Cantilevered tunneling machine cutting and subsequent filling method for mining phosphate rock

Abstract

The present application belongs to the field of phosphate ore filling mining, and particularly relates to a kind of cantilever type heading machine cutting subsequent filling phosphate ore mining method, comprising: along the strike interval heading pseudo-inclined uplink connecting middle section transport roadway and middle section air return roadway;In the ore block, a plurality of pseudo-inclined ore rooms are arranged in sequence;From the pseudo-inclined uplink on the right side of the ore room or from the auxiliary transport roadway below it, drill into the ventilation ore hole along the length direction of the ore room and stick to the floor at the lower part of the ore room;A transfer chamber and a chute are arranged at the bottom of the next ore block;From top to bottom, the cantilever type heading machine is used to mine the ore room in the mode of every other one and subsequent filling, and the lower access is mined first during mining, and then the upper access is mined;When ventilating each ore room, the ventilation direction is the same as the heading direction.The present application has small disturbance to surrounding rock, good roadway shaping, small ore block size, and good ventilation effect.The present application can simultaneously mine multiple ore blocks, ensure ventilation quality, control dust effect, and improve mining efficiency.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of phosphate ore filling mining, and particularly relates to a kind of cantilever type heading machine cutting subsequent filling phosphate ore mining method. BACKGROUND

[0002] The three-mining area of Wengfu (Group) Milling Phosphate Mine is located in the south wing of the mining area, and the ore body above the 1020m elevation of the south section of No. 3 ore body is mined. The mining sequence from bottom to top is designed along the inclination, and the mining sequence of each section is: 1020m, 1050m, 1080m, 1110m, and 1140m section, with a section height of 30m. The roof rock of the ore body in the three-mining area is dolomite, and the floor rock is siliceous rock. The inclination of the ore body in the three-mining area is 13-20°, with an average inclination of 16°, the thickness of the ore body is 1.18-10.79m, and the average thickness is 4.80m, which is thin to medium-thick ore body, and can be mined at one time without layering.

[0003] In the early stage, a mining scheme for the three-mining area was designed in cooperation with a company, which can refer to the patent "Non-layered mining machine cutting mining construction method" (application number 202211223142.5). This method effectively improves the filling quality of the filling material. This method uses a cantilever type heading machine to excavate and drop ore, which reduces the disturbance to the stratum and reduces the risk of roof collapse. However, the ore dust generated by the heading machine is large, the working environment of the workers is poor, and the forward line of sight is easily affected by the ore dust when operating the heading machine, which leads to inaccurate cutting of the ore body according to the designed excavation route. In this working environment, safety accidents are prone to occur, so it is necessary to optimize the technical scheme to reduce the ore dust in the construction environment and improve the safety of the construction. SUMMARY

[0004] To solve the above technical problems, the application provides a kind of cantilever type heading machine cutting subsequent filling phosphate ore mining method, including the following steps:

[0005] S1: along the strike, excavate the middle section transportation roadway in the lower part, and excavate the middle section return airway in the upper part; excavate the pseudo-inclined up-slope to connect the middle section transportation roadway and the middle section return airway at intervals along the strike, form a ore block between two adjacent pseudo-inclined up-slopes, and number them in sequence;

[0006] S2: for each ore block, arrange a plurality of pseudo-inclined ore rooms in sequence, and the pseudo-inclined direction of the pseudo-inclined ore room is opposite to that of the pseudo-inclined up-slope;

[0007] S3: excavate an auxiliary transportation roadway from the right side of the first ore block along the strike to the left, and excavate the auxiliary transportation roadway to the boundary of the leftmost ore room, and leave a transportation roadway protection pillar between the auxiliary transportation roadway and the middle section transportation roadway 3;

[0008] For each room, a ventilation ore hole is drilled along the length of the room and at the lower part of the room from the false inclined ramp on the right side of the room or from the auxiliary haulage roadway below the room;

[0009] S4: For the second ore block, after the ore body in the lowermost room is mined, the room serves as a transfer chamber, and a haulage roadway protection pillar is left between the transfer chamber and the main haulage roadway; a chute is constructed in the haulage roadway protection pillar to connect the transfer chamber and the main haulage roadway;

