82 results about "Room and pillar mining" patented technology

The invention discloses a house pillar changeable panel upward demix filling mining method. An ore body is divided into an ore house and an ore pillar arranged at intervals along the strike direction; a plurality of house pillars form a panel; a rock trackless preparation system is adopted and comprises a ramp, a rock slice drift, a demix ventilation connection and a rock concentrated ore removal winze; the mechanical upward demix filling mining method is adopted for mining, which mines a slice and fills the slice until the position required by the lower slice blasting compensation is reached. The backstopping order of the house pillars in the panel is the ore house first and then the ore pillar; all ore houses are subjected to upward backstopping at the same time; after a backstopping unit of the ore house is finished, the roof-contacted filling is carried out, and the mining of the ore house is temporarily stopped and the mining of the ore pillar is started; after two backstopping units of the ore pillar are finished, the roof-contacted filling is carried out, and the mining of the ore house is resumed; the abovementioned steps are repeated until the backstopping of the ore block is completed. The invention has the remarkable characteristics of improving the backstopping safety, reducing the resource dilution rate, lowering the support cost, increasing the enterprise profit, and the like.

The invention discloses a room-and-pillar major-diameter longhole inverted-step-like segmented lateral caving subsequent filling mining method for a steeply-inclined medium-thick orebody and gently-inclined and inclined extremely-thick orebodies with steady surrounding rocks at upper and lower panels. The method is characterized in that: an orebody is divided into panels, then the panels are divided into continuous single-stage stoping units, and mining is carried out by using a stoping sequence of stoping one unit every other unit, i.e., mining a room at first and a pillar next; when mining a room, a V-shaped trench bottom structure is employed, a longhole drilling chamber is arranged at the upper part of stope, bar-shaped pillars are left to support the top plate of the chamber, a down-the-hole drill is used for drilling rocks, an explosion mode of light section VCR method underholing inverted-step-like lateral caving with a common emulsion explosive is employed, access roads towards the room for ore removal are arranged in the pillars, and cemented roof-contact filling is employed; and during stoping of the pillars, access roads for ore removal are dug towards the pillars in cemented bodies in the room, a stoping manner for the pillars is identical to that for the room, and non-cemented filling with tailings and waste is employed. The method provided by the invention has the advantages of high security, a low production cutting ratio, great production capacity, low operation cost and small loss and dilution of resources.

The invention discloses a room and pillar type medium-length hole filling mining method using bottom ore withdrawal structures simultaneously arranged in original rock. The method comprises the following steps of: dividing an ore body into rooms and pillars arranged at intervals along the tendency, wherein a plurality of room and pillar stopes form a plate region; selecting an extra-pulse trackless development system; sequentially recovering the rooms and the pillars in the plate region; performing retreating row-by-row recovery from the second subsection during room recovery; filling a subsection of a goaf by adopting cement tailing with high cement-sand ratio after ore withdrawal of the rooms, then filling with cement tailing with low cement-sand ratio, and filling the top; recovering the pillars by using the same method as the room recovery from the first subsection during pillar recovery; filling a subsection of a goaf by adopting cement tailing with high cement-sand ratio after ore withdrawal of the pillars, then filling with plain tailing, and filling the top; and after recovery of the whole ore block is completed, reclaiming by adopting an access method. The method has the remarkable advantages of high stope production capacity, high mining work efficiency, high recovery rate, safe operation, low production cost and the like.

