94 results about "Stoping" patented technology

The rock burst prevention and control method for the overlying goaf stoped through the coal mine working face comprises the following steps that S1, according to the position of the overlying goaf of the coal mine working face, a rock stratum located above the coal mine working face and adjacent to the overlying goaf is divided into a fracturing target area; s2, a drill hole is formed in the fracturing target area; and S3, before stoping is carried out on the stoping working face, liquid is injected into the drill holes in the fracturing target area so that hydraulic fracturing can be carried out on the fracturing target area. Therefore, the method for preventing and controlling the rock burst through the overlying goaf stoped on the coal mine working face has the advantage that the rock burst can be conveniently prevented from appearing.

The invention relates to the technical field of underground mining methods, and provides a thin vein group step-by-step efficient continuous stoping method which is used for collecting ore bodies in an ore block, the ore block comprises at least two ore bodies, the ore bodies are vertically arranged, a stone clamping layer is arranged between every two adjacent ore bodies, and the first ore body, the stone clamping layer and the second ore body in the ore block are sequentially arranged. Comprising the following steps that S10, a first ore body is mined, and a first goaf is formed; s20, blasting the stone clamping layer part, and filling the first goaf with broken stones obtained by blasting; and S30, a second ore body is mined. By means of the technical scheme, the problems that in the prior art, the mining efficiency of the steeply-inclined thin vein group containing the multi-layer clamping stone is low, and large-scale automatic mechanical equipment is difficult to apply are solved.

The invention provides a mining method for a medium-thickness ore body, which relates to the technical field of mining methods, and comprises the following modular processes: precise division of three-dimensional ore blocks: based on three-dimensional modeling data of the ore body, arranging segmented haulage roadways along the trend at an interval of 8-12m, dividing stoping units according to the height of 4-8m in the vertical direction, adopting a horizontal staggered distance of 5-10m for adjacent segments, and adopting a horizontal staggered distance of 5-10m for each segment; a stepped stope face is formed; a stone clamping layer in an ore body is reserved during stoping, the resource utilization efficiency is improved, the ore loss is remarkably reduced through a dynamic ore pillar reserving and local caving collaborative process, meanwhile, surrounding rock mixing is reduced through a presplitting blasting technology, the high-grade ore mining purity is improved, the scene adaptability is enhanced, and the mining efficiency is improved. The limitation of a traditional process on ore rock stability and an ore body form is broken through, medium-stability ore rocks and inclined, multilayer and irregular medium-thickness ore bodies can be efficiently mined, and the application range of mining of non-metal ores is expanded.

The invention relates to the technical field of underground mining of metal ore deposits, in particular to a staged ascending pillar-free large-diameter deep-hole lateral caving subsequent filling mining method, which comprises the following steps of: dividing a steeply inclined medium-thickness ore body into a plurality of stages, and dividing large and small stopes in the stages without leaving pillars; digging a flat-bottom ore removal structure at the bottom of the stope, and digging a rock drilling chamber at the bottom of the stope at the upper stage; digging a cutting well at the end part of the stope and expanding the cutting well into a cutting groove; large-diameter parallel deep holes are drilled downwards in the rock drilling chamber, and lateral ore caving is carried out with cutting grooves as free faces; the caved ore is transported out by a carry-scraper through the flat-bottom ore removal structure; and the stope goaf is subjected to subsequent cemented filling. The small stopes are firstly stoped and filled with the 1: 4 full-tailing cementing material, and after the small stopes are solidified, the large stopes are stoped and filled with the 1: 20 full-tailing cementing material. The method has the characteristic of ascending stoping among stages, and has the advantages that pillar-free continuous stoping is realized, and the rock drilling chamber is used as a flat bottom ore removal structure to be reused.

