53results about How to "Improve stope production capacity" patented technology

In the continuous mining method, ore body are divided into sections, subsections and mini-sections stepwisely along the ore vein; arranging mini-section drilling mine tunnels along the ore vein in the ore body bottom wall and connecting the mini-section tunnels with the main ramp way via linking tunnel; arranging support and filling tunnel along ore vein in the upper wall in the ore section; stoping from two ends to the central part of the bordroom via stepped continuous advance; drilling fanned holes with rock drill machine, breaking ore with rock explosive, charging with charging machine and combined elementary error detonation; filling finished stope via filling tunnel and filling dewatering device; and supporting crushed upper wall roof with deep anchor rod and steel fiber concrete. The present invention has high production capacity, high safety, less ore loss and low mining cost.

The invention discloses a fully-segmented presplitting squeezing primary-blasting mining method. The method comprises the following steps of: 1, performing sublevel mining on slowly inclined thick and large crushed ore bodies; 2, arranging a stope free with a bottom structure along a direction vertical to the direction of the ore bodies; 3, using a trackless development mode of a lower plate outside-vein sublevel tunnel and an outside-vein concentrated winze; 4, constructing a full-section pre-control top tunnel serving as a shoring tunnel and a drilling tunnel; 5, performing presplit blasting so as to form the outline of the stope, squeezing and blasting so as to form a mine, and performing presplitting, squeezing and primary-blasting on the fully-segmented ore bodies to form the mine; 6, concentratively removing the ore by trackless equipment under a fully-segmented open stope; and 7, concentratively filling in a large scale after full segmentation. The method has the remarkable characteristics of high mining safety, simple process, low loss and depletion, high mechanical degree and mining strength, high production capability of the stope, high efficiency, low cost, low labor intensity 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 present invention relates to underground exploitation of phosphorate rock mineral and aims at providing slow inclined middle thick ore body exploiting method. The said exploitation process includes tunneling adit and main inclined tunnel, tunneling middle section main entry, dividing ore body into several panels, tunneling inclined panel slope, dividing the middle section into subsections, dividing subsection ore body into small room via subsection horizontal gallery and cutting raise, supporting roof with anchorage bar and metal net; drilling to bring down with rock drilling machine with cutting raise as free plane; stoping along strike direction; exploding residual ore column to empty area; conveying ore with carry scraper to ore chute and transporting ore with truck. The present invention is suitable for phosphate ore of ore body inclination 0-90 deg and ore body thickness 2-20 m.

The invention relates to a large-structure sublevel drilling stage ore removal mining method with delayed filling. The mining method comprises stoping in stopes and bottom structure recovery which are carried out synchronously in a crossed manner, and comprises the following steps: step 1, stoping in odd-numbered stopes, wherein the stoping manner is sublevel drilling stage ore removal, and mined out space I is not filled immediately; step 2, stoping in 1/2 bottom structures I corresponding to the odd-numbered stopes, and filling ore rooms and the mined out space I, corresponding to the 1/2 bottom structures I, of the ore rooms after stoping is finished; step 3, stoping in even-numbered stopes, wherein mined out space II is not filled immediately; step 4, stoping in 1/2 bottom structures II corresponding to ore pillars, and filling the ore pillars and the mined out space II, corresponding to the 1/2 bottom structures II, of the ore pillars after stoping is finished. The mining method has the advantages that the mining-cutting work amount is reduced greatly; the production capacity of a single stope is high; the efficiency is high; workers' labor intensity is low; production, dispatching and management are simple. Moreover, stoping of the main ore in a stope and recovery of ore in the bottom structure of the stope are realized synchronously in a crossed manner, and the stoping operation is safe, so that the resource recovery rate is high.

A mining method with filling and shrinkage features that the artificial pillar is used to replace ore pillar and the dry filling mining and the shellow-hole shrinkage minining are combined together. Its advantages are good maintenance to upperwall and foot wall surrounding rock, high mining speed and high mining productivity.

The invention discloses a deep hole caving backfilling stoping method for artificially freezing the stope roof. The method comprises the following steps that: by the artificial freezing method, the stope roof which is extremely unstable is frozen into a stable freezing body, which creates conditions for personnel and equipment entering the stope; and by the big-diameter deep hole caving backfilling stoping process, the medium and deep hole caving is applied, the goaf is filled once after stoping is finished, and the freezing body is unfrozen, so that the aim of safely and highly efficiently mining ore mass with extremely unstable roof is achieved. The method is specially applied to stoping of underground metal mines which are highly difficult to mine and of which the roof has rock gaps and a developed water flowing structure and is loose, soft, fragile and extremely unstable, and has the characteristics of safety in operation, high production efficiency, high capacity of producing ore blocks and low mining cost.

The invention discloses an open pit mining method for a gentle tip ore body. The gentle tip ore body is divides into inclined layers with the equal thickness and parallel to a bottom plate of the orebody for mining; a main inlet and outlet is arranged at lower corner of the ore body, and the inclining direction of an inclined transporting channel is opposite to that of ore body; and section opening is conducted in the inclining direction and the striking direction of the ore body, a inverted-L type section opening ditch is formed, and a work line is arranged to be as a step composed of multiple reversed-L working surfaces. According to the open pit mining method, by optimizing the position of the inlet and outlet and arrangement of the transporting channel and adjusting arrangement and propelling direction of the work line and the working surface of an open pit, the fact that a triangle ore belt appears the slope surface of the step is avoided, the resource recovery rate is improved advantageously, dilution is reduced, mining construction organization is simplified, the mining cost is reduced, the blasting effect is improved advantageously, the production capacity of the pit is improved, and the initial development engineering amount and the transporting cost are reduced.