[0010] S5: The rooms are mined from top to bottom in a one-in-two manner, and each room is mined in two entries, both of which are constructed along the length of the room. The lower entry is first mined using a boom-type roadheader, and the mined ore is transported to the false inclined ramp on the right side of the room through the ventilation ore hole, and then to the transfer chamber, where it is stored;

[0011] The upper entry is then mined from left to right using a boom-type roadheader, and the mined ore is transported to the false inclined ramp on the right side of the room through the lower entry of the room, and then to the transfer chamber, where it is stored;

[0012] The ore stored in the transfer chamber is put into the ore layer in the main haulage roadway through the chute and directly transported out;

[0013] S6: The mined rooms are filled;

[0014] S7: The second ore block is mined in the same way as the first ore block, and so on until all the ore blocks are mined.

[0015] Preferably, a middle section bottom pillar is left between the main haulage roadway and the lower middle section filling body, and a middle section top pillar is left between the main return air roadway and the upper middle section ore body.

[0016] Preferably, the angle between the false inclined ramp and the strike is 30°, and the angle between the false inclined room and the strike is 120°.

[0017] Preferably, the distance between adjacent false inclined ramps is 100-125 m, and the width of the false inclined room is 10 m.

[0018] Preferably, in step S3, ventilation ore holes are drilled in the rooms from top to bottom, and the drilled ore is directly transported to the main haulage roadway from the false inclined ramp or through the auxiliary haulage roadway.

[0019] Preferably, in step S3, the air intake route is designed to reach the false inclined ramp on the right side of the first ore block from left to right through the main haulage roadway, and then the air flow is discharged to the right through the main return air roadway.

[0020] Preferably, in step S3, a fan is arranged at the intersection of the auxiliary transportation roadway and the right side pseudo-inclined raise to blow air.

[0021] Preferably, in step S5, the route of the air intake is designed to pass through the middle section transportation roadway from left to right to the pseudo-inclined raise on the left side of the first ore block, pass through the ventilation and ore outlet hole or the lower mined access to the pseudo-inclined raise on the right side of the first ore block, and then the air flow passes through the middle section return air roadway to the right for exhaust.

[0022] Preferably, in step S6, filling retaining walls are constructed on both sides of the length direction of the mined ore room, and then filling materials are poured into the filling retaining walls to form filling bodies.

[0023] Preferably, in step S6, the filling pipeline passes through the pseudo-inclined raise on the left side of the first ore block from the middle section transportation roadway or the middle section return air roadway to the ore room that needs to be filled.

[0024] Preferably, in step S6, the transfer chamber in the second ore block is filled.

[0025] Preferably, the third ore block is mined simultaneously with the first ore block according to the mining scheme of the first ore block, and the fourth ore block is mined simultaneously with the second ore block according to the mining scheme of the second ore block; and the above process is repeated until all the ore blocks are mined.

[0026] The beneficial technical effects of the present application are as follows: 1. Small disturbance to surrounding rock: the boom-type roadheader cutting and subsequent filling mining method replaces the traditional rock drilling and blasting in the mining process and cutting process, avoids the strong disturbance of traditional blasting to surrounding rock and surface buildings, and improves the safety of the mining working face. Good roadway forming: under high-speed operation of the roadheader head, the rock is broken by machinery, the ore block is good, the damage to the roof and floor rock is small, and large-area roof collapse does not occur after the roadway is cut, the roadway forming effect is good, the support cost of the bare roadway is saved to a certain extent, and the mining efficiency is improved. Small ore block: most of the ore blocks cut by the roadheader are small-diameter ore blocks, and the ore block integrity is good, thereby avoiding the ore block crushing process and facilitating transportation.

[0027] 2. Good ventilation effect: the technical scheme of the ventilation hole is introduced by improving the prior art, and the ventilation hole is used as both a ventilation hole and an ore outlet hole, so that the mine dust generated by the roadheader cutting is discharged from the ventilation and ore outlet hole, the mine dust of the heading working face is reduced, the visibility is improved, the safety is improved, and the working environment of workers is improved. When the upper drift is mined, the lower drift that has been mined is used as both a ventilation roadway and an ore roadway, which can also reduce the mine dust of the heading working face, improve the visibility, improve the safety, and improve the working environment of workers.