The invention discloses a steeply inclined thin ore body mining method suitable for broken surrounding rock conditions. The method comprises the following steps that S1, engineering geological condition investigation is conducted on an ore body and surrounding rock of the ore body, and stope structure parameters are determined; s2, the ore body is divided into chambers and pillars in the trend according to the length of a stope, and continuous stoping is conducted in two steps; s3, a stope preparation cutting project is constructed in the stope; s4, arranging a slope ramp at the middle position of the ore body close to the ore body, constructing a connection roadway to the other side of the ore body from the slope ramp to the ore body, then constructing stoping access roads from the side, close to the side with good surrounding rock stability, of the vertical connection roadway to the two sides, and performing stoping filling step by step; s5, filling is carried out after the first layer is stoped, stoping of a second layer is carried out after filling is finished and design strength is reached, and circulation is carried out until stoping of the stope is finished; through the arrangement of the spiral slope ramp and the layered platforms, the distance between the slope ramp and the stope is reduced, the work amount of the connection roadway is greatly reduced, meanwhile, each layered platform is responsible for one layer, the gradient of the connection roadway is reduced, and ore transportation and equipment operation are facilitated; and meanwhile, the problems that when the steeply inclined thin ore body under the broken surrounding rock condition is exploited in an upward horizontal layered mode, the broken surrounding rock spans, even an ore body top plate cracks, and the safety of stoping operation of personnel under the cracked top plate is poor are solved, and the method has the advantages of being high in safety, efficiency and mechanization rate and the like.

The invention provides a downward parallel medium-length hole sublevel filling mining method for a low-grade broken ore body, belongs to the technical field of mining, and solves the problems that a traditional mining method is low in mining efficiency and high in cost under complex geological conditions. Downward parallel medium-length holes are adopted in each section for drilling and blasting, efficient stoping is achieved in cooperation with remote control ore removal and supporting equipment, an interbed filling technology is adopted in a goaf to be combined with a reinforcing mesh structure to form an artificial roof, stress and displacement changes of a filling body are monitored in real time through a ground pressure monitoring system, and the stoping sequence and supporting parameters are optimized. According to the method, the efficiency and safety problems of a traditional mining method in low-grade and broken ore deposit and three-under resource mining are solved, large-scale, low-cost, safe and efficient mining is achieved, and the method is suitable for ore body mining under complex geological conditions.

The invention provides a bulkhead upper and lower wall raise stepped shrinkage subsequent filling mining method, and belongs to the field of underground mining. An original footwall transportation roadway is used, a hanging wall transportation roadway in the direction of the ore body is tunneled in hanging wall surrounding rock of the ore body, a hanging wall mining raise and a footwall mining raise which are perpendicular to the direction of the ore body are tunneled in the hanging wall surrounding rock and the footwall surrounding rock respectively, and meanwhile a layered connection way is tunneled; an ore removal transverse drift is tunneled in the middle of the bottom of the stud to communicate the hanging wall transportation roadway and the footwall transportation roadway, the ore removal transverse drift serves as a blasting surface, and an upper wall and a footwall are tunneled from the middle to the two ends of the first layer in a shallow hole blasting mode; and according to the tunneling mode from the middle to the two ends, the other layers are sequentially stoped from bottom to top until the studs are stoped, and then the other studs are stoped. The shallow hole blasting mode is adopted, the mode of blasting from the middle of the stope to the two ends of the stope is adopted for stoping, and efficient, safe and high-recovery-rate stoping of the stud is achieved.

The invention discloses a short-distance multi-ore-bed potassic salt ore large-section long-strip comprehensive mechanized mining method, and belongs to the technical field of potassic salt ore deposit mining. The method comprises the steps that a centralized transportation roadway is arranged on an upper head mining layer, an auxiliary transportation roadway is arranged in a stable salt rock interlayer between ore layers, and combined development is achieved; arranging large-section long strip chambers in the ore blocks along the inclination direction, and reserving permanent spacing strip pillars to maintain the stope to be stable; a chamber is cut and formed at a time by a double-arm large-mining-height mining machine, and efficient stoping is realized by matching with a continuous transportation system; multiple ore beds are mined in a coordinated mode from top to bottom in sequence, and the ore block air return way and the ore block air return way of the upper ore bed are staggered by 20 m or above so as to avoid stress superposition; a full-air-pressure ventilation system combining a press-in type and a draw-out type is constructed; natural supporting is achieved through permanent spacing strip pillars and natural top and bottom plates, safety is guaranteed through a micro-seismic and top plate monitoring system, and the goaf is backfilled with tail salt slurry to achieve green mining. According to the method, safe, efficient and high-recovery-rate mining of the short-distance multi-ore-bed sylvite ore is achieved.