The invention discloses an open stope mining method for a steeply inclined vein ore body. The open stope mining method comprises the steps that a stope is arranged in the moving direction of the ore body, a plurality of rock drilling roadways are formed, the rock drilling roadways are arranged in parallel along a vein at equal intervals in the vertical height direction of the stope, a stope preparation well is formed in the middle of the stope, the widths of the rock drilling roadways and the stope preparation well are consistent with the mining width of the stope, and top columns and studs are reserved in the stope; and the rock drilling roadways and the stope preparation well are used as blasting free faces, and multi-free-face blasting and overall area caving of the ore body in a chamber are achieved. By the adoption of the mining method, mining operation is conducted in the rock drilling roadways, the rock drilling roadways are good in stability, safe and reliable, surrounding rock caving hazards of the stope can be avoided, the operation environment is improved, and the operation safety coefficient is increased; and according to the mining method, the rock drilling roadways and the stope preparation well are used as the blasting free surfaces, the multi-free-surface blasting area is integrally caved, the whole stope is completed through one-time blasting, and the production capacity of the stope is greatly improved.

The invention discloses a descending open stope subsequent filling mining method. The method comprises the following steps of dividing a body to be mined into stopes, and stoping by adopting a medium-length hole or deep hole rock drilling blasting mode; vertically arranging adjacent stopes in a staggered manner in the horizontal direction; and stoping any stope after stoping of the vertically adjacent upper stope and the horizontally adjacent upper stope and filling maintenance. The method is suitable for mining of hard inclined to steep medium-thick ore bodies or horizontal to gently inclinedthick and large ore bodies under the condition that the rock mass of underground metal/nonmetal mines is generally extremely poor or the deep high stress condition, and has the characteristics of high stope production capacity, high stoping efficiency, high mechanical operation degree and the like.

The invention provides a gently inclined minded-out area roof and floor residual ore stoping method. The method is suitable for the stoping operation of gently inclined minded-out area roof and floorresidual ore with high ore grade and good value. A carry-scraper ore output hopper bottom structure is arranged in foot wall rock, a lower-layer ore body is firstly stoped, then an upper-layer ore body is stoped, and finally a minded-out area is filled. When the lower-layer ore body is stoped, an upper old mined-out area is regarded as a free surface and a compensation space, a fan-shaped middle-deep hole is adopted to collapse ore, a part of the ore is output from the inside of the carry-scraper ore output bottom structure, then the fan-shaped middle-deep hole is adopted, a lower mined-out area is regarded as a free surface and a compensation space, the upper-layer ore body is collapsed, collapsed ore is completely output in the carry-scraper bottom structure, and then the mined-out areais filled with a low-strength cemented filling body or a non-cemented filling body. Compared with the prior art, the method has the advantages of safe stoping operation, high stope production capacity, low cost and the like.

The invention discloses a mechanized mining and waste rock filling method for an inclined thin vein. The method comprises the following steps of: stoping an ore body layer by layer from bottom to top by adopting a stope preparation mode of slope ramp development outside the vein, sectional haulage roadway connection and ore removal of a panel draw shaft; finishing undercutting drift stoping by adopting a single-head tunneling mode; performing goaf waste rock filling by brushing and expanding footwall surrounding rock and throwing blasting; removing slag by utilizing a carry-scraper, and erecting an isolation baffle between a brushing and expanding area and a goaf; pressing the mined ore body downwards by adopting a drill jumbo and utilizing the goaf formed by the brushing and expanding area as a free surface, so that the stoping efficiency is improved; and removing the isolation baffle, performing footwall brushing and expanding again, and repeating the steps until the whole sectional stoping operation is finished. The method disclosed by the invention has the advantages of high mechanization degree, simple filling process, low comprehensive cost, high stope production capacity, high safety and the like.

The invention provides a zoning unloading and sublevel filling mining method based on a rhombic stoping structure. A to-be-mined panel is provided with a middle section stope and divided into sublevel stopes, and zoning is carried out along the trend of an ore deposit; in the middle-section stope, the rhombic stoping structures are adopted for stoping from top to bottom in sequence, mining is conducted in a step-by-step and filling-while-mining mode, and the rhombic stoping structures between the subareas are firstly mined. According to the method, the rhombic stoping structures of the lower mining units between the subareas are mined in advance, so that unloading is achieved to relieve damage of horizontal tectonic stress to the lateral wall of the stope; the large-size rhombic stoping structure is large in structural parameter, the bearing capacity is remarkably improved, the problem that the lateral walls of the adjacent stopes of the soft and broken ore deposit are extremely prone to collapse is solved, and the safety production capacity of the stopes is improved. In addition, the rhombic stoping structures are distributed in an up-and-down staggered mode, ore loss can be reduced, and mining efficiency is improved. According to the method, the aim of safely, efficiently and economically exploiting the low-grade soft broken thick and large ore deposit at low cost under the condition of high-level tectonic stress is achieved.