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9 results about "Room and pillar mining" patented technology
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Room and pillar (variant of breast stoping), is a mining system in which the mined material is extracted across a horizontal plane, creating horizontal arrays of rooms and pillars. To do this, "rooms" of ore are dug out while "pillars" of untouched material are left to support the roof overburden. Calculating the size, shape, and position of pillars is a complicated procedure, and is an area of active research. The technique is usually used for relatively flat-lying deposits, such as those that follow a particular stratum. Room and pillar mining can be advantageous because it reduces the risk of surface subsidence compared to other underground mining techniques. It is also advantageous because it can be mechanized, and is relatively simple. However, because significant portions of ore may have to be left behind, recovery and profits can be low. Room and pillar mining was one of the earliest methods used, although with significantly more man-power.
Method for determining height and length of stope room in staged stope room subsequent filling mining method
PendingCN121580496AGeometric CADDesign optimisation/simulationRoom and pillar miningClassical mechanics
Owner:ZHONGYE-CHANGTIAN INT ENG CO LTD
Construction method for controlling ground pressure of goaf through room-and-pillar method by means of interval type dry material filling
The invention provides a construction method for controlling the ground pressure of a goaf by a room-and-pillar method through interval type dry material filling, and belongs to the technical field of mining engineering. According to the method, a discontinuous supporting system is constructed in a goaf by utilizing the natural accumulation characteristic of a discrete material. The method comprises the following specific steps: firstly, actually measuring goaf roof and jamb states to plan a path; a filling control section is calibrated with 20-30 meters as the standard in the excavation advancing direction, the space between one to two rows of ore pillars is selected in the section to serve as a stress bearing core area, and the rest space serves as a ground pressure release cavity area; then, dry materials are conveyed in a mechanical throwing and filling mode, a blanking point is controlled to take a natural repose angle as a boundary, and a local stable accumulation body for supporting the top plate is formed under the condition that a manual retaining wall is not needed. According to the method, construction is sequentially propelled, so that the filled sections and the unfilled sections are alternately distributed, an interval supporting structure combining rigid supporting and flexible pressure relief is formed, and a construction strategy is dynamically adjusted according to monitoring data.
Owner:YUANAN COUNTY LIAOYUAN MINING CO LTD
Bauxite soft roof advance grouting solidification method
The application belongs to the technical field of roof reinforcement and support in underground mining, and discloses a bauxite soft roof advanced grouting solidification method. The method first acquires direct roof and indirect old roof information, determines the soft direct roof to be solidified, and takes the lithological interface between the soft direct roof and the indirect old roof of dolomite as the bottom control interface of the grouting hole. Then, the advanced grouting hole is arranged according to the working conditions such as mining and cutting roadway excavation, room and pillar mining or room and pillar subsequent filling, and the grouting solidification is carried out by using silicate modified polyurethane two-component material. Finally, the solidification quality is verified by coring, acoustic wave and on-site monitoring, and the roof protection mining and excavation operation is cancelled after the index is met, so that the roof stability and resource recovery rate are improved.
Owner:GUIZHOU UNIV
A method of sublevel room and pillar mining with waste rock trailing
The application discloses a kind of segmented ore room waste rock follow filling mining method, after caving ore mining is completed, before waste rock filling, capsule is arranged in mined-out area, and fluid material is filled in capsule to make it expand to separate caving ore body and filling waste rock, then caving ore body is blasted and mined, capsule is broken under the action of blasting impact, at this time, the volume occupied by capsule disappears, as blasting compensation space in the process of ore blasting, at the same time, broken capsule is located between caving ore and filling waste rock, and it is offset to filling waste rock side with caving ore, which effectively separates caving ore and filling waste rock, and finally, the mining operation is carried out, when shovel loader is loaded to the bottom of broken capsule, the mining operation can be stopped. Then the next operation cycle is continued, and so on. The application can provide free surface for caving ore body blasting, and isolate caving ore and filling waste rock from contact, to avoid dilution.