[0028] In order to coordinate with the construction of ventilation outlets, the ventilation outlets are used for ore discharge when the lower access road is used for ore discharge, and the lower access road is used for ore discharge when the upper access road is used for ore discharge, this invention also designs an optimized ventilation line and ore transportation route to minimize the impact of mine dust on workers.

[0029] 3. The mining method of the present invention can mine multiple ore blocks simultaneously, while ensuring ventilation quality and dust control, thereby improving mine production capacity and mining efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the dip profile during the mining of ore layer a using the open-field subsequent filling mining method of the present invention.

[0031] Figure 2 This is a schematic diagram of the dip profile during the mining of ore layer b using the open-field subsequent filling mining method of this invention.

[0032] In the diagram, 1. Lower-middle section filling body, 2. Middle section bottom pillar (lower-middle section top pillar), 3. Middle section transport roadway, 4. Transport roadway protection pillar, 51. First ore block, 52. Second ore block, 53. Third ore block, 54. Fourth ore block, 6. Middle section return airway, 7. Middle section top pillar (upper-middle section bottom pillar), 8. Upper-middle section ore body, 9. Ore block that has been mined and filled, 10. Stope, 11. Auxiliary transport roadway, 12. Ventilation outlet, 13. Transfer chamber, 14. Ore pass, 15. Pseudo-inclined incline within the vein, 16. Pillar, 17. Filling body, 18. Tunneling machine, 19. Filling retaining wall. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1-2 The technical solution of this invention is further explained based on the 1050m section of the third mining area of ​​the Wengfu (Group) Mofang Phosphate Mine. The ore body in the 1050m section has an average thickness of 4.85m and an average dip angle of 15.7°. The lower 1020m section has been mined using backfilling mining technology, which is the location of the backfill body 1 in the lower middle section of the figure. The upper 1080m section has not yet been mined, which is the location of the ore body 8 in the upper middle section of the figure.

[0034] Example 1

[0035] Taking the 1050m section as an example, the cantilever tunneling machine cutting and subsequent backfilling method for phosphate mining of the present invention includes the following steps:

[0036] S1: As Figure 1 As shown, the middle section transport roadway 3 is excavated along the strike. A middle section bottom pillar 2 is left between the middle section transport roadway 3 and the lower middle section filling body 1. The middle section bottom pillar 2 is also the top pillar of the lower middle section.

[0037] In this middle section, the middle section return airway 6 is excavated along the strike at the top of the middle section. The middle section top pillar 7 is left between the middle section return airway 6 and the upper middle section ore body 8. This middle section top pillar 7 will later serve as the bottom pillar of the upper middle section.

[0038] A pseudo-inclined upraise 15 is excavated every 125m along the strike to connect the middle section haulage roadway 3 and the middle section return airway 6, and the included angle between the pseudo-inclined upraise 15 and the vein strike is about 30°; a mining block is formed between two adjacent pseudo-inclined upraises 15, and the unmined blocks from left to right in the figure are defined as a first mining block 51, a second mining block 52, a third mining block 53, a fourth mining block 54, and an n-th mining block;

[0039] S2: As shown in Figure 1 , for each mining block, a plurality of pseudo-inclined stopes 10 are arranged in sequence, the included angle between the pseudo-inclined stope 10 and the vein strike is about 120°, and the pseudo-inclined direction of the pseudo-inclined stope 10 is opposite to that of the pseudo-inclined upraise 15; the width of the pseudo-inclined stope 10 is 10m;

[0040] S3: As shown in Figure 1 , for one of the mining blocks, such as the first mining block 51, an auxiliary haulage roadway 11 is excavated from the right side of the pseudo-inclined upraise 15 along the strike to the left, the auxiliary haulage roadway 11 is excavated to the boundary of the leftmost stope 10, the auxiliary haulage roadway 11 is parallel to the middle section haulage roadway 3, and a 4m-wide haulage roadway protection pillar 4 is left between them;

