25 results about "Slope mining" patented technology

The invention provides a method for analyzing the dynamic stability of a slope containing a mining cavern group under the action of dynamic and static loads, and belongs to the technical field of analysis of the dynamic stability of the slope containing the mining cavern group. In order to solve the technical problem that complex mechanical behaviors of a slope containing a mining cave group under the dynamic and static load coupling effect are difficult to accurately consider because most of existing slope stability analysis aims at single static load or dynamic load working conditions, the technical scheme adopted by the invention comprises the following steps: collecting end slope mining coal pillars and rock samples of rock stratums overlying the end slope mining coal pillars, and testing physical and mechanical parameters of the rock samples; the physical and mechanical parameters of all the rock stratums are finally selected in combination with related production materials of the mining area; calculating a shear strength parameter of the rock mass after the rock is damaged under the action of cyclic blasting vibration; calculating shear strength parameters of the end slope mining area-evolved weak layer under the action of blasting vibration; the stability of the slope containing the mining cavern group under the blasting vibration effect is calculated; the method is applied to the stability analysis of the power of the slope containing the mining cavern group.

The invention discloses an end slope mining side slope real-time stability testing system and method, and relates to the technical field of open pit coal mine end slope mining safety monitoring and early warning, and the method comprises the steps that a distributed optical fiber sensing network arranged on a side slope surface and a mining chamber top plate collects acoustic emission and strain time sequences; a solid-state laser radar array arranged on the stope platform collects slope surface point cloud data of the stope platform; during data acquisition, the solid-state laser radar array and the distributed optical fiber sensing network are in time alignment; carrying out slope displacement increment extraction on the slope point cloud data of the monitored area by the edge GPU node; the data analysis cloud platform is used for performing microfracture identification according to the acoustic emission and strain time sequence; and inputting the slope displacement increment, the micro-fracture event count and the strain time sequence into the trained stability evaluation model to obtain a stability evaluation result, and capturing the internal micro-fracture, surface micro-displacement and shear-expansion coupling characteristics in real time, and providing high-reliability instability prediction.

The invention provides a non-uniform load lower end slope mining supporting coal pillar dynamic stability evaluation method, and belongs to the technical field of end slope mining supporting coal pillar dynamic stability evaluation. In order to solve the technical problem that under the condition that blasting vibration and overlying strata coupling effects are not considered in a conventional coal pillar stability evaluation method, risks possibly exist in personnel and an end slope coal mining machine due to supporting coal pillar parameter design, the adopted technical scheme comprises the steps that end slope retention coal and overlying strata rock samples are collected; testing physical and mechanical parameters of the retained coal and the rock sample of each overlying rock stratum; based on the dynamic response and deformation rule of the supporting coal pillar under the coupling action of the non-uniform static load and the blasting dynamic load, establishing a supporting coal pillar dynamic instability criterion based on a sudden change theory; based on the relation model of the maximum bending moment and the tensile stress of the coal pillar roof under the dynamic-static load coupling effect, a roof dynamic instability criterion based on the strength theory is established; the method is used for controlling the stability of the open pit coal mine end slope mining supporting coal pillar.

The present disclosure provides a system for vertical deployment of leaching lines onto a slope of a mine leach pad. The system includes an elevated guidewire having a first end disposed at a top of the slope and a second end disposed at a bottom of the slope; the elevated guidewire being elevated above a surface of the slope; a deployment apparatus moveably coupled to the elevated guidewire and having one or more attachment mechanisms disposed thereon; and one or more leaching lines coupled to the attachment mechanisms; wherein movement of the deployment mechanism from the top of the slope to the bottom of the slope pulls the one or more leaching lines down the slope and deploys the one or more leaching lines vertically onto the surface of the slope.

