A mining method for staged drilling and subsequent filling in the first stage mining area

Abstract

The present invention relates to a method for mining in a staged first mining panel area, followed by filling mining, which is as follows: the first mining panel area is divided into a mine room and a mine pillar; firstly, the first section of a plurality of mine rooms is subjected to one-step staged open-field mining; then, the remaining sections and the remaining mine rooms of the above mine rooms are subjected to two-step staged rock drilling mining and one-step filling; finally, the mine pillars are subjected to three-step staged rock drilling mining and two-step filling; the filling wells in the one-step filling and two-step filling processes are arranged at the far end boundary and the near end boundary of the ore body, respectively. The present invention has the characteristics of short mining time and high filling and top-forming rate, and can effectively improve the production capacity of a mine with mining imbalance in the process of staged connection mining.

Description

Technical Field

[0001] The present invention relates to the technical field of underground mining methods, and in particular to a mining method for a first-stage mining panel area with staged rock drilling followed by ore extraction and subsequent filling. Background Art

[0002] The method of mining by subdividing the ore into sections and then backfilling is one of the main mining methods for underground mining of steeply inclined ore bodies. It has outstanding advantages such as high mining intensity, high labor productivity, good ventilation conditions and simple management. It has been widely used in mines at home and abroad.

[0003] However, in the process of connecting the upper and lower stages of mining, many mines have mining imbalances due to various reasons. The mining of the ore body in the previous stage is about to end, and the stage transportation tunnel of the next stage has not been completed, and the third-level ore volume has not been formed. In the traditional mining method of mining in the stage of segmented rock drilling and then filling, the ore collapsed in each segment needs to be concentrated in the last segment of the ore block, and slid to the stage transportation tunnel through the chute, and then transferred by mine cars to the main chute system. Before the stage transportation tunnel is completed, the ore of this stage cannot be transported out, resulting in no ore to be mined in the initial stage of the next stage of mining. Even after the completion of the stage transportation tunnel, it will take a long time for the mining and cutting engineering construction before the stage can be officially put into production, resulting in a serious shortage of production capacity in the first mining area of ​​the mine during the connection between the upper and lower stages of mining. Summary of the invention

[0004] The present invention aims to overcome the shortcomings of the prior art and aims to provide a mining method for a mine with a mining imbalance, which can shorten the mining time of the first mining area in the stage and improve the production capacity of the mine with mining imbalance in the stage connection mining process.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] The method for mining with subsequent backfilling in the staged rock drilling phase for the first mining area comprises the following steps: S1, dividing the mining body to be mined in the mining phase into top and bottom pillars and m segments along the inclination direction of the ore body, with the top and bottom pillars being 4-10m high and the segment being 10-20m high; dividing the mining body to be mined into several areas along the strike direction of the ore body; dividing the first mining area of ​​the mining body to be mined into i mining rooms and j mining pillars, with the mining rooms and mining pillars arranged in a staggered manner, with a width of 10-20m and a length equal to the thickness of the ore body, and each mining room and mining pillar being perpendicular to the strike direction of the ore body.

[0007] S2, one-step mining, cutting and recovery, excavating the segmented transport tunnel from top to bottom in the 2nd to mth segment of the first mining area;

[0008] A drilling tunnel is excavated from the upper stage transport tunnel to the 1st to kth mining rooms to reach the far end boundary of the ore body, and a cutting tunnel and a cutting shaft are excavated at the end of the drilling tunnel. The k is the number of excavation teams, k≤i.

[0009] S3, one-step mining, after one-step mining and cutting are completed, the 1st section ore body of the 1st to kth mining room is mined.

[0010] S4, second step of mining and cutting, S41: after the first step of mining and cutting is completed, rock drilling tunnels are excavated from the 2nd to mth segment transport tunnels to the 1st to kth mining rooms to reach the far end boundary of the ore body, and a cutting tunnel and a cutting shaft are excavated at the end of the mth segment rock drilling tunnel;

[0011] From the mth segment transport tunnel, the loading tunnel is excavated successively to the 1st to kth ore pillars, and from the loading tunnel, the mine exit road is excavated to the end of the adjacent mine room;

[0012] In the middle of the mth segment transport tunnel in the first mining area, a chute is excavated downwards to connect the stage transport tunnel of the mining stage.

[0013] S42: According to the method of S41, continue to excavate rock drilling tunnels, cutting tunnels and cutting shafts into the remaining mine rooms, and continue to excavate loading tunnels and mine access roads into the remaining pillars.

[0014] S5, two-step mining,

[0015] S51: After the completion of S41, the 2nd to mth segment ore bodies of the 1st to kth mining rooms are mined.