The invention discloses a double-column shallow hole ore breaking two-step shrinkage subsequent filling mining method, and belongs to the technical field of underground mining. Arranging a cutting project to form a stoping space; the jambs are divided into hanging wall jambs and footwall jambs, the footwall jambs are stoped, and filling is carried out after ore removal; and the hanging side pillar is stoped. According to the scheme, the footwall pillars are firstly stoped and filled to form the supporting body, and the hanging wall pillars are stoped later, so that the exposure of the whole goaf is avoided, and the possibility of surrounding rock instability caused by recovery of the pillars in the tall and large goaf is reduced; the filling bodies replace the pillars to bear the pressure of the top plate, so that the permanent pillar remaining amount is reduced, and the recovery rate is increased; the goaf is closed in time after filling, surrounding rock movement is restrained, and therefore the problem of surface collapse is avoided; and the pillars are divided according to the positions and the rock mass stress, stoping is conducted in sequence, the stress superposition risk of synchronous stoping is reduced, and therefore the high-safety stoping method for the pillars between the ore bodies is provided.

The invention relates to the technical field of coal mining, in particular to a method for determining the stability of a caving roof during layered stoping under a large-dip-angle layered mining working face. According to the method, the coal seam stability of the working face is analyzed through calculation of the minimum staggered distance of the goaf and the working face, the shortest time of goaf compaction and fuzzy clustering analysis, and the method for determining the stability of the caving roof during layered stoping under the large-dip-angle layered mining working face is provided. Comprising the following steps: S100: carrying out basic parameter test and statistics on coal and rock masses and interfaces at a stope face and a top plate and a bottom plate of the stope face, and peeping top plates of a transportation crossheading and an air return crossheading; s200, respectively calculating the minimum staggered distance of the goaf and the working face according to the supporting pressure superposition and the stability of the goaf; s300, the shortest compaction time of the goaf is calculated; and S400, mining the stability of the regional coal seam through the fuzzy clustering index.

The invention provides an upward horizontal layered filling mining method suitable for multiple thin to extremely thin ore veins, and belongs to the technical field of mining. The mining method comprises the following steps of: dividing an ore body into corresponding middle sections, sections and layers, and tunneling stope connection ways from section roadways to the layers, so that the stope connection ways entering the layers penetrate through each vein between an upper wall and a lower wall; undercutting and tunneling in each vein along the trend of the ore body on the two sides of the stope cross gateway to form undercutting roadways, reserving ore pillars on the two sides of the stope cross gateway, and starting to expand the outer sides of the ore pillars, coping and stoping a room; after stoping and filling of the chambers are completed, stoping and filling are carried out on stope connection ways and pillars on the two sides of the stope connection ways; and then stoping and filling are conducted on all the layers in sequence from bottom to top. Through the mode, the method provided by the invention can realize continuous operation of mining and filling while ensuring safe stoping of multiple thin to extremely thin ore veins, reduce dilution loss and improve economic benefits of mines.

A downhole treatment method for coal mine water. By means of the method, mine water is purified downhole; the mine water is preliminarily purified by using a first goaf (60) located in front of a stope working surface (50) where stoping is being performed; and a concentrated brine is sealed by using a second goaf (60) located in front of a stope working surface (50) where stoping is being performed. A water treatment device is placed in an existing downhole roadway chamber, such that no ground land is occupied; the mine water treatment cost is reduced by using the self-purification effect of fallen rock mass in the goaf (60); and the deep-treated concentrated brine can be stored in a suitable goaf (60), thereby avoiding the risk of solid waste pollution caused by crystalline salt generated after crystallization and evaporation.

The invention discloses a coal mine goaf and stope face air leakage pressure difference testing method, and relates to the field of coal mine safety. Hosepipes are embedded in an air inlet way and an air return way of the stope face in advance, and the pre-embedded hosepipes can continuously go deep into the goaf along with advancing of the stope face; one end of the outer side of the hose embedded in the goaf is connected with an inclined differential pressure gauge; a leather dragging pipe is arranged on the coal mining stope face; the pressure difference between the whole stope face and the goaf is obtained by changing the position of the pitot tube on the stope face; through multiple times of measurement, the pressure difference change rule of the whole coal mining stope face in different time periods and different positions in the goaf can be obtained. The hose is embedded in the goaf, the pitot tube is arranged on the stope face, and the inclined differential pressure gauge is connected, so that the air leakage pressure difference between the coal mine goaf and the stope face can be simply, accurately and quickly measured.

