224 results about "Open-pit mining" patented technology

The invention provides a method for analyzing bench slope stability under blasting effect, and belongs to the technical field of open-pit mining. Compared with a conventional method, the method combines numerical simulation with vibration monitoring, and uses vibration information of a slop body to correct material parameters of the slop body, and provides more accurate input parameters for numerical simulation. A numerical simulation method coupling finite elements with discrete elements is used to perform mechanical analysis, and progressive failure process of the slope under blast load effect is completely depicted. A calculation result is more accurate. Rupture degree is used to evaluate slope stability, and internal damage and rupture conditions of a slope body can be directly reflected, and an evaluation index is more reasonable.

The invention belongs to the technical field of mine geological monitoring, and discloses a non-fixed wing unmanned aerial vehicle airborne radar mine mining land change monitoring system and method.The system comprises a non-fixed wing unmanned aerial vehicle for loading a lidar, a lidar GPS receiver, an inertial navigation system, a laser transceiver, a static GPS receiver and a control and a post-processing system, and comprises inertial navigation control software, LIDAR data acquisition software, trajectory calculation software, point cloud data calculation post-processing software and point cloud post-processing software. Through acquisition of two or more periods of point cloud data of the non-fixed wing unmanned aerial vehicle airborne radar, changes of mine surface geomorphological height differences in different time periods are formed, a new mine mining land area and elevation change monitoring technology is provided, surface elevation changes such as a mine open mining pit, a slag disposing area and mining subsidence are grasped, and scientific basis is provided for mine geological environment control, land reclamation and development, use and planning.

The invention discloses an opencast mine end slope near-slope mining method. During an opencast mining process, for integral side slopes of end slopes on two horizontal sides of a mining field, near-border mining is carried out according to a stable angle alpha as in an initial design; according to a timeliness slope principle, inner dump is followed up in time; a pit bottom distance is shortened to a minimal safety distance Dmin required by mining, and integral height H of the side slope of the end slope is reduced; according to a side slope stable condition, the side slope angle is increased to beta; and near-slope mining is realized. The height of inner dump bottom layer slope-pressing step is 2-3 times that of mining working slope step. Stripped soil and rock are transported to the inner dump bottom layer slope-pressing step through a built soil-discharge bridge. With the method provided by the invention, side slope angle can be increased on a basis that slope end stability is ensured. Therefore, end slope residual coal can be recovered; stripping ratio can be reduced; and transportation cost can be reduced.

The invention relates to a mining method of a nearly horizontal mineral deposit of an opencast coal field by casting and internally dumping and belongs to the mining method of the opencast coal field. The mining method comprises the following steps: (1) dividing a strip mine into a plurality of mining regions, mining overburdened materials of a first strip region, and stacking the overburdened materials outside an opencast mining limit; (2) dividing an overburdening table into one or more tables to be mined; (3) discharging the overburdened materials of a second strip region into a worked-out section of the first strip region after a mineral deposit exposed in the first strip region is mined, and transporting mined mineral products out of a mining field through entering-exiting channel transporting passages arranged on two sides of a channel or the middles of the strip regions. The mining method has the advantages that as the overburdened materials can be discharged and abandoned in the worked-out section, the occupied land of an externally-dumped soil site can be saved; the mining method is environment-friendly and is capable of restoring the land influenced by the mining operation during mining; abandoned and unserviceable lands in barren and mountainous mines can be changed into usable lands.

The invention discloses a method for recovering coal in an easily sliding area of strip mine, which is most suitable for recovering coal in a slope of the easily sliding area with a remarkable sliding surface. In a process of strip mining, the sliding surface is existent inside the slope of the easily sliding area; and when the coal in the easily sliding area are mined, the lower part of the sliding surface is located in the mining range. For preventing the exposed length of the sliding surface from being too long, the slope of the easily sliding area is divided into a plurality of mining strips for mining according to the trend, and the width of the mining strip is 2 times the working radius of a used electric shovel. The method comprises the steps of firstly mining the first mining strip, which is perpendicular to the trend of the slope or is pushed in the trend of the slope; timely following by an internal waste dump; after mining the previous mining strip, continuously mining the next mining strip; covering the exposed surface of the previous mining strip after reaching the boundary by the internal waste dump in sequence; and running in cycle until all the mining strips are mined. The method can be used for reducing the exposed length of the sliding surface of the easily sliding area, guaranteeing the slope to be stable, increasing the slope angle, recovering the coal and lowering the stripping ratio.

