all carried out in a sublevel drilling and ore removal approach roadway; and the ores can be removed in advance, and the ores can be removed partially after the first sublevel is ready.
Owner:NORTHEASTERN UNIV +1

Automated excavation machine

InactiveUS7695071B2Efficiently and effectively excavatingUnderground miningSlitting machinesActuatorExcavator
The present invention is directed to an excavator that is operable in manual and automatic modes and uses state machines to effect unit operations, rotationally offset swing actuators to rotate boom and cutter head, a fail safe hydraulic system to maintain gripper pressure in the event of a malfunction of the hydraulic system, differing position and pressure control functions in the hydraulic actuators, a kinematic module to effect pitch and roll adjustments, a cutting face profile generator to generate a profile of the excavation face, and an optimization module to realize a high degree of optimization of excavator operation.
Owner:MIN OF NATURAL RESOURCES CANADA

Plasma channel drilling process

Material is removed from a body of material, e.g. to create a bore hole, by plasma channel drilling. High voltage, high energy, rapid rise time electrical pulses are delivered many times per second to an electrode assembly in contact with the material body to generate therein elongate plasma channels which expand rapidly following electrical breakdown of the material causing the material to fracture and fragment.
Owner:STRATHCLYDE UNIV OF

Upward and downward staged rock drilling, sublevel bottom cutting and ore removal subsequent backfilling mining method

The invention provides an upward and downward staged rock drilling, sublevel bottom cutting and ore removal subsequent backfilling mining method. The method includes the following steps that panels are divided in the ore direction, a stope preparation system is arranged, upward fan-shaped medium-depth blast holes are drilled from one side to the other side of a chamber, the blast holes are filled with explosives for detonation, and an undercut space is formed after detonation; cut grooves are formed through a VCR method, and as for ore above the undercut space, downward vertical deep holes are drilled in a drilling chamber at the top of the chamber, and the holes are filled with explosives for detonation with the cut grooves as a compensation space; the chamber in each panel is subjected to two-step backstoping, after ore removal of a first-step chamber is finished, the first-step chamber is filled with cementing materials, after the first-step chamber is filled and cured, a second-step chamber is subjected to backstoping, the backstoping steps of the second-step chamber are the same as those of the first-step chamber, and the second-step chamber is filled with cemented filling bodies and non-cemented filling bodies; and the steps are repeated in this way till backstoping of all chambers are completed. The upward and downward staged rock drilling, sublevel bottom cutting and ore removal subsequent backfilling mining method has the advantages that the rock drilling efficiency of the upward fan-shaped medium-depth blast holes is improved, the waste hole rate is lowered, efficient and safe bottom ore removal is achieved, and the mechanization level is high.
Owner:MCC NORTH (DALIAN) ENG TECH CO LTD

Medium thick heavy-pitch crushed ore body frame type artificial top downward segmenting cemented filling method

The invention discloses a medium thick heavy-pitch crushed ore body frame type artificial top downward segmenting cemented filling method which comprises the following steps: dividing chamber jambs along the trend of an ore body; adopting a rail-less mining aligning system; pre-constructing a high-strength reinforced concrete artificial top in a segmented drilling lane; adopting a stoping sequence from up to down; performing drilling and blasting ore removal on the ore body through the segmented drilling lane at bottom; adopting medium-length hole drilling and remotely controlling a scraper to discharge ore; after finishing the mining of the chamber, utilizing concrete tailings to perform cemented filling; after finishing the mining of the jambs, utilizing concrete tailings or pure tailings to perform cemented filling; after completely stoping the mine chamber in the frame under the protection of the concrete artificial top, starting to stope the jamb adjacent to the segment, and meanwhile stoping the corresponding mine chamber in the frame of the next segment, and then stoping the corresponding jamb of the next segment; and after completely mining the chamber jamb in the middle segment, immediately turning towards the lower middle segment for stoping. The method provided by the invention has the advantages that the safety for mining the heavy-pitch medium thick crushed or ultra-crushed ore body is high, the resource depletion loss rate is low, the mechanical degree is high, the production capacity is high, and the like.
Owner:CENT SOUTH UNIV +1

