42 results about "Stoping" patented technology

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 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 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 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 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 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 kind of roadway supporting method and steel shed, it is related to coal mining operation technical field, roadway supporting method, comprising the following steps: starting to drive mining face crossheading;Along the crossheading working help fixed installation first shed leg, along the crossheading non-working help fixed installation second shed leg, in the top of first shed leg and the top of second shed leg fixed installation spliced roof beam, in the splicing of spliced roof beam fixed installation reinforcing support;Lagging behind driving working face along the crossheading non-working help pouring continuous concrete wall;In the process of mining working face advancing, gradually remove first shed leg and first beam body in spliced roof beam;In the back of concrete wall excavate next section mining working face crossheading;The application is more suitable for multiple mining area roadway geological conditions, not only easy to operate, improve construction efficiency, improve the safety factor of roadway support, but also greatly improve the recycling rate of support material, reduce material waste.

The invention belongs to the technical field of underground mining of metal ore deposits, and relates to a discrete cemented filling mining method which comprises the following steps: step 1, arranging a filling roadway above a caving space; 2, a filling pipeline and a monitoring hole are constructed downwards in the caving space through the filling roadway; 3, partial stoping is carried out on the sections to enlarge the caving space, so that the rock mass above the caving space is caved, and then a discrete body and a free space are formed in the caving space; 4, filling slurry is injected into the bulk solids in the caving space through the filling pipeline according to the monitoring result of the monitoring hole on the caving space and the bulk solids; and 5, stopping the mining operation of the subsections, waiting for filling slurry to solidify the discrete body, and continuing to stoping the rest part of the subsections to complete the mining operation of the subsections. According to the monitoring result of the caving space, the filling slurry is injected into the discrete body through the filling pipeline, so that the filling operation and the stoping operation are synchronously carried out, and the mining efficiency is greatly improved.

The invention discloses rapid construction equipment for a large mining height working face. The rapid construction equipment comprises a formwork hanging device for formwork hanging, a self-moving concrete pump for mine concrete pouring, a unit support for temporary supporting and a unit support carrying vehicle. The mold hanging device is arranged close to the end head frame of the working surface; the unit support is arranged close to the flexible formwork wall side by following the formwork hanging device, the self-moving concrete pump is arranged on the flexible formwork wall side in the gob-side entry retaining roadway, and after the pouring distance meets the scheme design requirement, walking is controlled to move forwards through wireless remote control. According to the rapid construction equipment for the large mining height working face, the problem that the entry retaining speed is difficult to follow the stoping speed is solved, and normal stoping of the working face is not affected while the number of operators is reduced and the labor intensity is reduced.

The invention relates to the technical field of mining, in particular to a small-section cutting and stoping integrated medium-depth blast hole arrangement method which comprises the following steps: arranging a row of presplitting holes at the first mining end of a rock drilling roadway close to a stud side; a rock drill is placed below the transition area; a plurality of rows of blast holes are sequentially formed in the rock drill from the vertical angle to the pre-splitting hole direction by reducing angles until the distance from the bottom of the last row of blast holes to the free surface of the roadway roof is equal to or smaller than the minimum resistance line; calculating the limit blasting distance of the transition area; arranging a plurality of rows of blast holes in the distance, and arranging vertical blast holes in the last row; and the vertical blast holes are connected with stoping blast holes, millisecond detonation is conducted in sequence from the blast holes close to the free face, cutting grooves are formed, and stoping is conducted. The method disclosed by the invention has the characteristic of integration of cutting and stoping, and seamless connection of cutting and stoping work is realized.

The application discloses a kind of gently inclined medium-thick deposit full section long drift filling mining method, it is related to mining technical field.The application includes the following steps: (1) panel division;(2) preparation engineering;(3) panel transport system installation;(4) long drift mechanized stoping;(5) long drift filling;(6) continuous production operation.Long drift stope is arranged along the ore body trend, and the upper and lower sections do not affect each other, realize multiple sections in panel simultaneous operation, improve production efficiency;Use shallow hole drilling machine blasting or tunneling machine cutting drop ore, drift filling mining, ore room once stoping is completed, stoping rate is high;Utilize panel belt conveyor roadway and belt conveyor system, solve the problem of ore mining, transport and carry;In the process of stoping, work is realized mechanized operation, operation intensity is low, and operation safety is high;Adopt all tailings and cement as filling material, utilize the flexible characteristics of long drift stope goaf filling method, improve the efficiency of mining and filling cycle, guarantee production capacity and mine safety.

