52results about How to "Reduce the amount of quasi-engineering" patented technology

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 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 relates to a two-step upward high-layering bagging cut-and-filling stoping method. A fragmented haulage way is constructed from a slope opening; a stope connection way is drilled from the fragmented haulage way to an ore body footwall; an intra-vein haulage way is constructed in a vein of the ore body footwall for communicating ore chambers with jamb stopes; after the stoping of the ore chamber stopes is finished, a bagging tailing stop wall is built in an outlet position for stope filling; when the stop wall is built, the intra-vein haulage way of the footwall is remained as a stoping channel of the jamb stopes; after the stoping of the jamb stopes is finished, multiple jamb stopes are taken as one district; filling stop walls are built at the two ends of the intra-vein haulage way of the footwall and in an outlet of the stope connection way; and the multiple jamb stopes are filled once through the mobility of filling slurry. The method is low in stope preparation work amount, is low in production cost of the filling stop walls, can realize synchronous filling of the multiple two-step stopes, and reduces the complexity of the filling process.

The invention discloses a novel method for collaboratively exploiting underground double stopes of an underground mine. Each ore block is internally divided into two stopes including a left stope room (9) and a right stope room (10), and a jamb (8) is reserved between every two ore blocks. A drilling chamber (1) is formed in the top end of each ore block, a downward blast hole (2) is formed in each drilling chamber (1) through deep hole rock drilling equipment, a controlled blasting technology is adopted, initiation of explosion is conducted segment by segment to achieve one-time explosion, the working face of the left stope room (9) is ahead of the working face of the right stope room (10), advancing is conducted in a ladder form, and caved ores are transported to a winze through an ore removal linked lane; an ore removal lane (5) is arranged on a single side of each ore block, the left stope room (9) and the right stope room (10) share the same ore removal lane (5), after stoping of a whole ore block is stopped, a goaf is subjected to backfill, a filing body (7) is formed, and the filing body (7) supports the jambs (8). By means of the novel method, double-stope synchronous stoping can be achieved for inclined and large and thick ore bodies which are good in rock-ore stability, and production capacity is high; synchronous ore removal of the two stope rooms can be achieved through only one ore removal lane of an ore removal structure at the bottom, and therefore the stope preparation work amount is reduced.

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.

This invention relates to an underground mining technology, especially to a sectionalized avalanche mining method without bottom pole whose route space is more than the sectionalized height. The bodily technique method as follows: after choosing the sectionalized height, confirming the route space L according the following methods: the route space L is more the sectionalized height H, the route space L =(1.0-1.5).sectionalized height H. This invention is mainly applied in the underground mining, and this technique method can improve the control range of each route greatly, and save the mining quantity, and reduce the ratio of grubbing and plucking, and improve the mining efficiency.

The invention belongs to the field of mining and relates to a sublevel open stoping method ground pressure control method of inclined large and thick ore bodies. Chamber is divided into three sublevels in the vertical direction, and a roof pillar is reserved above; an along-vein roadway, a rock drilling roadway, a cutting level and a cutting raise are arranged at each sublevel; medium-length holeblasting is adopted to form cutting grooves; during stoping of the chamber, sublevel centralized blasting is adopted, centralized blasting is performed on the whole chamber four times in total. The method has the benefits as follows: a mining preparation arrangement manner combining going along with and penetrating through veins outside of footwalls is adopted, and the mining preparation work amount is reduced; the sublevel centralized blasting technology is adopted, the stoping cycle of a stope is shortened, and the exposure time of a vacant stope is shortened; sublevel centralized ore removal is adopted, and the hanging wall pressure, transferred by falling ore, applied to footwall rock is reduced; a triangular ore pile is reserved on a chamber hanging wall, mixing of hanging wall wastestone during stoping is avoided, and the dilution rate is decreased.