The invention discloses a jamb recovery and cushion layer formation integrated technology in the process of mining from outdoors into underground. The technology comprises the following steps of: in the later stage of opencast mining, reserving a boundary pillar (1) at the bottom of an open pit, and carrying out underground mining on a first middle section in the process of underground mining by a large-parameter studding open-stope method; when the opencast mining and the open-stope method zone mining are ended, distributing blasted holes in the boundary pillar (1), distributing blasted holes in a jamb (3), charging powder at the same time and detonating in a segmented way, firstly detonating the blasted holes in the jamb (3), detonating the blasted holes in the boundary pillar (1) at the bottom of the open pit, and enabling fallen ores formed in a detonating way to form a cushion layer (4); and mining at a later-medium section in the process of underground mining by a caving method, and recovering the cores of the cushion layer (4) in the process of mining at a zone adopting a caving method. According to the technology, the open work and the underground work are carried out at the same time, the transition is stable, the safety in the process of open mining and underground mining can be improved, a mass of ores are recovered, a covering cushion layer for mining adopting the caving method can be solved, and the dilution ratio caused by the caving method can be greatly reduced.

The invention relates to a mining technique for recycling hanging wall ore body and transforming a strip mine to an underground mine, in particular to a mining method for recycling long-thick ore body hanging wall ore and transforming the strip mine to the underground mine. The method comprises the following steps: dividing the hanging wall ore on the other end of a mining pit into a transitional-period underground mining area, a transitional-period strip mining area and an isolation ore pillar at the later period of the strip mining; simultaneously mining the ore in the transitional-period strip mining area and the transitional-period underground mining area, and backstoping an upper side of hanging wall ore after being disclosed by adopting a open-stope method; and sequentially forming a cover layer along the trend of the ore body from the end of the pit without the hanging wall ore by utilizing a method for backfilling a dead zone with waste stone, breaking the ore pillar reserved when the upper side of hanging wall ore is mined in the area with the cover layer reaching the thickness requirement after the backstoping of the upper side of hanging wall ore is ended by adopting the fragmental open-stope method, improving the mining intensity after the cover layer is formed, and gradually carrying out the mining, cut and backstoping work of a second section of deep ore. By adopting the method, the transition from the strip mining to the underground mining is realized, the reserved hanging wall ore reserved in the strip mining can be recycled, and the waste of mineral resource can be avoided.

The invention belongs to the technical field of open pit mining of a coal mine, and particularly relates to an experimental device and method for flowing water sand carrying under the effect of simulated seepage-vibration. A flowing water sand carrying process in a water-containing sand bed under the water injection conditions of change of groundwater level, rainfall penetration and the like under the effects of high water head difference and vibration is simulated in a laboratory, related anisotropic flowing water sand carrying parameters and a saturation line distribution law under different water injection conditions are acquired, inner structural features in the sand bed and a dynamic evolution and water-sand two-phase flow integral migration trend of a seepage path are observed, and therefore, mutual relations and mechanisms of action of the inner structural features of the water-containing sand bed, flowing water sand carrying parameters and a water-sand two-phase flow migration law in a hole are disclosed.

The invention provides an ore rock similar material for a model test for transferring open pit mining into underground mining. The ore rock similar material at least comprises an ore body and upper and lower bottom wall surrounding rock body similar material and a fault simulation material, wherein the ore body and upper and lower bottom wall surrounding rock body similar material is formed by mixing and curing main aggregate, a cementing agent and additive; the main aggregate comprises barite powder and quartz sand and one of iron ore powder and reduced iron powder; the cementing agent is unsaturation resin and gypsum; the additive at least comprises glycerol and water; and the fault simulation material is a polypropylene film and is adhered to the ore body and upper and lower bottom wall surrounding rock body similar material. According to the similar material, the defects in the prior art are overcome; the ore rock similar material is low in preparation cost, stable in performance,easy to prepare, and short in curing period; the raw materials are wide in source and low in price and does not have any toxic or side effect; and scientific basis is provided for research on the relative scientific technology for realizing safe working of a mode of transferring open pit mining into underground mining.

The invention discloses a high-efficiency, safe and environment-friendly mining method for irregular strip-shaped thin and shallow buried mine seams. The mining method adopts the method of arranging mining pits along the direction of the mine seam, and Stripping and mining by step-by-step open-air step blasting in sequence, drilling, blasting and transportation are arranged in steps. The drilling, blasting, and transportation operations have high production efficiency and are safer than other mining methods. The stripped waste rock is backfilled to the first mining area. The mined-out area of ​​the section saves land resources, protects the natural environment, saves transportation costs, reduces comprehensive mining costs, reduces energy consumption, and reduces waste rock discharge. The invention solves the problems of backward mining planning, low production efficiency, unsafe production, valuable land occupied by dumps, environmental pollution by dumps, high transportation energy consumption, high mining costs and living environment caused by mining in traditional open-pit mining projects. and environmental pollution and other technical issues.