[0041] For each stope 10, a ventilation and ore drawing hole 12 is drilled along the length direction of the stope 10 and close to the floor and in the lower part of the stope 10 from the right side of the pseudo-inclined upraise 15 or from the auxiliary haulage roadway 11 below; preferably, the ventilation and ore drawing holes 12 are drilled in the stope 10 from top to bottom in sequence; the drilled ore is directly transported to the middle section haulage roadway 3 from the pseudo-inclined upraise 15 or from the auxiliary haulage roadway 11, and then transported out from the middle section haulage roadway 3;

[0042] The route of the incoming air is designed to pass through the middle section haulage roadway 3 from left to right to the right side of the pseudo-inclined upraise 15 of the first mining block 51 to provide fresh air for the miners who construct the ventilation and ore drawing hole 12 in the right side of the pseudo-inclined upraise 15 of the first mining block 51, and then the air flow is discharged to the right through the middle section return airway 6; the ventilation of the auxiliary haulage roadway 11 can be performed by setting a fan at the intersection of the auxiliary haulage roadway 11 and the right side of the pseudo-inclined upraise 15 (at this time, a wind curtain can be set near the middle section haulage roadway 3 on the left side of the pseudo-inclined upraise 15 of the first mining block 51, and a wind curtain can be set on the middle section return airway 6 on the upper side of the first mining block 51, and the constructed ventilation and ore drawing holes 12 are temporarily blocked; since the setting of the wind curtain guides the air flow direction, it is a conventional technology in the field, and will not be described here);

[0043] S4: As shown in Figure 1As shown, for the second block 52, after the ore body in its lowest stope 10 is mined out, it is used as a transfer chamber 13. A transport roadway protection pillar 4 is left between the transfer chamber 13 and the middle transport roadway 3. A chute 14 is constructed in the transport roadway protection pillar 4 to connect the transfer chamber 13 and the middle transport roadway 3.

[0044] S5: As Figure 2 As shown, the mine 10 is mined from top to bottom using a one-by-one mining method. For each mine, two access routes are used for mining. Both access routes are constructed along the length of the mine 10. First, the lower access route, i.e. the access route where the ventilation outlet 12 is located, is mined. A cantilever tunneling machine 18 is used to mine from left to right. The mined ore passes through the ventilation outlet 12 and then to the pseudo-inclined uphill 15 on the right side. It then reaches the transfer chamber 13 and is stored in the transfer chamber 13. The air intake route is designed to go from left to right through the middle transport roadway 3 to the pseudo-inclined uphill 15 on the left side of the first block 51. After passing through the ventilation outlet 12, it reaches the pseudo-inclined uphill 15 on the right side of the first block 51, providing fresh air for the miners who are tunneling, dropping, and transporting ore in the mine 10. After that, the airflow is discharged to the right through the middle return airway 6.

[0045] Then, the upper access road is mined using a cantilever tunneling machine 18 from left to right. The mined ore passes through the already mined access road in the lower part of the stope to the pseudo-inclined uphill 15 on the right side, and then reaches the transfer chamber 13, where it is stored. The air intake route is designed to go from left to right through the middle transport roadway 3 to the pseudo-inclined uphill 15 on the left side of the first block 51, and then through the already mined access road in the lower part of the stope to the pseudo-inclined uphill 15 on the right side of the first block 51, providing fresh air for miners who are tunneling, dropping and transporting ore in the stope 10. After that, the airflow is discharged to the right through the middle return airway 6.

[0046] At this time, an air curtain can be set up at the location of the pseudo-inclined uphill 15 on the left side of the first block 51, near the middle section return airway 6, and an air curtain can be set up at the location of the pseudo-inclined uphill 15 on the right side of the first block 51, near the middle section transport airway 3.

[0047] The ore stored in the transfer chamber 13 is transported directly out through the ore layer in the intermediate transport roadway 3 via the chute 14, meaning that the mine car only needs to work in the intermediate transport roadway 3.

[0048] S6: As Figure 2 As shown, after mining the stope 10 in an alternating manner, a pillar 16 is formed between adjacent mined stops 10; for the mined stope 10, filling retaining walls 19 are constructed on both sides of its length direction, and then filling material is injected into it to form a filling body 17; the filling pipeline runs from the middle section transport roadway 3 or the middle section return air roadway 6 through the pseudo-inclined uphill 15 on the left side of the first block 51 to the stope 10 that needs to be filled;

[0049] The air intake route is designed to reach the pseudo-inclined uphill 15 on the left side of the first block 51 from the middle section transport roadway 3, and then pass through the filling room 10 to provide fresh air for the miners who are carrying out filling work in the room 10; after that, the air flow is led out by a fan to the middle section return airway 6.