[0016] S52: After S42 is completed, the remaining ore bodies in the mining chamber are mined according to the method of S51.

[0017] S6, after the first step of filling and the second step of mining are completed, filling wells are successively dug in the top and bottom pillars above the 1st to ith mining rooms to fill the goaf formed after the mining of the 1st to ith mining rooms.

[0018] S7, three-step mining and cutting. After the second step of mining and cutting is completed, the drilling tunnels are excavated from the upper stage transportation tunnel and the 2nd to mth segment transportation tunnels to the 1st to jth pillars to reach the far end of the ore body, and the cutting tunnel and cutting shaft are excavated at the end of the mth segment drilling tunnel.

[0019] 28 days after the completion of one step of filling, the loading tunnels are excavated from the mth segment transportation tunnel to the filling body formed after the mining of the 1st to ith mine rooms, and the mine exit roads are excavated from each loading tunnel to the end of the adjacent ore pillar.

[0020] S8, three-step mining. After the three-step mining and cutting are completed, the 1st to jth pillars are mined in sequence.

[0021] S9, the second step is to fill. After the third step of mining is completed, filling wells are successively dug in the top and bottom pillars above the 1st to jth pillars to fill the goaf formed after the mining of the 1st to jth pillars.

[0022] Furthermore, the to-be-mined body includes the unmined body in the last segment of the previous mining stage and the unmined body in the 1st to m-1st segments of the mining stage.

[0023] Furthermore, the rock drilling tunnel and the ore loading tunnel are perpendicular to the direction of the ore body.

[0024] Furthermore, the steps of recovering the 1st segment ore body of the 1st to kth mining room in the first mining disk area include: after the first step of mining and cutting is completed, fan-shaped blast holes are drilled in the 1st segment drilling tunnel of the 1st to k mining rooms, and mining is withdrawn from the far end boundary of the ore body, 1 to 2 rows of fan-shaped blast holes are detonated at a time, and the shovel loader unloads the mine in the drilling tunnel and transfers the ore to the dump truck, the dump truck transfers the ore to the upper stage chute of the first mining disk area through the ramp, and the ore is slid into the mine car through the upper stage chute.

[0025] Furthermore, the step of mining the 2nd to mth segmented ore body of the 1st to kth ore room in the first mining area includes: after the two steps of mining and cutting are completed, fan-shaped blast holes are drilled in the 2nd to mth segmented rock drilling tunnels of the 1st to kth ore rooms, and mining is withdrawn from the far end boundary of the ore body, and 1 to 2 rows of fan-shaped blast holes are detonated at one time in each segment, and the shovel loader exits the mine at the exit entrance of the 1st to kth ore pillars, and the ore is transported to the chute of the first mining area through the loading tunnel, and the ore is released into the mine car through the chute.

[0026] Furthermore, the steps of recovering the 1st to jth pillars include: after the three steps of mining and cutting are completed, fan-shaped blast holes are drilled in the rock drilling tunnels of each segment of the 1st to jth pillars, and mining is carried out from the far end boundary of the ore body, 1 to 2 rows of fan-shaped blast holes are detonated at one time in each segment, and the shovel loader exits the mine at the exit entrance of the 1st to i mine rooms, and the ore is transported to the chute of the first mining area through the loading tunnel, and the ore is released into the mine car through the chute.

[0027] Furthermore, the filling wells are arranged as follows: the filling wells of the first mining pan area ore chamber are located at the far end of the ore body, and the filling wells of the first mining pan area ore pillars are located at the near end of the ore body.

[0028] Compared with the prior art, the present invention has the following beneficial effects: when the mining approval engineering of the stage development system and the first mining area to be mined blocks is not completely completed, the present invention carries out segmented open-field mining of the first mining section in advance, and uses the upper stage transportation system to transport ore, thereby solving the technical problem of no ore to be mined in the early stage of stage mining, shortening the mining time of the stage first mining area, and improving the production capacity of the mine with mining imbalance in the process of stage connection mining; the filling wells of adjacent ore blocks are staggered at the far and near ends of the ore body, thereby improving the filling and roofing rate; it is mainly used for filling and mining mines after ore is produced in the segmented rock drilling stage with mining imbalance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of a one-step recovery process for the first mining panel area of ​​the present invention;

[0030] Figure 2 for Figure 1 Schematic diagram of the cross section along the AA direction;

[0031] Figure 3 for Figure 1 A schematic cross-sectional view along the BB direction;

[0032] Figure 4 for Figure 1 A schematic cross-sectional view of the CC direction;

