Drift road type mechanical mining method based on mining three-way air door

Abstract

The invention relates to the technical field of mining production, in particular to an access road type mechanical mining method based on a mining three-way air door, and aims to solve the problems that in the non-coal mine access road mechanical mining process at present, due to the fact that the ventilation capacity of the air door is limited, and access roads are short and large in number, the overall dispatching efficiency of mining is finally greatly influenced. According to the method, one three-way air door is connected with an exhaust fan, the other air doors are connected to a mining access road, air blocking door moving and ventilation air path switching are utilized, access road alternate ventilation and dust removal are achieved, the access road length can be prolonged, a mining production system is simplified, meanwhile, under the control of a driving screw, moving of the air blocking door is achieved, and during long-access-road mining, the service life of the air blocking door is prolonged. An inclined connection way is arranged between the adjacent long access roads, so that the exit distance during equipment transition is shortened, and sufficient transition parking space is provided for matched equipment; during filling operation, the air bag is arranged in the inclined connection way, and the phenomenon that filling materials enter the connection way and affect the mining efficiency is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of mining production, and particularly relates to a drift mechanical mining method based on a three-way air door for mines. Background Art

[0002] At present, when non-coal mines adopt the drift method to mine ore bodies, cross-cut headings and along-strike headings need to be set in the ore body, and drift headings are set perpendicular to the cross-cut headings and along-strike headings. Mining is completed in the drifts. Limited by the large number of drifts, it is not conducive to setting up a through ventilation circuit. Therefore, diffusion ventilation is usually adopted in the drifts, that is, the ventilation method of cleaning the working face by the turbulent diffusion action of fresh air flow. Diffusion ventilation is only suitable for short-distance single-heading working faces, which is not conducive to increasing the length of the drift, restricting the length of the mining drift. For drift mechanical mining, mechanical mining equipment such as roadheaders needs to withdraw from the drift during the construction of safety guarantee processes such as bolt-shotcrete support and prying loose operations, and transfer to other drifts for mining. As the length of the drift increases, the machine withdrawal and transfer time increases, reducing the effective working time of the mining equipment. Therefore, the main limitations of the current non-coal mine drift mining method are as follows: limited by the ventilation capacity, the drift length is short. When the number of drifts is large, the mining scheduling and management are difficult. Moreover, as the length of the drift increases, the machine withdrawal and transfer time of the mining equipment increases, and the waiting time for supporting processes such as bolt-shotcrete support and prying loose operations is prolonged, which has a greater impact on the overall efficiency of mining production. Summary of the Invention

[0003] The present invention provides a drift mechanical mining method based on a three-way air door for mines to solve the problems existing in the above background.

[0004] To achieve the above object, the present invention adopts the following technical solutions: A three-way air door for non-coal mine mining includes a three-way body. One side of the three-way body is provided with a short-side air outlet, the other side of the three-way body is provided with a plurality of long-side air outlets, and a wind blocking door is slidably arranged on the three-way body between the short-side air outlet and the long-side air outlets in a matching manner.

[0005] Further, a sliding groove is formed on the three-way body, a screw rod is rotatably arranged in the sliding groove, the bottom of the wind blocking door is fixedly provided with a plurality of nut slider bases, and the nut slider bases are all sleeved and connected with the screw rod.

[0006] Further, a rotating handle is arranged on one side of the screw rod extending out of the three-way body, and the rotating handle and the screw rod are connected through a driven wheel.

[0007] The present invention also includes a drift mechanical mining method based on a three-way air door for mines, which includes the following steps: Step 1: First, drive a crosscut roadway from the out-of-orebody sectional roadway towards the orebody. The crosscut roadway should pass through the pre-retained filling return airway in the upper level, and drive a long drift obliquely towards the orebody from the crosscut roadway at an obtuse angle.

[0008] Step 2: Then, arrange multiple inclined connecting roadways at intervals on the ore pillar between two adjacent alternately mined long drifts.

[0009] Step 3: Next, install an exhaust fan at the filling return airway of the crosscut roadway, connect the short-side air outlet of the three-way air door with a rigid air duct, and at the same time connect the long-side air outlets with rigid air ducts respectively to the working faces of two adjacent alternately mined long drifts. And install an air door between the three-way air door and the exhaust fan in the crosscut roadway.

[0010] Step 4: After that, when the roadheader is mining in the long drift, the fresh air flow reaches the mining working face after passing through the sectional roadway, crosscut roadway and long drift. The polluted air is discharged from the filling return airway after passing through the air duct, three-way air door and exhaust fan.

[0011] Step 5: Then, use the three-way air door to control the long-side air outlet connected to the short-side air outlet according to the position of the long drift where the mining equipment is located, so as to meet the alternate ventilation and dust removal of multiple working faces.