Efficient mining method for thick metal ore body in slanting

The invention relates to an efficient mining method for a thick metal ore body in slanting, comprising the following mining steps: constructing a transportation roadway outside a dike, constructing flat roadways for rock drilling by sections, constructing a cutting roadway, constructing a cutting well, constructing a cutting groove and reserving a temporary triangular ore pillar, constructing a trench, constructing a sector medium-deep hole and implementing blasting and ore removal, and recovering residual ore. The method realizes safe and efficient recovering of metal ore bodies with the inclination of 30 to 55 degrees and the average thickness of 4 to 15m by adopting a medium-deep hole blasting ore dropping valve under the circumstance without a filling condition, thereby further improving the mining recovery rate and the mining efficiency.
Owner:SHANDONG GOLD MINING LINGLONG

House pillar changeable panel upward demix filling mining method

The invention discloses a house pillar changeable panel upward demix filling mining method. An ore body is divided into an ore house and an ore pillar arranged at intervals along the strike direction; a plurality of house pillars form a panel; a rock trackless preparation system is adopted and comprises a ramp, a rock slice drift, a demix ventilation connection and a rock concentrated ore removal winze; the mechanical upward demix filling mining method is adopted for mining, which mines a slice and fills the slice until the position required by the lower slice blasting compensation is reached. The backstopping order of the house pillars in the panel is the ore house first and then the ore pillar; all ore houses are subjected to upward backstopping at the same time; after a backstopping unit of the ore house is finished, the roof-contacted filling is carried out, and the mining of the ore house is temporarily stopped and the mining of the ore pillar is started; after two backstopping units of the ore pillar are finished, the roof-contacted filling is carried out, and the mining of the ore house is resumed; the abovementioned steps are repeated until the backstopping of the ore block is completed. The invention has the remarkable characteristics of improving the backstopping safety, reducing the resource dilution rate, lowering the support cost, increasing the enterprise profit, and the like.
Owner:CENT SOUTH UNIV +1

Coal mining solid filling method

A coal mining solid filling method comprises following steps: using the stacked solids on the ground as the filling materials for the working surface goaf, directly putting the solid filling materials from the ground to a belt conveyor in the underworkings by a perpendicular feeding well, transporting to the end of a coal face through the underground belt conveyor, reloading the solid filling materials to a solid filling mining conveyor hung under a back tail beam of a self-impacting type filling hydraulic support by a self-moving type filling material reloading machine. In the process of mining work, the coal is mined and the filling materials are filled on the bottom; and the solid filling materials are compacted by means of a compactor of the self-impacting type filling hydraulic support. The method solves the problem of coal compaction under the building and low coal recovery.
Owner:CHINA UNIV OF MINING & TECH +1

Method for extracting gas from high gas low permeability coal seam by punching, slotting, pressure releasing, and permeability increasing

The invention discloses a method for extracting gas from high gas low permeability coal seam by punching, slotting, pressure releasing and permeability increasing, comprising the following steps: whena drill is drilled into a predetermined position of the coal seam, coal bodies at both sides of a drill hole are cut in the drill hole by high pressure water jet with a certain pressure and flow; a flat slot is formed at both sides of the drill hole; the cut coal bodies is led out the hole by the high pressure water jet. The exposed area of the coal body at the slotted part in the drill hole aregreatly increased, namely that an extremely thin protective layer is exploited with local scope of the flat slot, which enlarges effective influential range of pressure releasing, permeability increasing and gas discharging of the coal bodies in the drill hole, thus the air permeability of the coal bodies is increased about 200-300 times, the average amount of single-hole gas extraction reaches 0.3m<3>/min, the concentration of the gas extraction is 30-60%, gas drainage rate of working face of coal extraction is more than 50%, the number of drill holes for gas drainage is reduced by 10-20% after slotting, pressure releasing and permeability increasing. The method realizes the safety, high efficiency and uniform extraction of the gas from the high gas low permeability outburst coal seam, and changes high gas coal seam with outburst danger into low gas coal seam without outburst danger.
Owner:CHINA UNIV OF MINING & TECH