The application discloses a kind of based on bulk body pushing prestressed end help mining chamber filling method, including bulk body broken material filling, setting gravity pile, filling paste filling layer, pushing machine heap loading, chamber wall protection, chamber mouth closure, supplementary support and the like steps.The present application does not need to construct fixed facilities, with the advantages of flexible deployment, low investment cost, etc., while effectively solving the problem that loose material cannot support roof, suitable for short service life, slope overburden resource limited open pit end temporary mining operation;The unique design of gravity pile can enhance the stability of gravity pile, increase the friction at the bottom, prevent gravity pile from slipping or overturning;Artificial segmentation is carried out on the mining chamber, blocking the flow of bulk body broken material in the filling process towards the chamber mouth direction;It is convenient for prestressed segment loading;Provide a relatively closed space for the action of paste filling layer;Bulk body broken material filling layer can not only make up the settlement deformation, but also provide supplementary support force, while not increasing filling cost too much.

The present application belongs to the technical field of mining equipment. In order to solve the problem that the existing side slope mining equipment is generally fixed or semi-fixed, which cannot meet the unloading requirements under different working conditions, a kind of open pit side slope mining multi-degree of freedom unloading device is provided. The device includes a support seat, a horizontal unloading part, a first drive assembly, a high beam, an inclined unloading part, a connecting frame and a second drive assembly. The first drive assembly drives the horizontal unloading part to rotate, and the second drive assembly drives the connecting frame to move, thereby driving the inclined unloading part to rotate around the vertical line of the high beam. The device has a simple structure. By changing the unloading position and unloading height through the first drive assembly and the second drive assembly respectively, the overall unloading part can realize multi-degree of freedom movement relying on the mechanical structure, and the adaptability of the device to different working conditions is improved.

This invention discloses a method for recovering coal from side slope pressure in open-pit mines with monitored stress displacement. The method involves mining in soft rock strata; a filling station is set up at the uppermost flat area of ​​the slope crest, and filling pipelines are laid down the slope from the bottom of the filling station to the mining chamber; after mining a chamber, a reinforcing cage is sent into the chamber, equipped with inclinometers and force measuring devices; after the reinforcing cage is sent into the chamber, the filling station injects liquid filling material into the chamber through the filling pipelines, and the liquid filling material solidifies to form in-situ filling piles; the in-situ filling piles replace the soft rock strata, significantly improving the overall stability coefficient of the slope, increasing the final slope angle while maintaining the slope height, and advancing from the bottom of the pit at the slope toe towards the end slope, achieving side slope mining and increasing coal resource recovery; through pre-embedded inclinometers and force measuring devices, the changes in vertical displacement and vertical stress of the slope are monitored continuously during side slope mining.

The present application belongs to the technical field of end slope mining stability detection, and aims to solve the problems of destructiveness and difficulty in real-time testing of the existing coal pillar stability testing method. A kind of end slope mining coal pillar stability testing method, device, equipment, medium and product are provided, the method comprises the following steps: determining the voxel density defect of coal pillar;Acquire the microseismic event frequency of the slope step above the coal pillar;Based on voxel density defect, microseismic event frequency, equivalent compressive strength of coal pillar and actual coal pillar load, solve the stability coefficient of coal pillar;The stiffness ratio of system equivalent stiffness and coal pillar shear stiffness is used as the parameter for representing the stiffness stability margin of coal pillar;Based on the strength-stiffness double criterion composed of coal pillar stability coefficient and stiffness ratio, the stability of end slope mining coal pillar is judged. The present application can realize non-contact and online evaluation of the strength of end slope mining coal pillar, and at the same time, the stability of coal pillar is judged by combining the improved local mine stiffness theory.

The utility model relates to the technical field of mining equipment, in particular to a scraper conveyer for a drilling, loading and exploring unit, which comprises a loading device, a scraper chain, a conveying groove, a chain tensioning device and a driving device. The tensioning device comprises a tensioning sliding block and an elastic piece, the tensioning sliding block is installed on the side wall of the second end of the conveying groove in a sliding mode, the elastic piece is connected between the side wall of the conveying groove and the tensioning sliding block, and the driving device is installed on the tensioning sliding block and connected to the scraper chain in a driving mode. According to the scraper conveyor for the drilling, loading and exploring unit, the scraper chain can also be automatically tensioned to avoid chain clamping during ramp mining through the elastic piece and the tensioning sliding block, and the technical problem that in the prior art, the chain transmission mode of the scraper conveyor is prone to the chain clamping phenomenon in the shovel plate movement process is solved.