The invention discloses a diagonal ore-break-down medium-length hole mining method for a steeply-inclined thin vein ore body. The method comprises the following steps: arranging a stope according to the strike of the ore body, dividing rooms, pillars and sections according to the inclination direction of the ore body and arranging a level haulage roadway along the vein of the ore body from the footwall of the ore body; driving ore-drawing crosscuts into the ore body from where the level haulage roadway is located; horizontally arranging an undercutting roadway along the vein and parallely driving rock-drilling prospecting rises along slant height; arranging ore drop shafts to abut against the haulage roadway; starting stoping from one side of the stope, stopping stoping when the undercutting roadway is driven to the position of the first rock-drilling prospecting rise and then driving the rock-drilling prospecting rise; allowing a medium-length hole drilling machine to gradually travels from undercutting roadway to rock-drilling prospecting rise, drilling medium-length upward blast hole, carrying out denotation and drawing ore out from the bottom ore-drawing crosscuts; and after the first rock-drilling prospecting rise reaches a certain position, continuing driving the undercutting roadway until the position of the second rock-drilling prospecting rise is arrived at, carrying out medium-length hole mining, and repeating the above-mentioned operations until stoping of the stope is completed. The diagonal ore-break-down medium-length hole mining method has the advantages of high production efficiency, great production capacity and good operation security.

The invention discloses a bag reserved tunnel active roof-contacting room and pillar type pillar stoping method. The method comprises the following steps of a, according to the pillar and goaf distribution conditions, dividing the goaf into a reserving space and a to-be-filled space, and exposing at least one side of each pillar to the reserving space; b, putting a filling bag into the reserving space, and building a temporary filling retaining wall at an outlet of the goaf; c, filling the to-be-filled space; d, filling the air into the air bag, and extruding the filling slurry by the expansion action of the filling bag, so as to enable the filling slurry to actively and comprehensively contact top; e, after the filling body in the to-be-filled space is cured, detaching the temporary filling retaining wall, and removing the filled bag; f, using the reserving space as a working surface and a free surface to stope the pillars; g, after the pillars are stoped, treating the goaf. The method has the advantages that the adding of mining and cutting works, and the tunneling of filling body are not needed; the pillar stoping technology is simple, the resource recycling rate is high, the production efficiency is high, the safety is good, and the environment adaptability is good; the method is suitable for the pillar recovery and the goaf treatment after the room and pillar type mining.

The invention provides a steeply inclined ore body room-and-pillar mining method, comprising the following steps: a traveling roadway is tunneled along the trend of the ore body; broken-ore troughs are tunneled in the traveling roadway at interval with the broken-ore troughs as junctions, two inclined shafts are tunneled toward the uphill direction to the top of a quarry; a rhombic ore block formed between the inclined shafts is mined from top to bottom in sequence; ore pillars are left in the rhombic ore block at interval; ores mined in the process of tunneling slip into the broken-ore troughs along the inclined shafts depending on self weight and then put into a mine car in the traveling roadway from the broken-ore troughs to be delivered; the tunneled inclined shafts in networked cross distribution can serve as a passage and an ore chute for the miners to go up and down and as a ventilation shaft and a workplace for rock drilling, ore breaking and blasting avoiding. The method is good in ventilation effect, safe, reliable, low in cost, simple in construction operation, high in ore recovery ratio and low in dilution ratio.

The invention provides a room-and-pillar coal mining method which comprises the following steps: (1) chemical filling material is adopted to fill the bordroom after mining so as to support the top plate of the bordroom; (2) coal pillars remained at both sides of the bordroom are recovered; and (3) sealing is carried out to the mining area. By adopting the room-and-pillar coal mining method, not only the total recovery rate of coal resources can be greatly improved, but also safe production can be ensured.

The invention discloses a continuous striping bag-filling room and pillar type gob pillar stoping method. The method comprises the following steps of a, according to the pillar and goaf conditions, dividing a goaf into goaf stripes and pillar stripes containing a plurality of pillars; b, filling the goaf stripes; c, after the goaf stripes at both sides of each pillar stripe are filled, stoping the pillars in the pillar stripes; d, repeating the steps b and c, and stoping the next pillar stripe; e, after all pillars in the goaf are stoped, performing post-goaf treatment on the pillar stripes. The method has the advantages that the stoping technology is simple, and the production efficiency is high; the recovery rate of pillars is high; the safety is good, and the environment-friendly effect is realized; the cost is low; the method is suitable for room and pillar type pillar stoping and goaf treatment, especially slow-tilting ultrathin to thin ores.