Borehole mining tool

InactiveUS6460936B1SurveyDisloding machinesInterference fitBorehole mining
A borehole mining tool comprising a drill string having an inner pipe column and an outer pipe column. Water is forced under high pressure down an annulus between the outer pipe and inner pipe. A hydromonitor is attached to the end of the drill string. A nozzle in the hydromonitor directs the pressurized water into a stope or work area, thereby loosening the material to be mined. The slurry is educted from the mined area by the action of a venturi attached downstream of the hydromonitor. Water flow through the venturi creates a vacuum which draws the pregnant slurry from the work area up through the inner pipe to the surface. A plurality of tools may be attached to the hydromonitor by a connection comprising a gasket having an interference fit. The gasket allows quick connection and removal of a plurality of tools from the hydromonitor. A radar is include to provide an image of the stope being worked.
Owner:BOREHOLE MINING INT

Continuous mining method of stepped sectional extruding and ore caving followed by filling

In the continuous mining method, ore body are divided into sections, subsections and mini-sections stepwisely along the ore vein; arranging mini-section drilling mine tunnels along the ore vein in the ore body bottom wall and connecting the mini-section tunnels with the main ramp way via linking tunnel; arranging support and filling tunnel along ore vein in the upper wall in the ore section; stoping from two ends to the central part of the bordroom via stepped continuous advance; drilling fanned holes with rock drill machine, breaking ore with rock explosive, charging with charging machine and combined elementary error detonation; filling finished stope via filling tunnel and filling dewatering device; and supporting crushed upper wall roof with deep anchor rod and steel fiber concrete. The present invention has high production capacity, high safety, less ore loss and low mining cost.
Owner:CENT SOUTH UNIV

Sublevel open-stop and delayed filling mining method

InactiveCN102562065AImprove drilling positioning accuracyNo lossUnderground miningSurface miningTailings damFilling materials
The invention relates to a sublevel open-stop and delayed filling mining method. According to the method, cutting crosscuts are wholly undercut along the width of chambers and pillars so that the space of scope rock drilling is shared with ore drawing, drilling operations of vertical parallel blast holes are achieved in undercutting space, positioning accuracy of drilling the vertical parallel blast holes is high, the intervals among the blast holes are even, and the defect of high blasting boulder yield caused by drilling sector blast holes in traditional rock drilling cross cuts is avoided; during chamber (or pillar) scoping, driving of ore drawing gateways and ore drawing admission passages in fill materials of adjacent pillars (or chambers) isn't needed, and accordingly the safety is improved; simultaneously, ores are directly drawn from the undercutting space of the chambers and the pillars, the space of ore drawing is large, mutual interference is small, ore drawing efficiency is high, and ores are drawn completely without any dead space and secondary ore loss; artificial sill pillars are constructed, ore sill plates aren't needed to be reserved, the ores are free of primary loss, and the rate of resource recycling is high. Barren rocks and ore beneficiation tailings are used for filling gobs, the barren rocks are not taken out of pits, constructions of tailing dams and barren rock yards are reduced, and land occupation is small.
Owner:UNIV OF SCI & TECH BEIJING

Method and system for regulating movemnet of an autonomous entity between zones

A method is described of regulating movement of an autonomous entity between a first zone (904) and a second zone (901), wherein the first and second zones each have an operation-defined geographical boundary within a defined geographical region. The autonomous entity is instructed to move into a transition zone (906, 907) that spans the first zone and the second zone, wherein the autonomous entity while located in the first zone is responsive to supervisory control of a first controller (912) associated with the first zone. The autonomous entity is registered with a second controller (910) associated with the second zone to enable the autonomous entity to respond to supervisory control of the second controller as the autonomous entity enters the second zone through the transition zone. The autonomous entity is de-registered from the first controller.
Owner:TECHNOLOGICAL RESOURCES +1