An embodiment of the invention discloses an open bench inter-hole differential control blasting method, which relates to the technical field of mining and is invented for solving the problems that resulting fragmentation degree needs to be better, blast vibration damage needs to be reduced, and large-scale blasting needs to be implemented effectively. The method includes: subjecting blast holes in a same row to inter-hole differential accumulation according to delay time of 1-5ms per hole-pitch meter, and performing inter-hole differential interval blasting; subjecting the blast holes in all rows to inter-hole differential accumulation according to the delay time of 10-30ms per row-spacing meter, and performing inter-row differential interval blasting; and filling at least one of the blast holes with a plurality of priming bombs or spaced charged explosive, and performing intra-hole differential interval blasting. The method is applicable to open-pit mining, and also applicable to large-scale earth-rock excavation engineering, large-scale hydropower engineering, large-scale civil engineering, large-scale underground workshop excavation and the like.

The invention discloses an outdoor underground three-period mining method of an inclined, thick and large mineral deposit. The outdoor underground three-period mining method comprises the steps of dividing a life cycle of the mining the mineral deposit into an outdoor mining period, an mining transition period shifting from outdoor mining to underground and an underground mining period by the following two steps: creating an outdoor underground mining boundary division formula, according to a relationship between a limit stripping ratio function and an economic stripping ratio function, determining an outdoor underground mining boundary, and distinguishing the dividing of the life cycle of the mine; and on the basis of outdoor underground mining boundary division, determining a mining opportunity in each of three mining periods. According to the outdoor underground three-period mining method, three mining periods are subjected to unified comprehensive planning and designing, so that when the outdoor mining period is designed, a development system is considered to be utilized in the subsequent underground mining period, and when the mining operation transitions from outdoor mining period to the underground mining period, favorable factors such as related engineering and facilities and the like in the outdoor mining period are utilized as far as possible in the underground mining period at the same time. Therefore, repeated investment of the mine development system in construction can be effectively reduced. The outdoor underground three-period mining method can be widely applied to the mining of medium and thick or thick and large inclined or steep mineral deposits in the industries of black metal, nonferrous metal, coal, chemical and the like.

The present invention relates to an open-pit mine excavation process, in particular, it relates to an open-pit mining process capable of quickly discharging earth to protect bank and making ecological restoration. It is characterized by that in one end of open-pit mine or its middle said invention adopts a conventional method, if the stripping and mining operation of initial stripping working face is completed, on the deposit mining direction the mining working face can be divided into left side zone, medium zone and right side zone, then they are further divided into several smaller subsections, every subsection can be used as an unit, on every subsection the processes of stripping, mining, backfilling and banking, cultivating-greening or covering with concrete are progressively adopted so as to implement the invented open-pit mining process.

The invention discloses a transport method of a lower stripping material of a strip mine, and particularly relates to a transport method of building a longitudinal composite bridge in the middle of a strip mine stope. Bridging manners of the longitudinal composite bridge include linear bridge stacking and fan-shaped bridge stacking. In a strip mining process, an operating line is long and a material stripping haul distance is large, so that building of a middle bridge perpendicular to the operating line in the gravity center of a stripping material in the stope can reduce a perpendicular haul distance of material handling on a bridge body. Building of sub-bridges based on the single bridge can increase service stripping steps of the bridge body. The transport method of building the longitudinal composite bridge in the middle of the strip mine stope is applicable to internal dumping strip mines adopting single-bucket excavator and truck mining technologies in a horizontal or subhorizontal strip coal mine, can reduce an automobile haul distance of the lower stripping material, can lower the transport cost, can increase an economic benefit, and has wide practicability.

A real-time mobile communication platform comprising a remote unmanned apparatus, an earth station associated with a data receiver, status monitoring sensors, a plurality of biometric sensors, a microprocessor, a warning device, a plurality of broadband wireless communication devices, a plurality of broadband wireless communication devices, and a control room. The present disclosure teaches Real-time mobile broadband data access via satellite to mobile heavy equipment and personnel, focusing on health and safety solutions to open-pit mining operations in remote areas of the world. The system consists of a platform which allows for the integration of health and safety solutions, status monitoring systems, and transmitting broadband information in Real-time from these systems to anywhere in the world. The present disclosure's teaches: 1) Gathering information from the sensors on work vehicles and personnel; 2) Transmitting Real-time broadband data packets over a wireless appliance; 3) Translating and processing information obtained through an intelligent diagnostic application which is placed on board heavy mobile vehicles and personnel and then transmitting it via a wireless network; 4) Displaying the information collected in Real-time anywhere in the world via host computers or on a web page.