The present application relates to coal mining method field, especially a kind of underground mining and filling integrated mining and filling working face interphase coal mining method.Firstly, transport roadway and air return roadway are excavated;Interval arrangement filling working face and longwall working face with suitable width;Then, advancing type stoping and filling of filling working face are carried out;After the stoping and filling of filling working face on both sides are completed, and transport crossheading and air return crossheading are left for longwall working face, longwall working face is mined by retreating type full caving method;Such mining is carried out for the whole mine seam.The present application uses narrow face for filling working face, and uses wide face for longwall working face, so that coal production demand, gangue production capacity and crossheading intensity demand are matched.Filling working face uses advancing type mining, and uses filling body to form crossheading and crossheading directly, which are used for retreating type mining of longwall working face, and the whole coal mining process almost does not need to excavate crossheading, and the crossheading intensity formed by filling body is large, which reduces support workload and can ensure safety.

According to the coal mine stope face roof anchor rod temporary support filling mining method, due to the fact that a closed space is difficult to form behind the non-filling hydraulic support, in the upward mining process, the highest layer of filling slurry does not exceed a support base, under the condition, high-concentration cemented filling slurry is filled into a goaf, and the high-concentration cemented filling slurry is filled into the goaf; after a filling step pitch, anchor rod temporary support is carried out on a top plate of the empty roof area in time, the triangular empty roof area of the previous filling cycle is filled in the filling process, and finally filling mining of the whole goaf is completed, so that the input cost of a coal mine is relatively reduced, and the economic benefit of the coal mine is increased; and the contradiction between filling mining and corollary equipment is solved. And a new thought is provided for the filling mining method for temporarily supporting the high-concentration cemented filling slurry by using the top plate anchor rod.

The utility model discloses a hydraulic support adjusting and moving device, and relates to the field of hydraulic support mounting equipment for a stope face of a coal mine. The device is suitable for direction adjustment and installation of downhill supports and conventional supports. According to the technical scheme, the device comprises a sliding table, a traction mechanism installed on the side face of the sliding table and a pushing mechanism installed in the sliding table. The sliding table comprises a downhill-following support sliding table and a pushing sliding table which are detachably connected, the length of the downhill-following support sliding table is smaller than that of the pushing sliding table, and the downhill-following support sliding table and the pushing sliding table are hinged into a whole through a hinge. The utility model has the beneficial effects that a series of safety accidents such as roof fall, collapse and the like possibly caused by overlong unsupported roof distance are effectively avoided while the downhill support and the conventional support can be smoothly dragged to the sliding table. The utility model fundamentally solves the problem that the traditional equipment is difficult to be simultaneously applied to the construction of downhill supports and conventional supports, and has the advantages of exquisite structure, convenience in operation, good construction effect and the like.

The application discloses a kind of slow incline broken non-coal ore body multi-mechanical combined mining method containing interlayer;It relates to the technical field of ore mining, comprising the following steps: S1, according to the ore Proctor coefficient, the mechanical mining equipment of upper and lower layers of ore body is selected, the corresponding mechanized non-blasting mining method used in upper and lower layers of ore body is determined;S2, the upper and lower layers of ore body are divided into multiple panels along the strike, and the corresponding mining preparation cutting engineering is arranged according to the mechanical mining method determined by the upper and lower layers of ore body;S3, the corresponding stoping and ore drawing engineering is carried out according to the mechanical mining method determined by the upper and lower layers of ore body;S4, the corresponding filling engineering is carried out according to the mechanical mining method determined by the upper and lower layers of ore body.The present application is based on the optimization and improvement of the single mining machine fully mechanized mining and the excavation anchor integrated mining method of prior art, and the two kinds of mechanical equipment can be used simultaneously to stop the slow incline parallel multilayer ore vein containing interlayer, realize separate mining and separate transportation, have the characteristics of large production capacity, high safety, small dilution loss, etc., and are especially suitable for the stoping of parallel ore body group with large production scale and the need for separate mining and separate transportation.