Intelligent full automatic combine coal mining system

The invention relates to an intelligent type full-automatic combined coal mining system, which comprises a coal mining and loading device, a conveying device, a supporting device, and an equipment train, and is mounted in the working face and crossheading in the coal mine well. The coal mining and loading device is mounted on the conveying device, the coal conveying port of the conveying device is conveyed to the outside of the well or the coal bunker through a belt type conveyor in the crossheading, the supporting device is arranged behind the conveying device for supporting the top plate of the coal seam and linking with the conveying device, the equipment train comprises a central control chamber of a central control equipment, a starter, a power device, and a lifesaving cabin, the central control equipment monitors and controls the coordination operation of the devices, the equipment train, and the power device of the equipment train, the power device provide power source for the devices and the equipment train, and the equipment train moves freely in the crossheading with the feeding of the working faces. The invention improves system complete ability and execution efficiency, and has strong function, high intelligent degree, high safety, high production efficiency, and the like.
Owner:SANY HEAVY EQUIP

House pillar type cutting and filling method of medium coal seam for controlling movement deformation of overlying rock

The invention belongs to the field of coal cutting and filling, in particular to a house pillar type cutting and filling method of the medium coal seam for controlling the movement deformation of the overlying rock, which is suitable for the coal face with the coal seam thickness more than 2 meters. The method comprises the following steps: determining the initial weighting interval L and the periodic weighting interval M of the main roof according to the main roof initial weighting interval theory; arranging the rooms and the coal pillars at intervals; and using the material with high expansibility in water during the filling according to the method comprising the following steps of mining the rooms, filling the empty rooms, mining the coal pillars and filling the empty zones of the coal pillars. The method provided by the invention can determine the most economical filling ratio through controlling the key layer to maximize the benefits; the method provided by the invention can control the movement deformation of the overlying rock absolutely within the allowed range when realizing the pulling without pillars, and realize the extremely small gentle uniform sinking of the ground; and the method provided by the invention can realize the mining of the coal resource with high recovery rate under any condition by using the material with high expansibility in water, and greatly enhance the security of coal face. When the rooms are mined, a plurality of coal face of rooms can be arranged at intervals to enhance the working efficiency.
Owner:ZIBO WANGZHUANG COAL MINE

Stepped non-pillar continuous filling mining method for deep well super high large breaking ore body panel

The invention discloses a stepped on-pillar continuous filling mining method for deep well super high large breaking ore body panel. An ore body is divided into a front part and a rear part in a super high large breaking ore body center by an transportation roadway, then the front part and the rear part are respectively divided into a plurality of panels, no pillar exists between pillars, each panel is partitioned into a primary extracting drift and a second extracting drift, the panels in the front part are extracted at first and then the panels in the rear part are extracted, the front and rear panels are extracted in a stepped manner, each production technology is carried out in the same level, and procedures can not influence each other; after the stop back production is finished, the primary extracting drift is filled with cement and the secondary extracting drift is filled by classifying tailings while roof-contacted filling is ensured; and the primary extraction drift and the secondary extraction drift adopt high strength filling topping, and binding materials are added in the filling tailings so as to improve the compression strength of a topping layer. The invention has the characteristics of high extraction safety, small loss and dilution, high mechanical degree, large stope amount, large back production strength, high production capability, short back production time and the like.
Owner:CENT SOUTH UNIV

