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5 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
PendingCN122407235ARoom and pillar miningDolostone
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
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