The present invention discloses a method for controlling the deformation of surrounding rock of the main tunnel of the underlying mining area during mining of the working face by hydraulic fracturing. First, drilling holes are constructed in the return air level tunnel and the transport level tunnel of the mining working face to the basic top rock layer and hydraulic fracturing is performed to weaken the thick hard rock layer of the basic top, and the pressure step distance of the basic top fracture is reduced; then drilling holes are constructed in the main tunnel of the underlying mining area and the upper mountain of the mining area to the basic bottom rock layer, and hydraulic slit directional hydraulic fracturing is performed to form a weak structural surface in the basic bottom rock layer above the main tunnel of the mining area and the upper mountain of the mining area, blocking the stress propagation path of the mining dynamic pressure to the main tunnel of the underlying mining area and the upper mountain, and reducing the deformation of the main tunnel of the underlying mining area and the upper mountain. The present invention reduces the influence of the mining dynamic pressure on the main tunnel of the underlying mining area and the upper mountain by fracturing the basic top to weaken the mining dynamic pressure stress source and fracturing the basic bottom to block the stress transmission path, thereby controlling the deformation of the main tunnel of the underlying mining area and the upper mountain, and has the characteristics of simple and efficient, convenient construction and low cost.

The invention discloses an interval filling goaf stoping stud method for a steeply inclined ore body, and relates to the technical field of underground mining. The stud stoping method comprises the steps that the number of interval goaf areas is obtained, and a goaf area to be filled is obtained according to the number of the interval goaf areas; sealing columns on the two sides of the goaf to be filled; filling the to-be-filled goaf, and caving the studs in the unfilled goaf; and the caved intermediate columns are transported out through an ore removal structure of a recovery chamber located between the filling goaf. By means of interval filling and step-by-step recycling of the studs, the stoping efficiency and safety of the studs are improved, the loss and depletion of stoping of the studs are reduced, the mining preparation work amount is reduced, and the goaf can be effectively treated, and the purpose of safe stoping is achieved.

The application aims to provide a goaf and mining area gas combined extraction method, and belongs to the technical field of gas extraction. In the working face or the inclination direction of the stoping working face, a bare hole horizontal hole is constructed in the roof of the proposed mining fractured zone. A bare hole packer is seated in the extraction pipe string to seal before the inclined point of the horizontal section, so that the extraction pipe string can extract and control the goaf gas. The extraction pipe string and the annulus between the bare hole wall can extract the mining area gas. When the goaf advances to the next working face, the bare hole packer of the extraction pipe string is unsealed in advance, and the pipe string is lifted. The inclined drilling tool is lowered and landed on the side 50m close to the air return roadway in the new goaf to be formed. The extraction pipe string with the bare hole packer is lowered in the hole again, and the above steps are repeated to realize the rolling combined extraction of the mining area and goaf gas.

The utility model relates to the technical field of coal mine, concretely relates to a coal mine stoping working face supporting device, and the inside fixed connection of side frame has the bearing bar, and the both sides of bearing bar all have the support plate through the pin shaft rotation connection, the inside fixed connection of side frame has the support plate, and the upper portion one side with the lower portion one side of support plate all have the second air cylinder through bolt fixed connection, one side of two support plates all have the connecting plate fixed connection, and one side of two connecting plates all have the sliding block slidingly connected, the output shaft of two second air cylinders all penetrates support plate, realized the adjustability of support assembly whole height, solved the problem that the supporting device was difficult to carry out longitudinal adjustment according to roof height change in the prior art, improved the adaptive capacity of device to different mining height conditions, avoided the phenomenon of not in place or stress concentration due to height mismatch.

The utility model belongs to the technical field of mining equipment, and particularly relates to pin drawing equipment for dismounting an underground pin shaft, which comprises a support plate, a tensioning pump is arranged at the top of the supporting plate; a first through hole is formed in the supporting plate; the tensioning pump is connected with an anchor cable, and the bottom of the anchor cable penetrates through the first through hole. A KM18 type lock is arranged on the anchor cable; the KM18 type lock is rotationally connected with a fixing ring; the bottom of the fixing ring is fixedly connected with a first threaded rod. A supporting assembly is arranged at the bottom of the tensioning pump. The supporting assembly is used for supporting the tensioning pump so as to solve the problems that when the pin shaft is taken out, a lead screw and a pull hammer are generally used for taking out the pin shaft, but specific construction is tedious, the labor intensity is large, the construction progress is slow, and in the advancing process of a stope face, the direct connection pin shaft is prone to deformation and difficult to disassemble due to frequent pressing of a top plate.