Solid-filling coal mining method with two pre-excavating tunnels for advancing

ActiveCN102996131ASolve the technical problems that cannot guarantee the filling effectEasy to useUnderground miningSurface miningFilling materialsMining engineering
The invention discloses a solid-filling coal mining method with two pre-excavating tunnels for advancing. A mining roadway adopts an arrangement mode that the pre-excavating tunnels are taken as air return and inlet roadways and a gob-side entry retaining roadway is taken as a roadway for transporting filling materials and coal; coal extraction and gob backfilling are carried out by a comprehensive mechanical solid-filling coal mining process; and according to the coal mining method, a mining sequence is propelled by making a filling coal mining work surface be back to the direction for transporting the coal to a mountain in a mining area. The pre-excavating tunnels are formed before the extraction of the work surface by tunneling, and the gob-side entry retaining roadway is formed by optimally designed filling bodies beside the roadway along with the implementation of advancing filling coal mining operation along the work surface. The coal mining method is simple in process and technically and completely realizes coal milling without pillars, and the resource extraction rate of the coal is high. The coal mining method can not only solve the technical problems that a draw-back-type down-mining and up-filling work surface cannot ensure a filling effect during a filling milling process of a mine with shortage of resources, but also materialize the comprehensive mechanical solid-filling coal mining of mines with limited geological conditions by virtue of an advancing up-milling and down-filling work surface.
Owner:CHINA UNIV OF MINING & TECH

Method for filling solid and fully mechanizing and recovering room type coal pillar

The invention discloses a method for filling solid and recovering and fully mechanizing room type coal pillars, comprising the following steps of: reinforcing and supporting a coal pillar and a coal room top plate in a pre-recovering room type coal pillar area and suspending and hanging a wind curtain to form a solid substance haulage drift and a coal haulage drift which are connected with a large haulage drift; recovering the coal pillars by the conventional method, starting matching equipment after cutting a coal interval and transporting the solid substances to a goaf from the ground for filing and tamping; and cutting coal of next coal interval and filling the goaf, repeating the steps until finishing the recovery of all room type coal pillars. The method not only solves the problems that unstable coal pillar causes the safety accidents due to the superposition of stress of the front part and two sides of a workface because of the recovery of the traditional coal pillar, but also eliminates the potential safety trouble caused by the hurricane, large-area sinking and the like caused by the spontaneous combustion of the room type coal pillar and the large-area caving of hard top plates in the goaf. The invention has simple method, high production efficiency, low cost and over 85 percent of the recovery rate of the coal pillars.
Owner:CHINA UNIV OF MINING & TECH

High-sublevel subdivision mining method of moderately thick heavy-pitch waste-rock-containing interlayer phosphate orebody along strike

The invention discloses a high-sublevel subdivision mining method of a moderately thick heavy-pitch waste-rock-containing interlayer phosphate orebody along a strike. The high-sublevel subdivision mining method comprises four steps of exploiting, mining preparation, cutting and recovery, wherein a footwall intermediate-section main roadway is respectively arranged on a high sublevel along a top plate and a bottom plate of the orebody, and the intermediate-section main roadways of the top plate and the bottom plate are connected through a communication channel at intervals of 100m, therefore reduced roadway cutting construction, small development rate and simple process are achieved; after overall blasting of a stope is finished, a large amount of concentrated ore drawing is carried out, and the production efficiency is high; tail sand is adhered and filled after space pillars are mined first, then rooms are evacuated, and the rooms are filled with waste rocks or tail sand in a non-adhering way, thus recovery rate is high; and the high-sublevel subdivision mining method has little damage to the environment and capabilities of changing oredressing tail sand and waste rocks generated in open-air production into valuables and reducing geological disaster from happening. Due to the adoption of the high-sublevel subdivision mining method disclosed by the invention, ore recovery rate can be increased, ore dilution rate and emission of mine wastes are reduced, capacity of slag disposal pit is relatively increased, expropriation of land is decreased, and mineral land harmony is promoted.
Owner:WENGFU (GRP) CO LTD

Mining method for steeply dipping ore bodies

InactiveUS6857706B2Efficiently and effectivelyAvoid a lotDisloding machinesUnderground miningEngineeringExcavator
The present invention is directed to a mining method for steeply dipping orebodies. In the method, an excavator 152 is tethered to a deployment system 120 by one or more cables / umbilicals 144. The excavator 152 excavates slices 172a-h of the orebody 100 by moving generally up-dip, down-dip or a combination thereof. The excavator can be automated.
Owner:MIN OF NATURAL RESOURCES CANADA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products