[0050] Fill the transfer chamber 13 in the second block 52;

[0051] S7: Mine the second block 52 using the same mining method as the first block 51, and so on, until all blocks are mined.

[0052] Example 2

[0053] Building upon Example 1, to further improve mining efficiency or increase production capacity, two ore blocks can be mined simultaneously using a subsequent backfilling method, such as... Figures 1-2 As shown, the method includes:

[0054] S1: As Figure 1 As shown, the middle section transport roadway 3 is excavated along the strike. A middle section bottom pillar 2 is left between the middle section transport roadway 3 and the lower middle section filling body 1. The middle section bottom pillar 2 is also the top pillar of the lower middle section.

[0055] In this middle section, the middle section return airway 6 is excavated along the strike at the top of the middle section. The middle section top pillar 7 is left between the middle section return airway 6 and the upper middle section ore body 8. This middle section top pillar 7 will later serve as the bottom pillar of the upper middle section.

[0056] A pseudo-inclined uphill tunnel 15 is excavated every 125m along the strike to connect the middle section transport tunnel 3 and the middle section return air tunnel 6. The angle between the pseudo-inclined uphill tunnel 15 and the strike of the vein is about 30°. A block is formed between two adjacent pseudo-inclined uphill tunnels 15. The unmined blocks in the figure are defined as the first block 51, the second block 52, the third block 53, the fourth block 54 to the nth block from left to right.

[0057] S2: As Figure 1 As shown, for each ore block, several pseudo-inclined ore rooms 10 are arranged sequentially. The angle between the pseudo-inclined ore room 10 and the vein strike is about 120°. The pseudo-inclined ore room 10 is opposite to the pseudo-inclined direction of the pseudo-inclined uphill 15. The width of the pseudo-inclined ore room 10 is 10m.

[0058] S3: As Figure 1 As shown, for the first block 51 and the third block 52, the auxiliary transport roadway 11 is excavated from the pseudo-inclined uphill 15 on its right side to the left along the strike. The auxiliary transport roadway 11 is excavated to the boundary of the leftmost stope 10. The auxiliary transport roadway 11 is parallel to the middle transport roadway 3, and a 4m wide transport roadway protective pillar 4 is left between them.

[0059] For each ore room 10, a ventilation and ore drawing hole 12 is drilled along the floor and in the lower part of the ore room from the false inclined ramp 15 on the right side thereof or from the auxiliary transport roadway 11 below the ore room; preferably, the ventilation and ore drawing holes 12 are drilled in the ore room 10 from top to bottom in sequence; the drilled ore is directly transported by the mine car from the false inclined ramp 15 via the auxiliary transport roadway 11 or from the false inclined ramp 15 to the middle section transport roadway 3 and then transported out;

[0060] The route of the air intake of the first ore block 51 is designed to pass through the middle section transport roadway 3 from left to right to the false inclined ramp 15 on the right side of the first ore block 51 and the third ore block 53, to provide fresh air for the miners who construct the ventilation and ore drawing hole 12 in the false inclined ramp 15 on the right side of the first ore block 51 and the third ore block 53, and then the air flow is discharged to the right through the middle section return air roadway 6, and the auxiliary transport roadway 11 ventilation can be provided with a fan at the intersection of the auxiliary transport roadway 11 and the right side false inclined ramp 15 to blow air;

[0061] At this time, the air curtains can be arranged near the middle section transport roadway 3 in the false inclined ramps 15 on the left side of the first ore block 51 and the third ore block 53, and the air curtains can be arranged on the middle section return air roadway 6 on the upper side of the first ore block 51, and the constructed ventilation and ore drawing hole 12 is temporarily blocked, and the air flow direction guided by the arrangement of the air curtains is a conventional technology in the field, which will not be described here;

[0062] S4: as shown in Figure 1 For the second ore block 52 and the fourth ore block 54, after the ore body in the lowermost ore room 10 is mined, it is used as a transfer chamber 13, and a transport roadway protection pillar 4 is left between the transfer chamber 13 and the middle section transport roadway 3; a chute 14 is constructed in the transport roadway protection pillar 4 to connect the transfer chamber 13 and the middle section transport roadway 3;