The invention provides a vertical mining method suitable for a steeply inclined thin vein, and belongs to the technical field of vertical mining of mines, and the vertical mining method comprises the following steps: S1, drilling a guide hole in the upper part of an ore body from top to bottom by adopting a directional drilling machine; s2, a raise boring bit is replaced on the lower portion of the ore body, reaming construction is conducted from bottom to top, and a mine vertical roadway is formed; and S3, a vertical mining device is adopted for mining. According to the method, research on related vertical mining devices and mining methods is developed by combining occurrence characteristics and mining technical conditions of the steeply-inclined thin ore vein, and the use conditions and range of the ore deposit are discussed, so that the current situation of lack of mining devices and technologies of the mine steeply-inclined thin ore vein is changed, efficient, safe and economical mining of the mine is realized, and the mining efficiency is improved. The purposes of improving the grade of the extracted ore of the steeply inclined thin vein, reducing ore dilution and improving the economic benefit of the mine are achieved.

The utility model discloses a supporting frame for two-step stoping of an ore body. Relates to the technical field of mining, and comprises two hydraulic frames and a plurality of trusses, and the hydraulic frames and the trusses abut against the side wall of a roadway to support the roadway; the two hydraulic frames are arranged in a roadway in parallel at intervals in the length direction of the roadway, the trusses are arranged between the two hydraulic frames in parallel at intervals, the trusses are connected with the hydraulic frames through connecting rods, and the trusses are connected through connecting rods; through the arrangement of the hydraulic frame and the truss, in the two-step stoping process, the hydraulic frame and the truss support the roadway, the problem that a first-step filling body collapses in the two-step ore body stoping process can be effectively solved, the problem that a second-step ore body is overstocked is effectively solved, and meanwhile the safety of the construction operation environment is guaranteed.

The invention discloses a filling mining method for non-explosive continuous stoping of a gently inclined parallel medium-thickness ore body group. The method comprises the following steps that S1, an ore body group is divided into a plurality of middle sections, sections are divided in the middle sections, and the sections are divided into a plurality of layers; a strip mining mode is adopted in the layer; arranging a middle-section haulage roadway, a mining area slope ramp and a transverse drift roadway which are communicated with one another; s2, excavation and arrangement of accurate mining engineering are conducted, specifically, main accurate mining engineering comprises a transverse drift, a transportation gate road, an air return gate road, a section air return uphill, an air return transverse drift and a section transfer belt roadway; s3, stoping and filling are carried out; the middle section is subjected to overall upward stoping, the layers are subjected to stoping from bottom to top, cemented filling is conducted after stoping of each strip is completed, and after filling of all the strips in the inclined layer is completed, stoping of the next layer continues to be conducted; according to the method, a gently inclined parallel medium-thickness ore body group is considered in a unified manner and is divided into a middle section and a section, an upper layer of ore and a lower layer of ore are linked together through mining and cutting projects such as a transverse drift roadway, a crossheading and an uphill, and simultaneous mining of multiple layers of ore on the whole is achieved; and meanwhile, the mining preparation system of each layer of ore is relatively independent, so that respective mining and respective transportation of the ore body are realized.

The invention relates to the field of mining engineering, and discloses a top plate series support method for crossing a fault and preventing roof caving, which comprises the following steps: before a stope face advances to the fault, obtaining fault occurrence and a fracture range through detection, and planning a support path which penetrates through a fracture zone and goes deep into a deep stable rock stratum; a high-strength hollow grouting anchor cable is installed in the drill hole, full-length under-pressure grouting is carried out, and the loose rock mass is cemented through grout; and after the slurry is solidified, axial pre-tightening force is applied, and the broken rock stratums are connected in series and pressed tightly to form a combined bearing structure. According to different fault fall and stoping working conditions, a bidirectional series connection and deep extension dynamic compensation or side protection linkage strategy is adopted, and a hydraulic support under-pressure top rubbing measure is adopted in a matched mode. Through rock mass modification and deep and shallow part cooperative bearing, the problems of fault fracture zone anchoring foundation deficiency and support failure are solved, surrounding rock deformation is effectively controlled, roof fall accidents are prevented, and stoping safety is guaranteed.

