66 results about "Stoping" patented technology

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 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 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 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 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 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 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 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.

The present invention relates to the technical field of coal industry, and in particular to a system and method for transporting an advance reinforced support bracket for a mining face. The present invention transports the advance reinforced support bracket to be withdrawn to a designated position through a closed-loop transport mechanism, thereby realizing mechanized operation of the entire process of advance support, withdrawal and transportation, greatly reducing the manual labor of the advance support, while eliminating the potential safety hazards of the withdrawal, transportation and support of the advance support, and solving the problems of uneven tunnel floor, narrow space, and difficulty in support, withdrawal and transportation of the advance reinforced bracket. The present invention is mainly used for advance support of mining faces, and has great application prospects in coal mines.

The invention relates to the technical field of ore extraction, and discloses a continuous stoping method for a gravelly ore body with a slow inclination angle, which comprises the following steps: S1, respectively tunneling a main transportation ramp and an auxiliary service ramp in footwall rock mass of the ore body, and mutually separating the main transportation ramp and the auxiliary service ramp in space, and the main transportation slope ramp and the auxiliary service slope ramp are respectively used for ore transportation and auxiliary operation. According to the method, a firm and smooth physical isolation layer is constructed on the top of the goaf, a brand new artificial base is provided for subsequent layered stoping operation, and it is ensured that upper-layer ore can cleanly slide and be enriched along the isolation layer after blasting; therefore, the industrial problem that the ore is mixed with the upper waste rock or the filling material under the action of gravity is fundamentally solved, source control over the ore grade is achieved, the dilution rate is greatly reduced, and the resource recovery rate is improved.

The present application relates to the technical field of coal mine underground mining safety, and proposes a thick hard rock stratum anti-burst monitoring and supporting method, the steps of which include: implementing regional rock burst monitoring and local rock burst monitoring on the mining area, the regional monitoring uses a microseismic monitoring system to make the mining area covered by at least five monitoring points with a maximum distance between adjacent monitoring points not greater than 500 meters, and the local monitoring includes coal body stress monitoring and roadway displacement monitoring; according to the monitoring results, pre-decompression boreholes are implemented on the mining face and the excavation face; when the impact danger is monitored, large-diameter borehole danger relief or blasting danger relief is implemented; the effect of the danger relief measures is tested by using the microseismic monitoring method, the drilling cuttings method and the stress online monitoring method; and reinforced support is implemented in the roadway and the mining intensity of the mining face is limited. The present application effectively reduces the occurrence probability and harm degree of rock burst under the condition of thick hard rock stratum, and ensures the safety production of the mining face.

The invention discloses a face-mining opposite-digging dynamic pressure roadway stepping type casing grouting surrounding rock control method, and belongs to the technical field of roadway surrounding rock control. The method comprises the following steps of: synchronously mounting a flexible sleeve in the process of heading and mining opposite tunneling; when the heading-mining opposite-digging roadway heading face meets the stope working face, grouting is conducted on the flexible sleeve within the range of 200 m closest to the stope working face in the roadway heading face; along with continuous advancing of the stope face, the stope face always lags behind the grouting area, and the grouting area steps according to the grouting range of 200 m; according to the method, the effects that grouting is not conducted in the tunneling period, accurate grouting is conducted when dynamic pressure comes, and the stability of a top plate can be controlled without additionally driving a grouting anchor cable are achieved, and the problems that supporting is not stable and grouting cannot be accurately controlled in the face-mining opposite tunneling roadway surrounding rock control process are solved.

The present invention discloses a new method for mechanized sublevel filling mining outside the vein of thin to medium-thick ore veins. The stoping panel is divided according to the prospecting density of the ore vein. A reverse-type development ramp is constructed parallel to the ore vein strike near the footwall / hanging wall of the ore vein in the stoping panel. A reversing chamber is arranged at the reversing point of the reverse-type development ramp. A sublevel connection roadway is constructed every time the reverse-type development ramp rises by one sublevel height. An ore pass outside the vein is connected outside the reverse-type development ramp. During the stoping of the stope, access the ore vein through the sublevel connection roadway, and the mined ore is sent into the ore pass outside the vein through the ore transport equipment via the sublevel connection roadway and the reverse-type development ramp. After the stoping of each sublevel is completed, a filling retaining wall is set at the entrance of the sublevel connection roadway and filling treatment is carried out. After the filling body is cured to the designed strength, transfer to the stoping of the next sublevel until the stoping of this panel is completed. It effectively realizes the safe, efficient and low-cost economic mining of lower-value thin to medium-thick ore veins by the sublevel filling method.