[0033] Figure 5 for Figure 1 A schematic diagram of a two-step recovery process for the panel area;

[0034] Figure 6 for Figure 5 Schematic diagram of the cross section along the middle DD direction;

[0035] Figure 7 for Figure 5 A schematic cross-sectional view of the EE direction;

[0036] Figure 8 for Figure 5 A schematic cross-sectional view of the FF direction;

[0037] Fig. 9 for Figure 1 A schematic diagram of the three-step recovery process for the panel;

[0038] Fig.10 for Fig. 9 Schematic diagram of the cross section along the middle GG direction;

[0039] Fig.11 for Fig. 9 A schematic cross-sectional view of the HH direction;

[0040] Fig.12 for Fig. 9Schematic diagram of the cross section along II direction. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods, which are not intended to limit the protection scope of the present invention.

[0042] See the attached Figure 1-12 According to an embodiment of the present invention, a method for mining in a staged first mining panel area with staged rock drilling and subsequent filling is provided, the method comprising:

[0043] S1 Mine Room Pillar Division

[0044] Along the dip direction of the ore body, the mined body in the mining stage is divided into top and bottom pillars 1 and 6 sections, with the top and bottom pillars 1 being 6m high and the section being 15m high; along the strike direction of the ore body, the mined body is divided into several panels; the first mining panel of the mined body is divided into 3 mine rooms 2 and 3 pillars 3, with the mine rooms 2 and pillars 3 arranged alternately, with a width of 15m and a length equal to the thickness of the ore body, and each mine room 2 and pillar 3 being perpendicular to the strike of the ore body.

[0045] S2-step alignment and cutting

[0046] In the first mining area, the 2nd to 6th sections are excavated from top to bottom in the section transport tunnel 16;

[0047] There are two excavation teams in this panel area. They excavate a drilling tunnel 5 from the upper stage transport tunnel 4 to the first and second mine rooms 2 to reach the far boundary of the ore body, and excavate a cutting tunnel 6 and a cutting shaft 7 at the end of the drilling tunnel 5.

[0048] S3 one-step mining

[0049] After the first step of mining and cutting is completed, the first section of the ore body in the first and second mining rooms 2 is mined.

[0050] S4 two-step alignment and cutting

[0051] Step 1: After the first step of mining and cutting is completed, the drilling tunnels 5 are excavated from the 2nd to 6th segmented transport tunnels 16 to the 1st and 2nd mining rooms 2 to reach the far end boundary of the ore body, and the cutting tunnel 6 and the cutting shaft 7 are excavated at the end of the 6th segmented drilling tunnel 5;

[0052] From the sixth stage transport tunnel 16, a loading tunnel 10 is excavated successively to the first and second ore pillars 3, and from the loading tunnel 10, a mine exit passage 11 is excavated to the end of the adjacent mine room 2;

[0053] In the middle of the sixth segment transport tunnel 16 in the first mining area, a chute 12 is excavated downward to connect to the stage transport tunnel 13 of the mining stage.

[0054] Step 2: After completing step 1 of two-step mining and cutting, continue to excavate the drilling tunnel 5, cutting tunnel 6 and cutting shaft 7 into the remaining mine room 2 according to the method of step 1 of two-step mining and cutting, and continue to excavate the loading tunnel 10 and the mine access road 11 into the remaining ore pillars 3.

[0055] S5 two-step recovery

[0056] Step 1: Second step of mining and cutting After the completion of step 1, the 2nd to 6th sections of the ore bodies in the 1st and 2nd mining rooms 2 are mined.

[0057] Step 2: After the completion of step 2 of two-step mining and cutting, the remaining chamber 2 ore body is mined according to the method of step 1 of two-step mining.

[0058] S6 one-step filling

[0059] After the second step of mining is completed, filling wells 14 are successively excavated in the top and bottom pillars above the 1st to 3rd mining rooms 2 to fill the goaf formed after the mining of the 1st to 3rd mining rooms 2.

[0060] S7 three-step alignment and cutting

[0061] After the second step of mining and cutting is completed, the drilling tunnel 5 is excavated from the upper stage transport tunnel 4 and the 2nd to 6th segment transport tunnels 16 to the 1st to 3rd pillars 3 to reach the far boundary of the ore body, and the cutting tunnel 6 and cutting shaft 7 are excavated at the end of the 6th segment drilling tunnel 5.

[0062] 28 days after the completion of one step of filling, the loading tunnels 10 are excavated from the 6th segmented transport tunnel 16 to the filling body formed after the mining of the 1st to 3rd mine rooms 2, and the mine exit roads 11 are excavated from each loading tunnel 10 to the end of the adjacent mine pillar 3.