The embodiment of the invention discloses an annular arrangement route mining method which is suitable for medium-thick ore bodies and above. The construction steps are as follows: three stope main connecting roadways are constructed in a delineated ore body, a first-step route is constructed to a left stope connecting roadway and a right stope connecting roadway along the position of the stope main connecting roadways parallel to the trend of the ore body, and a second-step route is constructed to the stope main connecting roadways along the boundaries of a left stope and a right stope; the first-step route is provided with a special cemented filling drainage well, the second-step route is provided with a reserved special ventilation well, and a graded tailings filling process is adopted;the route mining sequence, filling, ventilation and other processes of an upper section and a lower section are exchanged, the workload of stope preparation is reduced until stope coal extraction isfinished, alternate roof-contact filling upward mining of the first-step route and the second-step route of the stope is carried out, and the undercutting work quantity is reduced; and graded tailingsfilling and cemented filling are constructed alternately, and the advantages that the filling cost is reduced, the labor efficiency is high, the stope preparation work amount is relatively small, thestrength of a filling body is high, and the ventilation effect is good are achieved.

The invention provides a downward high-layer cemented filling mining method. The method comprises the steps of stope arrangement, accurate mining cutting, stoping and filling. In the stoping process,layers of the preset number are divided into stoping subareas in a downward drift and upward layer stoping synergistic effect manner, and stoping is conducted on ore bodies of subarea lower layers ineach stoping subarea through a drift method; and then ore bodies of subarea upper layers are stoped in a retreating manner in an upward picking mining manner. By means of the manner, the overall stoping strength and the mechanization degree can be effectively improved, so that the ore removal efficiency is greatly improved, and the overall production capacity of a stope is improved. Meanwhile, based on the division of the stoping subareas in the method, a plurality of layer connecting roadways required by a plurality of layers originally can be reduced to one, so that the mining preparation work amount is greatly reduced, the mining efficiency is further improved, the ton ore stoping cost is reduced, and the method has the characteristics of simple process, high safety, high production capacity, low ton ore cost and the like.

The invention discloses a method for mining an inclined and steeply inclined thin ore body, which comprises the following steps of: dividing ore blocks along the trend of the ore body, and upwards digging an outside-vein pedestrian ventilation raise, a connection gateway and an ore removal roadway on a footwall of the ore body; the stoping sequence of advancing from one side of a stope to the other side and from bottom to top is adopted, blast hole drilling and one-time multi-hole multi-row blasting are conducted, point columns are reserved in the stoping process, wall-knocking and top-digging work is strengthened, and anchor rods are adopted for anchoring when necessary; firstly, one third of the ore is transported out by a forklift through an ore removal roadway, the reserved point columns and the caved ore support the hanging wall surrounding rock of the stope together, and after stoping is conducted to the top column position, a large amount of ore drawing is conducted; and blocking a transverse drift roadway, an ore removal roadway and the like of the stope by using grouted rubble. Through theoretical calculation and field practice, mining of the inclined thin ore body is achieved under the conditions that a filling technology is not newly built and the whole mining technology is not changed, and high operability is achieved.

The invention discloses a hanging wall crushing gentle-inclined thick and large ore body filling mining method. The method comprises the steps that 1) a hanging wall area and a mining area are divided in the ore body walking direction, and a stud is arranged; 2) stages and sections are divided, and ore blocks are arranged in the sections in a strip mode; 3) a stope preparation slope ramp is arranged on a lower wall to communicate all the sections, and ore removal connecting channels are arranged in a cross drift in a staggered mode to communicate with ore receiving roadways of all the ore blocks; 4) roof control is conducted on hanging wall crushing surrounding rock in advance, and a stable roof environment is reconstructed; 5) parallel medium-length hole caving is conducted downwards through roof control roadways; 6) retreating type stoping is conducted from the two wings to the middle in the hanging wall area, and ore blocks are transferred to an ore removal draw shaft through trackless equipment; 7) filling operation is conducted after stoping is finished; 8) all the sections are stoped step by step, and ore body mining is completed; and 9) the stud is recovered in the cross drift in a retreating mode. According to the method, the stable roof environment is reconstructed, and the operation condition is safe; good through air flow can be formed, and the operation environment is good; and medium-length hole caving is adopted, the ore removal route is simple and fixed, large-scale operation of the trackless equipment is facilitated, and the production efficiency is high.