The present application belongs to the technical field of coal mining. In order to solve the problem of loose protection structure of existing side slope equipment, separate arrangement of dust removal system, low safety and dust removal efficiency, an open side slope mining portal protection and dust removal device is provided. The device is arranged on a platform and includes a protection assembly arranged at one end of the platform close to the mining portal, an extension assembly, a negative pressure air duct, a suction air duct and a dust remover connected in sequence. The extension assembly includes a first connecting piece, an extension arm, a plurality of bent plates and a plurality of support frames. The extension arm includes a plurality of sleeves that are mutually sleeved. The negative pressure air duct is arranged in the support frame. A driving assembly is arranged in the sleeve. The driving assembly drives the plurality of sleeves and the negative pressure air duct to move towards or away from the mining portal, so that the negative pressure air duct exceeds the protection assembly or is completely retracted to the bottom of the protection assembly. The device has a compact structure, can protect the dust removal equipment, can adaptively adjust the dust removal, and can meet various working conditions and mining processes of side slope mining.

The invention discloses a water-bearing side slope freezing type wall-leaning mining method. The method comprises the steps of underground water layer exploration, freezing circulation system construction, wall-leaning mining after freezing, freezing relieving, underground water system recovery and the like. According to the invention, multiple types of wells are matched with the freezing communication network, so that underground water can be effectively frozen; cold energy transmission materials are completed through underground water in the area, local materials are used, and the implementation cost is reduced; a waterproof retaining wall is formed after freezing, so that relative dryness of the slope can be ensured, and the stability is improved; after the freezing effect is relieved, the underground water recovers to run through, and permanent interference on underground water circulation in the area is avoided; the semi-sealed well wall prevents high-salinity water from reversely permeating to underground water on one side deviating from the pit bottom, and mineral pollution to the underground water can be effectively avoided in cooperation with monitoring dilution; the method is implemented in an extremely small range of a strip mine mining area, mine production arrangement is not affected, and potential safety hazards do not exist after dumping coverage; the implementation process does not affect the mine production order.

The application discloses an open coal mine side slope pressure coal cooperative filling mining method and system, and the mining method comprises the following steps: S10, investigating the geological conditions of the open coal mine side slope pressure coal resources, designing the mining parameters of the side slope mining tunnel (1), and numbering in sequence, wherein the mining parameters comprise width, length and inclination; S20, using the side slope coal mining equipment to complete the mining of a plurality of mining tunnels (1) according to the preset parameters and the specified mining mode, and arranging the filling drill holes (6) at intervals above each overlying step (2) of the mining tunnel (1); S30, using the gangue throwing filling machine (4) to throw and fill the discarded gangue stripped from the overlying step (2) of the open coal mine into the mined mining tunnel (1) to form a heap (5), and closing the mining tunnel entrance (17) after the completion of the heap (5); S40, injecting the paste filling material (7) into the mining tunnel (1) through the filling drill hole (6), closing the drill hole until full, and repeating the filling of the next mined side slope mining tunnel (1).

The invention belongs to the technical field of end slope mining stability detection, and aims to solve the problems of destructiveness and difficulty in real-time testing of an existing coal pillar stability testing method. The invention provides an end slope mining coal pillar stability testing method, device and equipment, a medium and a product. The method comprises the following steps: determining a voxel density defect of a coal pillar; acquiring the frequency of a micro-seismic event of a slope step above the coal pillar; solving a coal pillar stability coefficient based on the voxel density defect, the micro-seismic event frequency, the equivalent compressive strength of the coal pillar and the actual coal pillar load; the rigidity ratio of the equivalent rigidity of the system to the shear rigidity of the coal pillar is used as a parameter for representing the rigidity stability margin of the coal pillar; and the stability of the end slope mining coal pillar is judged based on strength-rigidity double criteria formed by the stability coefficient and the rigidity ratio of the coal pillar. According to the method, non-contact and online evaluation of the end slope mining coal pillar strength can be realized, and meanwhile, the stability of the coal pillar is judged by combining an improved local mine stiffness theory.