[0063] S8 three-step recovery

[0064] After the three steps of mining and cutting are completed, the 1st to 3rd pillars 3 are mined in turn.

[0065] S9 two-step filling

[0066] After the three-step mining is completed, filling wells 14 are successively excavated in the top and bottom pillars above the 1st to 3rd pillars 3 to fill the goaf formed after the mining of the 1st to 3rd pillars 3.

[0067] Furthermore, the to-be-mined body includes the unmined body in the last segment of the previous mining stage and the unmined body in the first to fifth segments of the mining stage.

[0068] Furthermore, the rock drilling tunnel 5 and the ore loading tunnel 10 are perpendicular to the direction of the ore body.

[0069] Furthermore, the steps of recovering the first segmented ore body of the first and second mining rooms 2 in the first mining disk area include: after the first step of mining and cutting is completed, fan-shaped blast holes 15 are drilled in the first segmented rock drilling tunnels 5 of the first and second mining rooms 2, and mining is withdrawn from the far end boundary of the ore body, two rows of fan-shaped blast holes 15 are detonated at one time, and the shovel loader unloads the mine in the rock drilling tunnel 5 and transfers the ore to the dump truck, and the dump truck transfers the ore to the upper stage chute 9 of the first mining disk area through the ramp 8, and the ore is slid into the mine car through the upper stage chute 9.

[0070] Furthermore, the steps of recovering the 2nd to 6th segmented ore bodies in the 1st and 2nd mining rooms 2 of the first mining area include: after the two steps of mining and cutting are completed, fan-shaped blast holes 15 are drilled in the 2nd to 6th segmented rock drilling tunnels 5 of the 1st and 2nd mining rooms 2, and mining is withdrawn from the far end boundary of the ore body, and two rows of fan-shaped blast holes 15 are detonated at one time in each segment, and the shovel loader unloads the ore at the 1st and 2nd mining pillars 3 exit route 11, and the ore is transported to the chute 12 of the first mining area through the loading tunnel 10, and the ore is discharged into the mine car through the chute 12.

[0071] Furthermore, the steps of recovering the 1st to 3rd ore pillars 3 include: after the three steps of mining and cutting are completed, fan-shaped blast holes 15 are drilled in the rock drilling tunnels 5 of each segment of the 1st to 3rd ore pillars 3, and mining is carried out from the far end boundary of the ore body, and two rows of fan-shaped blast holes 15 are detonated at one time in each segment, and the shovel loader exits the ore at the exit route 11 of the 1st to 3rd mine room 2, and the ore is transported to the chute 12 of the first mining area through the loading tunnel 10, and the ore is discharged into the mine car through the chute 12.

[0072] Furthermore, the filling wells are arranged as follows: the filling wells of the first mining pan area ore chamber 2 are located at the far end of the ore body, and the filling wells of the first mining pan area ore pillars 3 are located at the near end of the ore body.

Claims

1. A mining method for the first stage mining area with staged rock drilling followed by filling, characterized by: The following steps are involved: S1. Divide the ore chambers and pillars. Along the ore body inclination direction, divide the ore body to be mined in the mining stage into top and bottom pillars and m sections. The top and bottom pillars are 4-10m high and the section height is 10-20m. Along the strike direction of the ore body, divide the ore body to be mined into several panels. Divide the first mining panel of the ore body to be mined into i ore chambers and j ore pillars. The ore chambers and ore pillars are arranged alternately. The width of the ore chambers and ore pillars is 10-20m. The length of the ore chambers and ore pillars is the thickness of the ore body. Each ore chamber and ore pillar is perpendicular to the strike direction of the ore body. S2, one-step mining and cutting, excavating the segmented transport tunnel from top to bottom in the 2nd to mth segment of the first mining area; excavating the rock drilling tunnel from the upper stage transport tunnel to the 1st to kth mining room to reach the far end of the ore body, and excavating the cutting tunnel and cutting shaft at the end of the rock drilling tunnel, where k is the number of excavation teams and k≤i; S3, one-step mining, mining the 1st section ore body of the 1st to kth mining rooms; S4, two steps of alignment and cutting; S5, two-step mining; S6, filling in the first step, after the second step of mining is completed, filling wells are successively excavated in the top and bottom pillars above the 1st to i-th mining rooms to fill the goaf formed after the mining of the 1st to i-th mining rooms; S7, three-step mining and cutting. After the second step of mining and cutting is completed, the rock drilling tunnels are successively excavated from the upper stage transportation tunnel and the 2nd to mth segment transportation tunnels to the 1st to jth ore pillars to reach the far end boundary of the ore body, and the cutting tunnel and cutting shaft are excavated at the end of the mth segment rock drilling tunnel; After a period of time after the filling of a step is completed, a loading tunnel is excavated from the mth segment transportation tunnel to the filling body formed after the mining of the 1st to ith ore rooms, and an exit route is excavated from each loading tunnel to the end of the adjacent ore pillar; S8, three-step mining, after the three-step mining and cutting are completed, the 1st to jth ore pillars are mined successively; S9, the second step is to fill. After the third step of mining is completed, filling wells are successively dug in the top and bottom pillars above the 1st to jth pillars to fill the goaf formed after the mining of the 1st to jth pillars.