[0063] S5: for the first ore block 51 and the third ore block 53, the ore rooms 10 are mined from top to bottom in a one-in-two manner, and for each ore room, two routes are mined, both of which are constructed along the length of the ore room 10, and the lower route is mined first, that is, the route where the ventilation and ore drawing hole 12 is located, and a boom-type roadheader 18 is used to mine from left to right, and the mined ore passes through the ventilation and ore drawing hole 12 to the right side false inclined ramp 15, and then reaches the transfer chamber 13, and is accumulated in the transfer chamber 13; the route of the air intake is designed to pass through the middle section transport roadway 3 from left to right to the false inclined ramp 15 on the left side of the first ore block 51 and the third ore block 53, and then to the false inclined ramp 15 on the right side of the first ore block 51 and the third ore block 53 via the ventilation and ore drawing hole 12, to provide fresh air for the miners who perform the mining and ore transport in the ore room 10, and then the air flow is discharged to the right through the middle section return air roadway 6;

[0064] Then, the upper access road is mined using a cantilever tunneling machine 18 from left to right. The mined ore passes through the already mined access road in the lower part of the stope to the pseudo-inclined uphill 15 on the right, and then reaches the transfer chamber 13, where it is stored. The air intake route is designed to go from left to right through the middle transport roadway 3 to the pseudo-inclined uphill 15 on the left side of the first block 51 and the third block 53, and then through the already mined access road in the lower part of the stope to the pseudo-inclined uphill 15 on the right side of the first block 51 and the third block 53, providing fresh air for miners who are tunneling, dropping and transporting ore in the stope 10. After that, the airflow is discharged to the right through the middle return airway 6.

[0065] At this time, an air curtain can be set up at the location of the pseudo-inclined uphill 15 on the left side of the first block 51 and the third block 53 near the middle return airway 6, and an air curtain can be set up at the location of the pseudo-inclined uphill 15 on the right side of the first block 51 and the third block 53 near the middle transport airway 3.

[0066] The ore stored in the transfer chamber 13 is transported directly out through the ore layer in the intermediate transport roadway 3 via the chute 14, meaning that the mine car only needs to work in the intermediate transport roadway 3.

[0067] S6: As Figure 2 As shown, for the first block 51 and the third block 53, after mining the ore chamber 10 in an alternating manner, a pillar 16 is formed between the adjacent mined ore chambers 10; for the mined ore chamber 10, filling retaining walls 19 are constructed on both sides of its length direction, and then filling material is injected into it to form a filling body 17; the filling pipeline runs from the middle section transport roadway 3 or the middle section return air roadway 6 through the pseudo-inclined uphill 15 on the left side of the first block 51 to the ore chamber 10 that needs to be filled;

[0068] The air intake route is designed to reach the pseudo-inclined uphill 15 on the left side of the first block 51 and the third block 53 from the middle section transport roadway 3, and then pass through the filling room 10 to provide fresh air for the miners who are carrying out filling work in the room 10; after that, the airflow is led out by a fan to the middle section return airway 6.

[0069] The transfer chamber 13 in the second block 52 and the fourth block 54 is filled.

[0070] S7: Refer to the mining methods of the first block 51 and the third block to mine the second block 52 and the fourth block 54, and so on, until all blocks are mined.

[0071] This invention is not limited to the preferred embodiments described above. Anyone can derive other methods in various forms under the guidance of this invention. Any technical solution that is the same as or similar to this application falls within the protection scope of this invention.