The present application belongs to the technical field of mining equipment. In order to solve the problem that the arrangement of each mechanism in the existing walking platform of side slope mining is unreasonable and cannot meet the demand of multiple working conditions, a walking platform for open-pit side slope mining is provided, which comprises a protection mechanism, an upper platform assembly, a dust removal mechanism, a lower platform assembly, a wind supply mechanism and a discharging mechanism. The upper platform assembly is connected with the lower platform assembly to form a whole, the protection mechanism, the dust removal mechanism and the wind supply mechanism are all arranged on the upper platform assembly, the protection mechanism is arranged at one end of the upper platform assembly close to the mining tunnel, the dust removal mechanism and the wind supply mechanism are connected, and the discharging mechanism is arranged at one end of the lower platform assembly away from the mining tunnel. The walking platform has compact structure and simple operation, meets the process requirements of dust removal and discharging of the open-pit mine, the protection requirements of the platform, and the working requirements under each working condition, realizes the green mining of side slope coal compression, and ensures the rationality and practicality of the whole platform structure.

The application discloses an open-pit mine dip coal seam end slope mining and filling device and a filling method. The filling device comprises a plurality of sequentially connected filling units. The filling unit comprises a frame and a filling component. The filling component is arranged in the frame. The filling component is divided into two structures. One is a bag type structure, and the other is a plate type structure. The device is convenient to assemble and simple to operate, and can be conveniently pushed into the mining tunnel. The application realizes dip coal seam mining and filling, prevents backflow of the filling material, is safe and reliable, and has high filling rate. The application can be effectively used in end slope filling mining technology for full-height and layered mining of the dip coal seam, greatly improves the filling rate of the dip coal seam filling mining, and fills the blank of the end slope filling method of the dip coal seam.

This invention belongs to the field of pre-splitting blasting technology, specifically relating to a hard rock pre-splitting blasting method using a roller cone drill rig instead of a down-the-hole drill rig. The hard rock pre-splitting blasting method includes eight stages: parameter design, drill rig preparation, hole drilling, hole acceptance, charge packing, network connection inspection, blasting implementation, and post-blast acceptance. This invention optimizes the drilling parameters of the roller cone drill rig, adjusts the pre-splitting hole network parameters, matches the charge structure and detonation method, and establishes a closed-loop process control system. This achieves efficient, precise, and low-cost application of the roller cone drill rig in hard rock pre-splitting blasting, significantly improving hole drilling efficiency and pre-splitting quality, and ensuring the safety of open-pit mine slope mining. It overcomes the shortcomings of existing down-the-hole drill rigs in hard rock (f≥10) pre-splitting blasting, such as low hole drilling efficiency, large drilling deviation, discontinuous pre-splitting, high drill bit wear, and easy drill bit jamming and rod breakage.

The application discloses a method for mining end slope coal with a thickness greater than 40 meters by segmented throwing blasting and leaning on the slope, divides the end slope into several steps, trims the slope surface of the end slope steps, sets throwing drill holes, simultaneously excavates loose drill holes to improve the breaking and throwing effect of the bottom coal, and provides support for the steep end slope after the blasting of each drill hole through blasting piles and internal material discharge. After the throwing blasting, the recovery steps are arranged on the loose raw coal, and the reserved platforms of the end recovery steps are used to discharge and strip the material in the reverse direction after the raw coal is mined. The application adopts the reserved slow end slope leaning on the slope mining method to recover in sections, reduces the exposed area and time of the end slope steep slope, and improves the stable slope angle. The end slope coal is recovered by using the throwing blasting method, the working time of personnel and equipment under the end slope is reduced, the production efficiency is improved, the safety coefficient is improved, the damage to the complete rock mass is reduced, and the integrity of the final slope coal rock mass and the slope stability are improved.

