Upward stratification:
1 in the horizontal stratified filling method, more suitable for solid rock ore mine medium; unstable when ore, should be used to approach the formula filling method;
The 2- point column filling method should be applied to inclined thick ore bodies with stable ore and medium ore values ​​below medium ore;
The width of the wall column of the 3- point column filling method should be 4m~6m , the diameter of the point column should be 4m~5m , and the total area of ​​the point column in the stope should not exceed 10% of the total area of ​​the stope ;
4 The upward filling method should adopt the two-step mining sequence of one room and one column. The thick ore body with large underground pressure and insufficient rock is suitable for one-bedroom, two-column, one-bedroom and three-column. Multi-step multi-step recovery arrangement of one-story multi-column; narrow and long single ore body can be fully traversed in one step;
5 The height of the stop of the stope should not be greater than 4.5m . When the pick-up trolley or service trolley can ensure the safety of the work, the height of the control top can be increased to 6m ~ 8m ;
6 When using manual inter-pillar to stratified filling method, the adjacent stope should be ahead of a certain distance;
7 When the span of the stope and the height of the goaf are large, or the ore of the local section is not stable, measures should be taken to reinforce the roof of the stope;
8 The design strength of the cemented backfill in the upward filling mining method shall meet the requirements of the self-standing height of the pillar mining and shall be able to withstand the impact of blasting vibration;
9 For the stope of the bottom column , a reinforced concrete with a thickness of not less than 0.4 m and a strength of not less than 15 MPa or a mortar cementitious barrier with a thickness of more than 5 m and a strength of more than 5 Mpa and a steel mesh laid on the bottom plate shall be constructed on the bottom column ; For the stope of the column, it is advisable to use the empty field method to fill the first mining column after cementing; the dry filling method can construct the concrete partition wall on the side of the adjacent column of the mine;
10 When using dry or tailings filling, it is advisable to lay a concrete cushion with a thickness of not less than 0.15m and a strength of not less than 15MPa on each layer filling surface ; when filling with low-strength cement, each layer of filling surface should be laid. a cemented backing body having a thickness of not less than 0.3 m and a strength of not less than 3 MPa ;
11 The stopway arranged in the vein should be less than two, the diameter should be greater than 3 times the maximum block size of the ore , and not less than 1.5m .
Downward stratification:
1 The downward filling mining method should be applied to the ore body which is extremely unstable and has high ore value and is difficult to be mined by the upward approach filling method;
2 The specification of the secondary mining route should be 3m~5m , and the height should be 2m~5m ;
3 When the mining approach adopts the inclined arrangement, the inclination angle of the inclined layer should be larger than the angle of the self-flow slope of the cement filling, and the angle of the slope should be 6 ° ~ 8 ° ;
4 The layered false top should be filled and solid, and the uniaxial compressive strength of the filling body should not be less than 3 MPa .
1 in the horizontal stratified filling method, more suitable for solid rock ore mine medium; unstable when ore, should be used to approach the formula filling method;
The 2- point column filling method should be applied to inclined thick ore bodies with stable ore and medium ore values ​​below medium ore;
The width of the wall column of the 3- point column filling method should be 4m~6m , the diameter of the point column should be 4m~5m , and the total area of ​​the point column in the stope should not exceed 10% of the total area of ​​the stope ;
4 The upward filling method should adopt the two-step mining sequence of one room and one column. The thick ore body with large underground pressure and insufficient rock is suitable for one-bedroom, two-column, one-bedroom and three-column. Multi-step multi-step recovery arrangement of one-story multi-column; narrow and long single ore body can be fully traversed in one step;
5 The height of the stop of the stope should not be greater than 4.5m . When the pick-up trolley or service trolley can ensure the safety of the work, the height of the control top can be increased to 6m ~ 8m ;
6 When using manual inter-pillar to stratified filling method, the adjacent stope should be ahead of a certain distance;
7 When the span of the stope and the height of the goaf are large, or the ore of the local section is not stable, measures should be taken to reinforce the roof of the stope;
8 The design strength of the cemented backfill in the upward filling mining method shall meet the requirements of the self-standing height of the pillar mining and shall be able to withstand the impact of blasting vibration;
9 For the stope of the bottom column , a reinforced concrete with a thickness of not less than 0.4 m and a strength of not less than 15 MPa or a mortar cementitious barrier with a thickness of more than 5 m and a strength of more than 5 Mpa and a steel mesh laid on the bottom plate shall be constructed on the bottom column ; For the stope of the column, it is advisable to use the empty field method to fill the first mining column after cementing; the dry filling method can construct the concrete partition wall on the side of the adjacent column of the mine;
10 When using dry or tailings filling, it is advisable to lay a concrete cushion with a thickness of not less than 0.15m and a strength of not less than 15MPa on each layer filling surface ; when filling with low-strength cement, each layer of filling surface should be laid. a cemented backing body having a thickness of not less than 0.3 m and a strength of not less than 3 MPa ;
11 The stopway arranged in the vein should be less than two, the diameter should be greater than 3 times the maximum block size of the ore , and not less than 1.5m .
Downward stratification:
1 The downward filling mining method should be applied to the ore body which is extremely unstable and has high ore value and is difficult to be mined by the upward approach filling method;
2 The specification of the secondary mining route should be 3m~5m , and the height should be 2m~5m ;
3 When the mining approach adopts the inclined arrangement, the inclination angle of the inclined layer should be larger than the angle of the self-flow slope of the cement filling, and the angle of the slope should be 6 ° ~ 8 ° ;
4 The layered false top should be filled and solid, and the uniaxial compressive strength of the filling body should not be less than 3 MPa .
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