The invention discloses a new open-pit mining method suitable for steep slope terrain. The steep slope terrain is divided into 2 to 4 steps, the stripping operation surface is arranged along the strike, and a vertical strip L is divided every 14 to 16m in the vertical strike direction. , the step height H is not greater than 1.5 times the maximum excavation height of the hydraulic excavator (10), and the width of the bottom loading platform (11) is greater than 18m, so as to meet the operation requirements of the mine transport vehicle (12), implement single-step operation, blasting operation Finally, the hydraulic excavator (10) is used for mining from top to bottom, from outside to inside, and gradually advances to the final side. The ore is unloaded to the bottom by the hydraulic excavator (10) from top to bottom, from inside to outside The loading platform (11) is transported out through the mining transport vehicle (12). The invention has the advantages of simple process, easy-to-obtain equipment, safety and feasibility, and effectively solves the problems of large steep slope terrain, impossibility to build transportation roads, and difficult construction when conventional step mining is adopted.

The invention discloses a water retention method of open coal mining frozen water-bearing stratum, which is applicable to the technical field of coal mining and environmental protection. The method includes steps of exploring distribution content of underground water-bearing stratum of a zone through hydrogeology drilling; practicing a freezing circle interception on the underground water-bearing stratum in a well field scale by an artificial cooling method, and preventing the underground water out of the well field mining scale from discharging to an open mine pit. The water retention method cannot disturb normal production activity, and can effectively prevent underground water body at periphery of the well field from discharging towards the open mine pit, maintain the underground water level at the peripheral zone, and effectively protect the ecological environment at surrounding of the mine zone; particularly, the method is applicable to the water retention and mining in the severely cold opencast working zone in the west part; the local climate condition can be fully utilized to reasonably reduce the energy consumption from practicing the embodiment; the method is economic and environment-friendly, and has very high reliability and practicability.

The invention discloses an analysis method for stability of a strip mine side slope exploding process and belongs to the field of coal strip mining engineering. The analysis method for the stability of the strip mine side slope exploding process comprises the following steps of (1) constructing a slide slope model; (2) setting exploding parameters; (3) constructing an exploding model; (4) performing slide slope stability analysis on above explosions. A result shows that the upper layer sandstone is stable after the above explosions, namely the slope top is stable, the lower layer sand stone and the sandy mudstone are damaged in a certain degree, landslides in large areas are not occurred, and the landslides are within a controlled range. The analysis method for the stability of the strip mine side slope exploding process shows that the upper layer sandstone is stable after the above explosions, namely the slope top is stable, the lower layer sand stone and the sandy mudstone are damaged in a certain degree, landslides in large areas are not occurred, and the landslides are within a controlled range.

The invention discloses an optimization method for slant-basement inner-dumping-site side slope shapes, and belongs to the field of opencast working. The optimization method includes the steps that (1) influence factors of the stability of slant-basement inner-dumping-site side slopes and potential landslide modes are qualitatively analyzed; (2) inner-dumping-site side slope rock-soil bodies are subjected to mechanics experimenting, and physical mechanical indexes of the side slope rock-soil bodies are obtained; (3) the safety reserve coefficient K of the slant-basement inner-dumping-site sideslopes is determined; (4) the slant-basement inner-dumping-site side slope shapes with different discharging heights and different flat plate widths are designed, and the optimal side-slope stabilitycoefficient and the maximal discharging space are designed; (5) the obtained optimal side-slope-shape scheme is simulated and checked through FLAC<3D> finite difference numerical simulation softwarewith the strength reduction theory algorithm, and the feasibility of the optimal side-slope shape is further verified. According to the optimization method, the inner-dumping-site stability and continuous development of inner dumping space are guaranteed, a basis is provided for designing of the side slope shapes, and meanwhile a large amount of opencast working cost is saved.

The present invention provides for steam generation replacing natural gas with a selected refined product of a feedstock of bitumen, asphaltines or heavy oil using locally produced surplus bitumen, asphaltine or heavy oil, separating the asphaltines and other components of the feedstock for use in providing a liquid fuel for steam generation. The lighter products from the separation equipment not used for liquid fuel may be blended into the produced bitumen, asphaltines or heavy oil, to increase its API gravity and reduce the diluent required for transportation. This technology may be employed in open pit mining operations for the generation of steam and power. The refined components of the feedstock used to provide liquid fuel are selected to optimize energy output balancing planned energy demand against the value of the components of the feedstock used.