The invention discloses a multi-means complicated condition detection method of a residual mining area, relates to the field of residual coal repeated mining and aims at the problem of damage and waste to a large amount of resources caused by a non-standard mining method such as traditional room and pillar mining and roadway pillar mining. By the multi-means complicated condition detection method,technologies such as ground transient electromagnetic exploration, a working surface transient electromagnetic method, an audio cataphoresis method, a radio wave gallery perspective method, a single-point seismic method, slot wave seismic method detection and coal destruction numerical simulation analysis are integrated. A means is provided for detection of coal bed hoisting, gateway distributionand ponding condition, and moreover, the coal recycling rate is substantially improved.

The invention provides a method for longwall recovering of room and pillar goaf remaining coal pillars. The method comprises the steps: according to mine conditions and material characteristics, components and proportions of the components of cemented backfill adopting coal as aggregate are designed; a filling station is built, the coal is broken, and the cemented backfill is prepared; backfill slurry is conveyed to a down-hole room and pillar goaf through a pipeline to enable the room and pillar goaf to be full; after the cemented backfill is solidified to the designed strength, a longwall working face is arranged in the room and pillar goaf which is full of the cemented backfill; and stoping equipment is mounted, and the room and pillar remaining coal pillars and the cemented backfill are mined and recovered together. According to the method for longwall recovering of the room and pillar goaf remaining coal pillars, a mining method is simple and mature, safety is good, the yield is high, the cemented backfill adopts the coal as the aggregate, thus the remarkable advantages that the cost is low, material obtaining is convenient, and the coal quality is not influenced after stopingare achieved.

The invention provides a continuous mining method in a vertical direction and application thereof to full ore body continuous mining. The continuous mining method comprises the following steps: dividing an ore body into a plurality of middle sections, alternately dividing the middle sections into rooms and pillars, and numbering the rooms and the pillars; taking three middle sections as an example, sequentially mining upper sections and middle sections of the odd-numbered stopes, filling the upper sections and the middle sections of the odd-numbered stopes with cementing materials, and filling the bottom part with high-strength cementing materials with certain thickness; sequentially mining lower sections and middle sections of the even-numbered stopes, filling the top and bottom of the lower sections as well as the bottom of the middle sections of the even-numbered stopes with high-strength cementing materials with certain thickness, filling the rest part of the lower sections with cementing materials, and filling the rest part of the middle sections with non-cementing materials; mining the upper sections in the even-numbered areas, and then filling the sections with non-cementing materials; and mining the lower sections of the odd-numbered stopes, then filling the bottom of the lower sections of the odd-numbered stopes with high-strength cementing materials, and finally filling the rest part of the lower sections with cementing materials. In the invention, the triangular pillars and the high-strength cemented filling bodies of a bottom structure form an isolation layer, and the isolation layer replaces virgin rock level pillars. By utilizing the continuous mining method, top-down continuous mining of the ore body is realized.

The invention relates to a coal mining process of a drilling, loading, conveying and anchoring integral machine, which is characterized in that the drilling, loading, conveying and anchoring integral machine is equipped in a digging work surface of a stripped room, a machine head of a second belt conveyer is in lap joint on the tail part of a movable belt conveyer, and three groups of advanced supporting and protecting brackets are equipped and arranged at a through opening of the stripped room. The coal mining process consists of two parts: a process before the perforation of the back mining stripped room and a return airway and a coal mining process of the drilling, loading, conveying and anchoring integral machine during the two-wing recovery of the back mining stripped room, i.e. firstly, before the perforation of the back mining stripped room and the return airway, fore-mining is carried out in posts of the stripped room, an anchoring net is adopted for supporting and protecting, and the circulation progress is between 0.8 and 2.5 m until the return airway is perforated; and secondly, the two-wing coal is recovered in a backwards retreating mode, the recovery sequence between the posts of the stripped room adopts the backwards retreating mode, and advanced supporting and protecting is adopted during the recovery of the two-wing coal posts instead of the anchoring net supporting and protecting. The invention adopts advanced technical equipment, middle-size and small-size coal mines with exhausted resources can realize the repeated mining, and the coal posts and corner coal in large-size and middle-size coal mines can be recovered.