The invention discloses a method for predicting the gas emission quantity of a stope face based on pressure relief extraction conditions, which belongs to the field of coal mine safety and comprises the following steps: finely dividing gas emission sources into four parts, namely a coal wall, mined-down coal, residual coal in a goaf and an adjacent layer, respectively establishing emission quantity calculation models of the sources, and calculating the emission quantity of the coal wall, the mined-down coal, the residual coal and the adjacent layer; and a pressure relief extraction correction coefficient is introduced in adjacent layer calculation, and a comprehensive prediction mathematical model is constructed. According to the method, the prediction precision is remarkably improved, working face gas control and safe recovery are effectively guided, the defects that in the prior art, conservative estimation is too high, and the control cost is high are overcome, and reliable technical support is provided for efficient and safe production of a mine.

The application discloses a kind of interval filling mined-out area stoping inter-column methods of steep ore body, it is related to underground mining technical field.The inter-column method of stoping includes: obtaining interval mined-out area quantity, according to interval mined-out area quantity, obtaining to be filled mined-out area;The inter-column on the both sides of to be filled mined-out area is closed treatment;Fill to be filled mined-out area, collapse the inter-column in the mined-out area not filled;The inter-column that collapses is transported out through the ore drawing structure of recovery mine house between filled mined-out area.The way of gradually recovering inter-column is improved by interval filling, the efficiency and safety of inter-column stoping, reduce the loss of dilution of inter-column stoping, reduce the amount of development engineering, can also realize the effective management to mined-out area, realize the purpose of safe stoping.

The invention provides an advanced roof breaking pressure relief method for rock burst prevention and control of a stope face, and relates to the technical field of rock burst prevention and control of coal mines. According to the advanced roof-breaking pressure relief method for rock burst prevention and control of the stope face, aiming at the difficult problem of rock burst prevention and control of advanced roof-breaking pressure relief at present, blasting parameters such as the distance, the number and the depth of blasting holes of a key layer in front of the working face are accurately determined, so that the key layer is accurately blasted; and the maximization of the pressure relief effect and the effectiveness of disaster prevention and reduction are ensured. According to the method, on-site implementation is facilitated, meanwhile, the on-site construction amount is small, the key layer can be rapidly blasted, and safe and efficient mining of the lower coal seam is guaranteed. Complex construction equipment is not needed, the on-site construction technology is simple, problems are not prone to being generated, adaptability to various geological conditions is high, and wide application prospects are achieved.

The application discloses a structural arrangement mode suitable for safe and efficient mining of gently inclined medium-thick ore body, which divides the ore body into panels as mining units, arranges an upper along-vein roadway (1) at the upper part of the panel, arranges a lower along-vein roadway (2) at the lower part of the panel, arranges a through-vein inclined roadway (3) to connect the upper along-vein roadway (1) and the lower along-vein roadway (2), arranges an upper entry flat roadway (4) in the ore body from the upper along-vein roadway (1) in sequence, and adopts horizontal blast hole (6) advancing type stoping, arranges a lower entry flat roadway (5) in the ore body from the lower along-vein roadway (2) in sequence, and adopts horizontal blast hole (6) advancing type stoping, arranges a downward blast hole (7) in the upper entry flat roadway (4) for retreating type stoping, and arranges an upward blast hole (9) in the lower entry flat roadway (5) for retreating type stoping. Ore transportation in each step of the method is completed in the flat roadway, the working efficiency of the shovel-truck is greatly improved, the risks such as overturning and side turning of the shovel-truck are reduced, and safe and efficient mining of the gently inclined medium-thick ore body is realized.