Claims

1. A method for mining phosphate rock by using a boom-type tunneling machine for cutting and subsequent filling, characterized in that, Comprising the following steps: S1: in the lower section of the heading, a section of the haulage roadway is excavated along the strike, and a section of the return airway is excavated above the heading; a pseudo-inclined upraise is excavated along the strike to connect the section of the haulage roadway and the section of the return airway, and a mining block is formed between two adjacent pseudo-inclined upraises, which are numbered in sequence; S2: for each mining block, a plurality of pseudo-inclined rooms are arranged in sequence, and the pseudo-inclined rooms are opposite to the pseudo-inclined direction of the pseudo-inclined upraises; S3: an auxiliary haulage roadway is excavated from the right side of the pseudo-inclined upraise of the first mining block along the strike to the left, the auxiliary haulage roadway is excavated to the boundary of the leftmost room, and a haulage roadway protection pillar is left between the auxiliary haulage roadway and the section of the haulage roadway; For each room, a ventilation and ore-out hole is drilled along the length of the room and at the lower part of the room from the pseudo-inclined upraise on the right side or from the auxiliary haulage roadway below; S4: for the second mining block, after the ore body in the lowermost room is mined, the room is used as a transfer chamber, a haulage roadway protection pillar is left between the transfer chamber and the section of the haulage roadway, and a chute is constructed in the haulage roadway protection pillar to connect the transfer chamber and the section of the haulage roadway; S5: the rooms are mined from top to bottom in a one-out-of-two manner, for each room, the room is mined in two entries, both of which are constructed along the length of the room, the lower entry is first mined by using a boom-type roadheader, the mined ore is transported to the pseudo-inclined upraise on the right side through the ventilation and ore-out hole, and then to the transfer chamber, and the ore is accumulated in the transfer chamber; then the upper entry is mined from left to right by using a boom-type roadheader, the mined ore is transported to the pseudo-inclined upraise on the right side through the lower mined entry of the room, and then to the transfer chamber, and the ore is accumulated in the transfer chamber; the ore accumulated in the transfer chamber is put into the ore layer in the section of the haulage roadway through the chute and directly transported out; S6: the mined rooms are filled; S7: the second mining block is mined in the same way as the first mining block, and the mining of all the mining blocks is completed in this way; In step S3, ventilation and ore-out holes are drilled in the rooms from top to bottom in sequence, the drilled ore is directly transported to the section of the haulage roadway from the pseudo-inclined upraise or from the pseudo-inclined upraise through the auxiliary haulage roadway, and then transported out; the route of the air intake is designed to reach the pseudo-inclined upraise on the left side of the first mining block from left to right through the section of the haulage roadway, and then the air flow is discharged to the right through the section of the return airway; an air blower is arranged at the intersection of the auxiliary haulage roadway and the pseudo-inclined upraise on the right side to blow air.

2. The method of mining phosphate ore according to claim 1, characterized in that, A section of the bottom pillar is left between the section of the haulage roadway and the lower section of the filling body; a section of the top pillar is left between the section of the return airway and the upper section of the ore body.

3. The method of mining phosphate ore according to claim 1, characterized in that, The angle between the pseudo-inclined upraise and the strike is 30°; the angle between the pseudo-inclined room and the strike is 120°; the distance between two adjacent pseudo-inclined upraises is 100-125 m; and the width of the pseudo-inclined room is 10 m.

4. The method of mining phosphate ore according to claim 1, characterized in that, In step S5, the route of the air intake is designed to reach the pseudo-inclined upraise on the left side of the first mining block from left to right through the section of the haulage roadway, to reach the pseudo-inclined upraise on the right side of the first mining block through the ventilation and ore-out hole or the lower mined entry, and then the air flow is discharged to the right through the section of the return airway.

5. The method of mining phosphate ore according to claim 1, characterized in that, In step S6, filling retaining walls are constructed on both sides of the length of the mined room, and then filling materials are poured into the filling retaining walls to form a filling body.

6. The method of mining phosphates deposits according to claim 5, characterized in that, In step S6, the filling pipeline reaches the mine chamber to be filled from the middle section transportation roadway or the middle section air return roadway via the pseudo-inclined ramp on the left side of the first ore block.

7. The method of mining phosphate ore according to claim 1, characterized in that, In step S6, the filling pipeline reaches the mine chamber to be filled from the middle section transportation roadway or the middle section air return roadway via the pseudo-inclined ramp on the left side of the first ore block.

8. The method of mining phosphates deposits according to claim 1, characterized in that, With reference to the stoping scheme of the first ore block, the third ore block is simultaneously stoped with the first ore block, and with reference to the stoping scheme of the second ore block, the fourth ore block is simultaneously stoped with the second ore block; and so on until all the ore blocks are mined.

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