The invention discloses an open stope subsequent backfilling mining method under a long anchor cable pre-control roof, which comprises the following steps of: dividing an ore body into two steps of stoping in a stope room and an ore pillar in a stage, and leaving no pillar between stopes; the stope is arranged perpendicular to the ore body trend, the top of the stope is a roof protection project, rock drilling is conducted in the upper section, and ore removal is conducted in the lower section; mining preparation cutting operation is carried out; after the mining preparation cutting work is completed, upward medium-depth holes are formed in the cutting roadway row by row, and explosives are placed in the deep holes for drilling and blasting; each section is subjected to stepped blasting ore breaking from top to bottom, each rock drilling level is subjected to loosening ore removal by adopting a diesel scraper, and a centralized ore removal level is subjected to shoveling by adopting an electric scraper; and filling the filling roof protection roadway at the top of the stope. The technical problem of collapse in the stoping process in filling mining production is well solved, the stope top plate is pre-reinforced through the long anchor cable, safe and efficient stoping of ore blocks is achieved, and the resource utilization rate is increased.

The invention discloses a combined filling mining method for a micro-inclined thick and large ore body with a broken top plate, and belongs to the technical field of underground mining. According to the method, a staged collaborative mining mode is adopted for solving the problem that safety and efficiency are difficult to consider in mining of micro-inclined thick and large ore bodies with broken roof surrounding rocks. In the first stage, in the whole area of the top of an ore body, an integral artificial roof firmly combined with surrounding rock is constructed through an access stoping process of mining one at intervals, three-dimensional connection of roof anchor rods and reinforcing meshes and a one-time high-strength filling process, and the roof caving risk is controlled fundamentally. And in the second stage, under the reliable protection of the artificial roof, efficient stoping is conducted on the lower ore body through a downward parallel deep hole stage open stoping subsequent filling method, and stope stability is guaranteed and cost is optimized through the sequence of stoping one at intervals and the differential filling strategy of one-step high strength and two-step low strength. According to the method, safe, efficient and low-depletion mining of the thick and large ore body under the condition of the broken roof is achieved.

The invention relates to a two-step strip-type stoping subsequent filling mining method based on a small compensation space, which comprises the following steps of: S1, stoping preparation: determining the stoping length of an ore block, dividing the ore block into a plurality of stoping units, and constructing a stoping roadway which goes uphill in advance and is used as a first mining unit in the stoping unit in the center of the ore block; s2, mining preparation and cutting; s3, stoping and ore breaking are carried out, shallow hole side collapse is constructed on the two sides of the first uphill, and stoping is gradually carried out; s4, ore removal: after ore caving is finished, ore removal is performed, and caved ore is transported and unloaded to a draw shaft; and S5, continuous mining is conducted in the ore blocks, and after filling of the first mining unit is completed, the adjacent stopes are subjected to stoping. According to the method, the construction of one uphill in each stoping unit is reduced to the construction of only one uphill in advance in the whole ore block, so that the accurate mining work amount is greatly reduced, the stoping cost is controlled, and the labor intensity is reduced; the combined supporting structure with the filling body on one side and the solid body on the other side is formed during two-step stoping, and the safety of two-step stoping is effectively guaranteed.

The invention provides a stope face freezing water control method, and relates to the technical field of coal mine water control. According to the stope face freezing water prevention and control method, a hole is drilled in a water-bearing layer at the construction position (roadway or ground) above an overlying rock layer, pipelines are connected section by section and arranged in the hole, plugging particles are injected into the pipelines, liquid nitrogen is injected into the pipelines, the pipelines are pressurized, and the liquid nitrogen drives the plugging particles to be injected into the water-bearing layer; the plugging particles are shrunk under cold and enter cracks of the aquifer, and meanwhile, water in the aquifer is frozen by the liquid nitrogen; in this way, water in the aquifer is frozen into ice slag, and the source of water seepage and water burst of the working face is cut off. Along with the rising of the temperature of the aquifer, the plugging particles expand to the original boundary dimension, and the plugging particles plug the cracks of the aquifer, so that the water seepage and water gushing transmission path of the working face is cut off, the plugging time of the water seepage and water gushing of the working face is prolonged, and normal proceeding of working face stoping operation is ensured.

This application provides a method, device, and system for arranging access roadways. The method includes: during the mining operation, controlling a tunneling machine to excavate a pre-excavated section of the access roadway in the next working face along the excavation direction, with the excavation direction opposite to the mining direction of the mining operation, and the distance between the excavation face of the pre-excavated section and the mining face of the mining operation in the excavation direction being greater than a predetermined distance; controlling the tunneling machine to excavate a goaf-adjacent section of the access roadway in the next working face in the opposite direction of the excavation direction, until the goaf-adjacent section and the pre-excavated section are connected to form the access roadway, with the distance between the excavation face of the goaf-adjacent section and the mining face of the mining operation in the excavation direction being greater than a predetermined distance, and the support capacity of the support system of the pre-excavated section being stronger than that of the support system of the goaf-adjacent section, thus solving the problem in the prior art of severe roadway damage caused by high stress disturbance from adjacent working faces during mining.