[0012] Step 6: After that, after two adjacent alternately mined long drifts are mined, recover the air ducts in the drifts and transfer them to the new adjacent long drifts. And install air bags in the inclined connecting roadways in the ore pillars between the mined long drifts to prevent the filling materials from entering the inclined connecting roadways during filling. Then, install a filling retaining wall at the opening end of the mined long drift to complete the filling operation.

[0013] The present invention has the following beneficial effects: In the drift-type mechanical mining method based on a mine-used three-way air door provided by the present invention, one three-way air door is connected to the exhaust fan, and the other air doors are respectively connected to the mining drifts. By moving the air doors, the ventilation air paths are switched to realize alternate ventilation and dust removal in the drifts, which is beneficial to extending the drift length and simplifying the mining production system. At the same time, under the control of the driving screw, the air doors can move. And when mining in the long drift, inclined connecting roadways are arranged between adjacent long drifts, which shortens the retraction distance of the equipment during the equipment transfer and provides sufficient transfer and parking space for the supporting equipment. During the filling operation, air bags are installed in the inclined connecting roadways, effectively preventing the filling materials from entering the connecting roadways and affecting the mining efficiency, and solving the problem that in the process of drift mechanical mining in non-coal mines at present, due to the limited ventilation capacity of the air doors, and the short drift length and large number of drifts, the overall scheduling efficiency of mining is ultimately greatly affected.

[0014] The present invention utilizes a three-way air door to achieve alternative ventilation between multiple long access roads, effectively improving the ventilation and dust removal effect, extending the length of the access roads, reducing the number of access roads. At the same time, by using the combined application of cross-cut headings, access road headings, and inclined connecting roadways, the mine roadway system is greatly simplified, the equipment transfer time is shortened, and the mining efficiency is improved. Brief Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the structure of the air door of the present invention.

[0017] Figure 3 It is a schematic diagram of the mining method of the present invention.

[0018] The meanings of the reference numerals are as follows: 1, three-way body; 2, air door; 3, air door moving mechanism; 101, short-side air outlet; 102, long-side air outlet; 103, sliding groove; 201, air door body; 202, nut slider base; 301, screw rod; 302, rotating handle; 303, driven wheel; 401, sectional roadway; 402, cross-cut heading; 403, long access road; 404, inclined connecting roadway; 405, filling return air shaft; 406, ore chute; 407, ore pillar; 501, three-way air door; 502, exhaust fan; 503, air duct; 504, air door; 601, filling retaining wall; 602, airbag. Detailed Description of the Preferred Embodiments

[0019] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0020] As Figure 1-2 shown, a three-way air door for non-coal mine mining includes a three-way body 1. A short-side air outlet 101 is provided on one side of the three-way body 1, and a plurality of long-side air outlets 102 are provided on the other side of the three-way body 1. A sliding air door 2 is slidably arranged on the three-way body 1 between the short-side air outlet 101 and the long-side air outlets 102.

[0021] A sliding groove 103 is formed on the three-way body 1, and a screw rod 301 is rotatably arranged in the sliding groove 103. A plurality of nut slider bases 202 are fixedly arranged at the bottom of the air door 2, and the nut slider bases 202 are sleeved and connected with the screw rod 301.

[0022] A rotating handle 302 is provided on one side of the screw rod 301 extending out of the three-way body 1, and the rotating handle 302 is connected with the screw rod 301 through a driven wheel 303.

[0023] The tee body 1 of the mine three-way air door is a trapezoidal hollow structure. One circular through-hole is provided at one end of the short side to form a short-side air outlet 101, and two circular through-holes are provided at one end of the long side to form two long-side air outlets 102. At the same time, sliding grooves 103 are provided at the top and bottom inside the tee body 1 near the long-side air outlets 102. A wind door 2 is arranged in the sliding grooves 103. The size of the wind door body 201 can completely block one long-side air outlet 102. A nut slider base 202 is arranged at the lower end of the wind door body 201. The width of the nut slider base 202 is the same as that of the sliding groove 103 at the bottom of the tee body 1, and the width of the wind door body 201 is the same as that of the sliding groove 103 at the top of the tee body 1. The moving screw 301 of the wind door moving mechanism 3 passes through the nut slider base 202 of the wind door 2, and the two are connected by threads, so that when the moving screw 301 rotates, the wind door 2 moves in the sliding groove 103. A rotating handle 302 and a driven wheel 303 are arranged outside the tee body 1 on the moving screw 301 to respectively achieve the purpose of manually moving the wind door 2 and externally powered driving the driven wheel 303 to move the wind door 2. An entry-type mechanical mining method based on a mine three-way air door includes the following steps: Step 1: First, drive a cross-cut roadway 402 from the out-of-orebody sectional roadway 401 to the orebody. The cross-cut roadway 402 should pass through the filling return air shaft 405 reserved in the upper layer, and drive a long entry 403 obliquely from the cross-cut roadway 402 to the orebody at an obtuse angle.