The invention discloses a gently-inclined broken thin lode medium-depth hole mining method. According to the mining method, the sizes of ore rooms and ore pillars are determined according to the mechanical properties of rock mass and the explosion power cast blasting energy distance so as to rationally divide and arrange the ore rooms and the ore pillars; medium-depth blast holes are drilled in the ore pillars, and ore mining is performed; and by combing explosion power transportation and mechanical transportation, the caving ore is transported, such that the safe and efficient mining is performed on the gently-inclined broken thin lode. According to the present invention, by using the medium-depth mining ore extraction method, the operation of the construction personnel under the stope roof can be avoided so as to ensure the safety of the construction personnel and improve the production capacity and the production efficiency of the stope; by using the explosion power transportation technology, the caving ore transportation efficiency is improved, the mining cutting engineering arrangement is optimized, the mining cutting engineering amount is reduced, and the mining process is simplified; and with the method, the problems of low production efficiency, high safety risk of the construction personnel and the like of the traditional room and pillar method can be effectively improved, and the wide practicality is provided.

The invention relates to a room-and-pillar mining method for medium-thickness gently inclined ore bodies with waste rock interlayer. The room-and-pillar mining method includes arranging stope along the stroke of the ore bodies, reserving continuous pillars in the stope, and dividing the inside of the stope along the strike of the ore bodies into a plurality of stoping units; carrying out layer mining on the insides of the stoping units in stoping sequences from top to bottom, to be more specific, mining upper ore beds at first, reserving ore beds with certain heights, supporting roofs by the aid of anchor rods, rejecting waste rock in the interlayer between upper and lower ore beds and ultimately stoping the lower ore beds; upwardly advancing stoping from cutting roadways and advancing working faces from one side of the stope towards the other side of the stope along inclined directions in a stepped manner. The widths of rooms are equal to the horizontal thicknesses of the ore bodies. The room-and-pillar mining method has the advantages of safety, high efficiency and low dilution and loss rate.

An electric rake-blasting force cooperative carrying false-inclined room-and-pillar method comprises the following steps that an inclined thin ore body which is stabilized through ore rocks or stabilized moderately is divided into stages, an ore horizontal line is arranged at the bottoms of the stages, ore blocks are arranged in the stages, the long axes of the ore blocks are arranged obliquely, and the ore blocks are divided into ore chambers and ore pillars; a gateway is tunneled and cut in the bottoms of the ore chambers, an upward slope is tunneled on one side of each ore chamber, and an air return roadway is tunneled on the tops of the ore chambers, so that stope units are formed; an electric rake chamber and an extraction chute are arranged in a basal pillar; short-hole drilling is adopted, and according to the differences of the blasting mode and the carrying mode, the ore chambers are divided into the upper part and the lower part for back production; the ore rocks fallen from the lower part of the ore chambers are carried with an electric rake; and the ore rocks fallen from the upper part of the ore chambers are carried in a blasting force- electric rake cooperative carrying mode. Finally, the fallen ore rocks pass through an ore discharging structure at the bottom to an ore discharging horizontal line, and after back production of the ore chambers is finished, goaf is treated. According to the method, advantages of the room-and-pillar method and the blasting mining method are utilized sufficiently, and the application range of the room-and-pillar method is enlarged.