Owner:PANGANG GROUP MINING CO LTD +1
Resource recovery auxiliary equipment and method for underground mine room-and-pillar mining process
The invention relates to the technical field of auxiliary equipment, in particular to resource recovery auxiliary equipment and method for an underground mine room and pillar mining process. In order to solve the problems that the reinforcing effect and the operation safety are affected due to the fact that the surfaces of jambs which are different in size and are left by an underground mine shallow mining room-pillar method are irregular and the insertion positions of anchor rods are difficult to determine accurately, the following technical scheme is provided: the method comprises a moving trolley which moves around the jambs; the lifting plate is arranged above the moving trolley and can move up and down; the distance sensing mechanisms are installed at the two ends of the lifting plate and used for monitoring the changing curve of the surface of the ore pillar; and the positioning hole forming assembly is arranged between the two groups of distance sensing mechanisms. The surface of the ore pillar is monitored, the moving track is calibrated, the anchor rod positioning accuracy and the concrete reinforcing effect are improved, the manual operation risk is reduced, and the safety and efficiency of mine resource recycling operation are improved.
Owner:CHINA HUAYE GROUP
A method for treating a room-and-pillar mining area by cement filling
The application discloses a kind of room pillar type goaf cemented filling treatment methods, comprising: S1, the goaf is divided into multiple filling areas, and the position of each filling area edge coal pillar and intermediate coal pillar is determined;S2, between two adjacent edge coal pillars, edge hole is punched;S3, laying filling pipe in edge hole, setting filling bag on filling pipe and lowering filling bag into filling area;S4, filling pipe is used to fill slurry into filling bag, so that the bottom of filling bag is stopped on the floor of filling area, and the side of filling bag is stopped on two adjacent edge coal pillars;S5, wait for slurry to solidify;S6, between two adjacent intermediate coal pillars, intermediate hole is punched, and filling area is filled with slurry in sealed space.The application improves the stability of coal pillar, reduces the risk of roof disaster caused by the instability of coal pillar, can reduce the impact of coal mining on the environment, realize green and low-carbon mining, and is suitable for room and pillar type goaf that has taken closure measures, is more simple and convenient to operate, and is easy to implement.
Owner:CCTEG COAL MINING RES INST +1
Multi-adaptive collaborative mining method for gently inclined thin, medium and thick bauxite
The invention discloses a multi-adaptive collaborative mining method for gently inclined thin and medium-thick bauxite. Comprising the following steps that S1, mining areas are divided in the ore body trend, and isolation ore pillars are reserved; s2, a collaborative development network is constructed, wherein the collaborative development network comprises a main adit, a belt transportation main roadway, an air inlet lifting inclined shaft and a belt air return inclined shaft; s3, the mining area is divided into two small mining areas with the two inclined shafts as boundaries, the ore body thickness of each area is determined through exploration, and distribution of thin ore bodies and medium-thickness ore bodies is recognized; s4, multi-process collaborative deployment: deploying a fully-mechanized coal mining system for the medium-thick ore body area; for the thin ore body area, a room-and-pillar method system is deployed; s5, collaborative recovery: deploying an access method system for recovery for an area in which the fully-mechanized coal mining system and the room-and-pillar method system are not deployed; s6, ore transportation and ventilation are conducted through a unified collaborative development network, and efficient and safe mining of the whole mining area is achieved; through the design of one system and multiple processes, the device perfectly adapts to the complex thickness change of gently inclined bauxite from thin to medium thickness, and the industrial problem that water and soil are not suitable for a single method is solved.
Owner:CINF ENG CO LTD
Evaluation method of reasonable turnover empty area of metal mine based on empty area subsequent filling mining
ActiveCN115288690BData processing applicationsUnderground miningRoom and pillar miningMining engineering
The application provides a reasonable turnover empty area evaluation method for a metal mine based on a room and pillar post-filling mining method, which is used for a metal mine adopting the room and pillar post-filling mining method, the ore drawing mode of which is sublevel or stage, and the post-filling, and comprises the following steps: determining the volume of the stope empty area and the number of the stope to be used; determining a production imbalance coefficient and a ratio coefficient of the number of the stope to be mined and the number of the stope to be filled; constructing a reasonable turnover empty area model, wherein the reasonable turnover empty area refers to a reasonable empty area volume when the mining and filling process of the room and pillar post-filling mining method is connected; and based on the reasonable turnover empty area model, the balance relationship between the mining and filling of the metal mine adopting the room and pillar post-filling mining method is evaluated. The reasonable turnover empty area model is established, which is beneficial to further analyzing the balance relationship between the mining and filling, and provides a scientific technical basis for analyzing the balance between the mining and filling of the empty area.
Owner:OCCUPATIONAL SAFETY & HEALTH (BEIJING) TECH DEV CO LTD