Downward access road filling mining method

A mining method and approach filling technology, which is applied in underground mining, filling, surface mining, etc., can solve the problems of reduced economic benefits of mine mining, difficulty in meeting market demand, and large amount of filling materials, so as to improve the comprehensive utilization rate , Shorten recovery time and reduce usage

Active Publication Date: 2020-05-08
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the decline of ore grades, the economic benefits of mining continue to decrease. The filling process is complex and the amount of filling materials used in this filling mining method is relatively large, which leads to high mining costs and has gradually become difficult to meet market demand.

Method used

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  • Downward access road filling mining method
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  • Downward access road filling mining method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as Figure 1~4 As shown, a downward approach filling mining method includes the following steps:

[0040] S1. Ore block division: Divide the mining area into alternately distributed interval filling layers 1 and full filling layers 2 from the vertical direction. The access routes are arranged orthogonally and alternately distributed at equal heights, forming the stope roof 5, the stope floor 6 and the stope surrounding rock 7;

[0041] S2. Divide the gap filling layer 1 and the full filling layer 2 into a plurality of alternately distributed first bars 3 and second bars 4, the gap filling layer 1 and the full filling layer 2 The first bar 3 and the second bar 4 are equal sections with equal width and height;

[0042] S3. The mining sequence in the stope area is mining layer by layer in the downward approach, in which the adjacent interval filling layer 1 and the complete filling layer 2 are arranged perpendicular to each other;

[0043] S4. When exploiting the i...

Embodiment 2-5

[0053] Embodiments 2-5 provide a mining method for filling downwards. Compared with Embodiment 1, the difference is that in step S4, the mass percentage of the raw material composition of the high-strength quick-setting filling material is changed, except for the above differences , and other operations are the same, and will not be repeated here; the specific condition parameters and the results of setting time and compressive strength of each filling body are shown in the table below.

[0054]

[0055] It can be seen from the results in the above table that changing the mass percentage of the raw material composition of the high-strength quick-setting filling material described in step S4 will have a significant impact on the coagulation time and compressive strength of the coagulated filling body, and the raw material ratio of Example 1 is lower. The comprehensive properties of setting time and compressive strength of the formed filling body are the best. Comparing the r...

Embodiment 6-12

[0057] Embodiments 6-12 provide a mining method for filling downwards. Compared with Embodiment 1, the difference is that in step S4, the particle size range and the size range of the waste rock in the high-strength quick-setting filling material are changed. Weight ratio, except for the above differences, other operations are the same and will not be repeated here; the specific condition parameters and compressive strength results of each filling body are shown in the table below.

[0058]

[0059] As can be seen from the results in the above table, changing the particle size range and weight ratio of the waste rock in the high-strength quick-setting filling material described in step S4 will have a significant impact on the compressive strength of the filling body after setting, and Example 1 Under the ratio of raw materials, the comprehensive performance of compressive strength of the formed filling body is the best. Comparing the results of Example 1, Examples 6-7 and E...

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Abstract

The invention discloses a downward access road filling mining method which comprises the following steps: dividing a mining area into interval filling layers and complete filling layers alternately distributed in the vertical direction, adopting the downward access road layer-by-layer mining method, and alternately filling a high-strength quick setting filling material and a low-strength quick setting filling material in goafs of the interval filling layers and the complete filling layers, wherein the high-strength quick setting filling material is made of cement clinker, whole tailings, wasterock and an accelerator, and the low-strength quick setting filling material is made of cement, active slag, tailings and an accelerator, so that an upper-layer filling body is jointly supported by alower-layer high-strength filling body and a low-strength filling body to prevent the upper-layer filling body from collapse, the using quantity of cement in mining safe filling material is ensured,and the filling cost is reduced; and in addition, a small quantity of accelerator is added in the filling material to greatly shorten the time waiting for the filling material to reach the preset strength, so that the stoping time is shortened to greatly improve the mining efficiency.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a mining method for filling a downward approach. Background technique [0002] Filling mining method is a mining method that uses filling materials to fill goafs during the mining process. It can use filling materials for support, prevent surrounding rock collapse and surface subsidence, protect the ground and surface environment, and maximize the recovery of mineral resources. , and thus has been widely used. According to the different mining direction and filling method of the ore body, the filling mining method can be divided into the upward approach filling method, the downward approach filling method, and the subsequent filling mining method. Among them, the downward approach filling method builds an artificial false roof, so that under the protection of the artificial roof, the ore body is mined layer by layer from top to bottom, and the filling material is filled into the ...

Claims

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Application Information

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IPC IPC(8): E21C41/22E21F15/00C04B28/02
CPCC04B28/02C04B2111/00724C04B2201/50E21C41/22E21F15/005C04B18/12C04B18/0427C04B22/142C04B22/00C04B22/14C04B18/141
Inventor 戴兵张雷陈英
Owner NANHUA UNIV
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