A method for recovering room-mining coal pillars by solid filling in synergy with artificial pillars. Solid materials and cementing materials on the ground are conveyed through a feeding well and a pipeline to a room-and-pillar goaf, a plurality of artificial pillars is cast at an interval in a coal room area, and gangue is cast to fill other regions of the coal room using a gangue casting machine. Under joint support by the artificial pillars and the coal room filler, coal pillars are recovered using a continuous coal mining machine, artificial pillars are cast in the original coal pillar area after recovery, and gangue is cast to fill the original coal pillar area using the gangue casting machine. A system for recovering room-mining coal pillars by solid filling in synergy with artificial pillars mainly includes a material conveying system, a joint support system, and a coal pillar recovery system. By constructing pillar grooves, casting artificial pillars, casting gangue to fill a goaf, and recovering coal pillars, the recovery rate of coal resources can be increased, and room-mining coal pillar recovery theories and technologies in China can be enriched while harmonious development of environmental protection and resource exploitation is promoted.

The invention discloses a shallow-buried close-range room and pillar type goaf uplink mining rock stratum stability analysis method, which is characterized by comprising the following steps of: 1, constructing a box girder bridge model; Step 2, determining basic parameters of the box girder; and 3, analyzing the stability of the box girder bridge according to the structural characteristics of thebox girder bridge, wherein the analysis comprises discrimination of the stability of a structural web of the box girder bridge and discrimination of the stability of a room column. According to an existing mechanical theory and a mine pressure theory, the shallow-buried close-range room column type goaf uplink mining system is subjected to mechanical analysis and research according to the box girder bridge structure model, and scientificity, practicability and rationality of determination of stability parameters of the shallow-buried close-range room column type goaf uplink mining system are ensured.

The invention discloses a three-step stoping method suitable for a deep, heavy and large ore deposit. The three-step stoping method comprises the following steps: arranging panels along the directionof an ore body, temporarily reserving barrier pillars among the panels, and dividing the inner parts of the panels into stope rooms and pillars along the direction vertical to the ore body; stoping: step one, stoping the stope rooms, and subsequently, carrying out cement filling by whole tailings; step two, stoping the pillars, and subsequently, carrying out weak cemented filling by the whole tailings; step three, stoping panel barrier pillars, and subsequently, filling by the whole tailings. The step one is used for stoping under a two-side primary ore and rock supporting condition, the steptwo is used for stoping under a two-side cement filling mass condition, and the step three is used for stoping under a three-surface filling mass condition. The three-step stoping method disclosed bythe invention has the following advantages that principles of stress slow release and dynamic balance are fully utilized, the safety conditions of stoping of panel stopes are improved, and regional ground pressure control is facilitated; simultaneous stoping of multiple panels can be carried out, and the production capacity is large; the panel stoping modes are flexible, and the production stabilization can be favorably maintained.

The invention discloses a large area penetrating goaf bag-type filling treating method by areas and by steps. The filling treating method comprises the following steps that a, according to the occurrence situations of a goaf and ore pillars, the goaf is divided into partitions to be filled and blank leaving partitions; b, strip-shaped bag-type filling blocking walls are constructed on the outer periphery of the partitions to be filled; c, the partitions to be filled are filled by steps according to treating orders; and d, filling treating by areas and by steps of the goaf is completed. The technical problems that the blocking and filling treating process of the large area penetrating goaf cannot be controlled, the filling quality is poor and the treating effect is poor are solved. The potential safety hazard of the large area goaf can be eliminated by steps; the influence of the goaf on the earth surface and regional geologic environment can be controlled, and safety accidents caused by the goaf are avoided. The filling treating method is suitable for treating of large area penetrating goafs, especially for gently-inclined ore bodies, and treating of goafs exploited through a room-and-pillar method and a comprehensive method.