The invention provides a high access step type continuous stoping subsequent filling mining method, and belongs to the technical field of metal mine mining, the mining method comprises the following steps: tunneling a lower layered operation space of an initial stoping unit, carrying out top-lifting construction on an upper layered operation space, and piling up a ramp; stoping the upper layer and then the lower layer until the end; after a goaf is formed through stoping, top-contact-free filling is conducted for the first time, and a circulating operation space is reserved; a first avoiding chamber is tunneled in the cyclic operation space, a lower layered operation space of a next stoping unit is constructed in a top-picking mode, and then the cyclic operation space is filled; a second avoiding chamber is tunneled, a layered operation space on a next stoping unit is constructed in a top-lifting mode, and a ramp is built in a heaping mode; and after the upper layer is stoped, the lower layer is stoped until the lower layer is communicated with the draw shaft, and the rest part of the upper layer is stoped after a third avoiding chamber is tunneled. And after stoping, adopting non-roof-contact filling and reserving a circulating operation space, repeating the working procedures until stoping is finished, and fully filling the last goaf. And efficient mining is achieved by optimizing the stoping and filling process.

The application discloses a mining method for medium-length hole in inclined thick and large ore body, which divides the medium-length ore body into several panels in horizontal direction along the ore body trend and divides the medium-length ore body into several sections in vertical direction, and the ore room and the ore pillar are arranged in interval in the panel, and the ore room and the ore pillar are arranged perpendicularly to the ore body trend. During the stoping, the ore room is firstly stoped, and one section height of the ore room is stoped by using upward fan-shaped medium-length hole; after the stoping of the ore room and the filling maintenance are completed, two section heights of the ore pillar are stoped by using upward fan-shaped medium-length hole and downward fan-shaped medium-length hole; in the vertical direction, the ore room and the ore pillar are alternately upward stoped, and each time stoping is one section height ahead of the previous stoping. The stoping is performed until the panel ore body is completely stoped by using the stoping method. By using the mining method, the panel production capacity is large, and the mining method has the outstanding advantages of simple process, safe and high efficiency, low loss and low mining operation cost.

The invention discloses a method for stoping an ore body with medium thickness or more broken roofs, which comprises the following steps of: segmenting and striping the ore body, supporting the roofs, stoping from a middle section stope at the top of the ore body to a lower section part from top to bottom, and backfilling a filling body in a goaf after the stoping of each stope is finished, the stoping sequence of the stopes of the same section is spaced for stoping; the method comprises the following specific stoping steps: step 1, segmenting according to the height of the ore body, and then striping the ore body according to the width of the ore body and the volume of stoping equipment; and secondly, a top plate part at the top of the ore body is supported through wood supporting columns and steel supports. According to the method, the pillars are used as supports in the stoping process of each stope, the safety of ore body mining is improved, meanwhile, after stoping and backfilling work at the topmost end of the ore body is completed, the filling body at the top of the ore body can be arranged to be combined with the top plate to form the high-strength stable top plate, and potential safety hazards caused by top plate breaking are avoided.

The invention discloses a mining process suitable for an ore body hanging wall as a fault fracture zone. The method relates to the technical field of ore extraction and comprises the following steps that S1, a stope is divided into a plurality of subsection stopes from bottom to top, and each subsection stope is further divided into a plurality of layered stopes from top to bottom; each layered stope is further divided into unit stopes; s2, arranging related mining preparation cutting projects; s3, starting from the lowermost layer, performing access stoping on the layered stope from bottom to top; a stoping inlet road is arranged along the trend of the ore body, and first-step and second-step interval stoping is carried out; s4, when the unit stopes adjacent to the fractured zone are mined, anchor cable grouting supporting is conducted on the fractured zone; and S5, when mining of a single layered stope is completed, filling is conducted on the layered stop.The collapse risk of a roof of a broken zone is effectively controlled through the layered stope division, interval stoping and anchor cable grouting supporting technologies, ore resource losses are reduced, meanwhile, the completeness of filling operation and the feasibility of stoping of adjacent ore bodies are guaranteed, and the mining efficiency is improved. And the method has remarkable safety and economic benefits.