2. The method for mining by staged rock drilling and subsequent backfilling for the staged initial mining panel according to claim 1 is characterized by: The step S4 specifically includes the following steps: S41, after the first step of mining and cutting is completed, the rock drilling tunnels are successively excavated from the 2nd to mth segmented transport tunnels to the 1st to kth mining rooms to reach the far end boundary of the ore body, and the cutting tunnel and cutting shaft are excavated at the end of the mth segmented rock drilling tunnel; From the mth segment transport tunnel, the loading tunnel is excavated successively to the 1st to kth ore pillars, and from the loading tunnel, the mine exit road is excavated to the end of the adjacent mine room; In the middle of the mth segment transport tunnel in the first mining area, a chute is excavated downwards to connect with the stage transport tunnel of the mining stage; S42. According to the S41 method, continue to excavate rock drilling tunnels, cutting tunnels and cutting shafts into the remaining mine rooms, and continue to excavate loading tunnels and mine access roads into the remaining pillars.

3. The method for mining by staged rock drilling and subsequent backfilling for the staged initial mining panel according to claim 2 is characterized by: The step S5 specifically The following steps are included: S51: after the completion of step S41, mining the 2nd to mth segment ore bodies of the 1st to kth ore rooms; S52: After step S42 is completed, the remaining ore body in the mining chamber is mined.

4. The method for mining by staged rock drilling and subsequent backfilling for the staged initial mining panel according to claim 1, characterized in that: The to-be-mined body includes the unmined body in the last segment of the previous mining stage and the unmined body in the 1st to m-1st segments of the mining stage.

5. The method for mining by staged rock drilling and subsequent backfilling for the staged initial mining panel according to claim 1, characterized in that: The rock drilling tunnel and the ore loading tunnel are perpendicular to the direction of the ore body.

6. The method for mining by staged rock drilling and subsequent backfilling for the staged initial mining panel according to claim 1, characterized in that: The S3 specifically includes the following steps: after the first step of mining and cutting is completed, fan-shaped blastholes are drilled in the 1st segmented rock drilling tunnel of the 1st to kth mining rooms, and mining is withdrawn from the far end boundary of the ore body. 1 to 2 rows of fan-shaped blastholes are detonated at a time. The shovel loader mines in the rock drilling tunnel and transfers the ore to the dump truck. The dump truck transfers the ore to the upper stage chute of the first mining panel through the ramp, and the ore is slid into the mine car through the upper stage chute.

7. The method for mining by staged rock drilling and subsequent backfilling for the staged initial mining panel according to claim 3 is characterized by: The step S51 comprises the following steps: successively drilling fan-shaped blastholes in the 2nd to mth segmented rock drilling tunnels of the 1st to kth mining rooms, withdrawing mining from the far end boundary of the ore body, simultaneously detonating 1 to 2 rows of fan-shaped blastholes in each segment, and the shovel loader exits the mine at the 1st to kth mining pillar exit entrance, and transports the ore to the chute of the first mining panel through the loading tunnel, and the ore is discharged into the mine car through the chute.

8. The method for mining by staged rock drilling and subsequent backfilling for the staged initial mining panel according to claim 1 is characterized by: The step S8 comprises the following steps: successively drilling fan-shaped blastholes in the rock drilling tunnels of each segment of the 1st to jth ore pillars, withdrawing mining from the far end boundary of the ore body, simultaneously detonating 1 to 2 rows of fan-shaped blastholes in each segment, and the shovel loader unloads the ore at the 1st to ith ore room exit route, and transports the ore to the chute of the first mining area through the loading tunnel, and the ore is discharged into the mine car through the chute.

9. The method for mining by staged rock drilling and subsequent backfilling for the staged initial mining panel according to claim 1, characterized in that: The filling wells are arranged in the following positions: the filling wells of the first mining pan area ore chamber are located at the far end of the ore body, and the filling wells of the first mining pan area ore pillars are located at the near end of the ore body.

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