The invention relates to the detection on the goaf overlaying strata caving height under a metal mine room-and-pillar method mining conditions. The prediction method is used for determining the physical relation between the overlaying strata height and the ore body thickness, mining depth, construction stress, goaf size and overlaying strata features by using a dimension homogenous principle of the physical law. The method comprises the following steps of firstly, actually measuring on site or indoor measuring the data of the ore body thickness d, mining depth h, construction stress sigma h, goaf area s, rock unit weight gamma, rock loosening coefficient k and hardness coefficient f; substituting the data measured in the step I into a formula: lgH/d=2.1185-1.2359lg gamma ·d/ sigma h+1.3204lgf-3.0502lgk-0.9582lgh/d+0.0114lgS/d2 to obtain the mine goaf overlaying strata caving prediction height H. The method is strong in practicability, safe (without the operation that a person enters a shaft), compact and economic in the complementation process, and avoids the high hazard of the on-site actual measuring on the goaf overlaying strata caving height.

The invention discloses a medium-deep hole room pillar mining method for limestone underground mine mining. The method comprises the steps of: S10. exploiting a ramp, tunneling a first intermediate section haulage roadway along the front end of a to-be-mined stope room from the ramp, and tunneling an air return roadway along the rear end of the to-be-mined stope room from the ramp; S20. dividing an upper sub-layer and a lower sub-layer; S30. stoping the upper sub-layer, tunneling a roof cutting roadway, conducting slope expansion on the roof cutting roadway to form a roof cutting space in the stope room, transporting the ores generated by slope expansion out of the ground surface by the ramp; and S40. stoping the lower sub-layer, tunneling a second intermediate section haulage roadway from the ramp, blasting the lower sub-layer, and transporting the generated ores out of the ground surface by the ramp. The method provided by the invention has the advantages of small mining preparation workload, simple process and good ventilation conditions, etc. The labor production efficiency is high, the mining cost is low, and the ore block production capacity is large. The method can reduce the number of underground workers, shorten ore block stoping time, reduce the exposure time of workers in an open stope, and prevent roof fall accidents, and is a safe and efficient mining method.

The invention belongs to the technical field of mining methods and particularly relates to a medium-length-hole room-and-pillar method of synchronically forming barrier pillars. In the method, an ore body is divided into a plurality of panels by each 100 m, wherein continuous pillars being 5 m in width are reserved between the panels; in the panels, a plurality of ore blocks are arranged by each 20 m, height of the ore blocks being 25-35 m; in each ore block, ore room span is 15 m, width of the barrier pillar is 5 m, size of the barrier pillar is 5*6 - 5*8 m, top pillar is 3 m in thickness and vertical height of a bottom structure is 8-12 m. In the invention, two rock drilling slope heading structures are drilled along the two sides of the ore room, so that the boundary of the ore room is controllable and barrier pillars are convenient to stope. Meanwhile, a goaf has a regular form so that stoping rate of ore is increased. All of the stoping is carried out with the medium-length holes, and medium-length-hole drilling is completed all before the ore break down of the ore blocks, thereby reducing stoping period of the ore blocks; the method achieves the synchronic stoping of the ore in the ore room and the ore in the barrier pillars; along with the advance of the working face, the barrier pillars are formed gradually.

The invention relates to a method for exploiting gently-inclined thin-to-medium-thickness ore bodies. A room-and-pillar mining process of the method includes steps of setting panels; carrying out preparation cutting; carrying out room stoping; carrying out pillar stoping. The method has the advantages that quick rock roadway excavation mechanical matched operating lines are introduced into room and pillar stoping work, accordingly, mechanical operation can be carried out, and the traditional backward technologies for drilling fan-shaped medium-deep holes by the aid of room-and-pillar processesand removing ore by the aid of electric rakes can be transformed; the shortcoming of limit due to the traditional pipeline filling can be overcome by the aid of throwing filling techniques, the method is convenient and flexible, and the problem of contradiction between recycling of pillar resources of the traditional room-and-pillar mining processes and maintenance of the goaf stability can be appropriately solved by the aid of the method.