The invention belongs to the technical field of end slope mining surrounding rock stability monitoring, and aims to solve the problems of high difficulty in quick laying of optical fibers in a mining chamber and single surrounding rock stability evaluation data. The invention provides a non-access type multi-field coupling test method and system for the stability of mining chamber surrounding rock in end slope mining, and the method comprises the steps: transmitting a composite sensor probe to the depth of a mining chamber through a vehicle-mounted high-pressure gas source in the process that an end slope coal mining machine exits from the mining chamber; a micro-crack acoustic emission event is obtained through a composite sensor probe; acquiring macroscopic displacement field data through earth surface remote sensing equipment; mapping and fusing the macroscopic displacement field data and the microfissure acoustic emission event, and performing inversion to obtain a surrounding rock damage variable; and acquiring an equivalent safety coefficient based on the surrounding rock damage variable, and evaluating the stability of the mining cave surrounding rock. According to the invention, the composite sensor probe is adopted, the problem of long and narrow mining chamber optical fiber adherence coupling can be effectively solved, and continuous and quantitative evaluation of the mining chamber surrounding rock stability is realized through multi-data fusion.

The invention discloses a dust-gas double-channel inhibition and early warning method for an end slope mining chamber and a related device, and relates to the technical field of mine safety and environmental protection, and the method comprises the following steps: obtaining original monitoring data in the end slope mining chamber, methane concentration, temperature, humidity and strain data acquired by a distributed optical fiber sensing module and fog drop current data of an electrostatic dry fog generator are included; inverting the dust concentration based on the fog drop current data to obtain a dust concentration time sequence; inputting the data into a pre-trained Transform-LSTM model, predicting the peak concentration of dust and the peak concentration of methane in the next five minutes, and performing early warning; and inputting the prediction peak value into a model prediction control algorithm to obtain an adjustment instruction of the fog drop flow, the directional air curtain spray angle and the wind speed, and executing a suppression action. Continuous monitoring is achieved through the distributed optical fibers, and methane early warning is 3-4 minutes earlier than that of traditional spot measurement; the static dry fog low water consumption avoids humidity rise and electric conduction risks in the cavern, and the average daily concentration of dust is reduced by 65%; model prediction is accurate, the number of times of gas over-limit shutdown is reduced by 40%, and dust and gas double-channel accurate suppression is effectively achieved.

The application discloses a real-time deviation rectification method and device for end-slope mining track, equipment, medium and product, relates to the field of intelligent track control, and comprises the following steps: acquiring original data of an end-slope coal mining machine; determining a current state according to the original data; determining a continuous action by using a strategy network according to the current state; the continuous action is used for rectifying and controlling the end-slope mining track; the continuous action comprises a differential speed of a caterpillar belt, a pushing speed and a roller pitch angle; the strategy network is optimized based on an evaluation result of a double-value network in a training stage; a cumulative return value is determined by using the double-value network according to the current state and the continuous action; the cumulative return value is used for evaluating the continuous action and optimizing the strategy network. The application can realize real-time deviation rectification of the end-slope coal mining machine track.

The present application belongs to the technical field of end slope mining surrounding rock stability monitoring, aiming to solve the problems of great difficulty in laying optical fiber in the mining tunnel and single evaluation data of surrounding rock stability. A kind of end slope mining surrounding rock stability non-access multi-field coupling test method and system is provided, the method comprises: in the process of end slope coal mining machine exiting the mining tunnel, using the on-board high-pressure gas source to launch the composite sensor probe to the deep part of the mining tunnel;Microcrack acoustic emission events are obtained by the composite sensor probe;Macroscopic displacement field data are obtained by the ground remote sensing equipment;The macroscopic displacement field data and the microcrack acoustic emission events are mapped, fused, and the surrounding rock damage variable is obtained by inversion;Based on the surrounding rock damage variable, the equivalent safety factor is obtained, and the stability of the mining tunnel surrounding rock is evaluated. The composite sensor probe can effectively solve the problem of optical fiber wall coupling in the long and narrow mining tunnel, and realize continuous and quantitative evaluation of the stability of the mining tunnel surrounding rock through multi-data fusion.