The invention discloses a stope structure arrangement method applicable to gently inclined medium and thick ore body combination sectioned mining. Lower sectional stopes (2) and upper sectional stopes(3) are alternately arranged in the vertical direction of an ore body every 10-15 m, each lower sectional stopes (2) and upper sectional stopes (3) are combined into a mining unit (1); studdings (4)are formed at the ends of the mining unit (1); cutting troughs are formed in the stopes with slot raises (10) as a free surface; ore falls into ditches (9); and ore is loaded in an ore loading approach road (8) through a carry-scraper, carried to an ore draw shaft (11) through an ore removal roadway (7), and then dropped to a haulage roadway (12) to be loaded and conveyed out. Every two sectionalstopes are divided into a mining unit for mining, projects such as the ore removal roadway, the ore draw shaft and a slope road linking taxiway are shared, the accurate mining cost is reduced, the preparation time for accurate mining work is saved, the mining efficiency is improved, mined waste rock can be processed into building materials for sale, and new storage space for tailings filling is additionally formed.

Relating to the technical field of mineral exploration, the invention provides a copper ore mining process. The process includes the steps of: (1) mining area setting, (2) prospecting, (3) mining, (4)stoping, and (5) desliming. The mining process provided by the invention has high control degree on the ore body, can effectively improve the copper ore recovery during mining and reduce the loss rate and dilution rate of copper ore, improves the utilization rate of mineral resources, provides resource guarantee for sustainable development of mines, and has good use value and application prospects.

The invention discloses a novel 90-m high-middle-section fan-shaped deep hole stoping method, and relates to the technical field of mining processes. The novel 90-m high-middle-section fan-shaped deep hole stoping method comprises the following steps: S1, rock drilling level stoping preparation is designed, a panel is divided into two chambers in the ore body trend, the two chambers are the first chamber and the second chamber respectively, and a rock drilling chamber is constructed in each chamber in the rock drilling level in the ore body trend. According to the novel 90-m high-middle-section fan-shaped deep hole stoping method, the stoping preparation work amount of the chambers is small, the mining cutting ratio is low, and the stoping preparation cost is low; the dilution rate of the chambers is low; the blasting lumpiness is uniform, the lumpiness rate is low, and the secondary crushing cost is low; the perforation amount is small, the perforation cost is low, damage of blasting to chamber sides is small, and the stability of the chambers is good; and meanwhile, compared with an original VCR mining process, one rock drilling chamber can be omitted for each chamber, about 50% of stoping preparation work amount can be saved, the perforation cost is reduced by about 3 yuan/t, and the direct cost of blasting, ore removal and secondary crushing is reduced by 2.5 yuan/t by adopting a fan-shaped deep hole stoping process.

The invention relates to a downward layered up-down staggered drift filling mining method. The downward layered up-down staggered drift filling mining method is realized through stope arrangement, mining preparation cutting, stoping, stope ventilation and stope filling, and comprises the following steps that firstly, a preparation layer is formed at the top of an ore body, a first layered drift is started to be stoped after the preparation layer drift is completely filled, a second layered drift is stoped after the first layered drift is completely filled, and after the second-layer drift is mined, a downward layered up-down staggered drift stope structure is formed; the next-layer drift and the previous-layer drift are staggered up and down by 3 m and are stoped at intervals, the distance is 5 m, the top of the drift is a filling body false top, the upper half parts of the two sides are filling bodies, the lower half parts are ore bodies, and the safety is high; the two sides of the access are not prone to caving, and stoping is safe and reliable; the access section is large, and the production capacity is high; the inlet road is stoped along the top plate of the upper layer, the stoping direction is easy to control, and the engineering quality is high; the stope production organization is simple; the stope is simple in structure, the accurate mining project is simple, and the accurate mining project amount is small; large trackless equipment can be used in the stope, so that the production efficiency of the stope is greatly improved; and the stope filling engineering system is simple.

The invention discloses a method for safely and efficiently recovering panel pillars by using a sublevel open-stope subsequent filling method, A sublevel rock drilling roadway (5), a sublevel contact way (6), a stope slope ramp (7) and a sublevel vein-following contact way (8) of an original project are fully utilized, filling raises are arranged at intervals in the length direction of the panel pillars (3) according to design parameters in the upper section of the middle section of stoping, the filling raises are used for backfilling waste rocks to form a filling waste rock covering layer (9) according to the mining principle of a sill-pillar-free sublevel caving method, ore removal is completed under the covering layer, it is ensured that ore rocks in a stope are full, and retaining wall pillars (10) on the two sides are supported, so that the stoping safety is ensured. The method is high in ore recovery rate, high in recovery capacity, low in recovery cost, high in mechanization degree, safe in operation environment, free of goaf after recovery and free of hidden danger.