[0024] Step 2: Then, a plurality of inclined connecting roadways 404 are arranged at intervals on the ore pillar 407 between two adjacent alternately mined long entries 403.

[0025] Step 3: Then, an exhaust fan 502 is arranged at the filling return air shaft 405 of the cross-cut roadway 402. A rigid air duct 503 is used to connect the short-side air outlet 101 of the three-way air door 501, and at the same time, the rigid air duct 503 is respectively connected to the long-side air outlets 102 to the working faces of two adjacent alternately mined long entries 403, and an air door 504 is arranged between the three-way air door 501 and the exhaust fan 502 in the cross-cut roadway 402.

[0026] Step 4: After that, when the roadheader mines in one long entry 403, the fresh air flow reaches the mining working face after passing through the sectional roadway 401, the cross-cut roadway 401 and the long entry 403. The polluted air is discharged from the filling return air shaft 405 after passing through the air duct 503, the three-way air door 501 and the exhaust fan 502.

[0027] Step 5: Then, use the three-way air door 501 to control the long-side air outlet 102 communicating with the short-side air outlet 101 according to the position of the long entry 403 where the mining equipment is located, so as to meet the alternate ventilation and dust removal of multiple working faces.

[0028] Step 6. After the long drifts 403 for alternate mining are mined out adjacent to each other, the air ducts 503 in the drifts are recovered, transferred to the new adjacent long drifts 403, and air bags 602 are arranged in the inclined connecting drifts 404 in the ore pillars 407 between the mined-out long drifts 403 to prevent the filling material from entering the inclined connecting drifts 404 during filling. Then, a filling retaining wall 601 is arranged at the opening ends of the mined-out long drifts 403 to complete the filling operation.

Claims

1. A three-way air door for non-coal mine mining, comprising a three-way body (1), characterized in that: One side of the tee body (1) is provided with a short-side air outlet (101), the other side of the tee body (1) is provided with a plurality of long-side air outlets (102), and a wind baffle door (2) is slidably arranged on the tee body (1) between the short-side air outlet (101) and the long-side air outlets (102) in a matching manner.

2. The three-way air door for non-coal mine mining according to claim 1, characterized in that: A sliding groove (103) is formed on the tee body (1), a screw rod (301) is rotatably arranged in the sliding groove (103), a plurality of nut slider bases (202) are fixedly arranged at the bottom of the wind baffle door (2), and the nut slider bases (202) are sleeved and connected with the screw rod (301).

3. The three-way air door for non-coal mine mining according to claim 2, characterized in that: A rotating handle (302) is arranged on one side of the screw rod (301) extending out of the tee body (1), and the rotating handle (302) is connected with the screw rod (301) through a driven wheel (303).

4. It also includes a drift mechanical mining method based on a three-way mine air door, characterized in that It includes the following steps: Step 1: First, drive a cross-cut roadway () 402 from the out-of-orebody sectional roadway (401) into the orebody. The cross-cut roadway 402 should pass through the filling return air shaft 405 reserved in the upper layer, and drive a long heading 403 obliquely into the orebody from the cross-cut roadway 402 at an obtuse angle. Step 2: Then, a plurality of inclined connecting roadways 404 are arranged at intervals on the ore pillar 407 between two adjacent alternately mined long headings 403. Step 3: Then, an exhaust fan 502 is arranged at the filling return air shaft 405 of the cross-cut roadway 402. A hard air duct 503 is used to connect the short-side air outlet 101 of the three-way air door 501, and at the same time, the hard air duct 503 is respectively connected to the long-side air outlets 102 to the working faces of two adjacent alternately mined long headings 403. And an air door 504 is arranged between the three-way air door 501 and the exhaust fan 502 in the cross-cut roadway 402. Step 4: After that, when the roadheader mines in one long heading 403, the fresh air flow reaches the mining working face after passing through the sectional roadway 401, the cross-cut roadway 401 and the long heading 403. The polluted air is discharged from the filling return air shaft 405 after passing through the air duct 503, the three-way air door 501 and the exhaust fan 502. Step 5: Then, use the three-way air door 501 to control the long-side air outlet 102 communicated with the short-side air outlet 101 according to the position of the long heading 403 where the mining equipment is located, so as to meet the alternate ventilation and dust removal of multiple working faces. Step 6: After that, after two adjacent alternately mined long headings 403 are mined, the air duct 503 in the heading is recovered and transferred to the new adjacent long heading 403. An airbag 602 is arranged in the inclined connecting roadway 404 in the ore pillar 407 between the mined long headings 403 to prevent the filling material from entering the inclined connecting roadway 404 during filling. Then, a filling retaining wall 601 is arranged at the opening end of the mined long heading 403 to complete the filling operation.

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