The invention discloses a near-slope mining method for a water-containing end slope of a strip mine. The near-slope mining method comprises the following steps: step adjustment; a combing area is determined, and temporary local unwatering wells are built; a profile steel supporting wall is built; building a water-blocking supporting wall; an auxiliary supporting wall is built; and mining in sections and recovering the water layer. According to the cement rock (coal) ash mixing pile, applicability transformation is conducted on a traditional cement soil mixing pile, the strength and impermeability of the cement rock (coal) ash mixing pile made of the gravel, the coal cinder and the coal ash are improved, meanwhile, adverse effects cannot be caused to the mining process, and meanwhile mine area waste can be consumed. Different mixing piles are arranged at different positions in a layered and classified mode, multiple functions of supporting, water prevention, supporting and water prevention and the like are achieved, building construction is conducted in different positions independently, the building construction process is simple, and a safe and stable slope environment and a dry construction environment are provided for slope mining. According to the temporary local drainage well, the excavation depth of the drainage well is reduced, the cost is saved, and the underground water in the mining area cannot be seriously damaged due to the local combing mode.

The present invention relates to a TBM stepping method for open trench excavation of a large negative slope mining inclined shaft, belonging to the technical field of mining inclined shaft construction. The problem that the TBM stepping method often slips is solved. The following steps are included: Step 1: Plane stepping in the horizontal assembly area; Step 2: Arc stepping in the arc-shaped transition section; Step 3: Stepping in the slope section. The present invention is connected to the reverse thrust frame through an anti-slip oil cylinder. Under the action of thrust, the force safety of the reverse thrust frame can meet the shield starting requirements, the maximum stress of the reverse thrust frame is less than the yield requirement, the maximum displacement is within the elastic deformation range, and its overall stability is good, which offsets the tendency of the TBM to slide down and reduces the risk of the TBM slipping.

This application proposes a method for the coordinated optimization of slope morphology and mining procedures in open-pit coal mines with soft rock and composite coal seams. Belonging to the field of open-pit coal mining technology, this method, under the premise of meeting the slope safety reserve coefficient, uses two-dimensional numerical simulation software to design various slope morphologies for each slope region, obtaining slope mining parameters and slope cross-sectional morphology for each scheme during top-down longitudinal mining. Combining the slope mining parameters and slope cross-sectional morphology of each scheme during top-down longitudinal mining, and considering the three-dimensional retaining effect of the internal spoil heap during the tracking and lining process, each slope region is optimized in stages. Three-dimensional numerical simulation software is used to determine the internal spoil heap tracking distance during transverse coal seam mining, ultimately determining the mining parameters, optimized slope spatial morphology, and lining height when transverse and longitudinal mining are carried out simultaneously from bottom to top. This application maximizes the recovery of coal resources covered by end slopes, guides open-pit coal mine operations, and improves the coal resource recovery rate.

The invention provides a method for evaluating the time-varying stability of a slope containing a mining cavern group under the action of blasting vibration, and belongs to the technical field of evaluation of the time-varying stability of the slope containing the mining cavern group. In order to solve the technical problems that the current slope time-varying stability evaluation has limitations in the aspects of accurately representing the influence of a dynamic load effect and a rock-soil body accumulated damage mechanism, and the research on the aspects of the influence of a mining cave group on the slope stability and the slope deformation and damage evolution law under the blasting vibration effect is insufficient, the invention provides the slope time-varying stability evaluation method. According to the technical scheme, monitoring points are arranged on an end slope toe and different elevation steps of the strip mine, blasting data are collected, and dynamic response characteristics in blasting operation are studied; constructing a physical model of a vibration table test according to actual slope spatial morphological characteristics, and researching a dynamic instability evolution mechanism of the slope containing the mining cavern group under the action of dynamic and static loads on the basis of the constructed physical model; the method is applied to stability control of the open pit coal mine end slope mining side slope.